CVE-2026-46158

The CVE-2026-46158 issue is in the Linux kernel MPTCP implementation: when ADD_ADDR is retransmitted, the socket reference count may not be released reliably, creating a potential resource leak. The fix adds a proper exit path to call sock_put (__sock_put) at the end of the handling and removes a...

CVE-2026-45889

A flaw was found in the Linux kernel's Multipath TCP MPTCP implementation. This vulnerability occurs due to incorrect accounting for out-of-order OoO data in the mptcprcvbufgrow function. A subtle and very unlikely race condition could lead to a divide-by-zero error, potentially causing a system...

CVE-2026-46137: Concurrent Execution using Shared Resource with Improper Synchronization

In the Linux kernel, the following vulnerability has been resolved: mptcp: pm: ADDADDR rtx: fix potential data-race This mptcppmaddtimer helper is executed as a timer callback in softirq context. To avoid any data races, the socket lock needs to be held with bhlocksock. If the socket is in use,...

CVE-2026-46168: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: mptcp: fix scheduling with atomic in timestamp sockopt Using locksockfast atomic context around socksettimestamp and socksettimestamping is unsafe, as both helpers can sleep. Replace locksockfast with sleepable locksock/releaseso...

CVE-2026-46158: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: mptcp: pm: ADDADDR rtx: always decrease sk refcount When an ADDADDR is retransmitted, the sk is held in skresettimer. It should then be released in all cases at the end. Some unlikely checks were returning directly instead of...

CVE-2026-46170: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: mptcp: pm: ADDADDR rtx: free sk if last When an ADDADDR is retransmitted, the sk is held in skresettimer, and released at the end. If at that moment, it was the last reference being held, the sk would not be freed. sockput should...

UBUNTU-CVE-2026-45889

In the Linux kernel, the following vulnerability has been resolved: mptcp: do not account for OoO in mptcprcvbufgrow MPTCP-level OoOs are physiological when multiple subflows are active concurrently and will not cause retransmissions nor are caused by drops. Accounting for them in mptcprcvbufgrow...

CVE-2026-45889: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: mptcp: do not account for OoO in mptcprcvbufgrow MPTCP-level OoOs are physiological when multiple subflows are active concurrently and will not cause retransmissions nor are caused by drops. Accounting for them in mptcprcvbufgrow...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: mptcp: Ensure that the tx-skbs always have the MPTCP extensions. Due to signed/unsigned comparison, the expression: info-sizegoal - skb-len 0 evaluates to true when the size goal is smaller than the skb size. This results in a la...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: mptcp: fixed the NULL pointer dereferencing issue in the early fallback to fastopen. In the event of an early fallback to TCP, subflowsynrecvsock deletes the subflow context before returning the newly allocated socket to the...

CLSA-2026-1778769697 kernel: Fix of 31 CVEs

net: skbuff: propagate shared-frag marker through pskbcopy - HID: ignore non-functional sensor in HP 5MP Camera CVE-2025-21992 - net: fix crash when config small gsomaxsize/gsoipv4maxsize CVE-2024-50258 - ipv4: iptunnel: Fix suspicious RCU usage warning in iptunnelinitflow CVE-2024-53042 - ALSA:...

CVE-2026-43252

A flaw was found in the MultiPath TCP MPTCP subsystem of the Linux kernel. A local attacker could exploit a logic error in how MPTCP manages network connection endpoints. By performing a specific sequence of operations, an attacker could trigger a kernel warning, potentially leading to system...

EUVD-2026-27811

In the Linux kernel, the following vulnerability has been resolved: mptcp: pm: in-kernel: always set ID as avail when rm endp Syzkaller managed to find a combination of actions that was generating this warning: WARNING: net/mptcp/pmkernel.c:1074 at marksubflowendpavailable net/mptcp/pmkernel.c:10...

CVE-2026-43252: Improper Locking

In the Linux kernel, the following vulnerability has been resolved: mptcp: pm: in-kernel: always set ID as avail when rm endp Syzkaller managed to find a combination of actions that was generating this warning: WARNING: net/mptcp/pmkernel.c:1074 at marksubflowendpavailable net/mptcp/pmkernel.c:10...

CVE-2026-43029 mptcp: fix soft lockup in mptcp_recvmsg()

In the Linux kernel, the following vulnerability has been resolved: mptcp: fix soft lockup in mptcprecvmsg syzbot reported a soft lockup in mptcprecvmsg 0. When receiving data with MSGPEEK | MSGWAITALL flags, the skb is not removed from the skreceivequeue. This causes skwaitdata to always find...

CVE-2026-43029

In the Linux kernel, the following vulnerability has been resolved: mptcp: fix soft lockup in mptcprecvmsg syzbot reported a soft lockup in mptcprecvmsg 0. When receiving data with MSGPEEK | MSGWAITALL flags, the skb is not removed from the skreceivequeue. This causes skwaitdata to always find...

CVE-2026-43029 mptcp: fix soft lockup in mptcp_recvmsg()

In the Linux kernel, the following vulnerability has been resolved: mptcp: fix soft lockup in mptcprecvmsg syzbot reported a soft lockup in mptcprecvmsg 0. When receiving data with MSGPEEK | MSGWAITALL flags, the skb is not removed from the skreceivequeue. This causes skwaitdata to always find...

CVE-2026-43029: Improper Locking

In the Linux kernel, the following vulnerability has been resolved: mptcp: fix soft lockup in mptcprecvmsg syzbot reported a soft lockup in mptcprecvmsg 0. When receiving data with MSGPEEK | MSGWAITALL flags, the skb is not removed from the skreceivequeue. This causes skwaitdata to always find...

Linux kernel 安全漏洞

Linux kernel is the kernel used by Linux, the open source operating system of the Linux Foundation in the United States. A security vulnerability exists in the Linux kernel that stems from the mptcprecvmsg function in mptcp not keeping track of the last snooped skb when using MSGPEEK, which could...

Important: kernel6.12

Issue Overview: In the Linux kernel, the following vulnerability has been resolved: netfilter: ctnetlink: remove refcounting in expectation dumpers CVE-2025-39764 In the Linux kernel, the following vulnerability has been resolved: ipv6: use RCU in ip6xmit CVE-2025-40135 In the Linux kernel, the...