{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2025-39736", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T07:20:57.119Z", "datePublished": "2025-09-11T16:52:11.772Z", "dateUpdated": "2025-09-29T05:58:21.948Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-09-29T05:58:21.948Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/kmemleak: avoid deadlock by moving pr_warn() outside kmemleak_lock\n\nWhen netpoll is enabled, calling pr_warn_once() while holding\nkmemleak_lock in mem_pool_alloc() can cause a deadlock due to lock\ninversion with the netconsole subsystem. This occurs because\npr_warn_once() may trigger netpoll, which eventually leads to\n__alloc_skb() and back into kmemleak code, attempting to reacquire\nkmemleak_lock.\n\nThis is the path for the deadlock.\n\nmem_pool_alloc()\n -> raw_spin_lock_irqsave(&kmemleak_lock, flags);\n -> pr_warn_once()\n -> netconsole subsystem\n\t -> netpoll\n\t -> __alloc_skb\n\t\t -> __create_object\n\t\t -> raw_spin_lock_irqsave(&kmemleak_lock, flags);\n\nFix this by setting a flag and issuing the pr_warn_once() after\nkmemleak_lock is released."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["mm/kmemleak.c"], "versions": [{"version": "c5665868183fec689dbab9fb8505188b2c4f0757", "lessThan": "c7b6ea0ede687e7460e593c5ea478f50aa41682a", "status": "affected", "versionType": "git"}, {"version": "c5665868183fec689dbab9fb8505188b2c4f0757", "lessThan": "4b0151e1d468eb2667c37b7af99b3c075072d334", "status": "affected", "versionType": "git"}, {"version": "c5665868183fec689dbab9fb8505188b2c4f0757", "lessThan": "f249d32bb54876b4b6c3ae071af8ddca77af390b", "status": "affected", "versionType": "git"}, {"version": "c5665868183fec689dbab9fb8505188b2c4f0757", "lessThan": "62879faa8efe8d8a9c7bf7606ee9c068012d7dac", "status": "affected", "versionType": "git"}, {"version": "c5665868183fec689dbab9fb8505188b2c4f0757", "lessThan": "1da95d3d4b7b1d380ebd87b71a61e7e6aed3265d", "status": "affected", "versionType": "git"}, {"version": "c5665868183fec689dbab9fb8505188b2c4f0757", "lessThan": "a0854de00ce2ee27edf39037e7836ad580eb3350", "status": "affected", "versionType": "git"}, {"version": "c5665868183fec689dbab9fb8505188b2c4f0757", "lessThan": "08f70be5e406ce47c822f2dd11c1170ca259605b", "status": "affected", "versionType": "git"}, {"version": "c5665868183fec689dbab9fb8505188b2c4f0757", "lessThan": "a181b228b37a6a5625dad2bb4265bb7abb673e9f", "status": "affected", "versionType": "git"}, {"version": "c5665868183fec689dbab9fb8505188b2c4f0757", "lessThan": "47b0f6d8f0d2be4d311a49e13d2fd5f152f492b2", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["mm/kmemleak.c"], "versions": [{"version": "5.4", "status": "affected"}, {"version": "0", "lessThan": "5.4", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.297", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.241", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.190", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.149", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.103", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.43", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.15.11", "lessThanOrEqual": "6.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.16.2", "lessThanOrEqual": "6.16.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.17", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4", "versionEndExcluding": "5.4.297"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4", "versionEndExcluding": "5.10.241"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4", "versionEndExcluding": "5.15.190"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4", "versionEndExcluding": "6.1.149"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4", "versionEndExcluding": "6.6.103"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4", "versionEndExcluding": "6.12.43"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4", "versionEndExcluding": "6.15.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4", "versionEndExcluding": "6.16.2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4", "versionEndExcluding": "6.17"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/c7b6ea0ede687e7460e593c5ea478f50aa41682a"}, {"url": "https://git.kernel.org/stable/c/4b0151e1d468eb2667c37b7af99b3c075072d334"}, {"url": "https://git.kernel.org/stable/c/f249d32bb54876b4b6c3ae071af8ddca77af390b"}, {"url": "https://git.kernel.org/stable/c/62879faa8efe8d8a9c7bf7606ee9c068012d7dac"}, {"url": "https://git.kernel.org/stable/c/1da95d3d4b7b1d380ebd87b71a61e7e6aed3265d"}, {"url": "https://git.kernel.org/stable/c/a0854de00ce2ee27edf39037e7836ad580eb3350"}, {"url": "https://git.kernel.org/stable/c/08f70be5e406ce47c822f2dd11c1170ca259605b"}, {"url": "https://git.kernel.org/stable/c/a181b228b37a6a5625dad2bb4265bb7abb673e9f"}, {"url": "https://git.kernel.org/stable/c/47b0f6d8f0d2be4d311a49e13d2fd5f152f492b2"}], "title": "mm/kmemleak: avoid deadlock by moving pr_warn() outside kmemleak_lock", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/kmemleak: avoid deadlock by moving pr_warn() outside kmemleak_lock\n\nWhen netpoll is enabled, calling pr_warn_once() while holding\nkmemleak_lock in mem_pool_alloc() can cause a deadlock due to lock\ninversion with the netconsole subsystem. This occurs because\npr_warn_once() may trigger netpoll, which eventually leads to\n__alloc_skb() and back into kmemleak code, attempting to reacquire\nkmemleak_lock.\n\nThis is the path for the deadlock.\n\nmem_pool_alloc()\n -> raw_spin_lock_irqsave(&kmemleak_lock, flags);\n -> pr_warn_once()\n -> netconsole subsystem\n\t -> netpoll\n\t -> __alloc_skb\n\t\t -> __create_object\n\t\t -> raw_spin_lock_irqsave(&kmemleak_lock, flags);\n\nFix this by setting a flag and issuing the pr_warn_once() after\nkmemleak_lock is released."}], "id": "CVE-2025-39736", "lastModified": "2025-09-15T15:22:38.297", "metrics": {}, "published": "2025-09-11T17:15:34.840", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/08f70be5e406ce47c822f2dd11c1170ca259605b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1da95d3d4b7b1d380ebd87b71a61e7e6aed3265d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/47b0f6d8f0d2be4d311a49e13d2fd5f152f492b2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4b0151e1d468eb2667c37b7af99b3c075072d334"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/62879faa8efe8d8a9c7bf7606ee9c068012d7dac"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a0854de00ce2ee27edf39037e7836ad580eb3350"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a181b228b37a6a5625dad2bb4265bb7abb673e9f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c7b6ea0ede687e7460e593c5ea478f50aa41682a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f249d32bb54876b4b6c3ae071af8ddca77af390b"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: mm/kmemleak: avoid deadlock by moving pr_warn() outside kmemleak_lock", "id": "2394644", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2394644"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["No description is available for this CVE."], "name": "CVE-2025-39736", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-09-11T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-39736\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-39736\nhttps://lore.kernel.org/linux-cve-announce/2025091136-CVE-2025-39736-8dfc@gregkh/T"], "threat_severity": "Low"}

{"created": "2025-09-12T08:02:37.962079+00:00", "updated": "2025-09-12T08:02:37.962133+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}