MIPS: mm: Fix out-of-bounds write in maar_res_walk()
Key facts
- Attack vector
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- Privileges required
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- User interaction
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- Attack complexity
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- Impact type
- —
- Confidentiality · integrity · availability
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- Fix status
- Fixed
No CVSS vector from any source. Fix status from CNA.
Summary
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.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.97, 6.18.40, 7.1.5, 7.2
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
Not affected: 5 products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2026-80627
- 2026-10-03 Alias added: GHSA-52jh-gf9j-c2mq
References
Other 8
- 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
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Sources
- CVE-2026-80627 · CVE Program
- CVE-2026-80627 · NVD
- FIRST EPSS
- GHSA-52jh-gf9j-c2mq · GitHub Advisory Database · CC BY 4.0
- CVE-2026-80627 · Red Hat security data · CC BY 4.0
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