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SUSE Linux Micro 6.0 Kernel RT Important Patch 2026-21508 CVE-2025-38375

suse
Calendar Grey May 7, 2026
Dist Suse Esm H88
Update for SUSE Linux Enterprise Micro 6.0 fixes six critical issues. Implement now for improved security and stability.
An update that solves six vulnerabilities can now be installed.

Summary

## This update for the SUSE Linux Enterprise Kernel 6.4.0-31.1 fixes various security issues The following security issues were fixed: * CVE-2025-38375: virtio-net: ensure the received length does not exceed allocated size (bsc#1258073). * CVE-2025-39977: futex: Prevent use-after-free during requeue-PI (bsc#1252048). * CVE-2025-71066: net/sched: ets: Always remove class from active list before deleting in ets_qdisc_change (bsc#1258005). * CVE-2026-23004: dst: fix races in rt6_uncached_list_del() and rt_del_uncached_list() (bsc#1258655). * CVE-2026-23204: net/sched: cls_u32: use skb_header_pointer_careful() (bsc#1259126). * CVE-2026-31431: crypto: algif_aead - Revert to operating out-of-place (bsc#1263689). ## Patch Instructions:

Topics%20covered

Topics Covered

security advisory security issue important threat mitigation SuSE Linux kernel-rt

References

* bsc#1252048

* bsc#1258005

* bsc#1258073

* bsc#1258655

* bsc#1259126

* bsc#1263689

Cross-

* CVE-2025-38375

* CVE-2025-39977

* CVE-2025-71066

* CVE-2026-23004

* CVE-2026-23204

* CVE-2026-31431

CVSS scores:

* CVE-2025-38375 ( SUSE ): 7.3

CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

* CVE-2025-38375 ( SUSE ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

* CVE-2025-38375 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

* CVE-2025-39977 ( SUSE ): 7.3

CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

* CVE-2025-39977 ( SUSE ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

* CVE-2025-71066 ( SUSE ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

* CVE-2026-23004 ( SUSE ): 7.3

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:21508-1
Release Date: 2026-05-05T13:07:20Z
Rating: important

Topics%20covered

Topics Covered

security advisory security issue important threat mitigation SuSE Linux kernel-rt

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