CVE-2026-45998

HIGH

MEDIUM Priority: 0.01 BB Relevance: 41/100

Published: 2026-05-27 Modified: 2026-11-06 First seen: 2026-11-06 Status: active

Attack Surface

Low Complexity No Interaction Conf. Impact Integ. Impact

CVSS Vector Breakdown

AV: Local

AC: Low

PR: Low

UI: None

S: Unchanged

C: High

I: High

A: High

Description

In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix potential UAF after skb_unshare() failure If skb_unshare() fails to unshare a packet due to allocation failure in rxrpc_input_packet(), the skb pointer in the parent (rxrpc_io_thread()) will be NULL'd out. This will likely cause the call to trace_rxrpc_rx_done() to oops. Fix this by moving the unsharing down to where rxrpc_input_call_event() calls rxrpc_input_call_packet(). There are a number of places prior to that where we ignore DATA packets for a variety of reasons (such as the call already being complete) for which an unshare is then avoided. And with that, rxrpc_input_packet() doesn't need to take a pointer to the pointer to the packet, so change that to just a pointer.

Weakness Classification (2)

CWE-416 CWE-825

Affected Software (7)

Vendor	Product	Version
Linux	Linux	2d1faf7a0ca3c0b327cf064c80e4e775532c9319 < e3bf143b1e98fb3d6d9e6825bcd683974d478e8c
Linux	Linux	2d1faf7a0ca3c0b327cf064c80e4e775532c9319 < bf20f46d94f1db38e6ffc0ca204a5fe0de01b495
Linux	Linux	2d1faf7a0ca3c0b327cf064c80e4e775532c9319 < 996b0487b3cdda4c91811dbb1c9564626bc840bd
Linux	Linux	2d1faf7a0ca3c0b327cf064c80e4e775532c9319 < 8fde6296c4d4da2be7ab761305ab7f232b94eefd
Linux	Linux	2d1faf7a0ca3c0b327cf064c80e4e775532c9319 < 1f2740150f904bfa60e4bad74d65add3ccb5e7f8
Linux	Linux	6.2
linux	linux_kernel	6.2 – 6.6.140