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.
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Linux
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Linux Kernel
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Solution
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Workaround
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Fri, 28 Aug 2026 09:45:00 +0000
| Type | Values Removed | Values Added |
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| Weaknesses | CWE-125 |
Fri, 28 Aug 2026 07:30:00 +0000
| Type | Values Removed | Values Added |
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| 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. | |
| Title | MIPS: mm: Fix out-of-bounds write in maar_res_walk() | |
| First Time appeared |
Linux
Linux linux Kernel |
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| CPEs | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Linux
Linux linux Kernel |
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| References |
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MITRE
Status: PUBLISHED
Assigner: Linux
Published:
Updated: 2026-08-28T06:48:44.777Z
Reserved: 2026-08-26T14:34:25.775Z
Link: CVE-2026-80627
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-08-28T08:16:46.867
Modified: 2026-08-28T08:16:46.867
Link: CVE-2026-80627
Redhat
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OpenCVE Enrichment
Updated: 2026-08-28T10:30:17Z