s390/crypto: Fix wrong return code to engine in asynch callbacks (CVE-2026-97589) | HOL Guard CVE

High · CVSS 7.0CVE-2026-97589

s390/crypto: Fix wrong return code to engine in asynch callbacks

Answer in brief

CVE-2026-97589 records a High severity (CVSS 7.0) vulnerability in s390/crypto: Fix wrong return code to engine in asynch callbacks. 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 25, 2026Updated Sep 25, 2026Source checked Sep 25, 2026First seen by HOL Sep 25, 2026Material review Sep 25, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.0
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 7.0. 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	>=6cd87cb5ef6ca50ae17c371482ceaab1d635e232 <972e0d9b7d1d112240ccde1f1be85bf9ffaa1720 \|\| >=6cd87cb5ef6ca50ae17c371482ceaab1d635e232 <5480291aa848e19e61175abfd457933516db70c6 \|\| >=6cd87cb5ef6ca50ae17c371482ceaab1d635e232 <ac1481320110b803ab9b79ab4d2ca11a74fc05f2	972e0d9b7d1d112240ccde1f1be85bf9ffaa1720, 5480291aa848e19e61175abfd457933516db70c6, ac1481320110b803ab9b79ab4d2ca11a74fc05f2
Linux/Linuxgeneric	6.16	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 972e0d9b7d1d112240ccde1f1be85bf9ffaa1720 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 25, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: s390/crypto: Fix wrong return code to engine in asynch callbacks When crypto_finalize_hash_request() or crypto_finalize_skcipher_request() explicitly completes a request, the do_one_request callback must return 0 to indicate successful handling. Returning a negative error code causes the crypto engine to assume the driver failed to take ownership and triggers a second completion via crypto_request_complete(), resulting in a double completion. This pattern occurs in paes_s390.c 4 times and once in phmac_s390.c. Fixed in phmac_do_one_request() and all four paes do_one_request callbacks (ecb, cbc, ctr, xts) by returning 0 after explicit finalization instead of propagating the error code.

Quoted source text, attributed separately from HOL analysis.