Vulnerability-Lookup

GHSA-VWGF-GFHW-H447

Vulnerability from github – Published: 2022-05-24 17:42 – Updated: 2022-06-02 00:00

Details

A use-after-free flaw was found in the io_uring in Linux kernel, where a local attacker with a user privilege could cause a denial of service problem on the system The issue results from the lack of validating the existence of an object prior to performing operations on the object by not incrementing the file reference counter while in use. The highest threat from this vulnerability is to data integrity, confidentiality and system availability.

Severity

7.8 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2021-20226"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2021-02-23T17:15:00Z",
    "severity": "HIGH"
  },
  "details": "A use-after-free flaw was found in the io_uring in Linux kernel, where a local attacker with a user privilege could cause a denial of service problem on the system The issue results from the lack of validating the existence of an object prior to performing operations on the object by not incrementing the file reference counter while in use. The highest threat from this vulnerability is to data integrity, confidentiality and system availability.",
  "id": "GHSA-vwgf-gfhw-h447",
  "modified": "2022-06-02T00:00:24Z",
  "published": "2022-05-24T17:42:54Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-20226"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1873476"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20210401-0001"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-VWJX-575R-P4W6

Vulnerability from github – Published: 2022-05-14 03:56 – Updated: 2022-05-14 03:56

Details

A use after free in PDFium in Google Chrome prior to 55.0.2883.75 for Mac, Windows and Linux, and 55.0.2883.84 for Android allowed a remote attacker to perform an out of bounds memory read via a crafted PDF file.

Severity

6.3 (Medium)


                  
                    CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

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{
  "affected": [],
  "aliases": [
    "CVE-2016-5216"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2017-01-19T05:59:00Z",
    "severity": "MODERATE"
  },
  "details": "A use after free in PDFium in Google Chrome prior to 55.0.2883.75 for Mac, Windows and Linux, and 55.0.2883.84 for Android allowed a remote attacker to perform an out of bounds memory read via a crafted PDF file.",
  "id": "GHSA-vwjx-575r-p4w6",
  "modified": "2022-05-14T03:56:36Z",
  "published": "2022-05-14T03:56:36Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2016-5216"
    },
    {
      "type": "WEB",
      "url": "https://chromereleases.googleblog.com/2016/12/stable-channel-update-for-desktop.html"
    },
    {
      "type": "WEB",
      "url": "https://crbug.com/653090"
    },
    {
      "type": "WEB",
      "url": "http://rhn.redhat.com/errata/RHSA-2016-2919.html"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/94633"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-VWM2-FVJJ-VCV3

Vulnerability from github – Published: 2025-01-20 15:31 – Updated: 2026-07-14 15:31

Details

In the Linux kernel, the following vulnerability has been resolved:

io_uring/eventfd: ensure io_eventfd_signal() defers another RCU period

io_eventfd_do_signal() is invoked from an RCU callback, but when dropping the reference to the io_ev_fd, it calls io_eventfd_free() directly if the refcount drops to zero. This isn't correct, as any potential freeing of the io_ev_fd should be deferred another RCU grace period.

Just call io_eventfd_put() rather than open-code the dec-and-test and free, which will correctly defer it another RCU grace period.

Severity

4.7 (Medium)


                  
                    CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2025-21655"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-01-20T14:15:27Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/eventfd: ensure io_eventfd_signal() defers another RCU period\n\nio_eventfd_do_signal() is invoked from an RCU callback, but when\ndropping the reference to the io_ev_fd, it calls io_eventfd_free()\ndirectly if the refcount drops to zero. This isn\u0027t correct, as any\npotential freeing of the io_ev_fd should be deferred another RCU grace\nperiod.\n\nJust call io_eventfd_put() rather than open-code the dec-and-test and\nfree, which will correctly defer it another RCU grace period.",
  "id": "GHSA-vwm2-fvjj-vcv3",
  "modified": "2026-07-14T15:31:16Z",
  "published": "2025-01-20T15:31:24Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-21655"
    },
    {
      "type": "WEB",
      "url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6b63308c28987c6010b1180c72a6db4df6c68033"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8efff2aa2d95dc437ab67c5b4a9f1d3f367baa10"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a7085c3ae43b86d4b3d1b8275e6a67f14257e3b7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c9a40292a44e78f71258b8522655bffaf5753bdb"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"
    },
    {
      "type": "WEB",
      "url": "https://project-zero.issues.chromium.org/issues/388499293"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-VWM4-62GF-X745

