A vulnerability in the Linux kernel's RDS (Reliable Datagram Sockets) networking subsystem involves incorrect sizing of a connection's path set based on the transport used. This mismatch occurs because the number of paths is computed before the transport is finalized, leading to resource leaks during connection teardown. The issue has been fixed by recomputing the number of paths after the transport is finalized to ensure consistent creation and destruction of connection paths.
CVE-2026-98537 is a vulnerability in the Linux kernel's workqueue subsystem where a NULL pointer dereference can occur in the flush dependency check. This happens because the code dereferences worker->current_pwq without verifying it is non-NULL, which can occur when a kworker is not executing a work item. The issue has been fixed by adding a guard to check worker->current_pwq before dereferencing it.
A vulnerability in the Linux kernel's drm/nouveau component caused a gem reference leak in the validate_init() function. The issue occurs when certain error paths break loops without releasing references, leading to resource leaks. This flaw has been fixed in Linux kernel version 4.18 and later.
A NULL pointer dereference vulnerability exists in the Linux kernel's drm/virtio driver due to lack of proper error checking on fence allocation failure. Specifically, virtio_gpu_fence_alloc() can return NULL under memory pressure, but the caller virtio_gpu_init_submit() does not check this, leading to a NULL pointer dereference in virtio_gpu_fence_event_create(). This flaw was discovered via fuzzing with Syzkaller and can cause a kernel crash (general protection fault).
CVE-2026-98503 is a vulnerability in the Linux kernel's packet subsystem involving the handling of TX_RING packets. The issue arises from premature release of ring slots due to skb destructor calls, which could lead to reuse of slots still linked to socket buffers. The fix involves switching to standard zerocopy completion to ensure slots are only released after all references are freed or copied, preventing in-flight state aliasing and improving memory management.
A reference leak vulnerability in the Linux kernel's mlx5 driver was fixed. The flaw involved a reference count not being properly dropped when a reverse entry's counter was already being released, potentially causing the reverse entry to remain alive indefinitely. This issue was resolved by ensuring the reference is dropped to prevent the leak.
A null pointer dereference vulnerability was identified and fixed in the Linux kernel's KVM arm64 nested virtualization code. The flaw occurs due to a race condition during concurrent stage 2 teardown of a nested guest, which can cause a pointer to be set to NULL and subsequently dereferenced. The issue was resolved by adding a check to ensure the pointer is non-NULL before use.
In the Linux kernel, the following vulnerability has been resolved:
wifi: mac80211: limit injected antenna index in ieee80211_parse_tx_radiotap
When parsing the radiotap header of an injected frame,
ieee80211_parse_tx_radiotap() uses the IEEE80211_RADIOTAP_ANTENNA value
directly as a shift count:
info->control.antennas |= BIT(*iterator.this_arg);
*iterator.this_arg is an 8-bit value taken straight from the frame
supplied by userspace, so BIT() can be asked to shift by up to 255. That
is undefined behaviour on the unsigned long and is reported by UBSAN:
UBSAN: shift-out-of-bounds in net/mac80211/tx.c:2174:30
shift exponent 235 is too large for 64-bit type 'unsigned long'
Call Trace:
ieee80211_parse_tx_radiotap+0xadb/0x1950 net/mac80211/tx.c:2174
ieee80211_monitor_start_xmit+0xb1f/0x1250 net/mac80211/tx.c:2451
...
packet_sendmsg+0x3eb6/0x50f0 net/packet/af_packet.c:3109
info->control.antennas is a 2-bit bitmap (u8 antennas:2), so only antenna
indices 0 and 1 can ever be represented. Ignore any larger value instead
of shifting out of bounds.