CVE-2026-80627 (GCVE-0-2026-80627)

Vulnerability from cvelistv5 – Published: 2026-08-28 06:48 – Updated: 2026-08-28 06:48
VLAI
Title
MIPS: mm: Fix out-of-bounds write in maar_res_walk()
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.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6666 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: a5718fe8f70f33b1b5b47a153057cfdd19684598 , < a594100e147a6a67eb29189170f1df3645cda12b (git)
Affected: a5718fe8f70f33b1b5b47a153057cfdd19684598 , < 8b3e0c1c63015deaf084286899f5b2d0526715de (git)
Affected: a5718fe8f70f33b1b5b47a153057cfdd19684598 , < 44c1d902cf0798b60762a7a98be992b9f5ded7dd (git)
Affected: a5718fe8f70f33b1b5b47a153057cfdd19684598 , < ac7385af1dca86a5ea704c80ca4dc822083ff9e2 (git)
Affected: a5718fe8f70f33b1b5b47a153057cfdd19684598 , < 431812eb88c200bc3ec33b88782c8cc415842074 (git)
Affected: a5718fe8f70f33b1b5b47a153057cfdd19684598 , < 92f38fe85198ace9b211bc7712b7951acfb94560 (git)
Affected: a5718fe8f70f33b1b5b47a153057cfdd19684598 , < 038f068cced8e9c49e8c419f3112d909ad366a3a (git)
Affected: a5718fe8f70f33b1b5b47a153057cfdd19684598 , < 1b001b16bc88f3f7817e228acfd91ee01bdcfcce (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.4
Unaffected: 0 , < 5.4 (semver)
Unaffected: 5.10.261 , ≤ 5.10.* (semver)
Unaffected: 5.15.212 , ≤ 5.15.* (semver)
Unaffected: 6.1.178 , ≤ 6.1.* (semver)
Unaffected: 6.6.145 , ≤ 6.6.* (semver)
Unaffected: 6.12.97 , ≤ 6.12.* (semver)
Unaffected: 6.18.40 , ≤ 6.18.* (semver)
Unaffected: 7.1.5 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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          "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-\u003enum_cfg as the index into the fixed-size\nwi-\u003ecfg 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."
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    "dateReserved": "2026-08-26T14:34:25.775Z",
    "dateUpdated": "2026-08-28T06:48:44.777Z",
    "state": "PUBLISHED"
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            "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-\u003enum_cfg as the index into the fixed-size\nwi-\u003ecfg 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."
          }
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      "current_release_date": "2026-08-31T16:11:39+00:00",
      "cve": "CVE-2026-80627",
      "id": "CVE-2026-80627",
      "initial_release_date": "2026-08-28T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: MIPS: mm: Fix out-of-bounds write in maar_res_walk()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80627.json",
      "version": "3"
    }
  }
}



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