CVE-2026-31671

MEDIUM EPSS 1.8%
Published Apr 24, 20262mo ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Apr 24, 2026 2mo ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: xfrm_user: fix info leak in build_report() struct xfrm_user_report is a __u8 proto field followed by a struct xfrm_selector which means there is three "empty" bytes of padding, but the padding is never zeroed before copying to userspace. Fix that up by zeroing the structure before setting individual member variables.

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
1.8% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-401

Affected Products 15

VendorProductVersionRange
linuxlinux_kernel*≥2.6.19.1  –  <5.10.253
linuxlinux_kernel*≥5.11  –  <5.15.203
linuxlinux_kernel*≥5.16  –  <6.1.169
linuxlinux_kernel*≥6.2  –  <6.6.135
linuxlinux_kernel*≥6.7  –  <6.12.82
linuxlinux_kernel*≥6.13  –  <6.18.23
linuxlinux_kernel*≥6.19  –  <6.19.13
linuxlinux_kernel2.6.19any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any

References 8

  • git.kernel.org https://git.kernel.org/stable/c/0616314b3b34f24cbb91da8c6bd8bcdc4c8592f9
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/0a30dceb0e1f0c480d2482e6d7cebf8aebb6eb72
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6c55714c931051cd7f4839c19ce0867179fd22fe
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/716c546e88cfe49d841658240e10cb57bc50a2cc
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d10119968d0e1f2b669604baf2a8b5fdb72fa6b4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d27c02eec529f78055a46a5c9e6c62684382b2d8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e0c8542c3d097ed4205ded51868195d5d6ddac62
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ff5ee507302303b15859753c3e0d67d38fd12c88
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/0616314b3b34f24cbb91da8c6bd8bcdc4c8592f9
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/0a30dceb0e1f0c480d2482e6d7cebf8aebb6eb72
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6c55714c931051cd7f4839c19ce0867179fd22fe
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/716c546e88cfe49d841658240e10cb57bc50a2cc
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d10119968d0e1f2b669604baf2a8b5fdb72fa6b4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d27c02eec529f78055a46a5c9e6c62684382b2d8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e0c8542c3d097ed4205ded51868195d5d6ddac62
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ff5ee507302303b15859753c3e0d67d38fd12c88
    Patch