CVE-2026-80627
N/AIn 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.
No known exploitation, public exploit, or elevated probability at this time. Track for changes.
Exploitation likelihood
0.2%chance of exploitation in 30 days · 7th percentile
Impact if exploited
—CVSS · not scored
- No impact metrics
Proof of concept & exploit code
- github-search Search GitHub for public PoC repos
Test against your own equipment
curl -s https://vulnpedia.com/cve/CVE-2026-80627/poc.jsonMachine-readable PoC index for this CVE (for automation).Listed for defensive triage, patch verification, and authorized testing on systems you own. Machine-readable: /cve/CVE-2026-80627/poc.json
References
Technical & other
- https://git.kernel.org/stable/c/a594100e147a6a67eb29189170f1df3645cda12b
- https://git.kernel.org/stable/c/8b3e0c1c63015deaf084286899f5b2d0526715de
- https://git.kernel.org/stable/c/44c1d902cf0798b60762a7a98be992b9f5ded7dd
- https://git.kernel.org/stable/c/ac7385af1dca86a5ea704c80ca4dc822083ff9e2
- https://git.kernel.org/stable/c/431812eb88c200bc3ec33b88782c8cc415842074
- https://git.kernel.org/stable/c/92f38fe85198ace9b211bc7712b7951acfb94560
- https://git.kernel.org/stable/c/038f068cced8e9c49e8c419f3112d909ad366a3a
- https://git.kernel.org/stable/c/1b001b16bc88f3f7817e228acfd91ee01bdcfcce