CVE-2026-80880: Linux kernel · IB/mlx5: Properly support implicit ODP rereg_mr
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in ee914ef54a7e707453ecb43eb30fb0a5c6dd0d69 : update Linux kernel when convenient.
Data as of 6 Nov 2026, 17:34 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
Thin evidence
One scorer or none- CISA SSVC
- Exploitation
- No evidence of active exploitation and no public proof of concept
- Automatable
- Attackers cannot reliably automate steps 1–4 of the kill chain
- Technical impact
- Limited control over the software or limited information exposure
CISA SSVC assessment, 2026-11-06.
- Patch
- Available – fixed in ee914ef54a7e707453ecb43eb30fb0a5c6dd0d69, ee7a8335069150c3f1893a697ab30bbeca00d796, eb7cb798e563b3f3b3baeb9cc6f7455764267e50 +4
Exploitation evidence
Disclosed: evidence found.
CVE published 4 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: 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 6 Nov 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in
|
AI-suggested
A fix is available and has been applied in the Linux kernel versions identified by the provided commit hashes. Users should update to a Linux kernel version that includes these fixes to remediate the vulnerability.
Description
A vulnerability in the Linux kernel's IB/mlx5 driver related to implicit On-Demand Paging (ODP) reregistration of memory regions (rereg_mr) has been fixed. The issue involved improper handling of child memory keys (mkeys) in implicit ODP configurations, which required rebuilding the entire parent mkey structure upon changes. Additionally, a race condition involving access to the memory region's protection domain (mr->pd) was addressed.
References
- git.kernel.org/stable/c/cbc9982c8573fb9e35040063aa78c8ebe768a1ff (opens in a new tab)
- git.kernel.org/stable/c/ee914ef54a7e707453ecb43eb30fb0a5c6dd0d69 (opens in a new tab)
- git.kernel.org/stable/c/94f7e50eb6b2ce7fbd9aeac1db22460d2013a3fb (opens in a new tab)
- git.kernel.org/stable/c/eb7cb798e563b3f3b3baeb9cc6f7455764267e50 (opens in a new tab)
- git.kernel.org/stable/c/d4f84bfa089fe71f775d25beb29303e844494c25 (opens in a new tab)
- git.kernel.org/stable/c/5d02b9a2efd11d28d2a8feac7769686b1b871d9c (opens in a new tab)
- git.kernel.org/stable/c/ee7a8335069150c3f1893a697ab30bbeca00d796 (opens in a new tab)