CVE-2026-98289

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98289", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.336Z", "datePublished": "2026-10-06T08:45:49.641Z", "dateUpdated": "2026-10-19T09:17:00.475Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:17:00.475Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\naf_unix: Unify scc_index when finalising SCC in __unix_walk_scc().\n\nCommit bfdb01283ee8 (\"af_unix: Assign a unique index to SCC.\")\nchanged Tarjan's algorithm to update lowlink with lowlink,\nwhich is called lowpoint (unix_vertex.scc_index).\n\nunix_vertex_dead() assumes all vertices in an SCC share the same\nlowpoint, but this is not always true if an SCC has two or more\nback edges, depending on the order of DFS.\n\nFor example, the graph below has two back edges from B to A\nand from C to B.\n\n A --> B --> C\n ^ | ^ |\n `----' `----'\n\nIf DFS walks through A -> B -> C -> B (-> C -> B) -> A (-> B -> A),\neach index and scc_index will be updated as follows.\n\n A --> B --> C C = (3, 3) (index, scc_index)\n B = (2, 2)\n A = (1, 1)\n\n A ... B ... C C = (3, 2)<-.\n ^ | B = (2, 2) -'\n `----' A = (1, 1)\n\n A ... B ... C C = (3, 2)\n ^ | . . B = (2, 1)<-.\n `----' .... A = (1, 1) -'\n\nThen, unix_vertex_dead() thinks that B is passed to another\nSCC with scc_index 2, and the SCC is not garbage-collected.\n\nThis does not happen if DFS walks in a different order below\nor starts from B.\n\n 1 3\n A --> B --> C\n ^ | ^ |\n `----' `----'\n 2 4\n\nLet's unify scc_index across the SCC when finalising it.\n\nNote that updating v->index was previously done in unix_scc_dead(),\nwhen called from __unix_walk_scc(), just to save one loop. Since\n__unix_walk_scc() now iterates over the SCC anyway, the update is\nmoved back to __unix_walk_scc() and 'fast' argument is dropped."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/unix/garbage.c"], "versions": [{"version": "4090fa373f0e763c43610853d2774b5979915959", "lessThan": "b8f71d69380a5fbc734c868acbeb560f1de1766f", "status": "affected", "versionType": "git"}, {"version": "4090fa373f0e763c43610853d2774b5979915959", "lessThan": "be550ee108ad80828aa61280400bedfc7e7c39d3", "status": "affected", "versionType": "git"}, {"version": "4090fa373f0e763c43610853d2774b5979915959", "lessThan": "4a4263dfeabad72f95e8ab6e15146861fa4144dd", "status": "affected", "versionType": "git"}, {"version": "5dfd283f4651d04dbb70ceb9ae5c4a30eda3c52a", "status": "affected", "versionType": "git"}, {"version": "de7921631ff323369aa63a4324695ab54ea4047e", "status": "affected", "versionType": "git"}, {"version": "6.1.141", "lessThan": "6.2", "status": "affected", "versionType": "semver"}, {"version": "6.6.93", "lessThan": "6.7", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/unix/garbage.c"], "versions": [{"version": "6.10", "status": "affected"}, {"version": "0", "lessThan": "6.10", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.54", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.8", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "6.10", "versionEndExcluding": "6.18.54"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10", "versionEndExcluding": "7.2.8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10", "versionEndExcluding": "7.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1.141"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.93"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/b8f71d69380a5fbc734c868acbeb560f1de1766f"}, {"url": "https://git.kernel.org/stable/c/be550ee108ad80828aa61280400bedfc7e7c39d3"}, {"url": "https://git.kernel.org/stable/c/4a4263dfeabad72f95e8ab6e15146861fa4144dd"}], "title": "af_unix: Unify scc_index when finalising SCC in __unix_walk_scc().", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/unix/garbage.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "b8f71d69380a5fbc734c868acbeb560f1de1766f", "status": "affected", "version": "4090fa373f0e763c43610853d2774b5979915959", "versionType": "git"}, {"lessThan": "be550ee108ad80828aa61280400bedfc7e7c39d3", "status": "affected", "version": "4090fa373f0e763c43610853d2774b5979915959", "versionType": "git"}, {"lessThan": "4a4263dfeabad72f95e8ab6e15146861fa4144dd", "status": "affected", "version": "4090fa373f0e763c43610853d2774b5979915959", "versionType": "git"}, {"status": "affected", "version": "5dfd283f4651d04dbb70ceb9ae5c4a30eda3c52a", "versionType": "git"}, {"status": "affected", "version": "de7921631ff323369aa63a4324695ab54ea4047e", "versionType": "git"}, {"lessThan": "6.2", "status": "affected", "version": "6.1.141", "versionType": "semver"}, {"lessThan": "6.7", "status": "affected", "version": "6.6.93", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/unix/garbage.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.10"}, {"lessThan": "6.10", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.54", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.8", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "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\naf_unix: Unify scc_index when finalising SCC in __unix_walk_scc().\n\nCommit bfdb01283ee8 (\"af_unix: Assign a unique index to SCC.\")\nchanged Tarjan's algorithm to update lowlink with lowlink,\nwhich is called lowpoint (unix_vertex.scc_index).