{"id":"CVE-2026-68141","summary":"net/af_iucv: fix NULL deref in afiucv_hs_callback_syn()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/af_iucv: fix NULL deref in afiucv_hs_callback_syn()\n\nafiucv_hs_callback_syn() allocates the child socket with GFP_ATOMIC.\nIf the allocation fails, nsk is NULL.\n\nThe connection-refused path is entered when the listen state check\nfails, the accept backlog is full, or nsk is NULL. The code\nunconditionally calls iucv_sock_kill(nsk) in that path.\n\niucv_sock_kill() does not accept a NULL socket pointer and immediately\ndereferences sk via sock_flag(sk, SOCK_ZAPPED). When nsk is NULL,\ncalling iucv_sock_kill(nsk) results in a NULL pointer dereference.\n\nOnly call iucv_sock_kill() when a child socket was successfully\nallocated.","modified":"2026-08-14T04:04:00.385833112Z","published":"2026-08-10T11:59:05.051Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68141.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0e857185591fe79934427c9c0c1c31dc776be134"},{"type":"WEB","url":"https://git.kernel.org/stable/c/33736ff5e7c97d3348ce812e8bd2e125d840743c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/46453b16f38ec7147351f7447e2aec6ea330f7b3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/47a5116e56a6b6fe1e909f244e39cd0fc26ceee4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8bb111f87ded6acb9837ec9b45d6f02cda94c51f"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68141.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68141"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"3881ac441f642d56503818123446f7298442236b"},{"fixed":"8bb111f87ded6acb9837ec9b45d6f02cda94c51f"},{"fixed":"46453b16f38ec7147351f7447e2aec6ea330f7b3"},{"fixed":"33736ff5e7c97d3348ce812e8bd2e125d840743c"},{"fixed":"0e857185591fe79934427c9c0c1c31dc776be134"},{"fixed":"47a5116e56a6b6fe1e909f244e39cd0fc26ceee4"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68141.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.2.0"},{"fixed":"6.6.148"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.101"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.42"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68141.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}