{ "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-2026-68117", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-68117", "idYear": 2026, "status": "PUBLISHED", "publishedAt": "2026-08-10T11:58:36.675Z", "updatedAt": "2026-10-19T20:58:51.459Z", "importedAt": "2026-10-24T01:58:25.636Z", "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": "tipc: clear sock->sk on the failed-insert path in tipc_sk_create()", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: clear sock->sk on the failed-insert path in tipc_sk_create()\n\nWhen tipc_sk_create() fails to insert the new socket (tipc_sk_insert()\nreturns non-zero), its error path frees the sk with sk_free() but leaves\nsock->sk pointing at the freed object:\n\n\tif (tipc_sk_insert(tsk)) {\n\t\tsk_free(sk);\n\t\tpr_warn(\"Socket create failed; port number exhausted\\n\");\n\t\treturn -EINVAL;\n\t}\n\nThis is harmless for plain socket(): the syscall layer clears sock->ops\nbefore releasing, so tipc_release() is never called. It is not harmless\non the accept() path. tipc_accept() creates the pre-allocated child\nsocket with tipc_sk_create(net, new_sock, 0, kern); on failure it leaves\nnew_sock->sk dangling and new_sock->ops non-NULL, and do_accept() then\nfput()s the new file, so __sock_release() -> tipc_release() runs\nlock_sock(new_sock->sk) on the freed sk -- a use-after-free write of the\nsk_lock spinlock.\n\ntipc_release() already guards this exact \"failed accept() releases a\npre-allocated child\" case with \"if (sk == NULL) return 0;\", but the\nguard is bypassed because tipc_sk_create() left sock->sk non-NULL\n(dangling) rather than NULL.\n\nClear sock->sk on the failed-insert path so the existing tipc_release()\nNULL check fires and the use-after-free is avoided.\n\nThe tipc_sk_insert() failure is reached when the per-netns socket\nrhashtable hits its max_size (tsk_rht_params.max_size = 1048576, ~2M\nelements) -- i.e. once a netns holds ~2M TIPC sockets every insert\nreturns -E2BIG.\n\n BUG: KASAN: slab-use-after-free in lock_sock_nested (net/core/sock.c:3839)\n Write of size 8 at addr ffff8880047cdc38 by task init/1\n lock_sock_nested (net/core/sock.c:3839)\n tipc_release (net/tipc/socket.c:638)\n __sock_release (net/socket.c:710)\n sock_close (net/socket.c:1501)\n __fput (fs/file_table.c:512)\n Allocated by task 1:\n sk_alloc (net/core/sock.c:2308)\n tipc_sk_create (net/tipc/socket.c:487)\n tipc_accept (net/tipc/socket.c:2744)\n do_accept (net/socket.c:2034)\n Freed by task 1:\n __sk_destruct (net/core/sock.c:2391)\n tipc_sk_create (net/tipc/socket.c:504)\n tipc_accept (net/tipc/socket.c:2744)\n do_accept (net/socket.c:2034)", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "efa78f2ae363428525fb4981bb63c555ee79f3c7", "status": "affected", "versionType": "git", "lessThan": "efebc23e9b29e3e5a9e2127dd066929f7f0d315e" }, { "version": "833ecd0eae76eadf81d6d747bb5bc992d1151867", "status": "affected", "versionType": "git", "lessThan": "8d6f26d48e61ef34f1921289401dbf36b10816af" }, { "version": "00aff3590fc0a73bddd3b743863c14e76fd35c0c", "status": "affected", "versionType": "git", "lessThan": "82f59aa27f33bd014a7d8739371ab5712d15e33b" }, { "version": "00aff3590fc0a73bddd3b743863c14e76fd35c0c", "status": "affected", "versionType": "git", "lessThan": "b07d87b31631edb6529e6cdcca790a7489d1250d" }, { "version": "00aff3590fc0a73bddd3b743863c14e76fd35c0c", "status": "affected", "versionType": "git", "lessThan": "dd29891ed840f6b8d020b759d0dc4a00b1d6e4ea" }, { "version": "00aff3590fc0a73bddd3b743863c14e76fd35c0c", "status": "affected", "versionType": "git", "lessThan": "5f5a41a48dbf9eda57b67ce23e548602cf7195a6" }, { "version": "00aff3590fc0a73bddd3b743863c14e76fd35c0c", "status": "affected", "versionType": "git", "lessThan": "f9596b1566616a8be0592dbceccb6344a7c6f6bb" }, { "version": "00aff3590fc0a73bddd3b743863c14e76fd35c0c", "status": "affected", "versionType": "git", "lessThan": "ba0533fc163f905fe817cfabdf8ed4058da44800" }, { "version": "638fa20b618b2bbcf86da71231624cc82121a036", "status": "affected", "versionType": "git" }, { "version": "7bc9e7f70bc57d8f02ffea2a42094281effb15ef", "status": "affected", "versionType": "git" }, { "version": "ef488669b2652bde5b6ee5a409a5b048a2a50db4", "status": "affected", "versionType": "git" }, { "version": "4919d82f7041157a421ca9bf39a78551d5ad8a1b", "status": "affected", "versionType": "git" }, { "version": "3b2957fc09fe1ac7f07f40dd50dd5f93e3f3a7a2", "status": "affected", "versionType": "git" }, { "version": "5.10.132", "status": "affected", "versionType": "semver", "lessThan": "5.10.265" }, { "version": "5.15.56", "status": "affected", "versionType": "semver", "lessThan": "5.15.216" }, { "version": "4.9.324", "status": "affected", "versionType": "semver", "lessThan": "4.10" }, { "version": "4.14.289", "status": "affected", "versionType": "semver", "lessThan": "4.15" }, { "version": "4.19.253", "status": "affected", "versionType": "semver", "lessThan": "4.20" }, { "version": "5.4.207", "status": "affected", "versionType": "semver", "lessThan": "5.5" }, { "version": "5.18.13", "status": "affected", "versionType": "semver", "lessThan": "5.19" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "5.19", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "5.19" }, { "version": "5.10.265", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.216", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.183", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.148", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.101", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.18.42", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.18.*" }, { "version": "7.1.6", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "7.1.*" }, { "version": "7.2", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }