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CVE-2023-53441 (GCVE-0-2023-53441)

Vulnerability from cvelistv5 – Published: 2025-09-18 16:04 – Updated: 2026-05-11 19:45
VLAI
Title
bpf: cpumap: Fix memory leak in cpu_map_update_elem
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf: cpumap: Fix memory leak in cpu_map_update_elem Syzkaller reported a memory leak as follows: BUG: memory leak unreferenced object 0xff110001198ef748 (size 192): comm "syz-executor.3", pid 17672, jiffies 4298118891 (age 9.906s) hex dump (first 32 bytes): 00 00 00 00 4a 19 00 00 80 ad e3 e4 fe ff c0 00 ....J........... 00 b2 d3 0c 01 00 11 ff 28 f5 8e 19 01 00 11 ff ........(....... backtrace: [<ffffffffadd28087>] __cpu_map_entry_alloc+0xf7/0xb00 [<ffffffffadd28d8e>] cpu_map_update_elem+0x2fe/0x3d0 [<ffffffffadc6d0fd>] bpf_map_update_value.isra.0+0x2bd/0x520 [<ffffffffadc7349b>] map_update_elem+0x4cb/0x720 [<ffffffffadc7d983>] __se_sys_bpf+0x8c3/0xb90 [<ffffffffb029cc80>] do_syscall_64+0x30/0x40 [<ffffffffb0400099>] entry_SYSCALL_64_after_hwframe+0x61/0xc6 BUG: memory leak unreferenced object 0xff110001198ef528 (size 192): comm "syz-executor.3", pid 17672, jiffies 4298118891 (age 9.906s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffffadd281f0>] __cpu_map_entry_alloc+0x260/0xb00 [<ffffffffadd28d8e>] cpu_map_update_elem+0x2fe/0x3d0 [<ffffffffadc6d0fd>] bpf_map_update_value.isra.0+0x2bd/0x520 [<ffffffffadc7349b>] map_update_elem+0x4cb/0x720 [<ffffffffadc7d983>] __se_sys_bpf+0x8c3/0xb90 [<ffffffffb029cc80>] do_syscall_64+0x30/0x40 [<ffffffffb0400099>] entry_SYSCALL_64_after_hwframe+0x61/0xc6 BUG: memory leak unreferenced object 0xff1100010fd93d68 (size 8): comm "syz-executor.3", pid 17672, jiffies 4298118891 (age 9.906s) hex dump (first 8 bytes): 00 00 00 00 00 00 00 00 ........ backtrace: [<ffffffffade5db3e>] kvmalloc_node+0x11e/0x170 [<ffffffffadd28280>] __cpu_map_entry_alloc+0x2f0/0xb00 [<ffffffffadd28d8e>] cpu_map_update_elem+0x2fe/0x3d0 [<ffffffffadc6d0fd>] bpf_map_update_value.isra.0+0x2bd/0x520 [<ffffffffadc7349b>] map_update_elem+0x4cb/0x720 [<ffffffffadc7d983>] __se_sys_bpf+0x8c3/0xb90 [<ffffffffb029cc80>] do_syscall_64+0x30/0x40 [<ffffffffb0400099>] entry_SYSCALL_64_after_hwframe+0x61/0xc6 In the cpu_map_update_elem flow, when kthread_stop is called before calling the threadfn of rcpu->kthread, since the KTHREAD_SHOULD_STOP bit of kthread has been set by kthread_stop, the threadfn of rcpu->kthread will never be executed, and rcpu->refcnt will never be 0, which will lead to the allocated rcpu, rcpu->queue and rcpu->queue->queue cannot be released. Calling kthread_stop before executing kthread's threadfn will return -EINTR. We can complete the release of memory resources in this state.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-14 19:18 UTC
CWE
  • CWE-401 - Missing Release of Memory after Effective Lifetime
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 6710e1126934d8b4372b4d2f9ae1646cd3f151bf , < d26299f50f5ea8f0aeb5d49e659c31f64233c816 (git)
Affected: 6710e1126934d8b4372b4d2f9ae1646cd3f151bf , < b11a9b4f28cb6ff69ef7e69809e5f7fffeac9030 (git)
Affected: 6710e1126934d8b4372b4d2f9ae1646cd3f151bf , < a957ac8e0b5ffb5797382a6adbafd005a5f72851 (git)
Affected: 6710e1126934d8b4372b4d2f9ae1646cd3f151bf , < 4369016497319a9635702da010d02af1ebb1849d (git)
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Linux Linux Affected: 4.15
Unaffected: 0 , < 4.15 (semver)
Unaffected: 5.15.121 , ≤ 5.15.* (semver)
Unaffected: 6.1.40 , ≤ 6.1.* (semver)
Unaffected: 6.4.5 , ≤ 6.4.* (semver)
Unaffected: 6.5 , ≤ * (original_commit_for_fix)
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              "userInteraction": "NONE",
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: cpumap: Fix memory leak in cpu_map_update_elem\n\nSyzkaller reported a memory leak as follows:\n\nBUG: memory leak\nunreferenced object 0xff110001198ef748 (size 192):\n  comm \"syz-executor.3\", pid 17672, jiffies 4298118891 (age 9.906s)\n  hex dump (first 32 bytes):\n    00 00 00 00 4a 19 00 00 80 ad e3 e4 fe ff c0 00  ....J...........\n    00 b2 d3 0c 01 00 11 ff 28 f5 8e 19 01 00 11 ff  ........(.......\n  backtrace:\n    [\u003cffffffffadd28087\u003e] __cpu_map_entry_alloc+0xf7/0xb00\n    [\u003cffffffffadd28d8e\u003e] cpu_map_update_elem+0x2fe/0x3d0\n    [\u003cffffffffadc6d0fd\u003e] bpf_map_update_value.isra.0+0x2bd/0x520\n    [\u003cffffffffadc7349b\u003e] map_update_elem+0x4cb/0x720\n    [\u003cffffffffadc7d983\u003e] __se_sys_bpf+0x8c3/0xb90\n    [\u003cffffffffb029cc80\u003e] do_syscall_64+0x30/0x40\n    [\u003cffffffffb0400099\u003e] entry_SYSCALL_64_after_hwframe+0x61/0xc6\n\nBUG: memory leak\nunreferenced object 0xff110001198ef528 (size 192):\n  comm \"syz-executor.3\", pid 17672, jiffies 4298118891 (age 9.906s)\n  hex dump (first 32 bytes):\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n  backtrace:\n    [\u003cffffffffadd281f0\u003e] __cpu_map_entry_alloc+0x260/0xb00\n    [\u003cffffffffadd28d8e\u003e] cpu_map_update_elem+0x2fe/0x3d0\n    [\u003cffffffffadc6d0fd\u003e] bpf_map_update_value.isra.0+0x2bd/0x520\n    [\u003cffffffffadc7349b\u003e] map_update_elem+0x4cb/0x720\n    [\u003cffffffffadc7d983\u003e] __se_sys_bpf+0x8c3/0xb90\n    [\u003cffffffffb029cc80\u003e] do_syscall_64+0x30/0x40\n    [\u003cffffffffb0400099\u003e] entry_SYSCALL_64_after_hwframe+0x61/0xc6\n\nBUG: memory leak\nunreferenced object 0xff1100010fd93d68 (size 8):\n  comm \"syz-executor.3\", pid 17672, jiffies 4298118891 (age 9.906s)\n  hex dump (first 8 bytes):\n    00 00 00 00 00 00 00 00                          ........\n  backtrace:\n    [\u003cffffffffade5db3e\u003e] kvmalloc_node+0x11e/0x170\n    [\u003cffffffffadd28280\u003e] __cpu_map_entry_alloc+0x2f0/0xb00\n    [\u003cffffffffadd28d8e\u003e] cpu_map_update_elem+0x2fe/0x3d0\n    [\u003cffffffffadc6d0fd\u003e] bpf_map_update_value.isra.0+0x2bd/0x520\n    [\u003cffffffffadc7349b\u003e] map_update_elem+0x4cb/0x720\n    [\u003cffffffffadc7d983\u003e] __se_sys_bpf+0x8c3/0xb90\n    [\u003cffffffffb029cc80\u003e] do_syscall_64+0x30/0x40\n    [\u003cffffffffb0400099\u003e] entry_SYSCALL_64_after_hwframe+0x61/0xc6\n\nIn the cpu_map_update_elem flow, when kthread_stop is called before\ncalling the threadfn of rcpu-\u003ekthread, since the KTHREAD_SHOULD_STOP bit\nof kthread has been set by kthread_stop, the threadfn of rcpu-\u003ekthread\nwill never be executed, and rcpu-\u003erefcnt will never be 0, which will\nlead to the allocated rcpu, rcpu-\u003equeue and rcpu-\u003equeue-\u003equeue cannot be\nreleased.\n\nCalling kthread_stop before executing kthread\u0027s threadfn will return\n-EINTR. We can complete the release of memory resources in this state."
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        "dateUpdated": "2026-05-11T19:45:03.854Z",
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        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/d26299f50f5ea8f0aeb5d49e659c31f64233c816"
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    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53441",
    "datePublished": "2025-09-18T16:04:18.519Z",
    "dateReserved": "2025-09-17T14:54:09.752Z",
    "dateUpdated": "2026-05-11T19:45:03.854Z",
    "state": "PUBLISHED"
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    "epss": {
      "cve": "CVE-2023-53441",
      "date": "2026-09-16",
      "epss": "0.00145",
      "percentile": "0.04129"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-53441\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-09-18T16:15:48.353\",\"lastModified\":\"2026-06-17T06:45:20.777\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nbpf: cpumap: Fix memory leak in cpu_map_update_elem\\n\\nSyzkaller reported a memory leak as follows:\\n\\nBUG: memory leak\\nunreferenced object 0xff110001198ef748 (size 192):\\n  comm \\\"syz-executor.3\\\", pid 17672, jiffies 4298118891 (age 9.906s)\\n  hex dump (first 32 bytes):\\n    00 00 00 00 4a 19 00 00 80 ad e3 e4 fe ff c0 00  ....J...........\\n    00 b2 d3 0c 01 00 11 ff 28 f5 8e 19 01 00 11 ff  ........(.......\\n  backtrace:\\n    [\u003cffffffffadd28087\u003e] __cpu_map_entry_alloc+0xf7/0xb00\\n    [\u003cffffffffadd28d8e\u003e] cpu_map_update_elem+0x2fe/0x3d0\\n    [\u003cffffffffadc6d0fd\u003e] bpf_map_update_value.isra.0+0x2bd/0x520\\n    [\u003cffffffffadc7349b\u003e] map_update_elem+0x4cb/0x720\\n    [\u003cffffffffadc7d983\u003e] __se_sys_bpf+0x8c3/0xb90\\n    [\u003cffffffffb029cc80\u003e] do_syscall_64+0x30/0x40\\n    [\u003cffffffffb0400099\u003e] entry_SYSCALL_64_after_hwframe+0x61/0xc6\\n\\nBUG: memory leak\\nunreferenced object 0xff110001198ef528 (size 192):\\n  comm \\\"syz-executor.3\\\", pid 17672, jiffies 4298118891 (age 9.906s)\\n  hex dump (first 32 bytes):\\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\\n  backtrace:\\n    [\u003cffffffffadd281f0\u003e] __cpu_map_entry_alloc+0x260/0xb00\\n    [\u003cffffffffadd28d8e\u003e] cpu_map_update_elem+0x2fe/0x3d0\\n    [\u003cffffffffadc6d0fd\u003e] bpf_map_update_value.isra.0+0x2bd/0x520\\n    [\u003cffffffffadc7349b\u003e] map_update_elem+0x4cb/0x720\\n    [\u003cffffffffadc7d983\u003e] __se_sys_bpf+0x8c3/0xb90\\n    [\u003cffffffffb029cc80\u003e] do_syscall_64+0x30/0x40\\n    [\u003cffffffffb0400099\u003e] entry_SYSCALL_64_after_hwframe+0x61/0xc6\\n\\nBUG: memory leak\\nunreferenced object 0xff1100010fd93d68 (size 8):\\n  comm \\\"syz-executor.3\\\", pid 17672, jiffies 4298118891 (age 9.906s)\\n  hex dump (first 8 bytes):\\n    00 00 00 00 00 00 00 00                          ........\\n  backtrace:\\n    [\u003cffffffffade5db3e\u003e] kvmalloc_node+0x11e/0x170\\n    [\u003cffffffffadd28280\u003e] __cpu_map_entry_alloc+0x2f0/0xb00\\n    [\u003cffffffffadd28d8e\u003e] cpu_map_update_elem+0x2fe/0x3d0\\n    [\u003cffffffffadc6d0fd\u003e] bpf_map_update_value.isra.0+0x2bd/0x520\\n    [\u003cffffffffadc7349b\u003e] map_update_elem+0x4cb/0x720\\n    [\u003cffffffffadc7d983\u003e] __se_sys_bpf+0x8c3/0xb90\\n    [\u003cffffffffb029cc80\u003e] do_syscall_64+0x30/0x40\\n    [\u003cffffffffb0400099\u003e] entry_SYSCALL_64_after_hwframe+0x61/0xc6\\n\\nIn the cpu_map_update_elem flow, when kthread_stop is called before\\ncalling the threadfn of rcpu-\u003ekthread, since the KTHREAD_SHOULD_STOP bit\\nof kthread has been set by kthread_stop, the threadfn of rcpu-\u003ekthread\\nwill never be executed, and rcpu-\u003erefcnt will never be 0, which will\\nlead to the allocated rcpu, rcpu-\u003equeue and rcpu-\u003equeue-\u003equeue cannot be\\nreleased.\\n\\nCalling kthread_stop before executing kthread\u0027s threadfn will return\\n-EINTR. We can complete the release of memory resources in this state.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"kernel/bpf/cpumap.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6710e1126934d8b4372b4d2f9ae1646cd3f151bf\",\"lessThan\":\"d26299f50f5ea8f0aeb5d49e659c31f64233c816\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6710e1126934d8b4372b4d2f9ae1646cd3f151bf\",\"lessThan\":\"b11a9b4f28cb6ff69ef7e69809e5f7fffeac9030\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6710e1126934d8b4372b4d2f9ae1646cd3f151bf\",\"lessThan\":\"a957ac8e0b5ffb5797382a6adbafd005a5f72851\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6710e1126934d8b4372b4d2f9ae1646cd3f151bf\",\"lessThan\":\"4369016497319a9635702da010d02af1ebb1849d\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"kernel/bpf/cpumap.