CVE-2025-38471

tls: always refresh the queue when reading sock

HIGH

7.8

CVSS Score

Published: July 28, 2025 at 11:21 AM UTC

Updated: October 15, 2026 at 01:07 AM UTC

5 products affected across 3 vendorsLinux KernelDebian LinuxSIMATIC S7-1500 CPU 1518-4 Pn /dp MFP Firmware

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Severity

HIGH7.8

Exploit prediction

EPSS 0.5%

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").

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Debian Linux · Debiandrupal

95%

11.0

Linux Kernel · Linux

95%

v ≥ 6.0.66.0.6 ≤ v < 6.16.1 ≤ v < 6.1.1476.1 ≤ v < 6.12.406.1 ≤ v < 6.15.86.1 ≤ v < 6.166.1 ≤ v < 6.6.1006.1.1 ≤ v < 6.1.1476.13 ≤ v < 6.15.86.2 ≤ v < 6.6.1006.7 ≤ v < 6.12.400d87bbd39d7fd1135ab9eca672d760470f6508e82277d7cbdf47531b2c3cd01ba15255fa955aab356.0.6 6.1 6.1 rc2 6.1 rc3 6.1 rc4 6.1 rc5 6.1 rc6 6.1 rc7 6.1 rc8 6.16 rc1 6.16 rc2 6.16 rc3 6.16 rc4 6.16 rc5 6.16 rc6

Vendor states this is fixed in 1f3a429c21e0e43e8b8c55d30701e91411a4df02 (fixed)

Vendor states this is fixed in 4ab26bce3969f8fd925fe6f6f551e4d1a508c68b (fixed)

Vendor states this is fixed in 730fed2ff5e259495712518e18d9f521f61972bb (fixed)

Vendor states this is fixed in c76f6f437c46b2390888e0e1dc7aafafa9f4e0c6 (fixed)

Vendor states this is fixed in cdb767915fc9a15d88d19d52a1455f1dc3e5ddc8 (fixed)

Vendor states this is fixed in 6.1 (unaffected)

Vendor states this is fixed in 6.1.147 (unaffected)

Vendor states this is fixed in 6.12.40 (unaffected)

Vendor states this is fixed in 6.15.8 (unaffected)

Vendor states this is fixed in 6.16 (unaffected)

Vendor states this is fixed in 6.6.100 (unaffected)

SIMATIC S7-1500 CPU 1518-4 Pn /dp MFP Firmware · Siemens