DEBIAN-CVE-2026-99116: Use After Free

Published Oct 28, 2026
·
Updated

In the Linux kernel, the following vulnerability has been resolved: net: psp: do not inherit the Rx association on clone sk->pspassoc sits past skdontcopyend, so sockcopy() copies it into every socket accepted from a listener without taking a reference, while inetsockdestruct() puts for every inet socket. psptwskinit() does refcountinc() for the timewait socket, so a child closing through TIMEWAIT cancels its own put and leaves the association with one reference and N timewait sockets holding the same pointer. Closing the listener frees it, and the timewait timers then put freed memory. Rejecting the association on a listening socket is not sufficient: a socket can acquire one while established and then be turned back into a listener, because tcpdisconnect() leaves sk->pspassoc in place. BUG: KASAN: slab-use-after-free in psptwskassocfree+0x6f/0xf0 Write of size 4 at addr ffff888110f9255c by task swapper/7/0 psptwskassocfree+0x6f/0xf0 inettwskput+0xda/0x1b0 calltimerfn+0x53/0x2e0 runtimers+0x764/0xa80 Freed by task 99: kfree+0x1a7/0x500 processonework+0x7ec/0x1100 An association carries a per-connection SPI and key, so a child must not inherit the parent's. Clear it on clone.

Affected Software

1 affected component
debian/linux*

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Compensating control

    In the Linux kernel net:psp socket-clone path, clear sk->psp_assoc when cloning a socket so the child does not inherit the parent’s Rx association.

Event History

Oct 28, 2026
CVE Published
via OSV·11:17 AM
Data Sourced
via OSV·11:17 AM
DescriptionAffected Software

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