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...

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 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 – 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 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: fixed a race condition in mptcppmnlflushaddrsdoit Eulgyu Kim reported crashes in mptcppmnlgetlocalid and/or mptcppmnlisbackup The root cause is the listspliceinit function in mptcppmnlflushaddrsdoit, which is not ready...

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...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: mptcp: handle large GSO sizes After the committed code below, TCP sockets and MPTCP subflows can generate egress packets that are larger than 64K. This exceeds the maximum DSS data size; the packet length is misrepresented over t...

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

In the Linux kernel, the following vulnerability has been resolved: mptcp: Ensure that snduna is properly initialized upon connection. This issue is strictly related to the commit fb7a0d334894 „mptcp: Ensure that sndnxt is properly initialized upon connection“. It turns out that syzkaller can...

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

In the Linux kernel, the following vulnerability has been resolved: mptcp: Ensure that sndnxt is properly initialized upon connection. Christoph reported a crash hinting at a corrupted snduna: WARNING: CPU: 1 PID: 38 at net/mptcp/protocol.c:1005 mptcpcleanuna+0x4b3/0x620 net/mptcp/protocol.c:1005...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: mptcp: Fallback earlier on simultaneous connections Syzkaller reports a race condition in simultaneous connections that leads to inconsistent fallback behavior. Status: WARNING: CPU: 3 PID: 33 at net/mptcp/subflow.c:1515...

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 in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: mptcp: The issue related to “slab-use-after-free” in inetlookupestablished has been fixed. The lookups in the ehash table are performed without locking, and they rely on SLABTYPESAFEBYRCU to ensure the stability of socket memory...