CVE-2024-57979 (GCVE-0-2024-57979)

Vulnerability from cvelistv5 – Published: 2025-02-27 02:07 – Updated: 2026-08-05 11:47
VLAI
Title
pps: Fix a use-after-free
Summary
In the Linux kernel, the following vulnerability has been resolved: pps: Fix a use-after-free On a board running ntpd and gpsd, I'm seeing a consistent use-after-free in sys_exit() from gpsd when rebooting: pps pps1: removed ------------[ cut here ]------------ kobject: '(null)' (00000000db4bec24): is not initialized, yet kobject_put() is being called. WARNING: CPU: 2 PID: 440 at lib/kobject.c:734 kobject_put+0x120/0x150 CPU: 2 UID: 299 PID: 440 Comm: gpsd Not tainted 6.11.0-rc6-00308-gb31c44928842 #1 Hardware name: Raspberry Pi 4 Model B Rev 1.1 (DT) pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : kobject_put+0x120/0x150 lr : kobject_put+0x120/0x150 sp : ffffffc0803d3ae0 x29: ffffffc0803d3ae0 x28: ffffff8042dc9738 x27: 0000000000000001 x26: 0000000000000000 x25: ffffff8042dc9040 x24: ffffff8042dc9440 x23: ffffff80402a4620 x22: ffffff8042ef4bd0 x21: ffffff80405cb600 x20: 000000000008001b x19: ffffff8040b3b6e0 x18: 0000000000000000 x17: 0000000000000000 x16: 0000000000000000 x15: 696e6920746f6e20 x14: 7369203a29343263 x13: 205d303434542020 x12: 0000000000000000 x11: 0000000000000000 x10: 0000000000000000 x9 : 0000000000000000 x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000000 x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: kobject_put+0x120/0x150 cdev_put+0x20/0x3c __fput+0x2c4/0x2d8 ____fput+0x1c/0x38 task_work_run+0x70/0xfc do_exit+0x2a0/0x924 do_group_exit+0x34/0x90 get_signal+0x7fc/0x8c0 do_signal+0x128/0x13b4 do_notify_resume+0xdc/0x160 el0_svc+0xd4/0xf8 el0t_64_sync_handler+0x140/0x14c el0t_64_sync+0x190/0x194 ---[ end trace 0000000000000000 ]--- ...followed by more symptoms of corruption, with similar stacks: refcount_t: underflow; use-after-free. kernel BUG at lib/list_debug.c:62! Kernel panic - not syncing: Oops - BUG: Fatal exception This happens because pps_device_destruct() frees the pps_device with the embedded cdev immediately after calling cdev_del(), but, as the comment above cdev_del() notes, fops for previously opened cdevs are still callable even after cdev_del() returns. I think this bug has always been there: I can't explain why it suddenly started happening every time I reboot this particular board. In commit d953e0e837e6 ("pps: Fix a use-after free bug when unregistering a source."), George Spelvin suggested removing the embedded cdev. That seems like the simplest way to fix this, so I've implemented his suggestion, using __register_chrdev() with pps_idr becoming the source of truth for which minor corresponds to which device. But now that pps_idr defines userspace visibility instead of cdev_add(), we need to be sure the pps->dev refcount can't reach zero while userspace can still find it again. So, the idr_remove() call moves to pps_unregister_cdev(), and pps_idr now holds a reference to pps->dev. pps_core: source serial1 got cdev (251:1) <...> pps pps1: removed pps_core: unregistering pps1 pps_core: deallocating pps1
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-02-27 18:14 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: d953e0e837e65ecc1ddaa4f9560f7925878a0de6 , < 785c78ed0d39d1717cca3ef931d3e51337b5e90e (git)
Affected: d953e0e837e65ecc1ddaa4f9560f7925878a0de6 , < 1a7735ab2cb9747518a7416fb5929e85442dec62 (git)
Affected: d953e0e837e65ecc1ddaa4f9560f7925878a0de6 , < c4041b6b0a7a3def8cf3f3d6120ff337bc4c40f7 (git)
Affected: d953e0e837e65ecc1ddaa4f9560f7925878a0de6 , < 91932db1d96b2952299ce30c1c693d834d10ace6 (git)
Affected: d953e0e837e65ecc1ddaa4f9560f7925878a0de6 , < cd3bbcb6b3a7caa5ce67de76723b6d8531fb7f64 (git)
Affected: d953e0e837e65ecc1ddaa4f9560f7925878a0de6 , < 7e5ee3281dc09014367f5112b6d566ba36ea2d49 (git)
Affected: d953e0e837e65ecc1ddaa4f9560f7925878a0de6 , < 85241f7de216f8298f6e48540ea13d7dcd100870 (git)
Affected: d953e0e837e65ecc1ddaa4f9560f7925878a0de6 , < c79a39dc8d060b9e64e8b0fa9d245d44befeefbe (git)
Affected: 77327a71f9841b7dfa708195d1cb133d4ef4a989 (git)
Affected: cd59fb14918a6b20c1ac8be121fa6397b97b00cb (git)
Affected: 49626fbb0360332e40fd76a48cb2ba876d6134ad (git)
Affected: 3.2.40 , < 3.3 (semver)
Affected: 3.4.87 , < 3.5 (semver)
Affected: 3.8.1 , < 3.9 (semver)
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Linux Linux Affected: 3.9
