{"id":"CVE-2026-80627","state":"PUBLISHED","title":"MIPS: mm: Fix out-of-bounds write in maar_res_walk()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nMIPS: mm: Fix out-of-bounds write in maar_res_walk()\n\nmaar_res_walk() uses wi->num_cfg as the index into the fixed-size\nwi->cfg array, but checks whether the array is full only after it has\nfilled the selected entry. If walk_system_ram_range() reports more than\n16 memory ranges, the overflow call writes one struct maar_config past\nthe end of the array before WARN_ON() prevents num_cfg from advancing.\n\nMove the full-array check before taking the array slot and return non-zero\nwhen the scratch array is full, so walk_system_ram_range() terminates the\nwalk instead of invoking the callback for further ranges.","publishedAt":"2026-08-28T06:48:44.777Z","updatedAt":"2026-08-28T06:48:44.777Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"a5718fe8f70f33b1b5b47a153057cfdd19684598","status":"affected","lessThan":"a594100e147a6a67eb29189170f1df3645cda12b","versionType":"git"},{"version":"a5718fe8f70f33b1b5b47a153057cfdd19684598","status":"affected","lessThan":"8b3e0c1c63015deaf084286899f5b2d0526715de","versionType":"git"},{"version":"a5718fe8f70f33b1b5b47a153057cfdd19684598","status":"affected","lessThan":"44c1d902cf0798b60762a7a98be992b9f5ded7dd","versionType":"git"},{"version":"a5718fe8f70f33b1b5b47a153057cfdd19684598","status":"affected","lessThan":"ac7385af1dca86a5ea704c80ca4dc822083ff9e2","versionType":"git"},{"version":"a5718fe8f70f33b1b5b47a153057cfdd19684598","status":"affected","lessThan":"431812eb88c200bc3ec33b88782c8cc415842074","versionType":"git"},{"version":"a5718fe8f70f33b1b5b47a153057cfdd19684598","status":"affected","lessThan":"92f38fe85198ace9b211bc7712b7951acfb94560","versionType":"git"},{"version":"a5718fe8f70f33b1b5b47a153057cfdd19684598","status":"affected","lessThan":"038f068cced8e9c49e8c419f3112d909ad366a3a","versionType":"git"},{"version":"a5718fe8f70f33b1b5b47a153057cfdd19684598","status":"affected","lessThan":"1b001b16bc88f3f7817e228acfd91ee01bdcfcce","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/mips/mm/init.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.4","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.4","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.97","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/mips/mm/init.c"]}],"references":["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"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:07.220Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/80xxx/CVE-2026-80627.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-80627","state":"PUBLISHED","datePublished":"2026-08-28T06:48:44.777Z","dateUpdated":"2026-08-28T06:48:44.777Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-26T14:34:25.775Z"},"containers":{"cna":{"title":"MIPS: mm: Fix out-of-bounds write in maar_res_walk()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nMIPS: mm: Fix out-of-bounds write in maar_res_walk()\n\nmaar_res_walk() uses wi->num_cfg as the index into the fixed-size\nwi->cfg array, but checks whether the array is full only after it has\nfilled the selected entry. If walk_system_ram_range() reports more than\n16 memory ranges, the overflow call writes one struct maar_config past\nthe end of the array before WARN_ON() prevents num_cfg from advancing.\n\nMove the full-array check before taking the array slot and return non-zero\nwhen the scratch array is full, so walk_system_ram_range() terminates the\nwalk instead of invoking the callback for further ranges."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"a5718fe8f70f33b1b5b47a153057cfdd19684598","status":"affected","lessThan":"a594100e147a6a67eb29189170f1df3645cda12b","versionType":"git"},{"version":"a5718fe8f70f33b1b5b47a153057cfdd19684598","status":"affected","lessThan":"8b3e0c1c63015deaf084286899f5b2d0526715de","versionType":"git"},{"version":"a5718fe8f70f33b1b5b47a153057cfdd19684598","status":"affected","lessThan":"44c1d902cf0798b60762a7a98be992b9f5ded7dd","versionType":"git"},{"version":"a5718fe8f70f33b1b5b47a153057cfdd19684598","status":"affected","lessThan":"ac7385af1dca86a5ea704c80ca4dc822083ff9e2","versionType":"git"},{"version":"a5718fe8f70f33b1b5b47a153057cfdd19684598","status":"affected","lessThan":"431812eb88c200bc3ec33b88782c8cc415842074","versionType":"git"},{"version":"a5718fe8f70f33b1b5b47a153057cfdd19684598","status":"affected","lessThan":"92f38fe85198ace9b211bc7712b7951acfb94560","versionType":"git"},{"version":"a5718fe8f70f33b1b5b47a153057cfdd19684598","status":"affected","lessThan":"038f068cced8e9c49e8c419f3112d909ad366a3a","versionType":"git"},{"version":"a5718fe8f70f33b1b5b47a153057cfdd19684598","status":"affected","lessThan":"1b001b16bc88f3f7817e228acfd91ee01bdcfcce","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/mips/mm/init.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.4","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.4","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.97","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/mips/mm/init.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/a594100e147a6a67eb29189170f1df3645cda12b"},{"url":"https://git.kernel.org/stable/c/8b3e0c1c63015deaf084286899f5b2d0526715de"},{"url":"https://git.kernel.org/stable/c/44c1d902cf0798b60762a7a98be992b9f5ded7dd"},{"url":"https://git.kernel.org/stable/c/ac7385af1dca86a5ea704c80ca4dc822083ff9e2"},{"url":"https://git.kernel.org/stable/c/431812eb88c200bc3ec33b88782c8cc415842074"},{"url":"https://git.kernel.org/stable/c/92f38fe85198ace9b211bc7712b7951acfb94560"},{"url":"https://git.kernel.org/stable/c/038f068cced8e9c49e8c419f3112d909ad366a3a"},{"url":"https://git.kernel.org/stable/c/1b001b16bc88f3f7817e228acfd91ee01bdcfcce"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-28T06:48:44.777Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"5.10.261"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"5.15.212"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"6.1.178"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"6.6.145"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"6.12.97"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"6.18.40"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"7.1.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}