CVE-2026-99116

Status: UPDATED  |  Advisory ID: CVE-2026-99116

Key Details

Affected Products, Subsystems & Sectors

What to Know

In the Linux kernel, the following vulnerability has been resolved:

net: psp: do not inherit the Rx association on clone

sk->psp_assoc sits past sk_dontcopy_end, so sock_copy() copies it into

every socket accepted from a listener without taking a reference, while

inet_sock_destruct() puts for every inet socket. psp_twsk_init() does

refcount_inc() for the timewait socket, so a child closing through

TIME_WAIT 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 tcp_disconnect() leaves sk->psp_assoc in place.

BUG: KASAN: slab-use-after-free in psp_twsk_assoc_free+0x6f/0xf0

Write of size 4 at addr ffff888110f9255c by task swapper/7/0

psp_twsk_assoc_free+0x6f/0xf0

inet_twsk_put+0xda/0x1b0

call_timer_fn+0x53/0x2e0

__run_timers+0x764/0xa80

Freed by task 99:

kfree+0x1a7/0x500

process_one_work+0x7ec/0x1100

An association carries a per-connection SPI and key, so a child must not

inherit the parent's. Clear it on clone. (NVD)

What to Do

Monitor Linux's web page for any future patch releases.

References