{"id":"CVE-2026-99116","title":"net: psp: do not inherit the Rx association on clone","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: psp: do not inherit the Rx association on clone\n\nsk->psp_assoc sits past sk_dontcopy_end, so sock_copy() copies it into\nevery socket accepted from a listener witho…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 6b46ca260e2290e3453d1355ab5b6d283d73d780 < a9f14ea73e82db743f0acf4219f499d594589288","Linux >= 6b46ca260e2290e3453d1355ab5b6d283d73d780 < c962695467d3ab9738a6508279827ec33a7d2bdf","Linux >= 6b46ca260e2290e3453d1355ab5b6d283d73d780 < 1d2929d0850fff683b8aff051275945e65f082c8","Linux 6.18"],"published":"2026-10-28","updated":"2026-10-28","sourceUpdated":"2026-10-28T10:34:33.109Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-99116","references":[{"url":"https://git.kernel.org/stable/c/a9f14ea73e82db743f0acf4219f499d594589288"},{"url":"https://git.kernel.org/stable/c/c962695467d3ab9738a6508279827ec33a7d2bdf"},{"url":"https://git.kernel.org/stable/c/1d2929d0850fff683b8aff051275945e65f082c8"}],"tags":["cve.org"],"ingestedAt":"2026-10-28T11:09:40.450Z","slug":"CVE-2026-99116","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnet: psp: do not inherit the Rx association on clone\n\nsk->psp_assoc sits past sk_dontcopy_end, so sock_copy() copies it into\nevery socket accepted from a listener without taking a reference, while\ninet_sock_destruct() puts for every inet socket. psp_twsk_init() does\nrefcount_inc() for the timewait socket, so a child closing through\nTIME_WAIT cancels its own put and leaves the association with one\nreference and N timewait sockets holding the same pointer. Closing the\nlistener frees it, and the timewait timers then put freed memory.\n\nRejecting the association on a listening socket is not sufficient: a socket\ncan acquire one while established and then be turned back into a listener,\nbecause tcp_disconnect() leaves sk->psp_assoc in place.\n\n  BUG: KASAN: slab-use-after-free in psp_twsk_assoc_free+0x6f/0xf0\n  Write of size 4 at addr ffff888110f9255c by task swapper/7/0\n   psp_twsk_assoc_free+0x6f/0xf0\n   inet_twsk_put+0xda/0x1b0\n   call_timer_fn+0x53/0x2e0\n   __run_timers+0x764/0xa80\n  Freed by task 99:\n   kfree+0x1a7/0x500\n   process_one_work+0x7ec/0x1100\n\nAn association carries a per-connection SPI and key, so a child must not\ninherit the parent's. Clear it on clone.\n\n## Affected\n\n- `Linux >= 6b46ca260e2290e3453d1355ab5b6d283d73d780 < a9f14ea73e82db743f0acf4219f499d594589288`\n- `Linux >= 6b46ca260e2290e3453d1355ab5b6d283d73d780 < c962695467d3ab9738a6508279827ec33a7d2bdf`\n- `Linux >= 6b46ca260e2290e3453d1355ab5b6d283d73d780 < 1d2929d0850fff683b8aff051275945e65f082c8`\n- `Linux 6.18`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}