TI-2026-24302 Aliases CVE-2026-31746 GHSA-rvh3-5jfr-6p58

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

LOW 24CWE-401Published 2026-05-01 · Updated 2026-10-21

Key facts

Attack vector: Local
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-401.

Summary

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.

Why it matters now

EPSS 0.00155 4th percentileScored 2026-11-07

Fix Fixed Linux (Linux): 6.18.22, 6.19.12, 7.0

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Linux	Linux	6.16 and later	6.18.22, 6.19.12, 7.0	Patch available	CNA

Linux VendorLinux Affected 6.16 and later Fixed in 6.18.22, 6.19.12, 7.0 Patch available CNA

CPE configurations NVD · 7

CPE	Versions	Role	Vendor
cpe:2.3:o:linux:linux_kernel::::::::	6.16 to before 6.18.22; 6.19 to before 6.19.12	Vulnerable	Linux
cpe:2.3:o:linux:linux_kernel:7.0:rc1::::::	7.0 rc1	Vulnerable	Linux
cpe:2.3:o:linux:linux_kernel:7.0:rc2::::::	7.0 rc2	Vulnerable	Linux
cpe:2.3:o:linux:linux_kernel:7.0:rc3::::::	7.0 rc3	Vulnerable	Linux
cpe:2.3:o:linux:linux_kernel:7.0:rc4::::::	7.0 rc4	Vulnerable	Linux
cpe:2.3:o:linux:linux_kernel:7.0:rc5::::::	7.0 rc5	Vulnerable	Linux
cpe:2.3:o:linux:linux_kernel:7.0:rc6::::::	7.0 rc6	Vulnerable	Linux

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 6.16 to before 6.18.22; 6.19 to before 6.19.12 Vulnerable ·Linux
cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:* Versions 7.0 rc1 Vulnerable ·Linux
cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:* Versions 7.0 rc2 Vulnerable ·Linux
cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:* Versions 7.0 rc3 Vulnerable ·Linux
cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:* Versions 7.0 rc4 Vulnerable ·Linux
cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:* Versions 7.0 rc5 Vulnerable ·Linux
cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:* Versions 7.0 rc6 Vulnerable ·Linux

Remediation

Fix · CNA Linux (Linux) Fixed in 6.18.22, 6.19.12, 7.0

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 5 products

Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9

Timeline

2026-10-02 Threatist record created from CVE-2026-31746
2026-10-03 Alias added: GHSA-rvh3-5jfr-6p58
2026-10-21 Fix available: Linux/Linux@1650268579e1113b30402dbcca4dba6589a0fccf · CNA
2026-10-21 1 new reference · CNA

References

Patch 3

Other 1

https://git.kernel.org/stable/c/1650268579e1113b30402dbcca4dba6589a0fccf

TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3

See all 15278 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences