CVE-2026-89776

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89776", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.765Z", "datePublished": "2026-09-16T08:48:17.084Z", "dateUpdated": "2026-10-19T08:52:28.559Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:52:28.559Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvxlan: vnifilter: enforce exact length of GROUP/GROUP6 attributes\n\nThe VXLAN VNI filter entry policy declares the GROUP/GROUP6 address\nattributes as NLA_BINARY with only a maximum length, so validate_nla()\naccepts a payload shorter than the address. The GROUP consumer reads it\nwith nla_get_in_addr(), an unconditional 4-byte load, so a short\nattribute over-reads up to 3 bytes of uninitialised slab data, which are\nstored into remote_ip and echoed back via RTM_GETTUNNEL, disclosing\nkernel memory.\n\nSwitch both entries to NLA_POLICY_EXACT_LEN() so the validator rejects\nany GROUP/GROUP6 that is not exactly 4 / 16 bytes; a valid address is\nalways sent at full width."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/vxlan/vxlan_vnifilter.c"], "versions": [{"version": "f9c4bb0b245cee35ef66f75bf409c9573d934cf9", "lessThan": "e12c4663529699f457b2988c1dfedf4d13b3b3be", "status": "affected", "versionType": "git"}, {"version": "f9c4bb0b245cee35ef66f75bf409c9573d934cf9", "lessThan": "47bfcc871576eaef6c8edab6749acd4b317306ea", "status": "affected", "versionType": "git"}, {"version": "f9c4bb0b245cee35ef66f75bf409c9573d934cf9", "lessThan": "a9ec10815199f9879ba080241dc555efb1daf324", "status": "affected", "versionType": "git"}, {"version": "f9c4bb0b245cee35ef66f75bf409c9573d934cf9", "lessThan": "daebc7064a1b4c12c98e52c4bceede7f2fcd573c", "status": "affected", "versionType": "git"}, {"version": "f9c4bb0b245cee35ef66f75bf409c9573d934cf9", "lessThan": "ad32e564c62ebf5ba76dd60a22af52c69d54d17b", "status": "affected", "versionType": "git"}, {"version": "f9c4bb0b245cee35ef66f75bf409c9573d934cf9", "lessThan": "984f831dda31b3a18f47454cf64989f65402879e", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/vxlan/vxlan_vnifilter.c"], "versions": [{"version": "5.18", "status": "affected"}, {"version": "0", "lessThan": "5.18", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.188", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.157", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.110", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.52", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.6", "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": "5.18", "versionEndExcluding": "6.1.188"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.6.157"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.12.110"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.18.52"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "7.2.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/e12c4663529699f457b2988c1dfedf4d13b3b3be"}, {"url": "https://git.kernel.org/stable/c/47bfcc871576eaef6c8edab6749acd4b317306ea"}, {"url": "https://git.kernel.org/stable/c/a9ec10815199f9879ba080241dc555efb1daf324"}, {"url": "https://git.kernel.org/stable/c/daebc7064a1b4c12c98e52c4bceede7f2fcd573c"}, {"url": "https://git.kernel.org/stable/c/ad32e564c62ebf5ba76dd60a22af52c69d54d17b"}, {"url": "https://git.kernel.org/stable/c/984f831dda31b3a18f47454cf64989f65402879e"}], "title": "vxlan: vnifilter: enforce exact length of GROUP/GROUP6 attributes", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/net/vxlan/vxlan_vnifilter.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "e12c4663529699f457b2988c1dfedf4d13b3b3be", "status": "affected", "version": "f9c4bb0b245cee35ef66f75bf409c9573d934cf9", "versionType": "git"}, {"lessThan": "47bfcc871576eaef6c8edab6749acd4b317306ea", "status": "affected", "version": "f9c4bb0b245cee35ef66f75bf409c9573d934cf9", "versionType": "git"}, {"lessThan": "a9ec10815199f9879ba080241dc555efb1daf324", "status": "affected", "version": "f9c4bb0b245cee35ef66f75bf409c9573d934cf9", "versionType": "git"}, {"lessThan": "daebc7064a1b4c12c98e52c4bceede7f2fcd573c", "status": "affected", "version": "f9c4bb0b245cee35ef66f75bf409c9573d934cf9", "versionType": "git"}, {"lessThan": "ad32e564c62ebf5ba76dd60a22af52c69d54d17b", "status": "affected", "version": "f9c4bb0b245cee35ef66f75bf409c9573d934cf9", "versionType": "git"}, {"lessThan": "984f831dda31b3a18f47454cf64989f65402879e", "status": "affected", "version": "f9c4bb0b245cee35ef66f75bf409c9573d934cf9", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/net/vxlan/vxlan_vnifilter.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.18"}, {"lessThan": "5.18", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.188", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.157", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.110", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.52", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.6", "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\nvxlan: vnifilter: enforce exact length of GROUP/GROUP6 attributes\n\nThe VXLAN VNI filter entry policy declares the GROUP/GROUP6 address\nattributes as NLA_BINARY with only a maximum length, so validate_nla()\naccepts a payload shorter than the address. The GROUP consumer reads it\nwith nla_get_in_addr(), an unconditional 4-byte load, so a short\nattribute over-reads up to 3 bytes of uninitialised slab data, which are\nstored into remote_ip and echoed back via RTM_GETTUNNEL, disclosing\nkernel memory.\n\nSwitch both entries to NLA_POLICY_EXACT_LEN() so the validator rejects\nany GROUP/GROUP6 that is not exactly 4 / 16 bytes; a valid address is\nalways sent at full width."}], "id": "CVE-2026-89776", "lastModified": "2026-10-19T09:18:20.823", "metrics": {}, "published": "2026-09-16T09:17:07.950", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/47bfcc871576eaef6c8edab6749acd4b317306ea"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/984f831dda31b3a18f47454cf64989f65402879e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a9ec10815199f9879ba080241dc555efb1daf324"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ad32e564c62ebf5ba76dd60a22af52c69d54d17b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/daebc7064a1b4c12c98e52c4bceede7f2fcd573c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e12c4663529699f457b2988c1dfedf4d13b3b3be"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f9c4bb0b245cee35ef66f75bf409c9573d934cf9,e12c4663529699f457b2988c1dfedf4d13b3b3be)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f9c4bb0b245cee35ef66f75bf409c9573d934cf9,47bfcc871576eaef6c8edab6749acd4b317306ea)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f9c4bb0b245cee35ef66f75bf409c9573d934cf9,a9ec10815199f9879ba080241dc555efb1daf324)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f9c4bb0b245cee35ef66f75bf409c9573d934cf9,daebc7064a1b4c12c98e52c4bceede7f2fcd573c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f9c4bb0b245cee35ef66f75bf409c9573d934cf9,ad32e564c62ebf5ba76dd60a22af52c69d54d17b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f9c4bb0b245cee35ef66f75bf409c9573d934cf9,984f831dda31b3a18f47454cf64989f65402879e)"}}], "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": "5.18"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,5.18)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.1.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.6.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,7.2.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,*]"}}], "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": "2026-09-16T12:15:07.709663+00:00", "updated": "2026-09-20T05:00:13.117986+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-125", "CWE-200"]}