{"api_version":"1","generated_at":"2026-10-21T18:42:59+00:00","cve":"CVE-2026-98532","urls":{"html":"https://cve.report/CVE-2026-98532","api":"https://cve.report/api/cve/CVE-2026-98532.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-98532","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-98532"},"summary":{"title":"ipv6: do not let ipv6_find_hdr() return an offset past the packet end","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-10-18 16:17:04","updated_at":"2026-10-18 16:17:04"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/ca96b38730e31357ef4a9d76af1336958ac670d7","name":"https://git.kernel.org/stable/c/ca96b38730e31357ef4a9d76af1336958ac670d7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1d42828565889632068fbc2983c34d57c66af4e0","name":"https://git.kernel.org/stable/c/1d42828565889632068fbc2983c34d57c66af4e0","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/543354c6efb27eae3372a3a9674aeaa2a86e2b2c","name":"https://git.kernel.org/stable/c/543354c6efb27eae3372a3a9674aeaa2a86e2b2c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/dc92cb972e86790b8078337ec41015b748b8f8e5","name":"https://git.kernel.org/stable/c/dc92cb972e86790b8078337ec41015b748b8f8e5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/531255de8971c06d5d5986f85fdc2525d707ba71","name":"https://git.kernel.org/stable/c/531255de8971c06d5d5986f85fdc2525d707ba71","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4254d5878c320c19961dd0b8e1d0aca4800d8b7d","name":"https://git.kernel.org/stable/c/4254d5878c320c19961dd0b8e1d0aca4800d8b7d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ee319bd3a0e976af5087cbe59ebc50a66f31d202","name":"https://git.kernel.org/stable/c/ee319bd3a0e976af5087cbe59ebc50a66f31d202","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1c70275ca87e769e1a52abc644d61372d8c016cb","name":"https://git.kernel.org/stable/c/1c70275ca87e769e1a52abc644d61372d8c016cb","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98532","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98532","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f8f626754ebeca613cf1af2e6f890cfde0e74d5b ca96b38730e31357ef4a9d76af1336958ac670d7 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f8f626754ebeca613cf1af2e6f890cfde0e74d5b 531255de8971c06d5d5986f85fdc2525d707ba71 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f8f626754ebeca613cf1af2e6f890cfde0e74d5b 543354c6efb27eae3372a3a9674aeaa2a86e2b2c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f8f626754ebeca613cf1af2e6f890cfde0e74d5b dc92cb972e86790b8078337ec41015b748b8f8e5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f8f626754ebeca613cf1af2e6f890cfde0e74d5b 1c70275ca87e769e1a52abc644d61372d8c016cb git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f8f626754ebeca613cf1af2e6f890cfde0e74d5b 1d42828565889632068fbc2983c34d57c66af4e0 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f8f626754ebeca613cf1af2e6f890cfde0e74d5b 4254d5878c320c19961dd0b8e1d0aca4800d8b7d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f8f626754ebeca613cf1af2e6f890cfde0e74d5b ee319bd3a0e976af5087cbe59ebc50a66f31d202 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3.8","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 3.8 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.271 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.222 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.189 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.158 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.112 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.55 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.9 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/ipv6/exthdrs_core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"ca96b38730e31357ef4a9d76af1336958ac670d7","status":"affected","version":"f8f626754ebeca613cf1af2e6f890cfde0e74d5b","versionType":"git"},{"lessThan":"531255de8971c06d5d5986f85fdc2525d707ba71","status":"affected","version":"f8f626754ebeca613cf1af2e6f890cfde0e74d5b","versionType":"git"},{"lessThan":"543354c6efb27eae3372a3a9674aeaa2a86e2b2c","status":"affected","version":"f8f626754ebeca613cf1af2e6f890cfde0e74d5b","versionType":"git"},{"lessThan":"dc92cb972e86790b8078337ec41015b748b8f8e5","status":"affected","version":"f8f626754ebeca613cf1af2e6f890cfde0e74d5b","versionType":"git"},{"lessThan":"1c70275ca87e769e1a52abc644d61372d8c016cb","status":"affected","version":"f8f626754ebeca613cf1af2e6f890cfde0e74d5b","versionType":"git"},{"lessThan":"1d42828565889632068fbc2983c34d57c66af4e0","status":"affected","version":"f8f626754ebeca613cf1af2e6f890cfde0e74d5b","versionType":"git"},{"lessThan":"4254d5878c320c19961dd0b8e1d0aca4800d8b7d","status":"affected","version":"f8f626754ebeca613cf1af2e6f890cfde0e74d5b","versionType":"git"},{"lessThan":"ee319bd3a0e976af5087cbe59ebc50a66f31d202","status":"affected","version":"f8f626754ebeca613cf1af2e6f890cfde0e74d5b","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/ipv6/exthdrs_core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"3.8"},{"lessThan":"3.8","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.271","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.222","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.189","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.158","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.112","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.55","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.9","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.271","versionStartIncluding":"3.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.222","versionStartIncluding":"3.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.189","versionStartIncluding":"3.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.158","versionStartIncluding":"3.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.112","versionStartIncluding":"3.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.55","versionStartIncluding":"3.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.9","versionStartIncluding":"3.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3","versionStartIncluding":"3.8","vulnerable":true}],"negate":false,"operator":"OR"}]}],"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."}],"providerMetadata":{"dateUpdated":"2026-10-19T09:21:15.825Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"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"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-98532","datePublished":"2026-10-18T15:17:50.490Z","dateReserved":"2026-09-25T10:25:14.355Z","dateUpdated":"2026-10-19T09:21:15.825Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-18 16:17:04","lastModifiedDate":"2026-10-18 16:17:04","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"98532","Ordinal":"1","Title":"ipv6: do not let ipv6_find_hdr() return an offset past the packe","CVE":"CVE-2026-98532","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"98532","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"ipv6: do not let ipv6_find_hdr() return an offset past the packe"}]}}}