CVE-2026-43089
Medium
Description
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.
SeverityMedium
CVSS5.5
Exploit probability—
Product
Linux Kernel
PublishedMay 6, 2026
First seenMay 6, 2026
Weakness typeCWE-401CWE-401
How to fix
Update
- linux linux_kernel6.6.136, 6.12.83, 6.18.24, 6.19.14 or later
Patches
- git.kernel.org/stable/c/1beb76b2053b68c491b78370794b8ff63c8f8c02
- git.kernel.org/stable/c/5a1a4b049ddde41466ccac0daeec326254b133f2
- git.kernel.org/stable/c/700c9622b23c33b5933e6dcea816492c064e4e10
- git.kernel.org/stable/c/d3125c541a96fb3c0fc7210112684baf22b6c24d
- git.kernel.org/stable/c/f779a6b6cdb6e12baa0663063ac59ab2a8f20c0c
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 2.6.29.1 ≤ v < 6.6.136, 6.7 ≤ v < 6.12.83, 6.13 ≤ v < 6.18.24, 6.19 ≤ v < 6.19.14, 7.0 | 6.6.136, 6.12.83, 6.18.24, 6.19.14 |
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