Unaffected: 0 , < 3.9 (semver)
Unaffected: 5.4.291 , ≤ 5.4.* (semver)
Unaffected: 5.10.235 , ≤ 5.10.* (semver)
Unaffected: 5.15.179 , ≤ 5.15.* (semver)
Unaffected: 6.1.129 , ≤ 6.1.* (semver)
Unaffected: 6.6.76 , ≤ 6.6.* (semver)
Unaffected: 6.12.13 , ≤ 6.12.* (semver)
Unaffected: 6.13.2 , ≤ 6.13.* (semver)
Unaffected: 6.14 , ≤ * (original_commit_for_fix)
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Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.6 , < * (custom)
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Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP Affected: V3.1.6 , < * (custom)
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Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem Affected: 0 , < * (custom)
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Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.6 , < * (custom)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npps: Fix a use-after-free\n\nOn a board running ntpd and gpsd, I\u0027m seeing a consistent use-after-free\nin sys_exit() from gpsd when rebooting:\n\n    pps pps1: removed\n    ------------[ cut here ]------------\n    kobject: \u0027(null)\u0027 (00000000db4bec24): is not initialized, yet kobject_put() is being called.\n    WARNING: CPU: 2 PID: 440 at lib/kobject.c:734 kobject_put+0x120/0x150\n    CPU: 2 UID: 299 PID: 440 Comm: gpsd Not tainted 6.11.0-rc6-00308-gb31c44928842 #1\n    Hardware name: Raspberry Pi 4 Model B Rev 1.1 (DT)\n    pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n    pc : kobject_put+0x120/0x150\n    lr : kobject_put+0x120/0x150\n    sp : ffffffc0803d3ae0\n    x29: ffffffc0803d3ae0 x28: ffffff8042dc9738 x27: 0000000000000001\n    x26: 0000000000000000 x25: ffffff8042dc9040 x24: ffffff8042dc9440\n    x23: ffffff80402a4620 x22: ffffff8042ef4bd0 x21: ffffff80405cb600\n    x20: 000000000008001b x19: ffffff8040b3b6e0 x18: 0000000000000000\n    x17: 0000000000000000 x16: 0000000000000000 x15: 696e6920746f6e20\n    x14: 7369203a29343263 x13: 205d303434542020 x12: 0000000000000000\n    x11: 0000000000000000 x10: 0000000000000000 x9 : 0000000000000000\n    x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000\n    x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000000\n    x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000\n    Call trace:\n     kobject_put+0x120/0x150\n     cdev_put+0x20/0x3c\n     __fput+0x2c4/0x2d8\n     ____fput+0x1c/0x38\n     task_work_run+0x70/0xfc\n     do_exit+0x2a0/0x924\n     do_group_exit+0x34/0x90\n     get_signal+0x7fc/0x8c0\n     do_signal+0x128/0x13b4\n     do_notify_resume+0xdc/0x160\n     el0_svc+0xd4/0xf8\n     el0t_64_sync_handler+0x140/0x14c\n     el0t_64_sync+0x190/0x194\n    ---[ end trace 0000000000000000 ]---\n\n...followed by more symptoms of corruption, with similar stacks:\n\n    refcount_t: underflow; use-after-free.\n    kernel BUG at lib/list_debug.c:62!\n    Kernel panic - not syncing: Oops - BUG: Fatal exception\n\nThis happens because pps_device_destruct() frees the pps_device with the\nembedded cdev immediately after calling cdev_del(), but, as the comment\nabove cdev_del() notes, fops for previously opened cdevs are still\ncallable even after cdev_del() returns. I think this bug has always\nbeen there: I can\u0027t explain why it suddenly started happening every time\nI reboot this particular board.\n\nIn commit d953e0e837e6 (\"pps: Fix a use-after free bug when\nunregistering a source.\"), George Spelvin suggested removing the\nembedded cdev. That seems like the simplest way to fix this, so I\u0027ve\nimplemented his suggestion, using __register_chrdev() with pps_idr\nbecoming the source of truth for which minor corresponds to which\ndevice.\n\nBut now that pps_idr defines userspace visibility instead of cdev_add(),\nwe need to be sure the pps-\u003edev refcount can\u0027t reach zero while\nuserspace can still find it again. So, the idr_remove() call moves to\npps_unregister_cdev(), and pps_idr now holds a reference to pps-\u003edev.\n\n    pps_core: source serial1 got cdev (251:1)\n    \u003c...\u003e\n    pps pps1: removed\n    pps_core: unregistering pps1\n    pps_core: deallocating pps1"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerability is reached through local file descriptor operations \u2014 a TIOCSETD ioctl on a tty/pty to register and unregister the PPS source, plus open()/close() on the /dev/ppsN character device. No network or remote input is involved.