CVE-2026-98102

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98102", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.315Z", "datePublished": "2026-09-25T10:35:53.332Z", "dateUpdated": "2026-10-19T09:13:54.775Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:13:54.775Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: mcast: fix RCU list diversion in ip6_mc_del1_src()\n\nWhen removing a source filter whose count reaches zero, ip6_mc_del1_src()\nunlinks psf from pmc->mca_sources. If the filter was previously active,\nthe code moved psf directly into pmc->mca_tomb by updating psf->sf_next.\n\nBecause pmc->mca_sources is traversed locklessly under RCU (e.g. by\nipv6_chk_mcast_addr()), mutating psf->sf_next before a grace period\nelapses diverts concurrent readers to the tombstone list. Consequently,\nreaders miss remaining active sources in pmc->mca_sources and improperly\nexamine deleted tombstone entries.\n\nFix this by allocating a new tombstone node for pmc->mca_tomb (as done\nin sf_setstate()) and retiring the original psf via kfree_rcu()."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ipv6/mcast.c"], "versions": [{"version": "4b200e398953c237c86d32bf26d4cb2a96556a6f", "lessThan": "c3343cd7ec8706c221e52b782f386b9af14a928a", "status": "affected", "versionType": "git"}, {"version": "4b200e398953c237c86d32bf26d4cb2a96556a6f", "lessThan": "4352737297b262e8367675c19a7dc6a9f53c97af", "status": "affected", "versionType": "git"}, {"version": "4b200e398953c237c86d32bf26d4cb2a96556a6f", "lessThan": "8d4fe5c13f5056faa6deb09a90e24a89f9ebfad4", "status": "affected", "versionType": "git"}, {"version": "4b200e398953c237c86d32bf26d4cb2a96556a6f", "lessThan": "5149c60c406595b56fda0c6e9aae7fd287f636aa", "status": "affected", "versionType": "git"}, {"version": "4b200e398953c237c86d32bf26d4cb2a96556a6f", "lessThan": "93b49239840b91313adbd77b8b52993eff2d08c1", "status": "affected", "versionType": "git"}, {"version": "86c49119f0353f857cc08030ec9e4ebaab3d5a64", "status": "affected", "versionType": "git"}, {"version": "5.10.261", "lessThan": "5.11", "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/ipv6/mcast.c"], "versions": [{"version": "5.13", "status": "affected"}, {"version": "0", "lessThan": "5.13", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.158", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.111", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.53", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.7", "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": "5.13", "versionEndExcluding": "6.6.158"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "6.12.111"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "6.18.53"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "7.2.7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "7.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10.261"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/c3343cd7ec8706c221e52b782f386b9af14a928a"}, {"url": "https://git.kernel.org/stable/c/4352737297b262e8367675c19a7dc6a9f53c97af"}, {"url": "https://git.kernel.org/stable/c/8d4fe5c13f5056faa6deb09a90e24a89f9ebfad4"}, {"url": "https://git.kernel.org/stable/c/5149c60c406595b56fda0c6e9aae7fd287f636aa"}, {"url": "https://git.kernel.org/stable/c/93b49239840b91313adbd77b8b52993eff2d08c1"}], "title": "ipv6: mcast: fix RCU list diversion in ip6_mc_del1_src()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/ipv6/mcast.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "c3343cd7ec8706c221e52b782f386b9af14a928a", "status": "affected", "version": "4b200e398953c237c86d32bf26d4cb2a96556a6f", "versionType": "git"}, {"lessThan": "4352737297b262e8367675c19a7dc6a9f53c97af", "status": "affected", "version": "4b200e398953c237c86d32bf26d4cb2a96556a6f", "versionType": "git"}, {"lessThan": "8d4fe5c13f5056faa6deb09a90e24a89f9ebfad4", "status": "affected", "version": "4b200e398953c237c86d32bf26d4cb2a96556a6f", "versionType": "git"}, {"lessThan": "5149c60c406595b56fda0c6e9aae7fd287f636aa", "status": "affected", "version": "4b200e398953c237c86d32bf26d4cb2a96556a6f", "versionType": "git"}, {"lessThan": "93b49239840b91313adbd77b8b52993eff2d08c1", "status": "affected", "version": "4b200e398953c237c86d32bf26d4cb2a96556a6f", "versionType": "git"}, {"status": "affected", "version": "86c49119f0353f857cc08030ec9e4ebaab3d5a64", "versionType": "git"}, {"lessThan": "5.11", "status": "affected", "version": "5.10.261", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/ipv6/mcast.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.13"}, {"lessThan": "5.13", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.158", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.111", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.53", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.7", "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\nipv6: mcast: fix RCU list diversion in ip6_mc_del1_src()\n\nWhen removing a source filter whose count reaches zero, ip6_mc_del1_src()\nunlinks psf from pmc->mca_sources. If the filter was previously active,\nthe code moved psf directly into pmc->mca_tomb by updating psf->sf_next.\n\nBecause pmc->mca_sources is traversed locklessly under RCU (e.g. by\nipv6_chk_mcast_addr()), mutating psf->sf_next before a grace period\nelapses diverts concurrent readers to the tombstone list. Consequently,\nreaders miss remaining active sources in pmc->mca_sources and improperly\nexamine deleted tombstone entries.\n\nFix this by allocating a new tombstone node for pmc->mca_tomb (as done\nin sf_setstate()) and retiring the original psf via kfree_rcu()."}], "id": "CVE-2026-98102", "lastModified": "2026-10-19T10:18:07.420", "metrics": {}, "published": "2026-09-25T11:17:39.943", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4352737297b262e8367675c19a7dc6a9f53c97af"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5149c60c406595b56fda0c6e9aae7fd287f636aa"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8d4fe5c13f5056faa6deb09a90e24a89f9ebfad4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/93b49239840b91313adbd77b8b52993eff2d08c1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c3343cd7ec8706c221e52b782f386b9af14a928a"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Undergoing Analysis"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4b200e398953c237c86d32bf26d4cb2a96556a6f,4352737297b262e8367675c19a7dc6a9f53c97af)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4b200e398953c237c86d32bf26d4cb2a96556a6f,8d4fe5c13f5056faa6deb09a90e24a89f9ebfad4)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4b200e398953c237c86d32bf26d4cb2a96556a6f,5149c60c406595b56fda0c6e9aae7fd287f636aa)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4b200e398953c237c86d32bf26d4cb2a96556a6f,93b49239840b91313adbd77b8b52993eff2d08c1)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "86c49119f0353f857cc08030ec9e4ebaab3d5a64"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.10.261,5.11)"}}], "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": "5.13"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.13)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.111,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.53,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.7,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc2,*]"}}], "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": "2026-09-25T11:30:16.061684+00:00", "updated": "2026-09-25T13:00:15.564194+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-362"]}