Vulnerability from github – Published: 2026-06-19 20:47 – Updated: 2026-06-19 20:47

Summary

Oj: Use-After-Free in Oj::Parser array_class/hash_class GC Marking

Details

Summary

Oj::Parser in usual mode does not mark array_class and hash_class references during garbage collection. If GC runs after the class is assigned but before a parse, the class object is reclaimed, leaving the parser holding a dangling VALUE. The subsequent parse call dereferences the freed object, producing a segfault.

Version

Software: oj gem
Affected: all versions with ext/oj/usual.c / ext/oj/parser.c
Latest tested: 3.17.1 (confirmed present)

Details

The parser_mark function in ext/oj/parser.c is registered as the GC mark callback for the parser's TypedData. If array_class (stored as d->array_class in the Usual struct) is not passed to rb_gc_mark, the GC does not know it is referenced and may collect it.

When close_array_class (usual.c:405) later calls rb_funcallv on the collected class VALUE, it accesses freed memory, crashing at RIP: 0x7f... / 0x0000000000000000.

Crash output:

array_class finalized
about to parse
[BUG] Segmentation fault at 0x0000000000000000
    close_array_class+0x194  /ext/oj/usual.c:405
    parse+0x17b3             /ext/oj/parser.c:715
    parser_parse+0x10b       /ext/oj/parser.c:1408
RIP: 0x7fd1b46d68b7  RBP: 0x0000000000000000

Reproduce

require 'oj'
p = Oj::Parser.new(:usual,
  array_class: (ac = Class.new { def <<(_x); end }))
ObjectSpace.define_finalizer(ac, proc { warn 'array_class finalized' })
ac = nil
GC.start(full_mark: true, immediate_sweep: true)  # collect the class
p.parse('[1]')  # segfault

Severity

8.7 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c 3.17.2"
      },
      "package": {
        "ecosystem": "RubyGems",
        "name": "oj"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.17.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-54901"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-19T20:47:25Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "### Summary\n\n`Oj::Parser` in usual mode does not mark `array_class` and `hash_class` references during garbage collection. If GC runs after the class is assigned but before a parse, the class object is reclaimed, leaving the parser holding a dangling VALUE. The subsequent `parse` call dereferences the freed object, producing a segfault.\n\n### Version\n\n- **Software**: oj gem\n- **Affected**: all versions with `ext/oj/usual.c` / `ext/oj/parser.c`\n- **Latest tested**: 3.17.1 (confirmed present)\n\n### Details\n\nThe `parser_mark` function in `ext/oj/parser.c` is registered as the GC mark callback for the parser\u0027s `TypedData`. If `array_class` (stored as `d-\u003earray_class` in the `Usual` struct) is not passed to `rb_gc_mark`, the GC does not know it is referenced and may collect it.\n\nWhen `close_array_class` (`usual.c:405`) later calls `rb_funcallv` on the collected class VALUE, it accesses freed memory, crashing at `RIP: 0x7f... / 0x0000000000000000`.\n\nCrash output:\n```\narray_class finalized\nabout to parse\n[BUG] Segmentation fault at 0x0000000000000000\n    close_array_class+0x194  /ext/oj/usual.c:405\n    parse+0x17b3             /ext/oj/parser.c:715\n    parser_parse+0x10b       /ext/oj/parser.c:1408\nRIP: 0x7fd1b46d68b7  RBP: 0x0000000000000000\n```\n\n### Reproduce\n\n```ruby\nrequire \u0027oj\u0027\np = Oj::Parser.new(:usual,\n  array_class: (ac = Class.new { def \u003c\u003c(_x); end }))\nObjectSpace.define_finalizer(ac, proc { warn \u0027array_class finalized\u0027 })\nac = nil\nGC.start(full_mark: true, immediate_sweep: true)  # collect the class\np.parse(\u0027[1]\u0027)  # segfault\n```",
  "id": "GHSA-vwm4-62gf-x745",
  "modified": "2026-06-19T20:47:25Z",
  "published": "2026-06-19T20:47:25Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/ohler55/oj/security/advisories/GHSA-vwm4-62gf-x745"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/ohler55/oj"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Oj: Use-After-Free in Oj::Parser array_class/hash_class GC Marking"
}