\nAC:L - The attacker controls every step of the sequence (create pty, set N_PPS ldisc, open /dev/ppsN, tear down the ldisc, close the fd), and the use-after-free in __fput()\u0027s cdev_put() follows deterministically from that ordering with no race the attacker cannot control. The reporter observed it reproduce consistently on every reboot, and the sequence can be repeated indefinitely to groom the heap.\nPR:L - No capability is checked anywhere on the path \u2014 TIOCSETD/N_PPS requires no privilege, pps_cdev_open()/pps_cdev_release() have no capable() call, and only PPS_SETPARAMS/PPS_KC_BIND need CAP_SYS_TIME. An unprivileged local account with access to /dev/ppsN (granted by the standard udev rules shipped on the GPS/NTP, telecom and industrial timing systems where PPS is deployed, so gpsd/chrony/ntpsec can run non-root) can drive the entire sequence.\nUI:N - The attacker performs all steps itself from a single process using its own pty and its own file descriptors; no action by any other user or administrator is required.\nS:U - The freed object, the corrupted memory, and the resulting code execution all reside in the kernel of the same host \u2014 this is a standard local privilege-escalation primitive with no crossing of a VM, IOMMU, or sandbox authority boundary.\nC:H - The use-after-free lets the attacker reclaim the freed struct pps_device from a generic kmalloc cache and have the kernel dereference attacker-supplied pointers from it (cdev-\u003eowner, kobj-\u003ektype, kobj-\u003ename), yielding an arbitrary kernel read primitive and full disclosure of kernel memory.\nI:H - kobject_cleanup() performs an indirect call through t-\u003erelease read out of the freed object, and cdev_purge() does list_del_init() on freed list heads \u2014 giving an arbitrary function-pointer call, an arbitrary unlink write, and an arbitrary kfree(), all sufficient for control-flow hijacking and privilege escalation.\nA:H - Even without exploitation the bug reliably corrupts the kernel \u2014 the reporter documented kobject_put() warnings, \"refcount_t: underflow; use-after-free\", \"kernel BUG at lib/list_debug.c:62\" and \"Kernel panic - not syncing: Oops - BUG: Fatal exception\", a complete denial of service triggerable at will."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T11:47:07.328Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/785c78ed0d39d1717cca3ef931d3e51337b5e90e"
        },
        {
          "url": "https://git.kernel.org/stable/c/1a7735ab2cb9747518a7416fb5929e85442dec62"
        },
        {
          "url": "https://git.kernel.org/stable/c/c4041b6b0a7a3def8cf3f3d6120ff337bc4c40f7"
        },
        {
          "url": "https://git.kernel.org/stable/c/91932db1d96b2952299ce30c1c693d834d10ace6"
        },
        {
          "url": "https://git.kernel.org/stable/c/cd3bbcb6b3a7caa5ce67de76723b6d8531fb7f64"
        },
        {
          "url": "https://git.kernel.org/stable/c/7e5ee3281dc09014367f5112b6d566ba36ea2d49"
        },
        {
          "url": "https://git.kernel.org/stable/c/85241f7de216f8298f6e48540ea13d7dcd100870"
        },
        {
          "url": "https://git.kernel.org/stable/c/c79a39dc8d060b9e64e8b0fa9d245d44befeefbe"
        }
      ],
      "title": "pps: Fix a use-after-free",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-57979",
    "datePublished": "2025-02-27T02:07:06.168Z",
    "dateReserved": "2025-02-27T02:04:28.912Z",
    "dateUpdated": "2026-08-05T11:47:07.328Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2024-57979",
      "date": "2026-08-14",
      "epss": "0.00256",
      "percentile": "0.17233"
    },
    "microsoft_vex": {
      "current_release_date": "2026-02-18T15:11:23.000Z",
      "cve": "CVE-2024-57979",
      "id": "msrc_CVE-2024-57979",
      "initial_release_date": "2025-02-02T00:00:00.000Z",
      "product_status:fixed": "3",
      "product_status:known_affected": "3",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "pps: Fix a use-after-free",
      "url": "https://msrc.microsoft.com/csaf/vex/2025/msrc_cve-2024-57979.json",
