CVE-2026-80627
MIPS: mm: Fix out-of-bounds write in maar_res_walk()
Description
In the Linux kernel, the following vulnerability has been resolved: MIPS: mm: Fix out-of-bounds write in maar_res_walk() maar_res_walk() uses wi->num_cfg as the index into the fixed-size wi->cfg array, but checks whether the array is full only after it has filled the selected entry. If walk_system_ram_range() reports more than 16 memory ranges, the overflow call writes one struct maar_config past the end of the array before WARN_ON() prevents num_cfg from advancing. Move the full-array check before taking the array slot and return non-zero when the scratch array is full, so walk_system_ram_range() terminates the walk instead of invoking the callback for further ranges.
INFO
Published Date :
Aug. 28, 2026, 8:16 a.m.
Last Modified :
Aug. 28, 2026, 8:16 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Move the full-array check before accessing the array.
- Return non-zero when the array is full.
- Terminate the walk instead of invoking the callback.
- Update the Linux kernel.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-80627.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-80627 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-2026-80627
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).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-80627 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-80627 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.
-
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 28, 2026
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: MIPS: mm: Fix out-of-bounds write in maar_res_walk() maar_res_walk() uses wi->num_cfg as the index into the fixed-size wi->cfg array, but checks whether the array is full only after it has filled the selected entry. If walk_system_ram_range() reports more than 16 memory ranges, the overflow call writes one struct maar_config past the end of the array before WARN_ON() prevents num_cfg from advancing. Move the full-array check before taking the array slot and return non-zero when the scratch array is full, so walk_system_ram_range() terminates the walk instead of invoking the callback for further ranges. Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/80xxx/CVE-2026-80627.json">CVE-2026-80627</a> Added Reference https://git.kernel.org/stable/c/038f068cced8e9c49e8c419f3112d909ad366a3a Added Reference https://git.kernel.org/stable/c/1b001b16bc88f3f7817e228acfd91ee01bdcfcce Added Reference https://git.kernel.org/stable/c/431812eb88c200bc3ec33b88782c8cc415842074 Added Reference https://git.kernel.org/stable/c/44c1d902cf0798b60762a7a98be992b9f5ded7dd Added Reference https://git.kernel.org/stable/c/8b3e0c1c63015deaf084286899f5b2d0526715de Added Reference https://git.kernel.org/stable/c/92f38fe85198ace9b211bc7712b7951acfb94560 Added Reference https://git.kernel.org/stable/c/a594100e147a6a67eb29189170f1df3645cda12b Added Reference https://git.kernel.org/stable/c/ac7385af1dca86a5ea704c80ca4dc822083ff9e2