GHSA-VWMP-JPWW-475P

Vulnerability from github – Published: 2022-05-24 16:54 – Updated: 2022-05-24 16:54

Details

Adobe Acrobat and Reader versions, 2019.012.20035 and earlier, 2019.012.20035 and earlier, 2017.011.30142 and earlier, 2017.011.30143 and earlier, 2017.011.30142 and earlier, 2015.006.30497 and earlier, and 2015.006.30498 and earlier have an use after free vulnerability. Successful exploitation could lead to arbitrary code execution.

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{
  "affected": [],
  "aliases": [
    "CVE-2019-8055"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2019-08-20T21:15:00Z",
    "severity": "CRITICAL"
  },
  "details": "Adobe Acrobat and Reader versions, 2019.012.20035 and earlier, 2019.012.20035 and earlier, 2017.011.30142 and earlier, 2017.011.30143 and earlier, 2017.011.30142 and earlier, 2015.006.30497 and earlier, and 2015.006.30498 and earlier have an use after free vulnerability. Successful exploitation could lead to arbitrary code execution.",
  "id": "GHSA-vwmp-jpww-475p",
  "modified": "2022-05-24T16:54:15Z",
  "published": "2022-05-24T16:54:15Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-8055"
    },
    {
      "type": "WEB",
      "url": "https://helpx.adobe.com/security/products/acrobat/apsb19-41.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

GHSA-VWPW-P8HM-QH66

Vulnerability from github – Published: 2022-05-24 16:59 – Updated: 2022-05-24 16:59

Details

Adobe Acrobat and Reader versions , 2019.012.20040 and earlier, 2017.011.30148 and earlier, 2017.011.30148 and earlier, 2015.006.30503 and earlier, and 2015.006.30503 and earlier have an use after free vulnerability. Successful exploitation could lead to arbitrary code execution .

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{
  "affected": [],
  "aliases": [
    "CVE-2019-8208"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2019-10-17T21:15:00Z",
    "severity": "HIGH"
  },
  "details": "Adobe Acrobat and Reader versions , 2019.012.20040 and earlier, 2017.011.30148 and earlier, 2017.011.30148 and earlier, 2015.006.30503 and earlier, and 2015.006.30503 and earlier have an use after free vulnerability. Successful exploitation could lead to arbitrary code execution .",
  "id": "GHSA-vwpw-p8hm-qh66",
  "modified": "2022-05-24T16:59:23Z",
  "published": "2022-05-24T16:59:23Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-8208"
    },
    {
      "type": "WEB",
      "url": "https://helpx.adobe.com/security/products/acrobat/apsb19-49.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

GHSA-VWQX-W7G5-RMQM

Vulnerability from github – Published: 2022-05-24 17:41 – Updated: 2022-05-24 17:41

Details

An issue was discovered on LG mobile devices with Android OS 8.0, 8.1, 9.0, and 10 software. The USB laf gadget has a use-after-free. The LG ID is LVE-SMP-200031 (February 2021).