      "version": "2"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-57979\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-02-27T02:15:11.087\",\"lastModified\":\"2026-07-14T13:17:14.673\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\npps: Fix a use-after-free\\n\\nOn a board running ntpd and gpsd, I\u0027m seeing a consistent use-after-free\\nin sys_exit() from gpsd when rebooting:\\n\\n    pps pps1: removed\\n    ------------[ cut here ]------------\\n    kobject: \u0027(null)\u0027 (00000000db4bec24): is not initialized, yet kobject_put() is being called.\\n    WARNING: CPU: 2 PID: 440 at lib/kobject.c:734 kobject_put+0x120/0x150\\n    CPU: 2 UID: 299 PID: 440 Comm: gpsd Not tainted 6.11.0-rc6-00308-gb31c44928842 #1\\n    Hardware name: Raspberry Pi 4 Model B Rev 1.1 (DT)\\n    pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)\\n    pc : kobject_put+0x120/0x150\\n    lr : kobject_put+0x120/0x150\\n    sp : ffffffc0803d3ae0\\n    x29: ffffffc0803d3ae0 x28: ffffff8042dc9738 x27: 0000000000000001\\n    x26: 0000000000000000 x25: ffffff8042dc9040 x24: ffffff8042dc9440\\n    x23: ffffff80402a4620 x22: ffffff8042ef4bd0 x21: ffffff80405cb600\\n    x20: 000000000008001b x19: ffffff8040b3b6e0 x18: 0000000000000000\\n    x17: 0000000000000000 x16: 0000000000000000 x15: 696e6920746f6e20\\n    x14: 7369203a29343263 x13: 205d303434542020 x12: 0000000000000000\\n    x11: 0000000000000000 x10: 0000000000000000 x9 : 0000000000000000\\n    x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000\\n    x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000000\\n    x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000\\n    Call trace:\\n     kobject_put+0x120/0x150\\n     cdev_put+0x20/0x3c\\n     __fput+0x2c4/0x2d8\\n     ____fput+0x1c/0x38\\n     task_work_run+0x70/0xfc\\n     do_exit+0x2a0/0x924\\n     do_group_exit+0x34/0x90\\n     get_signal+0x7fc/0x8c0\\n     do_signal+0x128/0x13b4\\n     do_notify_resume+0xdc/0x160\\n     el0_svc+0xd4/0xf8\\n     el0t_64_sync_handler+0x140/0x14c\\n     el0t_64_sync+0x190/0x194\\n    ---[ end trace 0000000000000000 ]---\\n\\n...followed by more symptoms of corruption, with similar stacks:\\n\\n    refcount_t: underflow; use-after-free.\\n    kernel BUG at lib/list_debug.c:62!\\n    Kernel panic - not syncing: Oops - BUG: Fatal exception\\n\\nThis happens because pps_device_destruct() frees the pps_device with the\\nembedded cdev immediately after calling cdev_del(), but, as the comment\\nabove cdev_del() notes, fops for previously opened cdevs are still\\ncallable even after cdev_del() returns. I think this bug has always\\nbeen there: I can\u0027t explain why it suddenly started happening every time\\nI reboot this particular board.\\n\\nIn commit d953e0e837e6 (\\\"pps: Fix a use-after free bug when\\nunregistering a source.\\\"), George Spelvin suggested removing the\\nembedded cdev. That seems like the simplest way to fix this, so I\u0027ve\\nimplemented his suggestion, using __register_chrdev() with pps_idr\\nbecoming the source of truth for which minor corresponds to which\\ndevice.\\n\\nBut now that pps_idr defines userspace visibility instead of cdev_add(),\\nwe need to be sure the pps-\u003edev refcount can\u0027t reach zero while\\nuserspace can still find it again. So, the idr_remove() call moves to\\npps_unregister_cdev(), and pps_idr now holds a reference to pps-\u003edev.\\n\\n    pps_core: source serial1 got cdev (251:1)\\n    \u003c...\u003e\\n    pps pps1: removed\\n    pps_core: unregistering pps1\\n    pps_core: deallocating pps1\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: pps: Se corrige un error de use after free. En una placa que ejecuta ntpd y gpsd, veo un error de use after free constante en sys_exit() desde gpsd al reiniciar: pps pps1: eliminado ------------[ cortar aqu\u00ed ]------------ kobject: \u0027(null)\u0027 (00000000db4bec24): is not initialized, yet kobject_put() is being called. WARNING: CPU: 2 PID: 440 at lib/kobject.c:734 kobject_put+0x120/0x150 CPU: 2 UID: 299 PID: 440 Comm: gpsd Not tainted 6.11.0-rc6-00308-gb31c44928842 #1 Hardware name: Raspberry Pi 4 Model B Rev 1.1 (DT) pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : kobject_put+0x120/0x150 lr : kobject_put+0x120/0x150 sp : ffffffc0803d3ae0 x29: ffffffc0803d3ae0 x28: ffffff8042dc9738 x27: 0000000000000001 x26: 0000000000000000 x25: ffffff8042dc9040 x24: ffffff8042dc9440 x23: ffffff80402a4620 x22: ffffff8042ef4bd0 x21: ffffff80405cb600 x20: 000000000008001b x19: ffffff8040b3b6e0 x18: 0000000000000000 