CVE-2026-97615

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-97615", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-24T16:01:01.159Z", "datePublished": "2026-09-25T10:22:23.234Z", "dateUpdated": "2026-10-30T12:37:38.197Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:37:38.197Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: bridge: use option bits for CFM/MRP frame handlers\n\nCFM and MRP register a global br_frame_type whose hlist_node is linked\ninto the per-bridge frame_type_list when the first MEP/MRP instance is\ncreated. Enabling the protocol on multiple bridges therefore inserts the\nsame node into multiple lists. Unregistering it on one bridge then\ncorrupts list state belonging to another.\n\nThese handlers can only be installed once per bridge, and they are\nuncommon. Track their per-bridge enable state with net_bridge option\nbits, which already live on the Rx hot cache line, and dispatch the\nmatching handler directly from the receive path. Check both bits\ntogether first as an unlikely case.\n\nRemove the generic frame_type_list and br_frame_type helpers, which\nhave had no other users since CFM and MRP were added. That shrinks\nstruct net_bridge by 8 bytes and drops the list walk from the fast\npath. When neither protocol is compiled in, BR_CFM_MRP_OPTS is 0 and\nthe compiler prunes the branch."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/bridge/br_cfm.c", "net/bridge/br_device.c", "net/bridge/br_input.c", "net/bridge/br_mrp.c", "net/bridge/br_private.h"], "versions": [{"version": "90c628dd47ff4178f645b34938470bf43d02d123", "lessThan": "935eb5581583b008d0c8e928c03021b45967439b", "status": "affected", "versionType": "git"}, {"version": "90c628dd47ff4178f645b34938470bf43d02d123", "lessThan": "158b6563c6c9dc0f368a2169911fb4f8a5ea0592", "status": "affected", "versionType": "git"}, {"version": "90c628dd47ff4178f645b34938470bf43d02d123", "lessThan": "260f99b355a44f6ce67971ebc9223b22c8f93957", "status": "affected", "versionType": "git"}, {"version": "90c628dd47ff4178f645b34938470bf43d02d123", "lessThan": "be5ead6552418d70df3a76b962ccd6ed78a31fb5", "status": "affected", "versionType": "git"}, {"version": "90c628dd47ff4178f645b34938470bf43d02d123", "lessThan": "994fd705ca498223d188024cde833739a9dddbd2", "status": "affected", "versionType": "git"}, {"version": "90c628dd47ff4178f645b34938470bf43d02d123", "lessThan": "42e033c8f30fd2923ccac3373ae70797e521dae1", "status": "affected", "versionType": "git"}, {"version": "90c628dd47ff4178f645b34938470bf43d02d123", "lessThan": "7a49e6b16f36b8e085521699adbca3e321b6dd0c", "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/bridge/br_cfm.c", "net/bridge/br_device.c", "net/bridge/br_input.c", "net/bridge/br_mrp.c", "net/bridge/br_private.h"], "versions": [{"version": "5.11", "status": "affected"}, {"version": "0", "lessThan": "5.11", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.224", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.112", "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": "5.11", "versionEndExcluding": "5.15.224"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "6.12.112"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "6.18.53"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "7.2.7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/935eb5581583b008d0c8e928c03021b45967439b"}, {"url": "https://git.kernel.org/stable/c/158b6563c6c9dc0f368a2169911fb4f8a5ea0592"}, {"url": "https://git.kernel.org/stable/c/260f99b355a44f6ce67971ebc9223b22c8f93957"}, {"url": "https://git.kernel.org/stable/c/be5ead6552418d70df3a76b962ccd6ed78a31fb5"}, {"url": "https://git.kernel.org/stable/c/994fd705ca498223d188024cde833739a9dddbd2"}, {"url": "https://git.kernel.org/stable/c/42e033c8f30fd2923ccac3373ae70797e521dae1"}, {"url": "https://git.kernel.org/stable/c/7a49e6b16f36b8e085521699adbca3e321b6dd0c"}], "title": "net: bridge: use option bits for CFM/MRP frame handlers", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/bridge/br_cfm.c", "net/bridge/br_device.c", "net/bridge/br_input.c", "net/bridge/br_mrp.c", "net/bridge/br_private.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "935eb5581583b008d0c8e928c03021b45967439b", "status": "affected", "version": "90c628dd47ff4178f645b34938470bf43d02d123", "versionType": "git"}, {"lessThan": "158b6563c6c9dc0f368a2169911fb4f8a5ea0592", "status": "affected", "version": "90c628dd47ff4178f645b34938470bf43d02d123", "versionType": "git"}, {"lessThan": "260f99b355a44f6ce67971ebc9223b22c8f93957", "status": "affected", "version": "90c628dd47ff4178f645b34938470bf43d02d123", "versionType": "git"}, {"lessThan": "be5ead6552418d70df3a76b962ccd6ed78a31fb5", "status": "affected", "version": "90c628dd47ff4178f645b34938470bf43d02d123", "versionType": "git"}, {"lessThan": "994fd705ca498223d188024cde833739a9dddbd2", "status": "affected", "version": "90c628dd47ff4178f645b34938470bf43d02d123", "versionType": "git"}, {"lessThan": "42e033c8f30fd2923ccac3373ae70797e521dae1", "status": "affected", "version": "90c628dd47ff4178f645b34938470bf43d02d123", "versionType": "git"}, {"lessThan": "7a49e6b16f36b8e085521699adbca3e321b6dd0c", "status": "affected", "version": "90c628dd47ff4178f645b34938470bf43d02d123", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/bridge/br_cfm.c", "net/bridge/br_device.c", "net/bridge/br_input.c", "net/bridge/br_mrp.c", "net/bridge/br_private.