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{
  "affected": [],
  "aliases": [
    "CVE-2021-26689"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2021-02-04T06:15:00Z",
    "severity": "CRITICAL"
  },
  "details": "An issue was discovered on LG mobile devices with Android OS 8.0, 8.1, 9.0, and 10 software. The USB laf gadget has a use-after-free. The LG ID is LVE-SMP-200031 (February 2021).",
  "id": "GHSA-vwqx-w7g5-rmqm",
  "modified": "2022-05-24T17:41:09Z",
  "published": "2022-05-24T17:41:09Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-26689"
    },
    {
      "type": "WEB",
      "url": "https://lgsecurity.lge.com"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

GHSA-VWRR-994W-H832

Vulnerability from github – Published: 2026-06-24 12:30 – Updated: 2026-06-30 03:37

Details

In the Linux kernel, the following vulnerability has been resolved:

net: skbuff: fix missing zerocopy reference in pskb_carve helpers

pskb_carve_inside_header() and pskb_carve_inside_nonlinear() both copy the old skb_shared_info header into a new buffer via memcpy(), which includes the destructor_arg pointer (uarg) for MSG_ZEROCOPY skbs. Neither function calls net_zcopy_get() for the new shinfo, creating an unaccounted holder: every skb_shared_info with destructor_arg set will call skb_zcopy_clear() once when freed, but the corresponding net_zcopy_get() was never called for the new copy. Repeated calls drive uarg->refcnt to zero prematurely, freeing ubuf_info_msgzc while TX skbs still hold live destructor_arg pointers.

KASAN reports use-after-free on a freed ubuf_info_msgzc:

BUG: KASAN: slab-use-after-free in skb_release_data+0x77b/0x810 Read of size 8 at addr ffff88801574d3e8 by task poc/220

Call Trace: skb_release_data+0x77b/0x810 kfree_skb_list_reason+0x13e/0x610 skb_release_data+0x4cd/0x810 sk_skb_reason_drop+0xf3/0x340 skb_queue_purge_reason+0x282/0x440 rds_tcp_inc_free+0x1e/0x30 rds_recvmsg+0x354/0x1780 __sys_recvmsg+0xdf/0x180

Allocated by task 219: msg_zerocopy_realloc+0x157/0x7b0 tcp_sendmsg_locked+0x2892/0x3ba0

Freed by task 219: ip_recv_error+0x74a/0xb10 tcp_recvmsg+0x475/0x530

The skb consuming the late access still referenced the same uarg via shinfo->destructor_arg copied by pskb_carve_inside_nonlinear() without a refcount bump. This has been verified to be reliably exploitable: a working proof-of-concept achieves full root privilege escalation from an unprivileged local user on a default kernel configuration.

The fix follows the pattern of pskb_expand_head() which has the same memcpy/cloned structure. For pskb_carve_inside_header(), net_zcopy_get() is placed after skb_orphan_frags() succeeds, so the orphan error path needs no cleanup. For pskb_carve_inside_nonlinear(), net_zcopy_get() is placed after all failure points and just before skb_release_data(), so no error path needs cleanup at all -- matching pskb_expand_head() more closely and avoiding the need for a balancing net_zcopy_put().

