CVE-2025-21669

MEDIUM EPSS 10.6%
Published Jan 31, 20251y ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Jan 31, 2025 1y ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: vsock/virtio: discard packets if the transport changes If the socket has been de-assigned or assigned to another transport, we must discard any packets received because they are not expected and would cause issues when we access vsk->transport. A possible scenario is described by Hyunwoo Kim in the attached link, where after a first connect() interrupted by a signal, and a second connect() failed, we can find `vsk->transport` at NULL, leading to a NULL pointer dereference.

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
10.6% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 11

VendorProductVersionRange
linuxlinux_kernel*≥5.5  –  <5.15.177
linuxlinux_kernel*≥5.16  –  <6.1.127
linuxlinux_kernel*≥6.2  –  <6.6.74
linuxlinux_kernel*≥6.7  –  <6.12.11
linuxlinux_kernel6.13any
linuxlinux_kernel6.13any
linuxlinux_kernel6.13any
linuxlinux_kernel6.13any
linuxlinux_kernel6.13any
linuxlinux_kernel6.13any
linuxlinux_kernel6.13any

References 9

  • cert-portal.siemens.com https://cert-portal.siemens.com/productcert/html/ssa-265688.html
  • git.kernel.org https://git.kernel.org/stable/c/18a7fc371d1dbf8deff16c2dd9292bcc73f43040
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/2cb7c756f605ec02ffe562fb26828e4bcc5fdfc1
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6486915fa661584d70e8e7e4068c6c075c67dd6d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/677579b641af109613564460a4e3bdcb16850b61
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/88244163bc7e7b0ce9dd7bf4c8a563b41525c3ee
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d88b249e14bd0ee1e46bbe4f456e22e01b8c68de
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/18a7fc371d1dbf8deff16c2dd9292bcc73f43040
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/2cb7c756f605ec02ffe562fb26828e4bcc5fdfc1
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6486915fa661584d70e8e7e4068c6c075c67dd6d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/677579b641af109613564460a4e3bdcb16850b61
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/88244163bc7e7b0ce9dd7bf4c8a563b41525c3ee
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d88b249e14bd0ee1e46bbe4f456e22e01b8c68de
    Patch