{"schema":"threatline.record/2","record":{"id":"CVE-2026-98532","aliases":[],"summary":"ipv6: do not let ipv6_find_hdr() return an offset past the packet end","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: do not let ipv6_find_hdr() return an offset past the packet end\n\nipv6_find_hdr() walks the extension header chain, skipping each header by\nthe length that header itself declares.  ipv6_optlen() returns up to 2048,\nand the skip is never checked against skb->len, so the offset stored in\n*offset can point past the end of the packet.\n\nopenvswitch installs that offset as the transport header, and\nupdate_ipv6_checksum() then reads and writes the transport checksum field\nout of bounds:\n\n  BUG: KASAN: slab-use-after-free in inet_proto_csum_replace16+0x445/0x470\n  Read of size 2 at addr ffff88810b754b06 by task ovs_ipv6_oob/629\n  CPU: 4 UID: 1000 PID: 629 Comm: ovs_ipv6_oob Tainted: G N 7.3.0-rc3+ #348\n  Call Trace:\n   inet_proto_csum_replace16+0x445/0x470\n   set_ipv6_addr+0x3dd/0x460\n   do_execute_actions+0x6a3d/0x7c40\n   ovs_execute_actions+0xfd/0x480\n   ovs_packet_cmd_execute+0xc38/0xf20\n   genl_rcv_msg+0x59e/0x870\n   netlink_rcv_skb+0x18b/0x450\n   genl_rcv+0x2d/0x40\n   netlink_unicast+0x6bc/0xa20\n\n  The buggy address belongs to the object at ffff88810b754980\n   which belongs to the cache skbuff_small_head of size 704\n  The buggy address is located 390 bytes inside of\n   freed 704-byte region [ffff88810b754980, ffff88810b754c40)\n\nOther callers use that offset too, so bound it here rather than in one\ncaller.\n\nReject a header whose declared length does not fit in the packet.\nipv6_find_hdr() already fails with -EBADMSG on a malformed chain, so this\nadds no new failure mode.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98532","source_modified_at":"2026-10-19T09:21:15.825Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"f8f626754ebeca613cf1af2e6f890cfde0e74d5b","lessThan":"ca96b38730e31357ef4a9d76af1336958ac670d7","status":"affected","versionType":"git"},{"version":"f8f626754ebeca613cf1af2e6f890cfde0e74d5b","lessThan":"531255de8971c06d5d5986f85fdc2525d707ba71","status":"affected","versionType":"git"},{"version":"f8f626754ebeca613cf1af2e6f890cfde0e74d5b","lessThan":"543354c6efb27eae3372a3a9674aeaa2a86e2b2c","status":"affected","versionType":"git"},{"version":"f8f626754ebeca613cf1af2e6f890cfde0e74d5b","lessThan":"dc92cb972e86790b8078337ec41015b748b8f8e5","status":"affected","versionType":"git"},{"version":"f8f626754ebeca613cf1af2e6f890cfde0e74d5b","lessThan":"1c70275ca87e769e1a52abc644d61372d8c016cb","status":"affected","versionType":"git"},{"version":"f8f626754ebeca613cf1af2e6f890cfde0e74d5b","lessThan":"1d42828565889632068fbc2983c34d57c66af4e0","status":"affected","versionType":"git"},{"version":"f8f626754ebeca613cf1af2e6f890cfde0e74d5b","lessThan":"4254d5878c320c19961dd0b8e1d0aca4800d8b7d","status":"affected","versionType":"git"},{"version":"f8f626754ebeca613cf1af2e6f890cfde0e74d5b","lessThan":"ee319bd3a0e976af5087cbe59ebc50a66f31d202","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98532","source_modified_at":"2026-10-19T09:21:15.825Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"3.8","status":"affected"},{"version":"0","lessThan":"3.8","status":"unaffected","versionType":"semver"},{"version":"5.10.271","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.222","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.189","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.158","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.112","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.55","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.9","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98532","source_modified_at":"2026-10-19T09:21:15.825Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"531255de8971c06d5d5986f85fdc2525d707ba71","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98532","source_modified_at":"2026-10-19T09:21:15.825Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"543354c6efb27eae3372a3a9674aeaa2a86e2b2c","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98532","source_modified_at":"2026-10-19T09:21:15.825Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"1c70275ca87e769e1a52abc644d61372d8c016cb","basis":"first unaffected version stated in the CVE record"},{"source":"CVE 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List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98532","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T09:21:15.825Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98532","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/ca96b38730e31357ef4a9d76af1336958ac670d7"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/531255de8971c06d5d5986f85fdc2525d707ba71"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/543354c6efb27eae3372a3a9674aeaa2a86e2b2c"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/dc92cb972e86790b8078337ec41015b748b8f8e5"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/1c70275ca87e769e1a52abc644d61372d8c016cb"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/1d42828565889632068fbc2983c34d57c66af4e0"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/4254d5878c320c19961dd0b8e1d0aca4800d8b7d"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/ee319bd3a0e976af5087cbe59ebc50a66f31d202"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-19T09:21:15.825Z","content_hash":"1b6e42542ba23886e91cc3a5f7e94f43f63c905c09664f2abbe8fb7fc5cb383a"}}