{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98532","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-09-25T10:25:14.355Z","datePublished":"2026-10-18T15:17:50.490Z","dateUpdated":"2026-10-19T09:21:15.825Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-10-19T09:21:15.825Z"},"descriptions":[{"lang":"en","value":"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."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv6/exthdrs_core.c"],"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"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv6/exthdrs_core.c"],"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"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.8","versionEndExcluding":"5.10.271"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.8","versionEndExcluding":"5.15.222"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.8","versionEndExcluding":"6.1.189"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.8","versionEndExcluding":"6.6.158"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.8","versionEndExcluding":"6.12.112"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.8","versionEndExcluding":"6.18.55"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.8","versionEndExcluding":"7.2.9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.8","versionEndExcluding":"7.3"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/ca96b38730e31357ef4a9d76af1336958ac670d7"},{"url":"https://git.kernel.org/stable/c/531255de8971c06d5d5986f85fdc2525d707ba71"},{"url":"https://git.kernel.org/stable/c/543354c6efb27eae3372a3a9674aeaa2a86e2b2c"},{"url":"https://git.kernel.org/stable/c/dc92cb972e86790b8078337ec41015b748b8f8e5"},{"url":"https://git.kernel.org/stable/c/1c70275ca87e769e1a52abc644d61372d8c016cb"},{"url":"https://git.kernel.org/stable/c/1d42828565889632068fbc2983c34d57c66af4e0"},{"url":"https://git.kernel.org/stable/c/4254d5878c320c19961dd0b8e1d0aca4800d8b7d"},{"url":"https://git.kernel.org/stable/c/ee319bd3a0e976af5087cbe59ebc50a66f31d202"}],"title":"ipv6: do not let ipv6_find_hdr() return an offset past the packet end","x_generator":{"engine":"bippy-1.2.0"}}}}