\n\nunix_vertex_dead() assumes all vertices in an SCC share the same\nlowpoint, but this is not always true if an SCC has two or more\nback edges, depending on the order of DFS.\n\nFor example, the graph below has two back edges from B to A\nand from C to B.\n\n A --> B --> C\n ^ | ^ |\n `----' `----'\n\nIf DFS walks through A -> B -> C -> B (-> C -> B) -> A (-> B -> A),\neach index and scc_index will be updated as follows.\n\n A --> B --> C C = (3, 3) (index, scc_index)\n B = (2, 2)\n A = (1, 1)\n\n A ... B ... C C = (3, 2)<-.\n ^ | B = (2, 2) -'\n `----' A = (1, 1)\n\n A ... B ... C C = (3, 2)\n ^ | . . B = (2, 1)<-.\n `----' .... A = (1, 1) -'\n\nThen, unix_vertex_dead() thinks that B is passed to another\nSCC with scc_index 2, and the SCC is not garbage-collected.\n\nThis does not happen if DFS walks in a different order below\nor starts from B.\n\n 1 3\n A --> B --> C\n ^ | ^ |\n `----' `----'\n 2 4\n\nLet's unify scc_index across the SCC when finalising it.\n\nNote that updating v->index was previously done in unix_scc_dead(),\nwhen called from __unix_walk_scc(), just to save one loop. Since\n__unix_walk_scc() now iterates over the SCC anyway, the update is\nmoved back to __unix_walk_scc() and 'fast' argument is dropped."}], "id": "CVE-2026-98289", "lastModified": "2026-10-19T10:18:30.560", "metrics": {}, "published": "2026-10-06T09:18:19.177", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4a4263dfeabad72f95e8ab6e15146861fa4144dd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b8f71d69380a5fbc734c868acbeb560f1de1766f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/be550ee108ad80828aa61280400bedfc7e7c39d3"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: af_unix: Unify scc_index when finalising SCC in __unix_walk_scc()", "id": "2546528", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2546528"}, "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"}, "cwe": "CWE-772", "details": ["In the Linux kernel, the following vulnerability has been resolved:\naf_unix: Unify scc_index when finalising SCC in __unix_walk_scc().\nCommit bfdb01283ee8 (\"af_unix: Assign a unique index to SCC.\")\nchanged Tarjan's algorithm to update lowlink with lowlink,\nwhich is called lowpoint (unix_vertex.scc_index).\nunix_vertex_dead() assumes all vertices in an SCC share the same\nlowpoint, but this is not always true if an SCC has two or more\nback edges, depending on the order of DFS.\nFor example, the graph below has two back edges from B to A\nand from C to B.\nA --> B --> C\n^ | ^ |\n`----' `----'\nIf DFS walks through A -> B -> C -> B (-> C -> B) -> A (-> B -> A),\neach index and scc_index will be updated as follows.\nA --> B --> C C = (3, 3) (index, scc_index)\nB = (2, 2)\nA = (1, 1)\nA ... B ... C C = (3, 2)<-.\n^ | B = (2, 2) -'\n`----' A = (1, 1)\nA ... B ... C C = (3, 2)\n^ | . . B = (2, 1)<-.\n`----' .... A = (1, 1) -'\nThen, unix_vertex_dead() thinks that B is passed to another\nSCC with scc_index 2, and the SCC is not garbage-collected.\nThis does not happen if DFS walks in a different order below\nor starts from B.\n1 3\nA --> B --> C\n^ | ^ |\n`----' `----'\n2 4\nLet's unify scc_index across the SCC when finalising it.\nNote that updating v->index was previously done in unix_scc_dead(),\nwhen called from __unix_walk_scc(), just to save one loop. Since\n__unix_walk_scc() now iterates over the SCC anyway, the update is\nmoved back to __unix_walk_scc() and 'fast' argument is dropped.", "A flaw was found in the Linux kernel's UNIX domain socket (af_unix) subsystem. A logic error in the socket garbage collection algorithm can prevent cyclical socket references from being properly identified and reclaimed. A local user could exploit this flaw to cause a resource leak, potentially leading to a Denial of Service (DoS) through system memory exhaustion."], "name": "CVE-2026-98289", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-10-06T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98289\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98289\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98289.mbox"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4090fa373f0e763c43610853d2774b5979915959,b8f71d69380a5fbc734c868acbeb560f1de1766f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4090fa373f0e763c43610853d2774b5979915959,be550ee108ad80828aa61280400bedfc7e7c39d3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4090fa373f0e763c43610853d2774b5979915959,4a4263dfeabad72f95e8ab6e15146861fa4144dd)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "5dfd283f4651d04dbb70ceb9ae5c4a30eda3c52a"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "de7921631ff323369aa63a4324695ab54ea4047e"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.1.141,6.2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.6.93,6.7)"}}], "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": "6.10"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.10)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.54,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.8,7.2.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.3-rc4,*]"}}], "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": "2026-10-06T14:15:17.995590+00:00", "updated": "2026-10-09T14:45:07.349127+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}