x17: 0000000000000000 x16: 0000000000000000 x15: 696e6920746f6e20 x14: 7369203a29343263 x13: 205d303434542020 x12: 0000000000000000 x11: 0000000000000000 x10: 0000000000000000 x9 : 0000000000000000 x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000000 x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: kobject_put+0x120/0x150 cdev_put+0x20/0x3c __fput+0x2c4/0x2d8 ____fput+0x1c/0x38 task_work_run+0x70/0xfc do_exit+0x2a0/0x924 do_group_exit+0x34/0x90 get_signal+0x7fc/0x8c0 do_signal+0x128/0x13b4 do_notify_resume+0xdc/0x160 el0_svc+0xd4/0xf8 el0t_64_sync_handler+0x140/0x14c el0t_64_sync+0x190/0x194 ---[ end trace 0000000000000000 ]--- ...seguido de m\u00e1s s\u00edntomas de corrupci\u00f3n, con pilas similares: refcount_t: desbordamiento; use after free. \u00a1ERROR del kernel en lib/list_debug.c:62! P\u00e1nico del kernel - no sincroniza: Vaya - ERROR: Excepci\u00f3n fatal Esto sucede porque pps_device_destruct() libera el pps_device con el cdev integrado inmediatamente despu\u00e9s de llamar a cdev_del(), pero, como se\u00f1ala el comentario anterior a cdev_del(), los fops para cdevs abiertos previamente a\u00fan se pueden llamar incluso despu\u00e9s de que cdev_del() regrese. Creo que este error siempre ha estado ah\u00ed: no puedo explicar por qu\u00e9 de repente empez\u00f3 a suceder cada vez que reinicio esta placa en particular. En el commit d953e0e837e6 (\\\"pps: Arreglar un error de use after free al anular el registro de una fuente\\\"), George Spelvin sugiri\u00f3 eliminar el cdev integrado. Esa parece la forma m\u00e1s sencilla de solucionarlo, as\u00ed que he implementado su sugerencia, utilizando __register_chrdev() con pps_idr convirti\u00e9ndose en la fuente de verdad para la cual el menor corresponde a qu\u00e9 dispositivo. Pero ahora que pps_idr define la visibilidad del espacio de usuario en lugar de cdev_add(), debemos asegurarnos de que el recuento de referencias pps-\u0026gt;dev no pueda llegar a cero mientras que el espacio de usuario a\u00fan pueda encontrarlo de nuevo. Entonces, la llamada idr_remove() se mueve a pps_unregister_cdev(), y pps_idr ahora contiene una referencia a pps-\u0026gt;dev. pps_core: la fuente serial1 obtuvo cdev (251:1) \u0026lt;...\u0026gt; pps pps1: eliminado pps_core: anulando el registro de pps1 pps_core: desasignando pps1\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/pps/clients/pps-gpio.c\",\"drivers/pps/clients/pps-ktimer.c\",\"drivers/pps/clients/pps-ldisc.c\",\"drivers/pps/clients/pps_parport.c\",\"drivers/pps/kapi.c\",\"drivers/pps/kc.c\",\"drivers/pps/pps.c\",\"drivers/ptp/ptp_ocp.c\",\"include/linux/pps_kernel.h\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"d953e0e837e65ecc1ddaa4f9560f7925878a0de6\",\"lessThan\":\"785c78ed0d39d1717cca3ef931d3e51337b5e90e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d953e0e837e65ecc1ddaa4f9560f7925878a0de6\",\"lessThan\":\"1a7735ab2cb9747518a7416fb5929e85442dec62\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d953e0e837e65ecc1ddaa4f9560f7925878a0de6\",\"lessThan\":\"c4041b6b0a7a3def8cf3f3d6120ff337bc4c40f7\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d953e0e837e65ecc1ddaa4f9560f7925878a0de6\",\"lessThan\":\"91932db1d96b2952299ce30c1c693d834d10ace6\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d953e0e837e65ecc1ddaa4f9560f7925878a0de6\",\"lessThan\":\"cd3bbcb6b3a7caa5ce67de76723b6d8531fb7f64\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d953e0e837e65ecc1ddaa4f9560f7925878a0de6\",\"lessThan\":\"7e5ee3281dc09014367f5112b6d566ba36ea2d49\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d953e0e837e65ecc1ddaa4f9560f7925878a0de6\",\"lessThan\":\"85241f7de216f8298f6e48540ea13d7dcd100870\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d953e0e837e65ecc1ddaa4f9560f7925878a0de6\",\"lessThan\":\"c79a39dc8d060b9e64e8b0fa9d245d44befeefbe\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"77327a71f9841b7dfa708195d1cb133d4ef4a989\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"cd59fb14918a6b20c1ac8be121fa6397b97b00cb\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"49626fbb0360332e40fd76a48cb2ba876d6134ad\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3.2.40\",\"lessThan\":\"3.3\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"3.4.87\",\"lessThan\":\"3.5\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"3.8.1\",\"lessThan\":\"3.9\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/pps/clients/pps-gpio.c\",\"drivers/pps/clients/pps-ktimer.c\",\"drivers/pps/clients/pps-ldisc.c\",\"drivers/pps/clients/pps_parport.c\",\"drivers/pps/kapi.c\",\"drivers/pps/kc.c\",\"drivers/pps/pps.c\",\"drivers/ptp/ptp_ocp.c\",\"include/linux/pps_kernel.h\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3.9\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"3.9\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.4.291\",\"lessThanOrEqual\":\"5.