Severity

7.8 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2026-52943"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416",
      "CWE-911"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-24T10:17:19Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: skbuff: fix missing zerocopy reference in pskb_carve helpers\n\npskb_carve_inside_header() and pskb_carve_inside_nonlinear() both copy\nthe old skb_shared_info header into a new buffer via memcpy(), which\nincludes the destructor_arg pointer (uarg) for MSG_ZEROCOPY skbs.\nNeither function calls net_zcopy_get() for the new shinfo, creating an\nunaccounted holder: every skb_shared_info with destructor_arg set will\ncall skb_zcopy_clear() once when freed, but the corresponding\nnet_zcopy_get() was never called for the new copy. Repeated calls\ndrive uarg-\u003erefcnt to zero prematurely, freeing ubuf_info_msgzc while\nTX skbs still hold live destructor_arg pointers.\n\nKASAN reports use-after-free on a freed ubuf_info_msgzc:\n\n  BUG: KASAN: slab-use-after-free in skb_release_data+0x77b/0x810\n  Read of size 8 at addr ffff88801574d3e8 by task poc/220\n\n  Call Trace:\n   skb_release_data+0x77b/0x810\n   kfree_skb_list_reason+0x13e/0x610\n   skb_release_data+0x4cd/0x810\n   sk_skb_reason_drop+0xf3/0x340\n   skb_queue_purge_reason+0x282/0x440\n   rds_tcp_inc_free+0x1e/0x30\n   rds_recvmsg+0x354/0x1780\n   __sys_recvmsg+0xdf/0x180\n\n  Allocated by task 219:\n   msg_zerocopy_realloc+0x157/0x7b0\n   tcp_sendmsg_locked+0x2892/0x3ba0\n\n  Freed by task 219:\n   ip_recv_error+0x74a/0xb10\n   tcp_recvmsg+0x475/0x530\n\nThe skb consuming the late access still referenced the same uarg via\nshinfo-\u003edestructor_arg copied by pskb_carve_inside_nonlinear() without\na refcount bump. This has been verified to be reliably exploitable: a\nworking proof-of-concept achieves full root privilege escalation from\nan unprivileged local user on a default kernel configuration.\n\nThe fix follows the pattern of pskb_expand_head() which has the same\nmemcpy/cloned structure. For pskb_carve_inside_header(), net_zcopy_get()\nis placed after skb_orphan_frags() succeeds, so the orphan error path\nneeds no cleanup. For pskb_carve_inside_nonlinear(), net_zcopy_get() is\nplaced after all failure points and just before skb_release_data(), so\nno error path needs cleanup at all -- matching pskb_expand_head() more\nclosely and avoiding the need for a balancing net_zcopy_put().",
  "id": "GHSA-vwrr-994w-h832",
  "modified": "2026-06-30T03:37:10Z",
  "published": "2026-06-24T12:30:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-52943"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-52943"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492137"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2e0e74c59b2761a414d9f48d7bee1e45220b2427"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/474d6c771d798bca84f0a140b611e36743511e18"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8dbed691e43a50903658130bde0fcb5abc425b37"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/96a4713ae041cc85e712bac682cd2e644004d6c6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/98d0912e9f841e5529a5b89a972805f34cb1c69d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9b40bdc2a3298225dffab8158208a0d8c6300578"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ceafb893b12f23331dcc5ff9587e643c3a40ee9f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fd470f0a97b8e9a125f520265d2f3b088ffb5b8a"
    },
    {
      "type": "WEB",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-52943.json"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-VWV2-838R-2Q6P

Vulnerability from github – Published: 2025-07-25 18:30 – Updated: 2025-12-22 21:30

Details

In the Linux kernel, the following vulnerability has been resolved:

tipc: Fix use-after-free in tipc_conn_close().

syzbot reported a null-ptr-deref in tipc_conn_close() during netns dismantle. [0]

tipc_topsrv_stop() iterates tipc_net(net)->topsrv->conn_idr and calls tipc_conn_close() for each tipc_conn.

The problem is that tipc_conn_close() is called after releasing the IDR lock.

At the same time, there might be tipc_conn_recv_work() running and it could call tipc_conn_close() for the same tipc_conn and release its last ->kref.

Once we release the IDR lock in tipc_topsrv_stop(), there is no guarantee that the tipc_conn is alive.

Let's hold the ref before releasing the lock and put the ref after tipc_conn_close() in tipc_topsrv_stop().

[0]: BUG: KASAN: use-after-free in tipc_conn_close+0x122/0x140 net/tipc/topsrv.c:165 Read of size 8 at addr ffff888099305a08 by task kworker/u4:3/435

CPU: 0 PID: 435 Comm: kworker/u4:3 Not tainted 4.19.204-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256 kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354 kasan_report mm/kasan/report.c:412 [inline] __asan_report_load8_noabort+0x88/0x90 mm/kasan/report.c:433 tipc_conn_close+0x122/0x140 net/tipc/topsrv.c:165 tipc_topsrv_stop net/tipc/topsrv.c:701 [inline] tipc_topsrv_exit_net+0x27b/0x5c0 net/tipc/topsrv.c:722 ops_exit_list+0xa5/0x150 net/core/net_namespace.c:153 cleanup_net+0x3b4/0x8b0 net/core/net_namespace.c:553 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415

