Linux Kernel Security Vulnerabilities

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 reuse of skb memory after release in the canrestart function...

CVE-2025-22109

In the Linux kernel, the following vulnerability has been resolved: ax25: Remove broken autobind Binding AX25 socket by using the autobind feature leads to memory leaks in ax25connect and also refcount leaks in ax25release. Memory leak was detected with kmemleak:...

DEBIAN-CVE-2025-22077

In the Linux kernel, the following vulnerability has been resolved: Revert "smb: client: fix TCP timers deadlock after rmmod" This reverts commit e9f2517a3e18a54a3943c098d2226b245d488801. Commit e9f2517a3e18 "smb: client: fix TCP timers deadlock after rmmod" is intended to fix a null-ptr-deref in...

UBUNTU-CVE-2025-22077

In the Linux kernel, the following vulnerability has been resolved: Revert "smb: client: fix TCP timers deadlock after rmmod" This reverts commit e9f2517a3e18a54a3943c098d2226b245d488801. Commit e9f2517a3e18 "smb: client: fix TCP timers deadlock after rmmod" is intended to fix a null-ptr-deref in...

UBUNTU-CVE-2025-22109

In the Linux kernel, the following vulnerability has been resolved: ax25: Remove broken autobind Binding AX25 socket by using the autobind feature leads to memory leaks in ax25connect and also refcount leaks in ax25release. Memory leak was detected with kmemleak:...

DEBIAN-CVE-2025-22062

In the Linux kernel, the following vulnerability has been resolved: sctp: add mutual exclusion in procsctpdoudpport We must serialize calls to sctpudpsockstop and sctpudpsockstart or risk a crash as syzbot reported: Oops: general protection fault, probably for non-canonical address...

CVE-2025-22059

In the Linux kernel, the following vulnerability has been resolved: udp: Fix multiple wraparounds of sk-skrmemalloc. udpenqueuescheduleskb has the following condition: if atomicread&sk-skrmemalloc sk-skrcvbuf goto drop; sk-skrcvbuf is initialised by net.core.rmemdefault and later can be configure...

DEBIAN-CVE-2025-22059

In the Linux kernel, the following vulnerability has been resolved: udp: Fix multiple wraparounds of sk-skrmemalloc. udpenqueuescheduleskb has the following condition: if atomicread&sk-skrmemalloc sk-skrcvbuf goto drop; sk-skrcvbuf is initialised by net.core.rmemdefault and later can be configure...

UBUNTU-CVE-2025-22062

In the Linux kernel, the following vulnerability has been resolved: sctp: add mutual exclusion in procsctpdoudpport We must serialize calls to sctpudpsockstop and sctpudpsockstart or risk a crash as syzbot reported: Oops: general protection fault, probably for non-canonical address...

UBUNTU-CVE-2025-22059

In the Linux kernel, the following vulnerability has been resolved: udp: Fix multiple wraparounds of sk-skrmemalloc. udpenqueuescheduleskb has the following condition: if atomicread&sk-skrmemalloc sk-skrcvbuf goto drop; sk-skrcvbuf is initialised by net.core.rmemdefault and later can be configure...

CVE-2025-22109 ax25: Remove broken autobind

In the Linux kernel, the following vulnerability has been resolved: ax25: Remove broken autobind Binding AX25 socket by using the autobind feature leads to memory leaks in ax25connect and also refcount leaks in ax25release. Memory leak was detected with kmemleak:...

CVE-2025-22109

CVE-2025-22109 concerns the AX25 autobind feature in the Linux kernel. The linked debugging output shows memory leaks and refcount leaks in ax25_connect() and ax25_release() when autobind is used, caused by refcounts not being incremented as in ax25_bind()/ax25_setsockopt(SO_BINDTODEVICE). The fi...

CVE-2025-22077 Revert "smb: client: fix TCP timers deadlock after rmmod"

In the Linux kernel, the following vulnerability has been resolved: Revert "smb: client: fix TCP timers deadlock after rmmod" This reverts commit e9f2517a3e18a54a3943c098d2226b245d488801. Commit e9f2517a3e18 "smb: client: fix TCP timers deadlock after rmmod" is intended to fix a null-ptr-deref in...

CVE-2025-22062 sctp: add mutual exclusion in proc_sctp_do_udp_port()

In the Linux kernel, the following vulnerability has been resolved: sctp: add mutual exclusion in procsctpdoudpport We must serialize calls to sctpudpsockstop and sctpudpsockstart or risk a crash as syzbot reported: Oops: general protection fault, probably for non-canonical address...

CVE-2025-22062

CVE-2025-22062 is a Linux kernel vulnerability where mutual exclusion was missing in proc_sctp_do_udp_port(), risking a crash due to unsynchronized calls to sctp_udp_sock_stop() and sctp_udp_sock_start(). The issue is evidenced by syzbot exposé showing a crash/OOPS from a non-canonical address. T...

CVE-2025-22059 udp: Fix multiple wraparounds of sk->sk_rmem_alloc.

In the Linux kernel, the following vulnerability has been resolved: udp: Fix multiple wraparounds of sk-skrmemalloc. udpenqueuescheduleskb has the following condition: if atomicread&sk-skrmemalloc sk-skrcvbuf goto drop; sk-skrcvbuf is initialised by net.core.rmemdefault and later can be configure...

CVE-2025-22059 udp: Fix multiple wraparounds of sk->sk_rmem_alloc.

In the Linux kernel, the following vulnerability has been resolved: udp: Fix multiple wraparounds of sk-skrmemalloc. udpenqueuescheduleskb has the following condition: if atomicread&sk-skrmemalloc sk-skrcvbuf goto drop; sk-skrcvbuf is initialised by net.core.rmemdefault and later can be configure...

CVE-2025-22058 udp: Fix memory accounting leak.

In the Linux kernel, the following vulnerability has been resolved: udp: Fix memory accounting leak. Matt Dowling reported a weird UDP memory usage issue. Under normal operation, the UDP memory usage reported in /proc/net/sockstat remains close to zero. However, it occasionally spiked to 524,288...

UBUNTU-CVE-2025-22021

In the Linux kernel, the following vulnerability has been resolved: netfilter: socket: Lookup orig tuple for IPv6 SNAT nfsklookupslowv4 does the conntrack lookup for IPv4 packets to restore the original 5-tuple in case of SNAT, to be able to find the right socket if any. Then socketmatch can...

CVE-2025-22021

In the Linux kernel, the following vulnerability has been resolved: netfilter: socket: Lookup orig tuple for IPv6 SNAT nfsklookupslowv4 does the conntrack lookup for IPv4 packets to restore the original 5-tuple in case of SNAT, to be able to find the right socket if any. Then socketmatch can...