CVE-2024-26862

Technical Description

In the Linux kernel, the following vulnerability has been resolved:

packet: annotate data-races around ignore_outgoing

ignore_outgoing is read locklessly from dev_queue_xmit_nit()

and packet_getsockopt()

Add appropriate READ_ONCE()/WRITE_ONCE() annotations.

syzbot reported:

BUG: KCSAN: data-race in dev_queue_xmit_nit / packet_setsockopt

write to 0xffff888107804542 of 1 bytes by task 22618 on cpu 0:

packet_setsockopt+0xd83/0xfd0 net/packet/af_packet.c:4003

do_sock_setsockopt net/socket.c:2311 [inline]

__sys_setsockopt+0x1d8/0x250 net/socket.c:2334

__do_sys_setsockopt net/socket.c:2343 [inline]

__se_sys_setsockopt net/socket.c:2340 [inline]

__x64_sys_setsockopt+0x66/0x80 net/socket.c:2340

do_syscall_64+0xd3/0x1d0

entry_SYSCALL_64_after_hwframe+0x6d/0x75

read to 0xffff888107804542 of 1 bytes by task 27 on cpu 1:

dev_queue_xmit_nit+0x82/0x620 net/core/dev.c:2248

xmit_one net/core/dev.c:3527 [inline]

dev_hard_start_xmit+0xcc/0x3f0 net/core/dev.c:3547

__dev_queue_xmit+0xf2

Remediation

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected Products

References