CVE-2026-97567

A flaw was found in the Linux kernel's MultiPath TCP MPTCP subsystem. A race condition can occur between socket disconnection and packet retransmission timer handling, resulting in an inconsistent socket state. A local user can exploit this timing flaw during active connection teardown to cause a...

CVE-2026-97566

A flaw was found in the Linux kernel. When removing an initial endpoint in the Multipath TCP MPTCP path manager, the system fails to clear pending address announcements, leaving stale entries in memory. A local user can exploit this vulnerability by manipulating MPTCP endpoint configurations, whi...

CVE-2026-97524

A flaw was found in the Linux kernel's MultiPath TCP MPTCP subsystem. Under specific network error and subflow reset conditions during data receive operations, the kernel can enter a recursive call loop that attempts to acquire an already-held data lock. A remote attacker communicating over an...

CVE-2026-97523

A flaw was found in the Linux kernel's MultiPath TCP MPTCP subsystem. A race condition between the packet scheduler and socket state transitions can cause the maximum segment size to be reset to zero following a transmission failure. An attacker could exploit this flaw during connection handling ...

CVE-2026-97522

A flaw was found in the Linux kernel's MultiPath TCP MPTCP subsystem. When an error occurs while pushing pending data across subflows, the kernel improperly updates the transmitted byte counter with a negative error code instead of only accounting for successful transmissions. This accounting...

Ubuntu 24.04 LTS : Linux kernel (Azure CVM) vulnerabilities (USN-8793-1)

The remote Ubuntu 24.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-8793-1 advisory. Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in...

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...

USN-8793-2: Linux kernel (Azure CVM) vulnerabilities

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - Bluetooth drivers; - GPU drivers; - Hardware monitoring drivers; - SPI subsystem; - NTFS3 file system; - iouring...

USN-8793-2 linux-azure-fde-6.8 vulnerabilities

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - Bluetooth drivers; - GPU drivers; - Hardware monitoring drivers; - SPI subsystem; - NTFS3 file system; - iouring...

USN-8793-1: Linux kernel (Azure CVM) vulnerabilities

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - Bluetooth drivers; - GPU drivers; - Hardware monitoring drivers; - SPI subsystem; - NTFS3 file system; - iouring...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: mptcp: avoid deadlock on fallback while reinjecting Jakub reported a MPTCP deadlock at the time of fallback: WARNING: possible recursive locking detected 6.18.0-rc7-virtme 1 Not tainted -------------------------------------------...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: mptcp: pm: The possibility of a Use-after-Free condition arises when selecting an endpoint by using selectendpoint. The functions selectlocaladdress and selectsignaladdress both select an endpoint entry from a list within the...

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 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: Use the appropriate destructor for IPv6. Previously, only the destructor from the TCP request sock in IPv4 was called, even if the subflow was IPv6. It is important to use the correct destructor to avoid memory leaks with...

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

In the Linux kernel, the following vulnerabilities have been resolved: mptcp: always handle address removal under msk socket lock Syzkaller reported a lockdep splat in the PM control path: WARNING: CPU: 0 PID: 6693 at ./include/net/sock.h:1711 sockownedbyme include/net/sock.h:1711 inline WARNING:...

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

In the Linux kernel, the following vulnerabilities have been resolved: TCP: Fixed corruption in MPTCP’s DSS due to large PMTU transmissions. Syzkaller was able to trigger DSS corruption: - TCP: requestsocksubflowv4: Possible SYN flooding on port :::20002. Sending cookies. ------------ Cut here...

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: handles DDS corruption consistently. The buggy peer implementation can send corrupted DSS options, consistently causing several warnings in the data path. Use DEBUGNET assertions to avoid errors on some builds and to handl...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: mptcp: fixed a double-free on the socket destructor function When an MPTCP server accepts an incoming connection, it clones its listener socket. However, the pointer to ‘inetopt’ for the new socket has the same value as the...

Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: In mptcp, the task of cleaning up subflows has been moved to mptcpDestroyCommon. If the creation of a mptcp socket fails due to the CGROUPINETSOCKCREATE eBPF program, the MPTCP protocol ends up leaking all subflows. This related...