SB20261009101 - SUSE update for the Linux Kernel (Live Patch 74 for SUSE Linux Enterprise 12 SP5)
Published: October 9, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 8 vulnerabilities.
1) Use-after-free (CVE-ID: CVE-2026-46116)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a use-after-free in __xfrm_state_delete when deleting xfrm_state list entries during xfrm_state lifecycle handling. A local user can trigger repeated deletion of the same xfrm_state object to cause a denial of service.
The issue was reproduced under syzkaller load during network namespace cleanup in the xfrm subsystem.
2) Double free (CVE-ID: CVE-2026-63888)
CWE-ID: CWE-415 - Double Free
CVSSv4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to a double free in iscsit_handle_text_cmd() when handling a Text PDU with a bad DataDigest on connections using ErrorRecoveryLevel greater than 0. A remote user can send a specially crafted text request to cause a denial of service.
On hardened kernels the flaw can trigger a remote kernel BUG(), while on non-hardened kernels it can corrupt the slab freelist. A follow-up Text Request on the same ITT or session teardown can free the same pointer again.
3) Out-of-bounds read (CVE-ID: CVE-2026-63888)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to an out-of-bounds read in iscsit_handle_text_cmd() when processing Text PDUs with DataDigest enabled. A remote user can send a specially crafted text request to cause a denial of service.
The issue is triggered when DataDigest is negotiated for the connection.
4) Out-of-bounds read (CVE-ID: CVE-2026-63920)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to disclose sensitive information.
The vulnerability exists due to an out-of-bounds read in ip6_datagram_recv_specific_ctl() when processing IPv6 extension headers for recvmsg control messages after the hdrlen field is modified. A local user can use an nftables payload-write expression to corrupt the extension header length and trigger copying beyond the available header data to disclose sensitive information.
Exploitation is reachable from an unprivileged user namespace.
5) Use-after-free (CVE-ID: CVE-2026-64011)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a use-after-free in llcp_sock_release() when releasing an LLCP socket in connecting state. A local user can trigger socket release in that state to cause a denial of service.
6) Out-of-bounds read (CVE-ID: CVE-2026-64114)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: 5.6 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to an out-of-bounds access in the raw_send_hdrinc IPv4 packet handling in the Linux kernel when processing a malformed IP_HDRINCL packet with an IPv4 header length value less than 5. A local user can send a specially crafted packet through a raw socket to cause a denial of service.
Exploitation requires CAP_NET_RAW. Triggering the reproduced crash path also requires a matching xfrm AH policy on the outgoing route, and loopback does not reach the affected path.
7) Use-after-free (CVE-ID: CVE-2026-68121)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 5.8 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause memory corruption.
The vulnerability exists due to a use-after-free in pppoe_sendmsg() when handling a blocked send while a non-Ethernet port is added to an empty team device. A local user can trigger skb head reallocation and subsequent writes through a stale PPPoE header pointer to cause memory corruption.
The issue occurs because device header callbacks may reallocate the skb head and invalidate saved pointers into it.
8) Use-after-free (CVE-ID: CVE-2026-68202)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a use-after-free in the ALSA sequencer queue timer handling in snd_seq_timer_delete() and related queue destruction logic when accessing /dev/snd/seq and re-opening a queue timer during queue teardown. A local user can issue crafted sequencer operations to leave a timer instance live and trigger a dereference of freed queue memory to cause a denial of service.
No queue ownership is required.
Remediation
Install update from vendor's website.