CVE-2026-43089

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-43089
In the Linux kernel, the following vulnerability has been resolved: xfrm_user: fix info leak in build_mapping() struct xfrm_usersa_id has a one-byte padding hole after the proto field, which ends up never getting set to zero before copying out to userspace. Fix that up by zeroing out the whole structure before setting individual variables.

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/1beb76b2053b68c491b78370794b8ff63c8f8c02 Patch
https://git.kernel.org/stable/c/521385cbd50ca9474396d88462fcdfa6489685d9
https://git.kernel.org/stable/c/5a1a4b049ddde41466ccac0daeec326254b133f2 Patch
https://git.kernel.org/stable/c/700c9622b23c33b5933e6dcea816492c064e4e10 Patch
https://git.kernel.org/stable/c/72a8de41c3eb4dcf22bf3b674ea38fb2f75d6f32
https://git.kernel.org/stable/c/c2779ae9a3e5a044e5ccd564681511bbbcc5fc0f
https://git.kernel.org/stable/c/d3125c541a96fb3c0fc7210112684baf22b6c24d Patch
https://git.kernel.org/stable/c/f779a6b6cdb6e12baa0663063ac59ab2a8f20c0c Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*
History

01 Jun 2026, 17:17

Type Values Removed Values Added
References
  • () https://git.kernel.org/stable/c/521385cbd50ca9474396d88462fcdfa6489685d9 -
  • () https://git.kernel.org/stable/c/72a8de41c3eb4dcf22bf3b674ea38fb2f75d6f32 -
  • () https://git.kernel.org/stable/c/c2779ae9a3e5a044e5ccd564681511bbbcc5fc0f -

22 May 2026, 19:47

Type Values Removed Values Added
CWE CWE-401
First Time Linux
Linux linux Kernel
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
CPE cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*
References () https://git.kernel.org/stable/c/1beb76b2053b68c491b78370794b8ff63c8f8c02 - () https://git.kernel.org/stable/c/1beb76b2053b68c491b78370794b8ff63c8f8c02 - Patch
References () https://git.kernel.org/stable/c/5a1a4b049ddde41466ccac0daeec326254b133f2 - () https://git.kernel.org/stable/c/5a1a4b049ddde41466ccac0daeec326254b133f2 - Patch
References () https://git.kernel.org/stable/c/700c9622b23c33b5933e6dcea816492c064e4e10 - () https://git.kernel.org/stable/c/700c9622b23c33b5933e6dcea816492c064e4e10 - Patch
References () https://git.kernel.org/stable/c/d3125c541a96fb3c0fc7210112684baf22b6c24d - () https://git.kernel.org/stable/c/d3125c541a96fb3c0fc7210112684baf22b6c24d - Patch
References () https://git.kernel.org/stable/c/f779a6b6cdb6e12baa0663063ac59ab2a8f20c0c - () https://git.kernel.org/stable/c/f779a6b6cdb6e12baa0663063ac59ab2a8f20c0c - Patch

06 May 2026, 10:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-05-06 10:16

Updated : 2026-06-01 17:17

NVD link : CVE-2026-43089

Mitre link : CVE-2026-43089

CVE.ORG link : CVE-2026-43089

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-401

Missing Release of Memory after Effective Lifetime