CLSA-2025-1757961864 kernel: Fix of 34 CVEs

inet: fully convert sk-skrxdst to RCU rules CVE-2021-47103 - ALSA: usb-audio: Fix out of bounds reads when finding clock sources CVE-2024-53150 - posix-cpu-timers: fix race between handleposixcputimers and posixcputimerdel CVE-2025-38352 - can: peakusb: fix use after free bugs CVE-2021-47670 -...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, and Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: mptcp: fixed a NULL pointer in canacceptnewsubflow. When testing the valkey benchmark tool with MPTCP, the kernel panics in mptcpcanacceptnewsubflow because subflowreq-msk is NULL. Call trace: mptcpcanacceptnewsubflow...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: mptcp: The “kern” flag was removed from fallback sockets. The mptcp ULP extension relies on ensuring that sk-sksockkern is set correctly. This prevents the call to setsockoptfd, IPPROTOTCP, TCPULP, "mptcp", 6 from working for pla...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: mptcp: ensure context reset on disconnect After the committed code below, if the MPC subflow is already in the TCPCLOSE status or has fallen back to TCP at the mptcpdisconnect time, mptcpdofastclose skips setting the sendfastclos...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: mptcp: Race conditions between subflow failures and additional subflow creations. We have race conditions similar to those addressed by the previous patch, between subflow failures and additional subflow creations. However, these...

Astra Linux – vulnerability in linux-5.10, linux-6.1, linux-5.15

In the Linux kernel, the following vulnerability has been resolved: mptcp: handle consistently DSS corruption The buggy peer implementation can send corrupted DSS options, resulting in several warnings along the data path. Utilize DEBUGNET assertions to prevent crashes on certain builds and ensur...

Astra Linux – Vulnerability found in Linux 6.1, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: mptcp: Race condition in the creation of subflows in mptcprcvspaceadjust. Additional active subflows—i.e., those created by the kernel’s internal processes—are included in the subflow list before the 3whs process starts. If a rac...

Astra Linux – Vulnerability found in Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: mptcp: fixed the issue of re-injecting stale data from stale subflows. When the MPTCP Process Manager detects that a subflow is stale, the packet scheduler must re-inject all the unacknowledged data at the mptcp level. To avoid...

CVE-2026-97524

In the Linux kernel, the following vulnerability has been resolved: mptcp: avoid unneeded actions on subflow reset Once in a blue moon, the mptcp receive path can recursively call mptcpdataready via state change under unlucky error conditions, and then try to hold the data lock again. Break the...

CVE-2026-97524

In the Linux kernel, the following vulnerability has been resolved: mptcp: avoid unneeded actions on subflow reset Once in a blue moon, the mptcp receive path can recursively call mptcpdataready via state change under unlucky error conditions, and then try to hold the data lock again. Break the...

PT-2026-98508

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the mptcp syncookies implementation where an uninitialised bit is used when copying information within the subflow ulp clone function. Recommendations At the moment,...

PT-2026-98462

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the Multipath TCP MPTCP implementation where incorrect accounting occurs within the mptcp subflow push pending function. If the subflow push pending function returns a...

PT-2026-98464

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the mptcp receive path where, under specific error conditions, the system can recursively call the mptcp data ready function via a state change, leading to an attempt ...

Astra Linux – Vulnerability found in Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: For mptcp: pm: only decrement addaddraccepted for MPJ requests. The following warning has been added: WARNONONCEmsk-pm.addaddraccepted == 0 … Adding this warning before decrementing the addaddraccepted counter helped to identify ...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: mptcp: pm: in-kernel: always marking signal+subflow endp as used Syzkaller managed to find a combination of actions that caused this warning to occur: msk-pm.localaddrused == 0 WARNING: net/mptcp/pmkernel.c:1071 at...

Astra Linux – Vulnerability found in Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: mptcp: Use OPTIONMPTCPMPJSYNACK in subflowfinishconnect subflowfinishconnect uses four fields backup, joinid, thmac, none that may contain garbage unless OPTIONMPTCPMPJSYNACK has been set in mptcpParseOption...

Linux Distros Unpatched Vulnerability : CVE-2026-89554

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - mptcp: fix uninitialized localid in syncookie MPJOIN reconstruction mptcptokenjoincookieinitstate restores remotenonce, localnonce, backup, joinid, token and ms...

CVE-2026-89554

In the Linux kernel, the following vulnerability has been resolved: mptcp: fix uninitialized localid in syncookie MPJOIN reconstruction mptcptokenjoincookieinitstate restores remotenonce, localnonce, backup, joinid, token and msk from the saved cookie entry when rebuilding the request socket for ...

CVE-2026-89554 mptcp: fix uninitialized local_id in syncookie MP_JOIN reconstruction

In the Linux kernel, the following vulnerability has been resolved: mptcp: fix uninitialized localid in syncookie MPJOIN reconstruction mptcptokenjoincookieinitstate restores remotenonce, localnonce, backup, joinid, token and msk from the saved cookie entry when rebuilding the request socket for ...

EUVD-2026-76465

In the Linux kernel, the following vulnerability has been resolved: mptcp: fix uninitialized localid in syncookie MPJOIN reconstruction mptcptokenjoincookieinitstate restores remotenonce, localnonce, backup, joinid, token and msk from the saved cookie entry when rebuilding the request socket for ...