CVE-2024-53091 bpf: Add sk_is_inet and IS_ICSK check in tls_sw_has_ctx_tx/rx
A null pointer dereference in the Linux kernel TLS subsystem allows local attackers to cause a system crash via vsock or unix sockets.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-53091?
CVE-2024-53091 is a high-severity vulnerability in Linux kernel, published on 21 Nov 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
bpf: Add sk_is_inet and IS_ICSK check in tls_sw_has_ctx_tx/rx
As the introduction of the support for vsock and unix sockets in sockmap, tls_sw_has_ctx_tx/rx cannot presume the socket passed in must be IS_ICSK. vsock and af_unix sockets have vsock_sock and unix_sock instead of inet_connection_sock. For these sockets, tls_get_ctx may return an invalid pointer and cause page fault in function tls_sw_ctx_rx.
BUG: unable to handle page fault for address: 0000000000040030 Workqueue: vsock-loopback vsock_loopback_work RIP: 0010:sk_psock_strp_data_ready+0x23/0x60 Call Trace: ? __die+0x81/0xc3 ? no_context+0x194/0x350 ? do_page_fault+0x30/0x110 ? async_page_fault+0x3e/0x50 ? sk_psock_strp_data_ready+0x23/0x60 virtio_transport_recv_pkt+0x750/0x800 ? update_load_avg+0x7e/0x620 vsock_loopback_work+0xd0/0x100 process_one_work+0x1a7/0x360 worker_thread+0x30/0x390 ? create_worker+0x1a0/0x1a0 kthread+0x112/0x130 ? __kthread_cancel_work+0x40/0x40 ret_from_fork+0x1f/0x40
v2: - Add IS_ICSK check v3: - Update the commits in Fixes
Which versions are affected by CVE-2024-53091?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-53091?
Apply the vendor's patch.
Is CVE-2024-53091 being exploited?
There is no known exploitation of CVE-2024-53091 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-54616, AZL-54629, BELL-CVE-2024-53091, DEBIAN-CVE-2024-53091, GHSA-qccg-86w9-x648, ROOT-OS-DEBIAN-12-CVE-2024-53091 and 2 more.