CVE-2024-53091

/// Technical 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

? __kt

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. 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.

/// References