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CVE-2026-80880· NVD / CVE Program· CNA Linux

IB/mlx5: Properly support implicit ODP rereg_mr

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.16% (FIRST EPSS).
  • Fixed version: Linux Linux 5d02b9a2efd11d28d2a8feac7769686b1b871d9c, 94f7e50eb6b2ce7fbd9aeac1db22460d2013a3fb, cbc9982c8573fb9e35040063aa78c8ebe768a1ff.

Low priority for now. Upgrade to Linux Linux 5d02b9a2efd11d28d2a8feac7769686b1b871d9c, 94f7e50eb6b2ce7fbd9aeac1db22460d2013a3fb, cbc9982c8573fb9e35040063aa78c8ebe768a1ff or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: IB/mlx5: Properly support implicit ODP rereg_mr Due to all the child mkeys in the implicit ODP configuration we cannot change anything in place for the parent mkey. Instead the whole thing needs to be rebuilt if any change is requested. If the user does not specify a translation then force the implicit values which will then fall through the logic into mlx5_ib_reg_user_mr() to allocate a completely new MR. Since implicit children were also touching the mr->pd, this removes another case where the access was racy.

—No exploit Fix available
Published
Sep 4, 2026
Updated
Sep 4, 2026
EPSS
0.1% · 4th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

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  • A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 5.11affected
    • ef3642c4f54d3493c92c71faf46139b2473bc532 and later · before cbc9982c8573fb9e35040063aa78c8ebe768a1ffaffected · git
    • ef3642c4f54d3493c92c71faf46139b2473bc532 and later · before ee914ef54a7e707453ecb43eb30fb0a5c6dd0d69affected · git
    • ef3642c4f54d3493c92c71faf46139b2473bc532 and later · before 94f7e50eb6b2ce7fbd9aeac1db22460d2013a3fbaffected · git
    • ef3642c4f54d3493c92c71faf46139b2473bc532 and later · before eb7cb798e563b3f3b3baeb9cc6f7455764267e50affected · git
    • ef3642c4f54d3493c92c71faf46139b2473bc532 and later · before d4f84bfa089fe71f775d25beb29303e844494c25affected · git
    • ef3642c4f54d3493c92c71faf46139b2473bc532 and later · before 5d02b9a2efd11d28d2a8feac7769686b1b871d9caffected · git
    • ef3642c4f54d3493c92c71faf46139b2473bc532 and later · before ee7a8335069150c3f1893a697ab30bbeca00d796affected · git
    • before 5.11not affected · semver
    • 5.15.212 and later · up to and including 5.15.*not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.180-16.1.180-1
Debian:13linuxbefore 6.12.100-16.12.100-1
Debian:14linuxbefore 7.1.5-17.1.5-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-80878Sep 4, 2026 · afs: Fix leak of ungot volume
    0Monitor
  • ← EarlierCVE-2026-80879Sep 4, 2026 · ocfs2: fix circular locking dependency in ocfs2_dio_end_io_write
    0Monitor
  • Later →CVE-2026-80881Sep 4, 2026 · ocfs2: fix buffer head management in ocfs2_read_blocks()
    0Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux5d02b9a2efd11d28d2a8feac7769686b1b871d9cVendor (CNA)
Linux Linux94f7e50eb6b2ce7fbd9aeac1db22460d2013a3fbVendor (CNA)
Linux Linuxcbc9982c8573fb9e35040063aa78c8ebe768a1ffVendor (CNA)
Linux Linuxd4f84bfa089fe71f775d25beb29303e844494c25Vendor (CNA)
Linux Linuxeb7cb798e563b3f3b3baeb9cc6f7455764267e50Vendor (CNA)
Linux Linuxee7a8335069150c3f1893a697ab30bbeca00d796Vendor (CNA)
Linux Linuxee914ef54a7e707453ecb43eb30fb0a5c6dd0d69Vendor (CNA)
debian:linux6.1.180-1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

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References

Show all references (6 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records