CVE-2026-74257

In the Linux kernel, the following vulnerability has been resolved: sockmap: Fix use-after-free in udpbpfrecvmsg syzbot reported use-after-free of struct skmsg in skmsgrecvmsg. 0 skmsgrecvmsg peeks skmsg from psock-ingressmsg under a lock, but its processing is lockless. Thus, skmsgrecvmsg must b...

CVE-2026-74257 sockmap: Fix use-after-free in udp_bpf_recvmsg()

In the Linux kernel, the following vulnerability has been resolved: sockmap: Fix use-after-free in udpbpfrecvmsg syzbot reported use-after-free of struct skmsg in skmsgrecvmsg. 0 skmsgrecvmsg peeks skmsg from psock-ingressmsg under a lock, but its processing is lockless. Thus, skmsgrecvmsg must b...

CVE-2026-74257

CVE-2026-74257 stems from a use-after-free in the Linux kernel sockmap path (udp_bpf_recvmsg) where sk_msg_recvmsg() can touch the same sk_msg when multiple threads race. The mitigation described in connected docs is to serialize sk_msg_recvmsg() by callers, specifically by adding a lock around u...

CVE-2026-74257 sockmap: Fix use-after-free in udp_bpf_recvmsg()

In the Linux kernel, the following vulnerability has been resolved: sockmap: Fix use-after-free in udpbpfrecvmsg syzbot reported use-after-free of struct skmsg in skmsgrecvmsg. 0 skmsgrecvmsg peeks skmsg from psock-ingressmsg under a lock, but its processing is lockless. Thus, skmsgrecvmsg must b...

CVE-2026-74257 sockmap: Fix use-after-free in udp_bpf_recvmsg()

In the Linux kernel, the following vulnerability has been resolved: sockmap: Fix use-after-free in udpbpfrecvmsg syzbot reported use-after-free of struct skmsg in skmsgrecvmsg. 0 skmsgrecvmsg peeks skmsg from psock-ingressmsg under a lock, but its processing is lockless. Thus, skmsgrecvmsg must b...

CVE-2026-74256

The CVE-2026-74256 family affects the Linux kernel’s BPF sockmap path, where bpf_msg_pop_data() bounds checks used 32-bit arithmetic on start/len. An unsigned-to-signed overflow could allow an out-of-range start/len, causing the pop loop to walk past scatterlist end and trigger put_page on an emp...

CVE-2026-74256 bpf, sockmap: fix integer overflow in bpf_msg_pop_data() bounds check

In the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: fix integer overflow in bpfmsgpopdata bounds check start and len are u32, so u64 last = start + len; evaluates start + len in 32-bit and wraps before storing it in last. The bounds check if start = offset + l || las...

CVE-2026-74256 bpf, sockmap: fix integer overflow in bpf_msg_pop_data() bounds check

In the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: fix integer overflow in bpfmsgpopdata bounds check start and len are u32, so u64 last = start + len; evaluates start + len in 32-bit and wraps before storing it in last. The bounds check if start = offset + l || las...

CVE-2026-74256: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: fix integer overflow in bpfmsgpopdata bounds check start and len are u32, so u64 last = start + len; evaluates start + len in 32-bit and wraps before storing it in last. The bounds check if start = offset + l || las...

PT-2026-72693

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A use-after-free issue exists in the udp bpf recvmsg function. The sk msg recvmsg function retrieves sk msg from psock-ingress msg under a lock, but the subsequent processing is lockless...

CVE-2026-74257: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: sockmap: Fix use-after-free in udpbpfrecvmsg syzbot reported use-after-free of struct skmsg in skmsgrecvmsg. 0 skmsgrecvmsg peeks skmsg from psock-ingressmsg under a lock, but its processing is lockless. Thus, skmsgrecvmsg must b...

Linux Distros Unpatched Vulnerability : CVE-2026-74257

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - sockmap: Fix use-after-free in udpbpfrecvmsg syzbot reported use-after-free of struct skmsg in skmsgrecvmsg. 0 skmsgrecvmsg peeks skmsg from psock-ingressmsg...

SUSE CVE-2026-68386

In the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: Reject unhashed UDP sockets on sockmap update UDP sockets get SOCKRCUFREE set when auto-bound. This means skisrefcountedunbound = true, while skisrefcountedbound = false. Because sockmap accepts unbound UDP sockets,...

CVE-2026-68284

A flaw was found in the Linux kernel. A use-after-free vulnerability exists in the tcpbpfsendmsg function within the BPF Berkeley Packet Filter and sockmap components. This flaw occurs when two threads attempt to send data on the same socket concurrently, leading to an incorrect memory...

CVE-2026-68386

A flaw was found in the Linux kernel. A local attacker with BPF program capabilities could exploit a vulnerability in the BPF sockmap feature. This occurs when a BPF program increments the reference count of an unbound UDP socket, and the socket is subsequently bound. This sequence of events caus...

bpf, sockmap: Reject unhashed UDP sockets on sockmap update

...

bpf, sockmap: Fix cork use-after-free in tcp_bpf_sendmsg()

...

CVE-2026-68386

In the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: Reject unhashed UDP sockets on sockmap update UDP sockets get SOCKRCUFREE set when auto-bound. This means skisrefcountedunbound = true, while skisrefcountedbound = false. Because sockmap accepts unbound UDP sockets,...

UBUNTU-CVE-2026-68386

In the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: Reject unhashed UDP sockets on sockmap update UDP sockets get SOCKRCUFREE set when auto-bound. This means skisrefcountedunbound = true, while skisrefcountedbound = false. Because sockmap accepts unbound UDP sockets,...

CVE-2026-68284

In the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: Fix cork use-after-free in tcpbpfsendmsg tcpbpfsendmsg keeps msgtx across skstreamwaitmemory, which drops and reacquires the socket lock. Its error path tries to decide whether msgtx names the local temporary messag...