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CVE-2026-80627

Unknown

Last modified

CVE-2026-80627 is a vulnerability of currently unknown severity. 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..

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.

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= a5718fe8f70f33b1b5b47a153057cfdd19684598, < a594100e147a6a67eb29189170f1df3645cda12b; >= a5718fe8f70f33b1b5b47a153057cfdd19684598, < 8b3e0c1c63015deaf084286899f5b2d0526715de; >= a5718fe8f70f33b1b5b47a153057cfdd19684598, < 44c1d902cf0798b60762a7a98be992b9f5ded7dd; >= a5718fe8f70f33b1b5b47a153057cfdd19684598, < ac7385af1dca86a5ea704c80ca4dc822083ff9e2; >= a5718fe8f70f33b1b5b47a153057cfdd19684598, < 431812eb88c200bc3ec33b88782c8cc415842074; >= a5718fe8f70f33b1b5b47a153057cfdd19684598, < 92f38fe85198ace9b211bc7712b7951acfb94560; >= a5718fe8f70f33b1b5b47a153057cfdd19684598, < 038f068cced8e9c49e8c419f3112d909ad366a3a; >= a5718fe8f70f33b1b5b47a153057cfdd19684598, < 1b001b16bc88f3f7817e228acfd91ee01bdcfcce
LinuxLinux5.4

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-80627?
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.
How severe is CVE-2026-80627?
Severity scoring for CVE-2026-80627 is pending analysis.
How do I fix CVE-2026-80627?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST