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Back to active CVEs
Unknown severity · Source severity not reportedCVE-2026-31746

s390/zcrypt: Fix memory leak with CCA cards used as acceleratorCVE-2026-31746

Answer in brief

CVE-2026-31746 records a Unknown severity vulnerability in s390/zcrypt: Fix memory leak with CCA cards used as accelerator. 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 May 1, 2026Updated Oct 21, 2026Source checked Oct 21, 2026First seen by HOL Oct 21, 2026Material review Oct 21, 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
PackageAffected rangeFixed version
Linux/Linuxgeneric>=919b3885c293057061af32dfeb0e20bba4f7a378 <1650268579e1113b30402dbcca4dba6589a0fccf || >=57db62a130ce69e6f3a870cf1119d8f860391f97 <586222c37d4027dbf60a604fbe820184fee7c1c9 || >=57db62a130ce69e6f3a870cf1119d8f860391f97 <ace37bfec3822033e59fff390f2ff99fc96ebe4f || >=57db62a130ce69e6f3a870cf1119d8f860391f97 <c8d46f17c2fc7d25c18e60c008928aecab26184d1650268579e1113b30402dbcca4dba6589a0fccf, 586222c37d4027dbf60a604fbe820184fee7c1c9, ace37bfec3822033e59fff390f2ff99fc96ebe4f, c8d46f17c2fc7d25c18e60c008928aecab26184d
Linux/Linuxgeneric6.16Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
  2. 2Review the reported fix. Update Linux/Linux to 1650268579e1113b30402dbcca4dba6589a0fccf if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    May 1, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 21, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 21, 2026

Sources and claim methodology

  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
Upstream source description

In the Linux kernel, the following vulnerability has been resolved: s390/zcrypt: Fix memory leak with CCA cards used as accelerator Tests showed that there is a memory leak if CCA cards are used as accelerator for clear key RSA requests (ME and CRT). With the last rework for the memory allocation the AP messages are allocated by ap_init_apmsg() but for some reason on two places (ME and CRT) the older allocation was still in place. So the first allocation simple was never freed.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
Not reported
Source
CVE List V5
Source checked
Oct 21, 2026
References
4 linked sources
Open source record