CVE-2026-80627: Linux kernel · MIPS: mm: Fix out-of-bounds write in maar_res_walk()
Affects Linux kernelSource GCVE Database
Not known to be exploited · fixed in 5.15.0-1117.124~20.04.1 : update Linux kernel when convenient.
Data as of 26 Oct 2026, 17:16 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 12% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 5.15.0-1117.124~20.04.1, 5.15.0-1123.132~20.04.1, 5.15.0-1122.131~20.04.1 +40
Exploitation evidence
Disclosed: evidence found.
CVE published 28 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.04 LTSlinuxpkg:deb/ubuntu/linux?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSlinux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSlinux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSlinux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSlinux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSlinux-gkepkg:deb/ubuntu/linux-gke?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A patch is available and should be applied to affected linux-hwe-edge kernel versions. The vendor advisory confirms that this issue has been fixed. Users should update to the fixed kernel versions to remediate this vulnerability.
Description
A vulnerability in the Linux kernel's MIPS memory management subsystem was fixed to prevent an out-of-bounds write in the maar_res_walk() function. The issue occurs when more than 16 memory ranges are reported, causing an overflow write past the fixed-size array before a boundary check is performed. This flaw could lead to memory corruption. The vulnerability affects specific versions of the linux-hwe-edge kernel and has been patched.
References
- nvd.nist.gov/vuln/detail/CVE-2026-80627 (opens in a new tab)
- git.kernel.org/stable/c/038f068cced8e9c49e8c419f3112d909ad366a3a (opens in a new tab)
- git.kernel.org/stable/c/1b001b16bc88f3f7817e228acfd91ee01bdcfcce (opens in a new tab)
- git.kernel.org/stable/c/431812eb88c200bc3ec33b88782c8cc415842074 (opens in a new tab)
- git.kernel.org/stable/c/44c1d902cf0798b60762a7a98be992b9f5ded7dd (opens in a new tab)
- git.kernel.org/stable/c/8b3e0c1c63015deaf084286899f5b2d0526715de (opens in a new tab)
- git.kernel.org/stable/c/92f38fe85198ace9b211bc7712b7951acfb94560 (opens in a new tab)
- git.kernel.org/stable/c/a594100e147a6a67eb29189170f1df3645cda12b (opens in a new tab)
- git.kernel.org/stable/c/ac7385af1dca86a5ea704c80ca4dc822083ff9e2 (opens in a new tab)
- ubuntu.com/security/CVE-2026-80627 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-80627 (opens in a new tab)
- git.kernel.org/linus/1b001b16bc88f3f7817e228acfd91ee01bdcfcce (opens in a new tab)
- ubuntu.com/security/notices/USN-8878-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8879-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8877-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8875-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8888-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8889-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8887-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8888-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8887-2 (opens in a new tab)