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.11"}, {"lessThan": "5.11", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.224", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.112", "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\nnet: bridge: use option bits for CFM/MRP frame handlers\n\nCFM and MRP register a global br_frame_type whose hlist_node is linked\ninto the per-bridge frame_type_list when the first MEP/MRP instance is\ncreated. Enabling the protocol on multiple bridges therefore inserts the\nsame node into multiple lists. Unregistering it on one bridge then\ncorrupts list state belonging to another.\n\nThese handlers can only be installed once per bridge, and they are\nuncommon. Track their per-bridge enable state with net_bridge option\nbits, which already live on the Rx hot cache line, and dispatch the\nmatching handler directly from the receive path. Check both bits\ntogether first as an unlikely case.\n\nRemove the generic frame_type_list and br_frame_type helpers, which\nhave had no other users since CFM and MRP were added. That shrinks\nstruct net_bridge by 8 bytes and drops the list walk from the fast\npath. When neither protocol is compiled in, BR_CFM_MRP_OPTS is 0 and\nthe compiler prunes the branch."}], "id": "CVE-2026-97615", "lastModified": "2026-10-30T13:21:09.760", "metrics": {}, "published": "2026-09-25T11:17:15.670", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/158b6563c6c9dc0f368a2169911fb4f8a5ea0592"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/260f99b355a44f6ce67971ebc9223b22c8f93957"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/42e033c8f30fd2923ccac3373ae70797e521dae1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7a49e6b16f36b8e085521699adbca3e321b6dd0c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/935eb5581583b008d0c8e928c03021b45967439b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/994fd705ca498223d188024cde833739a9dddbd2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/be5ead6552418d70df3a76b962ccd6ed78a31fb5"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: net: bridge: use option bits for CFM/MRP frame handlers", "id": "2541295", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2541295"}, "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-1108", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet: bridge: use option bits for CFM/MRP frame handlers\nCFM and MRP register a global br_frame_type whose hlist_node is linked\ninto the per-bridge frame_type_list when the first MEP/MRP instance is\ncreated. Enabling the protocol on multiple bridges therefore inserts the\nsame node into multiple lists. Unregistering it on one bridge then\ncorrupts list state belonging to another.\nThese handlers can only be installed once per bridge, and they are\nuncommon. Track their per-bridge enable state with net_bridge option\nbits, which already live on the Rx hot cache line, and dispatch the\nmatching handler directly from the receive path. Check both bits\ntogether first as an unlikely case.\nRemove the generic frame_type_list and br_frame_type helpers, which\nhave had no other users since CFM and MRP were added. That shrinks\nstruct net_bridge by 8 bytes and drops the list walk from the fast\npath. When neither protocol is compiled in, BR_CFM_MRP_OPTS is 0 and\nthe compiler prunes the branch.", "A flaw was found in the Linux kernel's network bridge subsystem, which can lead to a Denial of Service (DoS) due to list corruption. When Connectivity Fault Management (CFM) or Media Redundancy Protocol (MRP) handlers are enabled across multiple network bridges, a shared data structure is improperly linked into multiple bridge lists. A local privileged user unregistering the protocol on one bridge can corrupt the active state of another bridge, resulting in a kernel crash."], "name": "CVE-2026-97615", "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"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-09-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-97615\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-97615\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-97615.mbox"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[90c628dd47ff4178f645b34938470bf43d02d123,994fd705ca498223d188024cde833739a9dddbd2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[90c628dd47ff4178f645b34938470bf43d02d123,42e033c8f30fd2923ccac3373ae70797e521dae1)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[90c628dd47ff4178f645b34938470bf43d02d123,7a49e6b16f36b8e085521699adbca3e321b6dd0c)"}}], "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": "5.11"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.11)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.53,7.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.7,8.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.3-rc3,*]"}}], "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": "2026-09-25T18:45:17.608308+00:00", "updated": "2026-10-01T11:45:07.597378+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}