SUSE-SU-2026:3593-1 Security update for the Linux Kernel

The SUSE Linux Enterprise 15 SP4 kernel was updated to fix various security issues: The following security issues were fixed: - CVE-2022-4994: KVM: x86: wean fast IN from emulatorpioin bsc1273097. - CVE-2023-53995: net: ipv4: fix one memleak in inetdelifa bsc1255616. - CVE-2026-46052: ceph: only...

CVE-2026-68162

A flaw was found in the Stream Control Transmission Protocol SCTP implementation within the Linux kernel. This Use-After-Free UAF vulnerability occurs during network namespace netns teardown. A local attacker with the ability to open a sysctl file could exploit this flaw, potentially leading to a...

netty-transport-sctp: Netty-transport-sctp: Denial of Service due to unbounded memory growth from SctpMessage fragments

A flaw was found in netty-transport-sctp. A remote attacker can exploit this vulnerability by sending specially crafted, non-complete Stream Control Transmission Protocol SCTP message fragments. This can lead to unbounded memory growth within the application, causing a Denial of Service DoS...

CVE-2026-68320

A flaw was found in the Linux kernel's Stream Control Transmission Protocol SCTP implementation. This vulnerability occurs because the sctpauthepaddchunkid function allows more data to be written than the allocated buffer can hold during the initialization of an SCTP association. A remote attacke...

CVE-2026-68161

A flaw was found in the Linux kernel's SCTP Stream Control Transmission Protocol implementation. When a network namespace netns is torn down, the associated SCTP UDP User Datagram Protocol tunnel sockets are not properly closed. This oversight can lead to a resource leak, potentially resulting in...

CVE-2026-68300

A flaw was found in the Stream Control Transmission Protocol SCTP authentication mechanism within the Linux kernel. The sctpauthchunkverify function incorrectly processes authentication chunks, leading to authentication requirements being silently bypassed. This can occur under specific condition...

CVE-2026-68376

A flaw was found in the Linux kernel's Stream Control Transmission Protocol SCTP implementation. An incorrect array size calculation for the authhmacs field within the sctpcookie structure could lead to a buffer overflow. During the initialization of an SCTP association, if four HMAC identifiers...

netty-transport-sctp: Netty-transport-sctp: Denial of Service due to unbounded memory growth from SctpMessage fragments

A flaw was found in netty-transport-sctp. A remote attacker can exploit this vulnerability by sending specially crafted, non-complete Stream Control Transmission Protocol SCTP message fragments. This can lead to unbounded memory growth within the application, causing a Denial of Service DoS...

CVE-2026-68315

A flaw was found in the Linux kernel's Stream Control Transmission Protocol SCTP implementation. When processing a Stream Reset Incoming Request RESETINREQUEST from a peer, the kernel does not properly validate the stream count. This can lead to an integer overflow when calculating the size for t...

The vulnerability of the sctp_process_asconf_param() function in the net/sctp/sm_make_chunk.c module of Linux kernel allows a hacker to elevate their privileges to the root level.

The vulnerability of the sctpprocessasconfparam function in the net/sctp/smmakechunk.c module of the Linux kernel is related to the pointer being dereferenced after its expiration time. Exploiting this vulnerability could allow a malicious actor to elevate their privileges to the root level...

CVE-2026-68376

In the Linux kernel, the following vulnerability has been resolved: sctp: fix authhmacs array size in struct sctpcookie The authhmacs array in struct sctpcookie is supposed to store a complete SCTPAUTHHMACALGO parameter, which consists of a struct sctpparamhdr followed by N HMAC identifiers...

CVE-2026-68315

In the Linux kernel, the following vulnerability has been resolved: sctp: validate stream count in sctpprocessstrresetinreq When processing a RESETINREQUEST from a peer, sctpprocessstrresetinreq derives the stream count from the parameter length but does not check whether the resulting...

CVE-2026-68300

In the Linux kernel, the following vulnerability has been resolved: sctp: auth: verify auth requirement when authchunk is NULL sctpauthchunkverify returns true unconditionally when chunk-authchunk is NULL, silently skipping authentication. This is incorrect when: 1. skbclone failed in the BH...

DEBIAN-CVE-2026-68300

In the Linux kernel, the following vulnerability has been resolved: sctp: auth: verify auth requirement when authchunk is NULL sctpauthchunkverify returns true unconditionally when chunk-authchunk is NULL, silently skipping authentication. This is incorrect when: 1. skbclone failed in the BH...

DEBIAN-CVE-2026-68162

In the Linux kernel, the following vulnerability has been resolved: sctp: avoid authenable sysctl UAF during netns teardown procsctpdoauth updates the SCTP control socket after changing net.sctp.authenable. The handler gets the per-net SCTP state from ctl-data, so an already opened sysctl file ca...

CVE-2026-68161

In the Linux kernel, the following vulnerability has been resolved: sctp: close UDP tunnel sockets during netns teardown procsctpdoudpport starts per-net SCTP UDP tunneling sockets when net.sctp.udpport is set, and stops/restarts them when the sysctl value changes. The netns exit path does not st...

CVE-2026-68162

In the Linux kernel, the following vulnerability has been resolved: sctp: avoid authenable sysctl UAF during netns teardown procsctpdoauth updates the SCTP control socket after changing net.sctp.authenable. The handler gets the per-net SCTP state from ctl-data, so an already opened sysctl file ca...

CVE-2026-68376

In the Linux kernel, the following vulnerability has been resolved: sctp: fix authhmacs array size in struct sctpcookie The authhmacs array in struct sctpcookie is supposed to store a complete SCTPAUTHHMACALGO parameter, which consists of a struct sctpparamhdr followed by N HMAC identifiers...

UBUNTU-CVE-2026-68320

In the Linux kernel, the following vulnerability has been resolved: sctp: fix authchunklist capacity check in sctpauthepaddchunkid sctpauthepaddchunkid uses SCTPNUMCHUNKTYPES 20 as the capacity limit for ep-authchunklist, allowing it to hold up to 20 chunk entries paramhdr.length up to 24. Howeve...

CVE-2026-68300

In the Linux kernel, the following vulnerability has been resolved: sctp: auth: verify auth requirement when authchunk is NULL sctpauthchunkverify returns true unconditionally when chunk-authchunk is NULL, silently skipping authentication. This is incorrect when: 1. skbclone failed in the BH...