CVE-2026-31746s390/zcrypt: Fix memory leak with CCA cards used as accelerator
- 5.5MediumCVSS base score
- 0.15%Exploitation in 30 daysEPSS · top 95% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 53 days later
· 53 days later
Published
- 6 months later
· 6 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.15% · top 95% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected 919b3885c293057061af32dfeb0e20bba4f7a378 – < 1650268579e1113b30402dbcca4dba6589a0fccf
- affected 57db62a130ce69e6f3a870cf1119d8f860391f97 – < 586222c37d4027dbf60a604fbe820184fee7c1c9
- affected 57db62a130ce69e6f3a870cf1119d8f860391f97 – < ace37bfec3822033e59fff390f2ff99fc96ebe4f
- affected 57db62a130ce69e6f3a870cf1119d8f860391f97 – < c8d46f17c2fc7d25c18e60c008928aecab26184d
- affected 6.16
- unaffected < 6.16
- unaffected 6.18.22 – ≤ 6.18.*
- unaffected 6.19.12 – ≤ 6.19.*
- unaffected 7.0 – ≤ *
References
References4
- https://git.kernel.org/stable/c/1650268579e1113b30402dbcca4dba6589a0fccf (opens in a new tab)
- https://git.kernel.org/stable/c/586222c37d4027dbf60a604fbe820184fee7c1c9 (opens in a new tab)
- https://git.kernel.org/stable/c/ace37bfec3822033e59fff390f2ff99fc96ebe4f (opens in a new tab)
- https://git.kernel.org/stable/c/c8d46f17c2fc7d25c18e60c008928aecab26184d (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-26559 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-31746)Record last updated .