net/mlx5: LAG, Fix off-by-one in single-FDB error rollback (CVE-2026-72345) | HOL Guard CVE

High · CVSS 7.8CVE-2026-72345

net/mlx5: LAG, Fix off-by-one in single-FDB error rollback

Answer in brief

CVE-2026-72345 records a High severity (CVSS 7.8) vulnerability in net/mlx5: LAG, Fix off-by-one in single-FDB error rollback. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 15, 2026Updated Aug 17, 2026Source checked Oct 1, 2026First seen by HOL Aug 15, 2026Material review Aug 17, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.8
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=ddbb5ddc43ad000a984149db5af1133433938404 <40cc06bf71476932e5d139fa326dcd0372766e16 \|\| >=ddbb5ddc43ad000a984149db5af1133433938404 <0f0e4ae6975c773f7854fc48932a267f6c79088f	40cc06bf71476932e5d139fa326dcd0372766e16, 0f0e4ae6975c773f7854fc48932a267f6c79088f
Linux/Linuxgeneric	6.14	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 40cc06bf71476932e5d139fa326dcd0372766e16 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 15, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: net/mlx5: LAG, Fix off-by-one in single-FDB error rollback On failure at index i, the reverse cleanup loop in mlx5_lag_create_single_fdb() starts from i, so the failed index itself is rolled back. That can operate on uninitialized state or double-tear-down a rule the add_one path already self-rolled-back. Start the rollback from i - 1 so only successfully-installed entries are undone.

Quoted source text, attributed separately from HOL analysis.