Red Hat Security Advisory: kernel security, bug fix, and enhancement update

Important

A flaw was found in the Linux kernel's `eventpoll` component. In certain situations, the `ep_free()` function in `eventpoll.c` can prematurely free the `eventpoll` data structure while it is still being used by another concurrent thread. This use-after-free (UAF) vulnerability could allow a local attacker to cause a denial of service or potentially escalate privileges.

CWE-825 - Expired Pointer Dereference

A flaw was found in the Linux kernel's mana network driver. This vulnerability, a use-after-free, occurs when the PCI service rescan path attempts to destroy an already-freed workqueue a second time. A local attacker could exploit this condition to cause a system crash, leading to a denial of service.

CWE-1341 - Multiple Releases of Same Resource or Handle

A flaw was found in the Linux kernel's IPv6 In-situ Operations, Administration, and Maintenance (IOAM6) trace fill functionality. An integer overflow vulnerability exists in the `ioam6_fill_trace_data()` function, where the schema length calculation can wrap around due to being stored in an 8-bit unsigned integer. This bypasses buffer size checks, leading to a buffer overflow that can result in a denial of service or other memory corruption issues.

CWE-787 - Out-of-bounds Write