CVE-2026-49424 Kernel stack disclosure in Linux compatibility layer

The Linux waitid implementation translates a FreeBSD siginfot struct into a stack-declared Linux siginfot. It did not first zero the stack struct. An unprivileged user may observe 104 bytes of uninitialized kernel stack data, which may contain sensitive information...

CVE-2026-72400

A flaw was found in the Linux kernel's Segment Routing over IPv6 SEG6 component. Insufficient validation of the Segment Routing Header SRH length before reading its fixed fields can lead to an out-of-bounds read. A local attacker, by crafting a malicious BPF Berkeley Packet Filter program, could...

CVE-2026-49423 Remote DOS via uninitialized memory access in KTLS receive

When building the iovec array for a received TLS 1.2 CBC record, ktlsocftlscbcdecrypt incremented the iovec index for every mbuf in the chain, including mbufs that were skipped because they contained only TLS header bytes. This left uninitialized entries in the iovec array. The iovec array was...

CVE-2026-72380

A flaw was found in the Linux kernel's xen/pvcalls component. A malicious or buggy backend could send a specially crafted request identifier that, when processed, would lead to an out-of-bounds write. This could result in memory corruption and potentially cause the frontend to stop trusting the...

CVE-2026-72374

A flaw was found in the Linux kernel's AFS filesystem client. The AFS client uses an rxrpc server for callback notifications. Its message parsers incorrectly convert the -EAGAIN return value to 0 when the last packet has not been fully received but all currently queued data is consumed. This...

CVE-2026-72459

A flaw was found in the AppArmor security module of the Linux kernel. The aalabelalloc function, responsible for allocating security labels, did not properly free all allocated resources in its error handling path. This oversight could lead to a memory leak, potentially impacting system stability...

CVE-2026-72372

A flaw was found in the AFS Andrew File System component of the Linux kernel. This vulnerability arises from insufficient locking mechanisms when modifying internal data structures related to dynamic inode management. An attacker could potentially exploit this weakness, leading to system...

CVE-2026-49428

Certain system calls, such open2 with the OTRUNC flag set, and fspacectl2, could incorrectly free memory in largepage objects. These operations are not permitted on largepage objects, but the implementation did not verify this. An unprivileged local user can abuse the bug to access freed kernel...

CVE-2026-49421

The kernel function that implements unlinkat2 and funlinkat2 validated the ATRESOLVEBENEATH flag but failed to pass it through to the underlying path lookup. The flag was silently dropped, so path resolution was not actually restricted. A process that uses ATRESOLVEBENEATH with unlinkat2 or...

CVE-2026-49428

In FreeBSD's posixshm module, open(2) with O_TRUNC and fspacectl(2) failed to verify whether operations are permitted on largepage objects, incorrectly freeing kernel memory. An unprivileged local user can read freed kernel memory and escalate privileges. Affected: all supported versions prior to...

CVE-2026-49427

CVE-2026-49427 is a use-after-free vulnerability in FreeBSD's POSIX largepage shared memory objects (posixshm module). Pages in largepage objects were not explicitly wired, so when sendfile(2) transmitted such an object with the SF_NOCACHE flag, it freed underlying pages while existing mappings s...

CVE-2026-49422 Use-after-free in TCP RACK stack option handler

The RACK setsockopt2 handler drops the connection lock in order to copy option data from userspace, then reacquires the lock. After reacquiring, it verifies that the TCP stack had not been switched away, but did not reload its pointer to the stack's per-connection control block. If userspace...

CVE-2026-49422 Use-after-free in TCP RACK stack option handler

The RACK setsockopt2 handler drops the connection lock in order to copy option data from userspace, then reacquires the lock. After reacquiring, it verifies that the TCP stack had not been switched away, but did not reload its pointer to the stack's per-connection control block. If userspace...

CVE-2026-49421 unlinkat(2) ignores AT_RESOLVE_BENEATH flag

The kernel function that implements unlinkat2 and funlinkat2 validated the ATRESOLVEBENEATH flag but failed to pass it through to the underlying path lookup. The flag was silently dropped, so path resolution was not actually restricted. A process that uses ATRESOLVEBENEATH with unlinkat2 or...

CVE-2026-49421

CVE-2026-49421 affects the FreeBSD kernel in all supported versions. The kernel function implementing unlinkat(2) and funlinkat(2) validated the AT_RESOLVE_BENEATH flag but failed to pass it to the underlying path lookup, silently dropping it. As a result, path resolution is not actually confined...

CVE-2026-49418

When msyncMSINVALIDATE is called on a mapping of an unmanaged device object, the physical pages in the mapping range are marked invalid but remain in the pager's page list. A subsequent page fault will cause the fault handler to re-insert the page into the object's list. This corrupts the list, a...

CVE-2026-72326

A flaw was found in the Linux kernel's CAKE Common Applications Kept Enhanced packet scheduler. This vulnerability arises from the incorrect handling of signed overhead values, which can lead to an integer underflow during packet length calculations. A negative effective length can then wrap to a...

CVE-2026-72321

A flaw was found in the Linux kernel's IPv4 Internet Group Management Protocol IGMP component. Incorrect handling of reference counts in the igmpmodtimer and igmpstoptimer functions can occur when a multicast list entry is concurrently removed. This can lead to a memory leak of the im structure,...

CVE-2026-72316

A flaw was found in the Linux kernel's device mapper dm era target. When the metadataopen function fails to allocate memory, it returns a NULL pointer. The calling function, eractr, does not correctly validate this return, leading to a NULL pointer dereference when the metadata is accessed. This...

CVE-2026-72315

A flaw was found in the Linux kernel's SMB client cifs. This issue occurs due to a delayed release of dentry reference counts during direct I/O DIO operations. When a file system is unmounted while these operations are still pending, it can lead to a "busy dentry" warning. This prevents the...