Allocated by task 23: kmem_cache_alloc_trace+0x12f/0x380 mm/slab.c:3625 kmalloc include/linux/slab.h:515 [inline] kzalloc include/linux/slab.h:709 [inline] tipc_conn_alloc+0x43/0x4f0 net/tipc/topsrv.c:192 tipc_topsrv_accept+0x1b5/0x280 net/tipc/topsrv.c:470 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415

Freed by task 23: __cache_free mm/slab.c:3503 [inline] kfree+0xcc/0x210 mm/slab.c:3822 tipc_conn_kref_release net/tipc/topsrv.c:150 [inline] kref_put include/linux/kref.h:70 [inline] conn_put+0x2cd/0x3a0 net/tipc/topsrv.c:155 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415

The buggy address belongs to the object at ffff888099305a00 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 8 bytes inside of 512-byte region [ffff888099305a00, ffff888099305c00) The buggy address belongs to the page: page:ffffea000264c140 count:1 mapcount:0 mapping:ffff88813bff0940 index:0x0 flags: 0xfff00000000100(slab) raw: 00fff00000000100 ffffea00028b6b88 ffffea0002cd2b08 ffff88813bff0940 raw: 0000000000000000 ffff888099305000 0000000100000006 0000000000000000 page dumped because: kasan: bad access detected

Memory state around the buggy address: ffff888099305900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888099305980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc

ffff888099305a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888099305a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888099305b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb

Severity

7.8 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Show details on source website

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{
  "affected": [],
  "aliases": [
    "CVE-2025-38464"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-07-25T16:15:32Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: Fix use-after-free in tipc_conn_close().\n\nsyzbot reported a null-ptr-deref in tipc_conn_close() during netns\ndismantle. [0]\n\ntipc_topsrv_stop() iterates tipc_net(net)-\u003etopsrv-\u003econn_idr and calls\ntipc_conn_close() for each tipc_conn.\n\nThe problem is that tipc_conn_close() is called after releasing the\nIDR lock.\n\nAt the same time, there might be tipc_conn_recv_work() running and it\ncould call tipc_conn_close() for the same tipc_conn and release its\nlast -\u003ekref.\n\nOnce we release the IDR lock in tipc_topsrv_stop(), there is no\nguarantee that the tipc_conn is alive.\n\nLet\u0027s hold the ref before releasing the lock and put the ref after\ntipc_conn_close() in tipc_topsrv_stop().\n\n[0]:\nBUG: KASAN: use-after-free in tipc_conn_close+0x122/0x140 net/tipc/topsrv.c:165\nRead of size 8 at addr ffff888099305a08 by task kworker/u4:3/435\n\nCPU: 0 PID: 435 Comm: kworker/u4:3 Not tainted 4.19.204-syzkaller #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011\nWorkqueue: netns cleanup_net\nCall Trace:\n __dump_stack lib/dump_stack.c:77 [inline]\n dump_stack+0x1fc/0x2ef lib/dump_stack.c:118\n print_address_description.cold+0x54/0x219 mm/kasan/report.c:256\n kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354\n kasan_report mm/kasan/report.c:412 [inline]\n __asan_report_load8_noabort+0x88/0x90 mm/kasan/report.c:433\n tipc_conn_close+0x122/0x140 net/tipc/topsrv.c:165\n tipc_topsrv_stop net/tipc/topsrv.c:701 [inline]\n tipc_topsrv_exit_net+0x27b/0x5c0 net/tipc/topsrv.c:722\n ops_exit_list+0xa5/0x150 net/core/net_namespace.c:153\n cleanup_net+0x3b4/0x8b0 net/core/net_namespace.c:553\n process_one_work+0x864/0x1570 kernel/workqueue.c:2153\n worker_thread+0x64c/0x1130 kernel/workqueue.c:2296\n kthread+0x33f/0x460 kernel/kthread.c:259\n ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415\n\nAllocated by task 23:\n kmem_cache_alloc_trace+0x12f/0x380 mm/slab.c:3625\n kmalloc include/linux/slab.h:515 [inline]\n kzalloc include/linux/slab.h:709 [inline]\n tipc_conn_alloc+0x43/0x4f0 net/tipc/topsrv.c:192\n tipc_topsrv_accept+0x1b5/0x280 net/tipc/topsrv.c:470\n process_one_work+0x864/0x1570 kernel/workqueue.c:2153\n worker_thread+0x64c/0x1130 kernel/workqueue.c:2296\n kthread+0x33f/0x460 kernel/kthread.c:259\n ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415\n\nFreed by task 23:\n __cache_free mm/slab.c:3503 [inline]\n kfree+0xcc/0x210 mm/slab.c:3822\n tipc_conn_kref_release net/tipc/topsrv.c:150 [inline]\n kref_put include/linux/kref.h:70 [inline]\n conn_put+0x2cd/0x3a0 net/tipc/topsrv.c:155\n process_one_work+0x864/0x1570 kernel/workqueue.c:2153\n worker_thread+0x64c/0x1130 kernel/workqueue.c:2296\n kthread+0x33f/0x460 kernel/kthread.c:259\n ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415\n\nThe buggy address belongs to the object at ffff888099305a00\n which belongs to the cache kmalloc-512 of size 512\nThe buggy address is located 8 bytes inside of\n 512-byte region [ffff888099305a00, ffff888099305c00)\nThe buggy address belongs to the page:\npage:ffffea000264c140 count:1 mapcount:0 mapping:ffff88813bff0940 index:0x0\nflags: 0xfff00000000100(slab)\nraw: 00fff00000000100 ffffea00028b6b88 ffffea0002cd2b08 ffff88813bff0940\nraw: 0000000000000000 ffff888099305000 0000000100000006 0000000000000000\npage dumped because: kasan: bad access detected\n\nMemory state around the buggy address:\n ffff888099305900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n ffff888099305980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc\n\u003effff888099305a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n                      ^\n ffff888099305a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n ffff888099305b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb",
  "id": "GHSA-vwv2-838r-2q6p",
  "modified": "2025-12-22T21:30:29Z",
  "published": "2025-07-25T18:30:40Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38464"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/03dcdd2558e1e55bf843822fe4363dcb48743f2b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/15a6f4971e2f157d57e09ea748d1fbc714277aa4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1dbf7cd2454a28b1da700085b99346b5445aeabb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3b89e17b2fd64012682bed158d9eb3d2e96dec42"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/50aa2d121bc2cfe2d825f8a331ea75dfaaab6a50"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/667eeab4999e981c96b447a4df5f20bdf5c26f13"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/be4b8392da7978294f2f368799d29dd509fb6c4d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dab8ded2e5ff41012a6ff400b44dbe76ccf3592a"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-VWV9-76QV-G45F

