CVE-2026-72436

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/netfilter/ipset/ip_set_hash_gen.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "c107233d2ff4fd7cef5d02f9124b99194957a710", "status": "affected", "version": "18f84d41d34fa35d0d64bbaea01fe664553ecc06", "versionType": "git"}, {"lessThan": "6329d3a9afe715fddda0460cfa46b496d61c2fe0", "status": "affected", "version": "18f84d41d34fa35d0d64bbaea01fe664553ecc06", "versionType": "git"}, {"lessThan": "7445fe965b7d8756070a40e80f8b73348ccda1d7", "status": "affected", "version": "18f84d41d34fa35d0d64bbaea01fe664553ecc06", "versionType": "git"}, {"lessThan": "c4d257734e91bfcdc71d41843392dd6400b5bb1b", "status": "affected", "version": "18f84d41d34fa35d0d64bbaea01fe664553ecc06", "versionType": "git"}, {"lessThan": "3219d74e4536658c937fd878a327257b86ce80dd", "status": "affected", "version": "18f84d41d34fa35d0d64bbaea01fe664553ecc06", "versionType": "git"}, {"lessThan": "e4b4984e28c16406ecb318444dea4a8bf47def3e", "status": "affected", "version": "18f84d41d34fa35d0d64bbaea01fe664553ecc06", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/netfilter/ipset/ip_set_hash_gen.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.2"}, {"lessThan": "4.2", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.178", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.145", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.97", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.40", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: ipset: Don't use test_bit() in lockless RCU readers in hash types\n\nSashiko pointed out that there are a few lockless RCU readers\nusing test_bit() which is a relaxed atomic operation and\nprovides no memory barrier guarantees. Use test_bit_acquire()\ninstead where the operation may run parallel with add/del/gc,\ni.e. is not one from the next cases\n\n- protected by region lock\n- in a set destroy phase\n- in a new/temporary set creation phase"}], "id": "CVE-2026-72436", "lastModified": "2026-10-16T19:17:30.500", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-72436", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T18:49:57.755944Z", "version": "2.0.3"}}]}, "published": "2026-08-15T06:22:17.453", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3219d74e4536658c937fd878a327257b86ce80dd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6329d3a9afe715fddda0460cfa46b496d61c2fe0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7445fe965b7d8756070a40e80f8b73348ccda1d7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c107233d2ff4fd7cef5d02f9124b99194957a710"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c4d257734e91bfcdc71d41843392dd6400b5bb1b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e4b4984e28c16406ecb318444dea4a8bf47def3e"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: netfilter: ipset: Don't use test_bit() in lockless RCU readers in hash types", "id": "2516356", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516356"}, "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-821", "details": ["A flaw was found in the `netfilter: ipset` component of the Linux kernel. This vulnerability occurs because a specific operation, `test_bit()`, is used in a way that lacks proper safeguards when multiple processes access shared data simultaneously. This can lead to situations where the system processes data incorrectly or behaves unexpectedly. Such issues could potentially result in data corruption or make the system unavailable (Denial of Service)."], "name": "CVE-2026-72436", "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "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": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-72436\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-72436\nhttps://lore.kernel.org/linux-cve-announce/2026081528-CVE-2026-72436-eb00@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[18f84d41d34fa35d0d64bbaea01fe664553ecc06,c107233d2ff4fd7cef5d02f9124b99194957a710)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[18f84d41d34fa35d0d64bbaea01fe664553ecc06,6329d3a9afe715fddda0460cfa46b496d61c2fe0)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[18f84d41d34fa35d0d64bbaea01fe664553ecc06,7445fe965b7d8756070a40e80f8b73348ccda1d7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[18f84d41d34fa35d0d64bbaea01fe664553ecc06,c4d257734e91bfcdc71d41843392dd6400b5bb1b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[18f84d41d34fa35d0d64bbaea01fe664553ecc06,3219d74e4536658c937fd878a327257b86ce80dd)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[18f84d41d34fa35d0d64bbaea01fe664553ecc06,e4b4984e28c16406ecb318444dea4a8bf47def3e)"}}], "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": "generic", "value": "4.2"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,4.2)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.178,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.145,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.97,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.40,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc1,*]"}}], "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": "2026-08-15T18:00:11.226080+00:00", "updated": "2026-08-22T03:30:16.802377+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}