SUSE-SU-2026:24487-1: Security update for the Linux Kernel (Live Patch 27 for SUSE Linux Enterprise Micro 6.0)
This update for the SUSE Linux Enterprise Kernel 6.4.0-50.2 fixes various security issues:
The following security issues were fixed:
- CVE-2026-53381: virtiofs: fix UAF on submount umount (bsc#1271837). - CVE-2026-63968: ipv6: fix possible infinite loop in fib6selectpath() (bsc#1272521). - CVE-2026-64217: netfs: Fix overrun check in netfsextractuseriter() (bsc#1272874). - CVE-2026-68426: xfrm: fix stale skb->prev after async crypto steals a GSO segment (bsc#1274712). - CVE-2026-74469: sctp: prevent peer transport count overflow (bsc#1280693). - CVE-2026-74669: ipvs: clear IPv4 options after rebasing tunnel ICMP errors (bsc#1277399). - CVE-2026-89544: SUNRPC: fix gssxdecoptionarray error path bugs (bsc#1280760). - CVE-2026-89551: SUNRPC: xdrbuftrim: clamp buf->len to avoid underflow (bsc#1280728). - CVE-2026-89674: nfsd: fix XDR length calculation in nfsd4ffencodelayoutget (bsc#1280285). - CVE-2026-98432: ipv4: free inetopt and ireqopt after an RCU grace period (bsc#1285686).
Other sources
This update for the SUSE Linux Enterprise Kernel 6.4.0-50.2 fixes various security issues: The following security issues were fixed: CVE-2026-53381: virtiofs: fix UAF on submount umount (bsc#1271837). CVE-2026-63968: ipv6: fix possible infinite loop in fib6selectpath() (bsc#1272521). CVE-2026-64217: netfs: Fix overrun check in netfsextractuseriter() (bsc#1272874). CVE-2026-68426: xfrm: fix stale skb->prev after async crypto steals a GSO segment (bsc#1274712). CVE-2026-74469: sctp: prevent peer transport count overflow (bsc#1280693). CVE-2026-74669: ipvs: clear IPv4 options after rebasing tunnel ICMP errors (bsc#1277399). CVE-2026-89544: SUNRPC: fix gssxdecoptionarray error path bugs (bsc#1280760). CVE-2026-89551: SUNRPC: xdrbuftrim: clamp buf->len to avoid underflow (bsc#1280728). CVE-2026-89674: nfsd: fix XDR length calculation in nfsd4ffencodelayoutget (bsc#1280285). CVE-2026-98432: ipv4: free inetopt and ireqopt after an RCU grace period (bsc#1285686).
— SUSE
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
suse/kernel-livepatch-MICRO-6-0_Update_27to a version that resolves this vulnerability.Fixed in 6-1.1 - Upgrade
Upgrade
suse/kernel-livepatchto a version that resolves this vulnerability.Fixed in 6_4_0-50-default-6-1.1 - Upgrade
Upgrade
suse/kernel-livepatchto a version that resolves this vulnerability.Fixed in 6_4_0-50-default-debuginfo-6-1.1 - Upgrade
Upgrade
suse/kernel-livepatch-MICROto a version that resolves this vulnerability.Fixed in 6-0_Update_27-debugsource-6-1.1 - Upgrade
Upgrade
SUSE Linux Enterprise Kernelto a version that resolves this vulnerability.Fixed in 6.4.0-50.2Patch SUSE-SLE-Micro-6.0-kernel-732
Event History
Child vulnerabilities
Contains the following vulnerabilities.
Frequently Asked Questions
Which kernel update should administrators target?
The advisory identifies the SUSE Linux Enterprise Kernel 6.4.0-50.2 update as containing the fixes.
Which subsystems are relevant for triage?
The fixes span virtiofs, IPv4 and IPv6 networking, xfrm, SCTP, IPVS, SUNRPC, NFS server support, and netfs. Systems using these kernel features are the most directly relevant for review.
Are configuration-specific exposure details or interim mitigations provided?
No. The advisory does not state affected default configurations, exploitation prerequisites, or mitigations to use when the update cannot be applied immediately.