{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-53239", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.393Z", "datePublished": "2026-06-25T08:39:35.149Z", "dateUpdated": "2026-06-28T06:40:46.548Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-06-28T06:40:46.548Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: policy: fix use-after-free on inexact bin in xfrm_policy_bysel_ctx()\n\nFix the race by pruning the bin while still holding xfrm_policy_lock,\nbefore dropping it. Use __xfrm_policy_inexact_prune_bin() directly since\nthe lock is already held. The wrapper xfrm_policy_inexact_prune_bin()\nbecomes unused and is removed.\n\nRace:\n\n CPU0 (XFRM_MSG_DELPOLICY) CPU1 (XFRM_MSG_NEWSPDINFO)\n ========================== ==========================\n xfrm_policy_bysel_ctx():\n spin_lock_bh(xfrm_policy_lock)\n bin = xfrm_policy_inexact_lookup()\n __xfrm_policy_unlink(pol)\n spin_unlock_bh(xfrm_policy_lock)\n xfrm_policy_kill(ret)\n // wide window, lock not held\n xfrm_hash_rebuild():\n spin_lock_bh(xfrm_policy_lock)\n __xfrm_policy_inexact_flush():\n kfree_rcu(bin) // bin freed\n spin_unlock_bh(xfrm_policy_lock)\n xfrm_policy_inexact_prune_bin(bin)\n // UAF: bin is freed"}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/xfrm/xfrm_policy.c"], "versions": [{"version": "6be3b0db6db82cf056a72cc18042048edd27f8ee", "lessThan": "8fc536e9f6856230f19c7d13e71af064b6a77b22", "status": "affected", "versionType": "git"}, {"version": "6be3b0db6db82cf056a72cc18042048edd27f8ee", "lessThan": "c4c1ea36d83bf3c4569468ca5b8b614fda1bf821", "status": "affected", "versionType": "git"}, {"version": "6be3b0db6db82cf056a72cc18042048edd27f8ee", "lessThan": "25c8c7fb3b0b9668c7d05e209f58c158d2b020c7", "status": "affected", "versionType": "git"}, {"version": "6be3b0db6db82cf056a72cc18042048edd27f8ee", "lessThan": "42827d03f8009a6a218bacab153e21f39d6a121c", "status": "affected", "versionType": "git"}, {"version": "6be3b0db6db82cf056a72cc18042048edd27f8ee", "lessThan": "88697cf980222d5906a37bf47662dac0732e2a0f", "status": "affected", "versionType": "git"}, {"version": "6be3b0db6db82cf056a72cc18042048edd27f8ee", "lessThan": "b5316e2b8614a87d8736941972441cb47bfd4491", "status": "affected", "versionType": "git"}, {"version": "6be3b0db6db82cf056a72cc18042048edd27f8ee", "lessThan": "ec82ea4eb220164d854f8734ca5a35e23e577b94", "status": "affected", "versionType": "git"}, {"version": "6be3b0db6db82cf056a72cc18042048edd27f8ee", "lessThan": "7f2d76c9c03257c0782afef9d95321fa04096f60", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/xfrm/xfrm_policy.c"], "versions": [{"version": "5.0", "status": "affected"}, {"version": "0", "lessThan": "5.0", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.259", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.210", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.176", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.143", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.94", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.36", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.13", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "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": "5.0", "versionEndExcluding": "5.10.259"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "5.15.210"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "6.1.176"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "6.6.143"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "6.12.94"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "6.18.36"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "7.0.13"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/8fc536e9f6856230f19c7d13e71af064b6a77b22"}, {"url": "https://git.kernel.org/stable/c/c4c1ea36d83bf3c4569468ca5b8b614fda1bf821"}, {"url": "https://git.kernel.org/stable/c/25c8c7fb3b0b9668c7d05e209f58c158d2b020c7"}, {"url": "https://git.kernel.org/stable/c/42827d03f8009a6a218bacab153e21f39d6a121c"}, {"url": "https://git.kernel.org/stable/c/88697cf980222d5906a37bf47662dac0732e2a0f"}, {"url": "https://git.kernel.org/stable/c/b5316e2b8614a87d8736941972441cb47bfd4491"}, {"url": "https://git.kernel.org/stable/c/ec82ea4eb220164d854f8734ca5a35e23e577b94"}, {"url": "https://git.kernel.org/stable/c/7f2d76c9c03257c0782afef9d95321fa04096f60"}], "title": "xfrm: policy: fix use-after-free on inexact bin in xfrm_policy_bysel_ctx()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{}

{"bugzilla": {"description": "kernel: xfrm: policy: fix use-after-free on inexact bin in xfrm_policy_bysel_ctx()", "id": "2492779", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492779"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-364", "details": ["A flaw was found in the Linux kernel. A race condition exists in the `xfrm` policy handling, specifically within the `xfrm_policy_bysel_ctx()` function. This flaw allows for a use-after-free vulnerability, where memory is accessed after it has been released. This can lead to system instability or a denial of service (DoS), making the system unresponsive or causing it to crash."], "name": "CVE-2026-53239", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-06-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-53239\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-53239\nhttps://lore.kernel.org/linux-cve-announce/2026062510-CVE-2026-53239-8ebc@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6be3b0db6db82cf056a72cc18042048edd27f8ee,8fc536e9f6856230f19c7d13e71af064b6a77b22)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6be3b0db6db82cf056a72cc18042048edd27f8ee,c4c1ea36d83bf3c4569468ca5b8b614fda1bf821)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6be3b0db6db82cf056a72cc18042048edd27f8ee,25c8c7fb3b0b9668c7d05e209f58c158d2b020c7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6be3b0db6db82cf056a72cc18042048edd27f8ee,42827d03f8009a6a218bacab153e21f39d6a121c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6be3b0db6db82cf056a72cc18042048edd27f8ee,88697cf980222d5906a37bf47662dac0732e2a0f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6be3b0db6db82cf056a72cc18042048edd27f8ee,b5316e2b8614a87d8736941972441cb47bfd4491)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6be3b0db6db82cf056a72cc18042048edd27f8ee,ec82ea4eb220164d854f8734ca5a35e23e577b94)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6be3b0db6db82cf056a72cc18042048edd27f8ee,7f2d76c9c03257c0782afef9d95321fa04096f60)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "5.0"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,5.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.259,5.11.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.210,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.176,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.143,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.94,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.36,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.13,7.1.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-06-25T11:15:10.153854+00:00", "updated": "2026-06-28T14:15:08.504621+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}