CVE-2026-43124
Medium
Description
In the Linux kernel, the following vulnerability has been resolved: pstore: ram_core: fix incorrect success return when vmap() fails In persistent_ram_vmap(), vmap() may return NULL on failure. If offset is non-zero, adding offset_in_page(start) causes the function to return a non-NULL pointer even though the mapping failed. persistent_ram_buffer_map() therefore incorrectly returns success. Subsequent access to prz->buffer may dereference an invalid address and cause crashes. Add proper NULL checking for vmap() failures.
SeverityMedium
CVSS5.5
Exploit probability—
Product
Linux Kernel
PublishedMay 6, 2026
First seenMay 6, 2026
Weakness typeCWE-476NULL pointer dereference
How to fix
Update
- linux linux_kernel5.10.252, 5.15.202, 6.1.165, 6.6.128, 6.12.75, 6.18.16, 6.19.6 or later
Patches
- git.kernel.org/stable/c/05363abc7625cf18c96e67f50673cd07f11da5e9
- git.kernel.org/stable/c/1da904e84de608907662ad8a51ba9c571d61e003
- git.kernel.org/stable/c/2c99326dc1c79b7ce3c8dd92929b5ce724ff70eb
- git.kernel.org/stable/c/49918dd52615097529811d21ec6074dd02ebe77c
- git.kernel.org/stable/c/88d5b28f63c7aac1271784e3b800ed405d1cde75
- git.kernel.org/stable/c/8baa234181f632cabacf73e4834a910859e9fcc9
- git.kernel.org/stable/c/8d849adfbc3e98417fb541620568db1a759ef441
- git.kernel.org/stable/c/d47234840aeb4182ed3ee795c578b1dfa9cbd25b
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 3.16.62 ≤ v < 5.10.252, 5.11 ≤ v < 5.15.202, 5.16 ≤ v < 6.1.165, 6.2 ≤ v < 6.6.128, 6.7 ≤ v < 6.12.75, 6.13 ≤ v < 6.18.16, 6.19 ≤ v < 6.19.6 | 5.10.252, 5.15.202, 6.1.165, 6.6.128, 6.12.75, 6.18.16, 6.19.6 |
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