High severity · published Jul 28, 2025
CVE-2025-38471
tls: always refresh the queue when reading sock
7.8
CVSS
0.4%
EPSS
No
On KEV
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").
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 38% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
6.0.6 before 6.1; 6.1.1 before 6.1.147; 6.2 before 6.6.100; 6.7 before 6.12.40; 6.13 before 6.15.8; 6.1; +13 more · source: NVD
LI
Linux · Linux
0d87bbd39d7fd1135ab9eca672d760470f6508e8 before 730fed2ff5e259495712518e18d9f521f61972bb; 0d87bbd39d7fd1135ab9eca672d760470f6508e8 before 1f3a429c21e0e43e8b8c55d30701e91411a4df02; 0d87bbd39d7fd1135ab9eca672d760470f6508e8 before cdb767915fc9a15d88d19d52a1455f1dc3e5ddc8; 0d87bbd39d7fd1135ab9eca672d760470f6508e8 before c76f6f437c46b2390888e0e1dc7aafafa9f4e0c6; 0d87bbd39d7fd1135ab9eca672d760470f6508e8 before 4ab26bce3969f8fd925fe6f6f551e4d1a508c68b; 2277d7cbdf47531b2c3cd01ba15255fa955aab35; +2 more · source: vendor
DL
Debian Linux · Debian
11.0 · source: NVD
SS
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP · Siemens
V3.1.5; V3.1.5 · source: CISA
SS
SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP · Siemens
V3.1.5; V3.1.5 · source: CISA
SS
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP · Siemens
V3.1.5 · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-38471
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-38471
Patch
https://git.kernel.org/stable/c/1f3a429c21e0e43e8b8c55d30701e91411a4df02
Patch
https://git.kernel.org/stable/c/4ab26bce3969f8fd925fe6f6f551e4d1a508c68b
Patch
https://git.kernel.org/stable/c/730fed2ff5e259495712518e18d9f521f61972bb
Patch
https://git.kernel.org/stable/c/c76f6f437c46b2390888e0e1dc7aafafa9f4e0c6
Patch
https://git.kernel.org/stable/c/cdb767915fc9a15d88d19d52a1455f1dc3e5ddc8
Third Party Advisory
https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
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