afs: Fix lack of locking around modifications of net->cells_dyn_ino (CVE-2026-72372) | HOL Guard CVE

High · CVSS 7.8CVE-2026-72372

afs: Fix lack of locking around modifications of net->cells_dyn_ino

Answer in brief

CVE-2026-72372 records a High severity (CVSS 7.8) vulnerability in afs: Fix lack of locking around modifications of net->cells_dyn_ino. 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 Sep 29, 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	>=537b0105952578531f748c7fb3ce36ae9a514784 <4d8a2fe8847859f4fa4e9a2fa1221c9c1158e66b \|\| >=1d0b929fc070b4115403a0a6206a0c6a62dd61f5 <2ffb70a8a01988046bb207b7d0af9358a8337378 \|\| >=1d0b929fc070b4115403a0a6206a0c6a62dd61f5 <e94f92fd56c553a8bf9421c3289e1b85c7c08857 \|\| >=1d0b929fc070b4115403a0a6206a0c6a62dd61f5 <55e841836c6f4646490f7b0347192b7a92d431ba \|\| >=6.12.97 <6.12.101	4d8a2fe8847859f4fa4e9a2fa1221c9c1158e66b, 2ffb70a8a01988046bb207b7d0af9358a8337378, e94f92fd56c553a8bf9421c3289e1b85c7c08857, 55e841836c6f4646490f7b0347192b7a92d431ba, 6.12.101
Linux/Linuxgeneric	6.15	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 4d8a2fe8847859f4fa4e9a2fa1221c9c1158e66b 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: afs: Fix lack of locking around modifications of net->cells_dyn_ino Fix the lack of locking around modifications of net->cells_dyn_ino by taking net->cells_lock exclusively. This also requires to cell to be removed from net->cells_dyn_ino in afs_destroy_cell_work() rather than in afs_cell_destroy() as the latter runs in RCU cleanup context and sleeping locks cannot be taken there.

Quoted source text, attributed separately from HOL analysis.