CVE-2026-72299

Status: UPDATED  |  Advisory ID: CVE-2026-72299

Key Details

Affected Products, Subsystems & Sectors

What to Know

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

tipc: restrict socket queue dumps in enqueue tracepoints

tipc_sk_enqueue() runs with sk->sk_lock.slock held while the socket is

owned by user context. The spinlock protects the backlog queue in this

path, but it does not serialize against the socket owner consuming or

purging sk_receive_queue.

KASAN reported:

CPU: 14 UID: 0 PID: 1050 Comm: tipc3 Not tainted 7.1.0-rc6+ #126 PREEMPT(lazy)

Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014

Call Trace:

<TASK>

dump_stack_lvl+0x76/0xa0 lib/dump_stack.c:123

print_report+0xce/0x5b0 mm/kasan/report.c:482

kasan_report+0xc6/0x100 mm/kasan/report.c:597

__asan_report_load4_noabort+0x14/0x30 mm/kasan/report_generic.c:380

tipc_skb_dump+0x1327/0x16f0 net/tipc/trace.c:73

tipc_list_dump+0x208/0x2e0 net/tipc/trace.c:187

tipc_sk_dump+0xaf6/0xd60 net/tipc/socket.c:3996

trace_event_raw_event_tipc_sk_class+0x312/0x5a0 net/tipc/trace.h:188

tipc_sk_rcv+0xb1d/0x1d50 net/tipc/socket.c:2497

tipc_node_xmit+0x1c3/0x1440 net/tipc/node.c:1689

__tipc_sendmsg+0x97a/0x1440 net/tipc/socket.c:1512

tipc_sendmsg+0x52/0x80 net/tipc/socket.c:1400

sock_sendmsg+0x2f6/0x3e0 net/socket.c:825

splice_to_socket+0x7f9/0x1010 fs/splice.c:884

do_splice+0xe21/0x2330 fs/splice.c:936

__do_splice+0x153/0x260 fs/splice.c:1431

__x64_sys_splice+0x150/0x230 fs/splice.c:1616

x64_sys_call+0xeb5/0x2790 arch/x86/entry/syscall_64.c:41

do_syscall_64+0xf3/0x620 arch/x86/entry/syscall_64.c:63

entry_SYSCALL_64_after_hwframe+0x76/0x7e arch/x86/entry/entry_64.S:130

RIP: 0033:0x71624e8aafe2

Code: 08 0f 85 71 3a ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 <c3> 66 2e 0f 1f 84 00 00 00 00 00 66 2e 0f 1f 84 00 00 00 00 00 66

RSP: 002b:0000716157ffed68 EFLAGS: 00000246 ORIG_RAX: 0000000000000113

RAX: ffffffffffffffda RBX: 0000716157fff6c0 RCX: 000071624e8aafe2

RDX: 000000000000005f RSI: 0000000000000000 RDI: 0000000000000066

RBP: 0000716157ffed90 R08: 0000000000008000 R09: 0000000000000001

R10: 0000000000000000 R11: 0000000000000246 R12: ffffffffffffff00

R13: 0000000000000021 R14: 0000000000000000 R15: 00007fff89799c40

</TASK>

The TIPC_DUMP_ALL tracepoints in tipc_sk_enqueue() also dump

sk_receive_queue and can therefore dereference skbs that the socket

owner has already dequeued or freed. Restrict these dumps to

TIPC_DUMP_SK_BKLGQ, which matches the queue protected by the held

spinlock.

Keep the change limited to the enqueue path, where the unsafe queue dump

is reachable while the socket is owned by user context. (NVD)

What to Do

Monitor Linux's web page for any future patch releases.

References