{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2026-98532", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-98532", "idYear": 2026, "status": "PUBLISHED", "publishedAt": "2026-10-18T15:17:50.490Z", "updatedAt": "2026-10-19T09:21:15.825Z", "importedAt": "2026-10-24T01:58:41.756Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "ipv6: do not let ipv6_find_hdr() return an offset past the packet end", "summary": "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": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "f8f626754ebeca613cf1af2e6f890cfde0e74d5b", "status": "affected", "versionType": "git", "lessThan": "ca96b38730e31357ef4a9d76af1336958ac670d7" }, { "version": "f8f626754ebeca613cf1af2e6f890cfde0e74d5b", "status": "affected", "versionType": "git", "lessThan": "531255de8971c06d5d5986f85fdc2525d707ba71" }, { "version": "f8f626754ebeca613cf1af2e6f890cfde0e74d5b", "status": "affected", "versionType": "git", "lessThan": "543354c6efb27eae3372a3a9674aeaa2a86e2b2c" }, { "version": "f8f626754ebeca613cf1af2e6f890cfde0e74d5b", "status": "affected", "versionType": "git", "lessThan": "dc92cb972e86790b8078337ec41015b748b8f8e5" }, { "version": "f8f626754ebeca613cf1af2e6f890cfde0e74d5b", "status": "affected", "versionType": "git", "lessThan": "1c70275ca87e769e1a52abc644d61372d8c016cb" }, { "version": "f8f626754ebeca613cf1af2e6f890cfde0e74d5b", "status": "affected", "versionType": "git", "lessThan": "1d42828565889632068fbc2983c34d57c66af4e0" }, { "version": "f8f626754ebeca613cf1af2e6f890cfde0e74d5b", "status": "affected", "versionType": "git", "lessThan": "4254d5878c320c19961dd0b8e1d0aca4800d8b7d" }, { "version": "f8f626754ebeca613cf1af2e6f890cfde0e74d5b", "status": "affected", "versionType": "git", "lessThan": "ee319bd3a0e976af5087cbe59ebc50a66f31d202" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "3.8", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "3.8" }, { "version": "5.10.271", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.222", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.189", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.158", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.112", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.18.55", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.18.*" }, { "version": "7.2.9", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "7.2.*" }, { "version": "7.3", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }