CVE-2026-31746 PUBLISHED

s390/zcrypt: Fix memory leak with CCA cards used as accelerator

Assigner: Linux
Reserved: 09.03.2026 Published: 01.05.2026 Updated: 01.05.2026

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.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from 57db62a130ce69e6f3a870cf1119d8f860391f97 to 586222c37d4027dbf60a604fbe820184fee7c1c9 (excl.)
  • affected from 57db62a130ce69e6f3a870cf1119d8f860391f97 to ace37bfec3822033e59fff390f2ff99fc96ebe4f (excl.)
  • affected from 57db62a130ce69e6f3a870cf1119d8f860391f97 to c8d46f17c2fc7d25c18e60c008928aecab26184d (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 6.16 is affected
  • unaffected from 0 to 6.16 (excl.)
  • unaffected from 6.18.22 to 6.18.* (incl.)
  • unaffected from 6.19.12 to 6.19.* (incl.)
  • unaffected from 7.0 to * (incl.)

References