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4.15\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"4.15\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.121\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.40\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.4.5\",\"lessThanOrEqual\":\"6.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.5\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-01-14T19:18:06.942324Z\",\"id\":\"CVE-2023-53441\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-401\"}]},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-401\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.15\",\"versionEndExcluding\":\"5.15.121\",\"matchCriteriaId\":\"854671FA-2529-4D29-8AF5-DD1DA204EA4A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.40\",\"matchCriteriaId\":\"69315BCC-36D2-45CD-84F8-381EDF8E38F3\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.4.5\",\"matchCriteriaId\":\"923F6AEA-C2EF-4B08-B038-69A18F3D41F8\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.5:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"0B3E6E4D-E24E-4630-B00C-8C9901C597B0\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/4369016497319a9635702da010d02af1ebb1849d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/a957ac8e0b5ffb5797382a6adbafd005a5f72851\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/b11a9b4f28cb6ff69ef7e69809e5f7fffeac9030\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d26299f50f5ea8f0aeb5d49e659c31f64233c816\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-06-30T10:25:44+00:00",
      "cve": "CVE-2023-53441",
      "id": "CVE-2023-53441",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:fixed": "399",
      "product_status:known_affected": "38",
      "product_status:known_not_affected": "118",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: bpf: cpumap: Fix memory leak in cpu_map_update_elem",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-53441.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-02T01:44:09Z",
      "cve": "CVE-2023-53441",
      "id": "CVE-2023-53441",
      "initial_release_date": "2025-09-19T23:33:15Z",
      "product_status:known_affected": "557",
      "product_status:known_not_affected": "172",
      "product_status:recommended": "382",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2023-53441",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-53441.json",
      "version": "50"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 5.5, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"NONE\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2023-53441\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-01-14T19:18:06.942324Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-401\", \"description\": \"CWE-401 Missing Release of Memory after Effective Lifetime\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-01-14T19:18:00.683Z\"}}], \"cna\": {\"title\": \"bpf: cpumap: Fix memory leak in cpu_map_update_elem\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"6710e1126934d8b4372b4d2f9ae1646cd3f151bf\", \"lessThan\": \"d26299f50f5ea8f0aeb5d49e659c31f64233c816\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"6710e1126934d8b4372b4d2f9ae1646cd3f151bf\", \"lessThan\": \"b11a9b4f28cb6ff69ef7e69809e5f7fffeac9030\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"6710e1126934d8b4372b4d2f9ae1646cd3f151bf\", \"lessThan\": \"a957ac8e0b5ffb5797382a6adbafd005a5f72851\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"6710e1126934d8b4372b4d2f9ae1646cd3f151bf\", \"lessThan\": \"4369016497319a9635702da010d02af1ebb1849d\", \"versionType\": \"git\"}], \"programFiles\": [\"kernel/bpf/cpumap.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.15\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"4.15\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.15.121\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.40\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.4.5\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.4.*\"}, {\"status\": \"unaffected\", \"version\": \"6.5\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"kernel/bpf/cpumap.