CVE-2026-72322

CVE-2026-72322 concerns a race in the Linux kernel IPv6 multicast code (MLD delayed work) that can cause a Use-After-Free during device teardown and MLD query processing. The root cause is a use of in6_dev_hold() to take a reference on inet6_dev while it may already be freed (RCU-protected memory...

CVE-2026-72323 ipv4: igmp: Fix potential UAF in igmp_gq_start_timer()

In the Linux kernel, the following vulnerability has been resolved: ipv4: igmp: Fix potential UAF in igmpgqstarttimer A race condition exists between device teardown inetdevdestroy and incoming IGMP query processing igmprcv, leading to a Use-After-Free in the IGMP timer callback. During device...

CVE-2026-72322 ipv6: mcast: Fix potential UAF in MLD delayed work

In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: Fix potential UAF in MLD delayed work A race condition exists between device teardown and incoming MLD query processing, leading to a Use-After-Free in the MLD delayed work. During device destruction, the primary...

CVE-2026-72323

CVE-2026-72323 — Linux kernel igmp UAF vulnerability : A race between device teardown (inetdev_destroy) and IGMP query processing (igmp_rcv) can cause a Use-After-Free in the IGMP timer callback when the timer is re-armed. The in_device memory is freed via RCU after its refcount reaches 0, but ig...

CVE-2026-72323 ipv4: igmp: Fix potential UAF in igmp_gq_start_timer()

In the Linux kernel, the following vulnerability has been resolved: ipv4: igmp: Fix potential UAF in igmpgqstarttimer A race condition exists between device teardown inetdevdestroy and incoming IGMP query processing igmprcv, leading to a Use-After-Free in the IGMP timer callback. During device...

CVE-2026-72321 ipv4: igmp: Fix potential memory leaks in igmp_mod_timer() and igmp_stop_timer()

In the Linux kernel, the following vulnerability has been resolved: ipv4: igmp: Fix potential memory leaks in igmpmodtimer and igmpstoptimer When a timer is deleted and not re-armed in igmpmodtimer, or stopped in igmpstoptimer, the code currently decrements the reference counter of the multicast...

CVE-2026-72321 ipv4: igmp: Fix potential memory leaks in igmp_mod_timer() and igmp_stop_timer()

In the Linux kernel, the following vulnerability has been resolved: ipv4: igmp: Fix potential memory leaks in igmpmodtimer and igmpstoptimer When a timer is deleted and not re-armed in igmpmodtimer, or stopped in igmpstoptimer, the code currently decrements the reference counter of the multicast...

EUVD-2026-59220

In the Linux kernel, the following vulnerability has been resolved: ipv4: igmp: Fix potential memory leaks in igmpmodtimer and igmpstoptimer When a timer is deleted and not re-armed in igmpmodtimer, or stopped in igmpstoptimer, the code currently decrements the reference counter of the multicast...

CVE-2026-72321

CVE-2026-72321 affects the Linux kernel’s IGMP timer handling (ipv4: igmp). The root cause is a memory leak when deleting or stopping timers in igmp_mod_timer() and igmp_stop_timer(): refcount_dec(&im->refcnt) can drop the group entry im to zero on an RC reader path, leaving the im object leak...

CVE-2026-72139

The CVE concerns a Linux kernel race where per-socket authentication data (md5sig/md5sig_key) could be freed before an RCU grace period elapses during tcp_connect. In the vulnerable path, two branches (needs_md5 and needs_ao) free the md5sig_info or its keys while a socket is in TCP_SYN_SENT, ris...

CVE-2026-72139 tcp: defer md5sig_info kfree past RCU grace period in tcp_connect

In the Linux kernel, the following vulnerability has been resolved: tcp: defer md5siginfo kfree past RCU grace period in tcpconnect The md5+ao reconciliation in tcpconnect net/ipv4/tcpoutput.c has two symmetric branches: if needsmd5 tcpaodestroysocksk, false; else if needsao tcpclearmd5listsk;...

CVE-2026-72139 tcp: defer md5sig_info kfree past RCU grace period in tcp_connect

In the Linux kernel, the following vulnerability has been resolved: tcp: defer md5siginfo kfree past RCU grace period in tcpconnect The md5+ao reconciliation in tcpconnect net/ipv4/tcpoutput.c has two symmetric branches: if needsmd5 tcpaodestroysocksk, false; else if needsao tcpclearmd5listsk;...

EUVD-2026-58897

In the Linux kernel, the following vulnerability has been resolved: tcp: defer md5siginfo kfree past RCU grace period in tcpconnect The md5+ao reconciliation in tcpconnect net/ipv4/tcpoutput.c has two symmetric branches: if needsmd5 tcpaodestroysocksk, false; else if needsao tcpclearmd5listsk;...

EUVD-2026-58884

In the Linux kernel, the following vulnerability has been resolved: can: isotp: use unconditional synchronizercu in isotprelease isotpnotify unregisters the RCU CAN filters via canrxunregister and clears so-bound without waiting for a grace period. isotprelease uses so-bound to decide whether it...

CVE-2026-72126 can: isotp: use unconditional synchronize_rcu() in isotp_release()

In the Linux kernel, the following vulnerability has been resolved: can: isotp: use unconditional synchronizercu in isotprelease isotpnotify unregisters the RCU CAN filters via canrxunregister and clears so-bound without waiting for a grace period. isotprelease uses so-bound to decide whether it...

CVE-2026-72126

The CVE concerns a Linux kernel race in the isotp path of CAN networking. The fix makes isotp_release() always call synchronize_rcu() before cancelling RX timers, regardless of so->bound, addressing a scenario where NETDEV_UNREGISTER could allow a use-after-free of a timer callback if an in-fl...

CVE-2026-72126 can: isotp: use unconditional synchronize_rcu() in isotp_release()

In the Linux kernel, the following vulnerability has been resolved: can: isotp: use unconditional synchronizercu in isotprelease isotpnotify unregisters the RCU CAN filters via canrxunregister and clears so-bound without waiting for a grace period. isotprelease uses so-bound to decide whether it...

EUVD-2026-58881

In the Linux kernel, the following vulnerability has been resolved: can: bcm: defer rxop deallocation to workqueue to fix thrtimer UAF Commit f1b4e32aca08 "can: bcm: use callrcu instead of costly synchronizercu" replaced synchronizercu in bcmdeleterxop with callrcu and introduced the RXNOAUTOTIME...

CVE-2026-72123 can: bcm: defer rx_op deallocation to workqueue to fix thrtimer UAF

In the Linux kernel, the following vulnerability has been resolved: can: bcm: defer rxop deallocation to workqueue to fix thrtimer UAF Commit f1b4e32aca08 "can: bcm: use callrcu instead of costly synchronizercu" replaced synchronizercu in bcmdeleterxop with callrcu and introduced the RXNOAUTOTIME...

CVE-2026-72123

CVE-2026-72123 concerns Linux kernel CAN BCM RX teardown where a race between a concurrent RCU reader and a deferred thrtimer could dereference a freed op, causing a use-after-free. Root cause: after replacing synchronize_rcu() with call_rcu() and introducing RX_NO_AUTOTIMER, the thrtimer path in...