Red Hat Security Advisory: kernel security and bug fix update

Important

A flaw was found in the smb client in the Linux kernel. A potential out-of-bounds error was seen in the smb2_parse_contexts() function. Validate offsets and lengths before dereferencing create contexts in smb2_parse_contexts().

A use-after-free flaw was found in the netfilter subsystem of the Linux kernel. If the catchall element is garbage-collected when the pipapo set is removed, the element can be deactivated twice. This can cause a use-after-free issue on an NFT_CHAIN object or NFT_OBJECT object, allowing a local unprivileged user with CAP_NET_ADMIN capability to escalate their privileges on the system.

CWE-416 - Use After Free

A flaw was found in the Linux kernel pertaining to a potential use-after-free (UAF) scenario in a system involving Logical Partitioning Interrupts (LPI) translation cache operations. Specifically, the issue arises when a cache hit occurs concurrently with an operation that invalidates the cache, such as a DISCARD ITS command. The root cause is traced to vgic_its_check_cache() not appropriately managing the reference count of the vgic_irq object. Upon returning from this function, the reference count of vgic_irq is not incremented. This issue can lead to the object being prematurely freed while still in use by other parts of the system, potentially resulting in undefined behavior or system instability.

CWE-416 - Use After Free