CVE-2026-43124
pstore: ram_core: fix incorrect success return when vmap() fails
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.
INFO
Published Date :
May 6, 2026, 12:16 p.m.
Last Modified :
May 6, 2026, 1:07 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Apply the patch to the Linux kernel.
- Ensure proper NULL checking for vmap() failures.
- Test the fix to prevent buffer access issues.
References to Advisories, Solutions, and Tools
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CVE-2026-43124.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-43124 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-43124
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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The following table lists the changes that have been made to the
CVE-2026-43124 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 06, 2026
Action Type Old Value New Value Added 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. Added Reference https://git.kernel.org/stable/c/05363abc7625cf18c96e67f50673cd07f11da5e9 Added Reference https://git.kernel.org/stable/c/1da904e84de608907662ad8a51ba9c571d61e003 Added Reference https://git.kernel.org/stable/c/2c99326dc1c79b7ce3c8dd92929b5ce724ff70eb Added Reference https://git.kernel.org/stable/c/49918dd52615097529811d21ec6074dd02ebe77c Added Reference https://git.kernel.org/stable/c/88d5b28f63c7aac1271784e3b800ed405d1cde75 Added Reference https://git.kernel.org/stable/c/8baa234181f632cabacf73e4834a910859e9fcc9 Added Reference https://git.kernel.org/stable/c/8d849adfbc3e98417fb541620568db1a759ef441 Added Reference https://git.kernel.org/stable/c/d47234840aeb4182ed3ee795c578b1dfa9cbd25b