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.235\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.179\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.129\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.76\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.13\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.13.2\",\"lessThanOrEqual\":\"6.13.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.14\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]},{\"source\":\"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\",\"affectedData\":[{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 TM MFP - GNU/Linux subsystem\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIPLUS S7-1500 CPU 1518-4 PN/DP 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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-29T22:59:25+00:00",
      "cve": "CVE-2024-57979",
      "id": "CVE-2024-57979",
      "initial_release_date": "2024-01-01T00:00:00+00:00",
      "product_status:fixed": "150",
      "product_status:known_affected": "226",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: pps: Fix a use-after-free",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-57979.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-07-25T01:13:07Z",
      "cve": "CVE-2024-57979",
      "id": "CVE-2024-57979",
      "initial_release_date": "2025-02-28T02:23:34Z",
      "product_status:known_affected": "589",
      "product_status:known_not_affected": "101",
      "product_status:recommended": "422",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2024-57979",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2024-57979.json",
      "version": "58"
    },
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No network or remote input is involved.\\nAC:L - The attacker controls every step of the sequence (create pty, set N_PPS ldisc, open /dev/ppsN, tear down the ldisc, close the fd), and the use-after-free in __fput()\u0027s cdev_put() follows deterministically from that ordering with no race the attacker cannot control. The reporter observed it reproduce consistently on every reboot, and the sequence can be repeated indefinitely to groom the heap.\\nPR:L - No capability is checked anywhere on the path \\u2014 TIOCSETD/N_PPS requires no privilege, pps_cdev_open()/pps_cdev_release() have no capable() call, and only PPS_SETPARAMS/PPS_KC_BIND need CAP_SYS_TIME. An unprivileged local account with access to /dev/ppsN (granted by the standard udev rules shipped on the GPS/NTP, telecom and industrial timing systems where PPS is deployed, so gpsd/chrony/ntpsec can run non-root) can drive the entire sequence.\\nUI:N - The attacker performs all steps itself from a single process using its own pty and its own file descriptors; no action by any other user or administrator is required.\\nS:U - The freed object, the corrupted memory, and the resulting code execution all reside in the kernel of the same host \\u2014 this is a standard local privilege-escalation primitive with no crossing of a VM, IOMMU, or sandbox authority boundary.\\nC:H - The use-after-free lets the attacker reclaim the freed struct pps_device from a generic kmalloc cache and have the kernel dereference attacker-supplied pointers from it (cdev-\u003eowner, kobj-\u003ektype, kobj-\u003ename), yielding an arbitrary kernel read primitive and full disclosure of kernel memory.\\nI:H - kobject_cleanup() performs an indirect call through t-\u003erelease read out of the freed object, and cdev_purge() does list_del_init() on freed list heads \\u2014 giving an arbitrary function-pointer call, an arbitrary unlink write, and an arbitrary kfree(), all sufficient for control-flow hijacking and privilege escalation.