CVE-2025-38616

HIGH EPSS 7.6%
Published Aug 22, 202510mo ago · Modified Jun 17, 20261w ago
7.1 CVSS 3.1
High
Find Similar
Published Aug 22, 2025 10mo ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: tls: handle data disappearing from under the TLS ULP TLS expects that it owns the receive queue of the TCP socket. This cannot be guaranteed in case the reader of the TCP socket entered before the TLS ULP was installed, or uses some non-standard read API (eg. zerocopy ones). Replace the WARN_ON() and a buggy early exit (which leaves anchor pointing to a freed skb) with real error handling. Wipe the parsing state and tell the reader to retry. We already reload the anchor every time we (re)acquire the socket lock, so the only condition we need to avoid is an out of bounds read (not having enough bytes in the socket for previously parsed record len). If some data was read from under TLS but there's enough in the queue we'll reload and decrypt what is most likely not a valid TLS record. Leading to some undefined behavior from TLS perspective (corrupting a stream? missing an alert? missing an attack?) but no kernel crash should take place.

CVSS Details

Base Score
7.1
Exploitability
1.8
Impact
5.2
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
7.6% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-125 Out-of-bounds Read Memory Safety

Affected Products 5

VendorProductVersionRange
linuxlinux_kernel*≥6.0  –  <6.6.103
linuxlinux_kernel*≥6.7  –  <6.12.43
linuxlinux_kernel*≥6.13  –  <6.15.11
linuxlinux_kernel*≥6.16  –  <6.16.2
linuxlinux_kernel6.17any

References 5

  • git.kernel.org https://git.kernel.org/stable/c/2fb97ed9e2672b4f6e24ce206ac1a875ce4bcb38
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6db015fc4b5d5f63a64a193f65d98da3a7fc811d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/db3658a12d5ec4db7185ae7476151a50521b7207
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/eb0336f213fe88bbdb7d2b19c9c9ec19245a3155
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f1fe99919f629f980d0b8a7ff16950bffe06a859
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/2fb97ed9e2672b4f6e24ce206ac1a875ce4bcb38
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6db015fc4b5d5f63a64a193f65d98da3a7fc811d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/db3658a12d5ec4db7185ae7476151a50521b7207
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/eb0336f213fe88bbdb7d2b19c9c9ec19245a3155
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f1fe99919f629f980d0b8a7ff16950bffe06a859
    Patch