Vulnerability from github – Published: 2022-05-24 17:41 – Updated: 2022-05-24 17:41

Details

Use after free in Omnibox in Google Chrome on Linux prior to 88.0.4324.96 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page.

Show details on source website

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{
  "affected": [],
  "aliases": [
    "CVE-2021-21121"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2021-02-09T14:15:00Z",
    "severity": "CRITICAL"
  },
  "details": "Use after free in Omnibox in Google Chrome on Linux prior to 88.0.4324.96 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page.",
  "id": "GHSA-vwv9-76qv-g45f",
  "modified": "2022-05-24T17:41:32Z",
  "published": "2022-05-24T17:41:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-21121"
    },
    {
      "type": "WEB",
      "url": "https://chromereleases.googleblog.com/2021/01/stable-channel-update-for-desktop_19.html"
    },
    {
      "type": "WEB",
      "url": "https://crbug.com/1161143"
    },
    {
      "type": "WEB",
      "url": "https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-21121"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CWE-416

Use After Free

GHSA-VWGF-GFHW-H447

GHSA-VWJX-575R-P4W6

GHSA-VWM2-FVJJ-VCV3

GHSA-VWM4-62GF-X745

Summary

Version

Details

Reproduce

GHSA-VWMP-JPWW-475P

GHSA-VWPW-P8HM-QH66

GHSA-VWQX-W7G5-RMQM

GHSA-VWRR-994W-H832

GHSA-VWV2-838R-2Q6P

GHSA-VWV9-76QV-G45F

Mitigation

Mitigation