SUSE: Critical Security Fixes for Linux Kernel RT SUSE-SU-2025:02637-1
suse
August 4, 2025
* bsc#1245776 * bsc#1245793 * bsc#1245797 Cross-References:
Summary
## This update for the Linux Kernel 6.4.0-150600_10_34 fixes several issues. The following security issues were fixed: * CVE-2025-37797: net_sched: hfsc: Fix a UAF vulnerability in class handling (bsc#1245793). * CVE-2025-37752: net_sched: sch_sfq: move the limit validation (bsc#1245776). * CVE-2025-21702: pfifo_tail_enqueue: Drop new packet when sch->limit == 0 (bsc#1245797). ## Patch Instructions: To install this SUSE update use the SUSE recommended installation methods like YaST online_update or "zypper patch". Alternatively you can run the command listed for your product: * SUSE Linux Enterprise Live Patching 12-SP5 zypper in -t patch SUSE-SLE-Live-Patching-12-SP5-2025-2637=1 SUSE-SLE-Live- Patching-12-SP5-2025-2622=1 SUSE-SLE-Live-Patching-12-SP5-2025-2663=1 * openSUSE Leap 15.3
Topics Covered
References
* bsc#1245776
* bsc#1245793
* bsc#1245797
Cross-
* CVE-2025-21702
* CVE-2025-37752
* CVE-2025-37797
CVSS scores:
* CVE-2025-21702 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
* CVE-2025-37752 ( SUSE ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
* CVE-2025-37797 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected Products:
* openSUSE Leap 15.3
* openSUSE Leap 15.5
* SUSE Linux Enterprise High Performance Computing 12 SP5
* SUSE Linux Enterprise High Performance Computing 15 SP3
* SUSE Linux Enterprise High Performance Computing 15 SP5
* SUSE Linux Enterprise Live Patching 12-SP5
* SUSE Linux Enterprise Live Patching 15-SP3
* SUSE Linux Enterprise Live Patching 15-SP5
* SUSE Linux Enterprise Live Patching 15-SP6
* SUSE Linux Enterprise Micro 5.1
PREVIOUS
NEXT
Severity
important
Lowest
Low
Medium
High
Critical
Announcement ID: SUSE-SU-2025:02637-1
Release Date: 2025-08-04T11:34:13Z
Rating: important
Topics Covered
Get the latest News and Insights
Get the latest Linux and open source security news straight to your inbox.
Related News
Powered By
Linux Security - Your source for Top Linux News, Advisories, HOWTOs and Feature Releases
QUICK LINKS
subscribe to newsletters!
Like staying secure? So do we.
Sign up for updates, tips, and alerts!