CVE-2026-31532

HIGH EPSS 2.5%
Published Apr 23, 20262mo ago · Modified Jun 17, 20262w ago
7.8 CVSS 3.1
High
Find Similar
Published Apr 23, 2026 2mo ago
Last Modified Jun 17, 2026 2w ago

Description

In the Linux kernel, the following vulnerability has been resolved: can: raw: fix ro->uniq use-after-free in raw_rcv() raw_release() unregisters raw CAN receive filters via can_rx_unregister(), but receiver deletion is deferred with call_rcu(). This leaves a window where raw_rcv() may still be running in an RCU read-side critical section after raw_release() frees ro->uniq, leading to a use-after-free of the percpu uniq storage. Move free_percpu(ro->uniq) out of raw_release() and into a raw-specific socket destructor. can_rx_unregister() takes an extra reference to the socket and only drops it from the RCU callback, so freeing uniq from sk_destruct ensures the percpu area is not released until the relevant callbacks have drained. [mkl: applied manually]

CVSS Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
2.5% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 5

VendorProductVersionRange
linuxlinux_kernel*≥4.1  –  ≤6.6.136
linuxlinux_kernel*≥6.7  –  <6.12.83
linuxlinux_kernel*≥6.18  –  <6.18.24
linuxlinux_kernel*≥6.19  –  <6.19.14
linuxlinux_kernel*≥7.0  –  <7.0.1

References 9

  • git.kernel.org https://git.kernel.org/stable/c/1a0f2de81f7fbdc538fc72d7d74609b79bc83cc0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/1de30576a6dfeaaa27ef91fa272e6b9240b6fbd3
  • git.kernel.org https://git.kernel.org/stable/c/34c1741254ff972e8375faf176678a248826fe3a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/3f43f12fde34737fba091b7e3ab391e14ddbb0be
  • git.kernel.org https://git.kernel.org/stable/c/572f0bf536ebc14f6e7da3d21a85cf076de8358e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5e9cfffad898bbeaafd0ea608a6d267362f050fc
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/64c8553decf5a5f2417bd54761ea0a832c56c4ca
  • git.kernel.org https://git.kernel.org/stable/c/7201a531b9a5ed892bfda5ded9194ef622de8ffa
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a535a9217ca3f2fccedaafb2fddb4c48f27d36dc
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/1a0f2de81f7fbdc538fc72d7d74609b79bc83cc0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/34c1741254ff972e8375faf176678a248826fe3a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/572f0bf536ebc14f6e7da3d21a85cf076de8358e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5e9cfffad898bbeaafd0ea608a6d267362f050fc
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7201a531b9a5ed892bfda5ded9194ef622de8ffa
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a535a9217ca3f2fccedaafb2fddb4c48f27d36dc
    Patch