7.8 High

In the Linux kernel, the following vulnerability has been resolved: net: psp: do not inherit the Rx association on clone sk->pspassoc sits…

CVE-2026-99116

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.

Assessment

CVSS: 7.8 (v3.1)
Severity: High
EPSS: 0.17% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 28 October 2026
Last updated: 31 October 2026
Affected: Linux
Assigner: Linux

CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

At the source

EUVD (ENISA)

References

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