\\nA:H - Even without exploitation the bug reliably corrupts the kernel \\u2014 the reporter documented kobject_put() warnings, \\\"refcount_t: underflow; use-after-free\\\", \\\"kernel BUG at lib/list_debug.c:62\\\" and \\\"Kernel panic - not syncing: Oops - BUG: Fatal exception\\\", a complete denial of service triggerable at will.\"}]}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"d953e0e837e65ecc1ddaa4f9560f7925878a0de6\", \"lessThan\": \"785c78ed0d39d1717cca3ef931d3e51337b5e90e\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d953e0e837e65ecc1ddaa4f9560f7925878a0de6\", \"lessThan\": \"1a7735ab2cb9747518a7416fb5929e85442dec62\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d953e0e837e65ecc1ddaa4f9560f7925878a0de6\", \"lessThan\": \"c4041b6b0a7a3def8cf3f3d6120ff337bc4c40f7\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d953e0e837e65ecc1ddaa4f9560f7925878a0de6\", \"lessThan\": \"91932db1d96b2952299ce30c1c693d834d10ace6\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d953e0e837e65ecc1ddaa4f9560f7925878a0de6\", \"lessThan\": \"cd3bbcb6b3a7caa5ce67de76723b6d8531fb7f64\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d953e0e837e65ecc1ddaa4f9560f7925878a0de6\", \"lessThan\": \"7e5ee3281dc09014367f5112b6d566ba36ea2d49\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d953e0e837e65ecc1ddaa4f9560f7925878a0de6\", \"lessThan\": \"85241f7de216f8298f6e48540ea13d7dcd100870\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d953e0e837e65ecc1ddaa4f9560f7925878a0de6\", \"lessThan\": \"c79a39dc8d060b9e64e8b0fa9d245d44befeefbe\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"77327a71f9841b7dfa708195d1cb133d4ef4a989\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"cd59fb14918a6b20c1ac8be121fa6397b97b00cb\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"49626fbb0360332e40fd76a48cb2ba876d6134ad\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"3.2.40\", \"lessThan\": \"3.3\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"3.4.87\", \"lessThan\": \"3.5\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"3.8.1\", \"lessThan\": \"3.9\", \"versionType\": \"semver\"}], \"programFiles\": [\"drivers/pps/clients/pps-gpio.c\", \"drivers/pps/clients/pps-ktimer.c\", \"drivers/pps/clients/pps-ldisc.c\", \"drivers/pps/clients/pps_parport.c\", \"drivers/pps/kapi.c\", \"drivers/pps/kc.c\", \"drivers/pps/pps.c\", \"drivers/ptp/ptp_ocp.c\", \"include/linux/pps_kernel.h\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"3.9\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"3.9\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.4.291\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.235\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.179\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.129\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.76\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12.13\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.12.*\"}, {\"status\": \"unaffected\", \"version\": \"6.13.2\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.13.*\"}, {\"status\": \"unaffected\", \"version\": \"6.14\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/pps/clients/pps-gpio.c\", \"drivers/pps/clients/pps-ktimer.c\", \"drivers/pps/clients/pps-ldisc.c\", \"drivers/pps/clients/pps_parport.c\", \"drivers/pps/kapi.c\", \"drivers/pps/kc.c\", \"drivers/pps/pps.c\", \"drivers/ptp/ptp_ocp.c\", \"include/linux/pps_kernel.h\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/785c78ed0d39d1717cca3ef931d3e51337b5e90e\"}, {\"url\": \"https://git.kernel.org/stable/c/1a7735ab2cb9747518a7416fb5929e85442dec62\"}, {\"url\": \"https://git.kernel.org/stable/c/c4041b6b0a7a3def8cf3f3d6120ff337bc4c40f7\"}, {\"url\": \"https://git.kernel.org/stable/c/91932db1d96b2952299ce30c1c693d834d10ace6\"}, {\"url\": \"https://git.kernel.org/stable/c/cd3bbcb6b3a7caa5ce67de76723b6d8531fb7f64\"}, {\"url\": \"https://git.kernel.org/stable/c/7e5ee3281dc09014367f5112b6d566ba36ea2d49\"}, {\"url\": \"https://git.kernel.org/stable/c/85241f7de216f8298f6e48540ea13d7dcd100870\"}, {\"url\": \"https://git.kernel.org/stable/c/c79a39dc8d060b9e64e8b0fa9d245d44befeefbe\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\npps: Fix a use-after-free\\n\\nOn a board running ntpd and gpsd, I\u0027m seeing a consistent use-after-free\\nin sys_exit() from gpsd when rebooting:\\n\\n    pps pps1: removed\\n    ------------[ cut here ]------------\\n    kobject: \u0027(null)\u0027 (00000000db4bec24): is not initialized, yet kobject_put() is being called.