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/d26299f50f5ea8f0aeb5d49e659c31f64233c816\"}, {\"url\": \"https://git.kernel.org/stable/c/b11a9b4f28cb6ff69ef7e69809e5f7fffeac9030\"}, {\"url\": \"https://git.kernel.org/stable/c/a957ac8e0b5ffb5797382a6adbafd005a5f72851\"}, {\"url\": \"https://git.kernel.org/stable/c/4369016497319a9635702da010d02af1ebb1849d\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nbpf: cpumap: Fix memory leak in cpu_map_update_elem\\n\\nSyzkaller reported a memory leak as follows:\\n\\nBUG: memory leak\\nunreferenced object 0xff110001198ef748 (size 192):\\n  comm \\\"syz-executor.3\\\", pid 17672, jiffies 4298118891 (age 9.906s)\\n  hex dump (first 32 bytes):\\n    00 00 00 00 4a 19 00 00 80 ad e3 e4 fe ff c0 00  ....J...........\\n    00 b2 d3 0c 01 00 11 ff 28 f5 8e 19 01 00 11 ff  ........(.......\\n  backtrace:\\n    [\u003cffffffffadd28087\u003e] __cpu_map_entry_alloc+0xf7/0xb00\\n    [\u003cffffffffadd28d8e\u003e] cpu_map_update_elem+0x2fe/0x3d0\\n    [\u003cffffffffadc6d0fd\u003e] bpf_map_update_value.isra.0+0x2bd/0x520\\n    [\u003cffffffffadc7349b\u003e] map_update_elem+0x4cb/0x720\\n    [\u003cffffffffadc7d983\u003e] __se_sys_bpf+0x8c3/0xb90\\n    [\u003cffffffffb029cc80\u003e] do_syscall_64+0x30/0x40\\n    [\u003cffffffffb0400099\u003e] entry_SYSCALL_64_after_hwframe+0x61/0xc6\\n\\nBUG: memory leak\\nunreferenced object 0xff110001198ef528 (size 192):\\n  comm \\\"syz-executor.3\\\", pid 17672, jiffies 4298118891 (age 9.906s)\\n  hex dump (first 32 bytes):\\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\\n  backtrace:\\n    [\u003cffffffffadd281f0\u003e] __cpu_map_entry_alloc+0x260/0xb00\\n    [\u003cffffffffadd28d8e\u003e] cpu_map_update_elem+0x2fe/0x3d0\\n    [\u003cffffffffadc6d0fd\u003e] bpf_map_update_value.isra.0+0x2bd/0x520\\n    [\u003cffffffffadc7349b\u003e] map_update_elem+0x4cb/0x720\\n    [\u003cffffffffadc7d983\u003e] __se_sys_bpf+0x8c3/0xb90\\n    [\u003cffffffffb029cc80\u003e] do_syscall_64+0x30/0x40\\n    [\u003cffffffffb0400099\u003e] entry_SYSCALL_64_after_hwframe+0x61/0xc6\\n\\nBUG: memory leak\\nunreferenced object 0xff1100010fd93d68 (size 8):\\n  comm \\\"syz-executor.3\\\", pid 17672, jiffies 4298118891 (age 9.906s)\\n  hex dump (first 8 bytes):\\n    00 00 00 00 00 00 00 00                          ........\\n  backtrace:\\n    [\u003cffffffffade5db3e\u003e] kvmalloc_node+0x11e/0x170\\n    [\u003cffffffffadd28280\u003e] __cpu_map_entry_alloc+0x2f0/0xb00\\n    [\u003cffffffffadd28d8e\u003e] cpu_map_update_elem+0x2fe/0x3d0\\n    [\u003cffffffffadc6d0fd\u003e] bpf_map_update_value.isra.0+0x2bd/0x520\\n    [\u003cffffffffadc7349b\u003e] map_update_elem+0x4cb/0x720\\n    [\u003cffffffffadc7d983\u003e] __se_sys_bpf+0x8c3/0xb90\\n    [\u003cffffffffb029cc80\u003e] do_syscall_64+0x30/0x40\\n    [\u003cffffffffb0400099\u003e] entry_SYSCALL_64_after_hwframe+0x61/0xc6\\n\\nIn the cpu_map_update_elem flow, when kthread_stop is called before\\ncalling the threadfn of rcpu-\u003ekthread, since the KTHREAD_SHOULD_STOP bit\\nof kthread has been set by kthread_stop, the threadfn of rcpu-\u003ekthread\\nwill never be executed, and rcpu-\u003erefcnt will never be 0, which will\\nlead to the allocated rcpu, rcpu-\u003equeue and rcpu-\u003equeue-\u003equeue cannot be\\nreleased.\\n\\nCalling kthread_stop before executing kthread\u0027s threadfn will return\\n-EINTR. We can complete the release of memory resources in this state.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.121\", \"versionStartIncluding\": \"4.15\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.40\", \"versionStartIncluding\": \"4.15\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.4.5\", \"versionStartIncluding\": \"4.15\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.5\", \"versionStartIncluding\": \"4.15\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T19:45:03.854Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-53441\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-11T19:45:03.854Z\", \"dateReserved\": \"2025-09-17T14:54:09.752Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-09-18T16:04:18.519Z\", \"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

Author Source Type Date Other

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.


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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.