CVE-2025-38471

HIGH

Linux Kernel 6.0.6-6.1 - Use-After-Free in TLS Socket Queue Handling

Title source: llm
STIX 2.1

Description

In the Linux kernel, the following vulnerability has been resolved: tls: always refresh the queue when reading sock After recent changes in net-next TCP compacts skbs much more aggressively. This unearthed a bug in TLS where we may try to operate on an old skb when checking if all skbs in the queue have matching decrypt state and geometry. BUG: KASAN: slab-use-after-free in tls_strp_check_rcv+0x898/0x9a0 [tls] (net/tls/tls_strp.c:436 net/tls/tls_strp.c:530 net/tls/tls_strp.c:544) Read of size 4 at addr ffff888013085750 by task tls/13529 CPU: 2 UID: 0 PID: 13529 Comm: tls Not tainted 6.16.0-rc5-virtme Call Trace: kasan_report+0xca/0x100 tls_strp_check_rcv+0x898/0x9a0 [tls] tls_rx_rec_wait+0x2c9/0x8d0 [tls] tls_sw_recvmsg+0x40f/0x1aa0 [tls] inet_recvmsg+0x1c3/0x1f0 Always reload the queue, fast path is to have the record in the queue when we wake, anyway (IOW the path going down "if !strp->stm.full_len").

Scores

CVSS v3 7.8
EPSS 0.0007
EPSS Percentile 21.6%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-416
Status published
Products (18)
debian/debian_linux 11.0
Linux/Linux < 6.1
Linux/Linux 0d87bbd39d7fd1135ab9eca672d760470f6508e8 - 1f3a429c21e0e43e8b8c55d30701e91411a4df02
Linux/Linux 0d87bbd39d7fd1135ab9eca672d760470f6508e8 - 4ab26bce3969f8fd925fe6f6f551e4d1a508c68b
Linux/Linux 0d87bbd39d7fd1135ab9eca672d760470f6508e8 - 730fed2ff5e259495712518e18d9f521f61972bb
Linux/Linux 0d87bbd39d7fd1135ab9eca672d760470f6508e8 - c76f6f437c46b2390888e0e1dc7aafafa9f4e0c6
Linux/Linux 0d87bbd39d7fd1135ab9eca672d760470f6508e8 - cdb767915fc9a15d88d19d52a1455f1dc3e5ddc8
Linux/Linux 2277d7cbdf47531b2c3cd01ba15255fa955aab35
Linux/Linux 6.0.6 - 6.1
Linux/Linux 6.1
... and 8 more
Published Jul 28, 2025
Tracked Since Feb 18, 2026