CVE-2026-53149
Published: June 27, 2026Last modified: July 6, 2026
Description
In the Linux kernel, the following vulnerability has been resolved: thunderbolt: Bound root directory content to block size __tb_property_parse_dir() does not check that content_offset + content_len fits within block_len for the root directory case. When rootdir->length equals or exceeds block_len - 2, the entry loop reads past the allocated property block. Add a bounds check after computing content_offset and content_len to reject directories whose content extends past the block.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.1 |
| Attack Vector | LOCAL |
| Attack complexity | LOW |
| Privileges required | LOW |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | HIGH |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Fixed (6.1.177-r0) |
| 25 LTS | linux-lts | Fixed (6.12.95-r0) | |
| Stream | linux-lts | Fixed (6.18.38-r0) |
References
- https://git.kernel.org/stable/c/0a32040a48db8cf35de48b85d6115df5623e4964
- https://git.kernel.org/stable/c/1912be23daf4afc8d24ce916021ab68ca4c679db
- https://git.kernel.org/stable/c/4d0b1524caadb04c10a71f3f88692c63dcb39115
- https://git.kernel.org/stable/c/5c7657d38d07268124782f03519f07c22a5814fb
- https://git.kernel.org/stable/c/60ba6217460792356a238299edd675d91d46bab4
- https://git.kernel.org/stable/c/65423079c7420e3dbf9a7aa345c243a3f5752e5d
- https://git.kernel.org/stable/c/b212bc161d8a9937b42153723a4a3f2f74fab528
- https://git.kernel.org/stable/c/cbeb68cbaa0a6f979ef428a7f2d0268c082ba166