\\n    WARNING: CPU: 2 PID: 440 at lib/kobject.c:734 kobject_put+0x120/0x150\\n    CPU: 2 UID: 299 PID: 440 Comm: gpsd Not tainted 6.11.0-rc6-00308-gb31c44928842 #1\\n    Hardware name: Raspberry Pi 4 Model B Rev 1.1 (DT)\\n    pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)\\n    pc : kobject_put+0x120/0x150\\n    lr : kobject_put+0x120/0x150\\n    sp : ffffffc0803d3ae0\\n    x29: ffffffc0803d3ae0 x28: ffffff8042dc9738 x27: 0000000000000001\\n    x26: 0000000000000000 x25: ffffff8042dc9040 x24: ffffff8042dc9440\\n    x23: ffffff80402a4620 x22: ffffff8042ef4bd0 x21: ffffff80405cb600\\n    x20: 000000000008001b x19: ffffff8040b3b6e0 x18: 0000000000000000\\n    x17: 0000000000000000 x16: 0000000000000000 x15: 696e6920746f6e20\\n    x14: 7369203a29343263 x13: 205d303434542020 x12: 0000000000000000\\n    x11: 0000000000000000 x10: 0000000000000000 x9 : 0000000000000000\\n    x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000\\n    x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000000\\n    x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000\\n    Call trace:\\n     kobject_put+0x120/0x150\\n     cdev_put+0x20/0x3c\\n     __fput+0x2c4/0x2d8\\n     ____fput+0x1c/0x38\\n     task_work_run+0x70/0xfc\\n     do_exit+0x2a0/0x924\\n     do_group_exit+0x34/0x90\\n     get_signal+0x7fc/0x8c0\\n     do_signal+0x128/0x13b4\\n     do_notify_resume+0xdc/0x160\\n     el0_svc+0xd4/0xf8\\n     el0t_64_sync_handler+0x140/0x14c\\n     el0t_64_sync+0x190/0x194\\n    ---[ end trace 0000000000000000 ]---\\n\\n...followed by more symptoms of corruption, with similar stacks:\\n\\n    refcount_t: underflow; use-after-free.\\n    kernel BUG at lib/list_debug.c:62!\\n    Kernel panic - not syncing: Oops - BUG: Fatal exception\\n\\nThis happens because pps_device_destruct() frees the pps_device with the\\nembedded cdev immediately after calling cdev_del(), but, as the comment\\nabove cdev_del() notes, fops for previously opened cdevs are still\\ncallable even after cdev_del() returns. I think this bug has always\\nbeen there: I can\u0027t explain why it suddenly started happening every time\\nI reboot this particular board.\\n\\nIn commit d953e0e837e6 (\\\"pps: Fix a use-after free bug when\\nunregistering a source.\\\"), George Spelvin suggested removing the\\nembedded cdev. That seems like the simplest way to fix this, so I\u0027ve\\nimplemented his suggestion, using __register_chrdev() with pps_idr\\nbecoming the source of truth for which minor corresponds to which\\ndevice.\\n\\nBut now that pps_idr defines userspace visibility instead of cdev_add(),\\nwe need to be sure the pps-\u003edev refcount can\u0027t reach zero while\\nuserspace can still find it again. So, the idr_remove() call moves to\\npps_unregister_cdev(), and pps_idr now holds a reference to pps-\u003edev.\\n\\n    pps_core: source serial1 got cdev (251:1)\\n    \u003c...\u003e\\n    pps pps1: removed\\n    pps_core: unregistering pps1\\n    pps_core: deallocating pps1\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.291\", \"versionStartIncluding\": \"3.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.235\", \"versionStartIncluding\": \"3.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.179\", \"versionStartIncluding\": \"3.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.129\", \"versionStartIncluding\": \"3.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.76\", \"versionStartIncluding\": \"3.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.13\", \"versionStartIncluding\": \"3.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.13.2\", \"versionStartIncluding\": \"3.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.14\", \"versionStartIncluding\": \"3.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"3.2.40\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"3.4.87\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"3.8.1\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T11:47:07.328Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-57979\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-05T11:47:07.328Z\", \"dateReserved\": \"2025-02-27T02:04:28.912Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-02-27T02:07:06.168Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.