crypto: krb5 - use kfree_sensitive() for derived key buffers (CVE-2026-80924) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-80924

crypto: krb5 - use kfree_sensitive() for derived key buffers

Answer in brief

CVE-2026-80924 records a Unknown severity vulnerability in crypto: krb5 - use kfree_sensitive() for derived key buffers. 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 Sep 9, 2026Updated Sep 9, 2026Source checked Sep 9, 2026First seen by HOL Sep 9, 2026Material review Sep 9, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. 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	>=3936f02bf2d3308a7359dd37dd96cd60603d8170 <731a5b6fb4c1705f9405d9029dd64ea81e336207 \|\| >=3936f02bf2d3308a7359dd37dd96cd60603d8170 <91b96dc9cc250cd16751f53de525cf3442ca0962 \|\| >=3936f02bf2d3308a7359dd37dd96cd60603d8170 <a1bf79365794783b19f5b09e8a23f7ee311e8931 \|\| >=3936f02bf2d3308a7359dd37dd96cd60603d8170 <f7d53dd3f267e46a784f219a75072f2f400d42b9	731a5b6fb4c1705f9405d9029dd64ea81e336207, 91b96dc9cc250cd16751f53de525cf3442ca0962, a1bf79365794783b19f5b09e8a23f7ee311e8931, f7d53dd3f267e46a784f219a75072f2f400d42b9
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 731a5b6fb4c1705f9405d9029dd64ea81e336207 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 9, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 9, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 9, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: crypto: krb5 - use kfree_sensitive() for derived key buffers crypto_krb5_prepare_encryption() and crypto_krb5_prepare_checksum() free the buffer holding the freshly derived keys with plain kfree(), leaving the key material behind in the freed slab object.

Quoted source text, attributed separately from HOL analysis.