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.
Affected products
linux: linux kernel
References8
- git.kernel.org/stable/c/05363abc7625cf18c96e67f50673cd07f11da5e9 Patch
- git.kernel.org/stable/c/1da904e84de608907662ad8a51ba9c571d61e003 Patch
- git.kernel.org/stable/c/2c99326dc1c79b7ce3c8dd92929b5ce724ff70eb Patch
- git.kernel.org/stable/c/49918dd52615097529811d21ec6074dd02ebe77c Patch
- git.kernel.org/stable/c/88d5b28f63c7aac1271784e3b800ed405d1cde75 Patch
- git.kernel.org/stable/c/8baa234181f632cabacf73e4834a910859e9fcc9 Patch
- git.kernel.org/stable/c/8d849adfbc3e98417fb541620568db1a759ef441 Patch
- git.kernel.org/stable/c/d47234840aeb4182ed3ee795c578b1dfa9cbd25b Patch
Metrics
- CVSS 3.1
-
5.5
MEDIUM
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 2 · as of 13 November 2026
- CWE
- CWE-476
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