High severity · published Jun 25, 2026
CVE-2026-53149
thunderbolt: Bound root directory content to block size
7.1
CVSS
0.1%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 2% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
4.15 before 5.10.259; 5.11 before 5.15.210; 5.16 before 6.1.176; 6.2 before 6.6.143; 6.7 before 6.12.94; 6.13 before 6.18.36; +8 more · source: NVD
LI
Linux · Linux
cdae7c07e3e3509eaabc18c1640a55dc5b99c179 before 5c7657d38d07268124782f03519f07c22a5814fb; cdae7c07e3e3509eaabc18c1640a55dc5b99c179 before b212bc161d8a9937b42153723a4a3f2f74fab528; cdae7c07e3e3509eaabc18c1640a55dc5b99c179 before 1912be23daf4afc8d24ce916021ab68ca4c679db; cdae7c07e3e3509eaabc18c1640a55dc5b99c179 before 4d0b1524caadb04c10a71f3f88692c63dcb39115; cdae7c07e3e3509eaabc18c1640a55dc5b99c179 before 0a32040a48db8cf35de48b85d6115df5623e4964; cdae7c07e3e3509eaabc18c1640a55dc5b99c179 before 60ba6217460792356a238299edd675d91d46bab4; +3 more · source: vendor
SS
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem · Siemens
0 · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-53149
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-53149
Patch
https://git.kernel.org/stable/c/0a32040a48db8cf35de48b85d6115df5623e4964
Patch
https://git.kernel.org/stable/c/1912be23daf4afc8d24ce916021ab68ca4c679db
Patch
https://git.kernel.org/stable/c/4d0b1524caadb04c10a71f3f88692c63dcb39115
Patch
https://git.kernel.org/stable/c/5c7657d38d07268124782f03519f07c22a5814fb
Patch
https://git.kernel.org/stable/c/60ba6217460792356a238299edd675d91d46bab4
Patch
https://git.kernel.org/stable/c/65423079c7420e3dbf9a7aa345c243a3f5752e5d
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