CVE-2025-37756

MEDIUM EPSS 16.4%
Published May 1, 20251y ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published May 1, 2025 1y ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: net: tls: explicitly disallow disconnect syzbot discovered that it can disconnect a TLS socket and then run into all sort of unexpected corner cases. I have a vague recollection of Eric pointing this out to us a long time ago. Supporting disconnect is really hard, for one thing if offload is enabled we'd need to wait for all packets to be _acked_. Disconnect is not commonly used, disallow it. The immediate problem syzbot run into is the warning in the strp, but that's just the easiest bug to trigger: WARNING: CPU: 0 PID: 5834 at net/tls/tls_strp.c:486 tls_strp_msg_load+0x72e/0xa80 net/tls/tls_strp.c:486 RIP: 0010:tls_strp_msg_load+0x72e/0xa80 net/tls/tls_strp.c:486 Call Trace: <TASK> tls_rx_rec_wait+0x280/0xa60 net/tls/tls_sw.c:1363 tls_sw_recvmsg+0x85c/0x1c30 net/tls/tls_sw.c:2043 inet6_recvmsg+0x2c9/0x730 net/ipv6/af_inet6.c:678 sock_recvmsg_nosec net/socket.c:1023 [inline] sock_recvmsg+0x109/0x280 net/socket.c:1045 __sys_recvfrom+0x202/0x380 net/socket.c:2237

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
16.4% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 9

VendorProductVersionRange
linuxlinux_kernel*≥4.13  –  <5.10.237
linuxlinux_kernel*≥5.11  –  <5.15.181
linuxlinux_kernel*≥5.16  –  <6.1.135
linuxlinux_kernel*≥6.2  –  <6.6.88
linuxlinux_kernel*≥6.7  –  <6.12.24
linuxlinux_kernel*≥6.13  –  <6.13.12
linuxlinux_kernel*≥6.14  –  <6.14.3
linuxlinux_kernel6.15any
debiandebian_linux11.0any

References 11

  • openwall.com http://www.openwall.com/lists/oss-security/2026/05/07/1
  • git.kernel.org https://git.kernel.org/stable/c/2bcad8fefcecdd5f005d8c550b25d703c063c34a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5071a1e606b30c0c11278d3c6620cd6a24724cf6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7bdcf5bc35ae59fc4a0fa23276e84b4d1534a3cf
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8513411ec321942bd3cfed53d5bb700665c67d86
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9fcbca0f801580cbb583e9cb274e2c7fbe766ca6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ac91c6125468be720eafde9c973994cb45b61d44
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c665bef891e8972e1d3ce5bbc0d42a373346a2c3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f3ce4d3f874ab7919edca364c147ac735f9f1d04
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
    Mailing List
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
    Mailing List

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/2bcad8fefcecdd5f005d8c550b25d703c063c34a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5071a1e606b30c0c11278d3c6620cd6a24724cf6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7bdcf5bc35ae59fc4a0fa23276e84b4d1534a3cf
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8513411ec321942bd3cfed53d5bb700665c67d86
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9fcbca0f801580cbb583e9cb274e2c7fbe766ca6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ac91c6125468be720eafde9c973994cb45b61d44
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c665bef891e8972e1d3ce5bbc0d42a373346a2c3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f3ce4d3f874ab7919edca364c147ac735f9f1d04
    Patch