VulnerabilityPublished 25 Jun 2026Updated 6 Nov 2026

CVE-2026-53149: Linux kernel · thunderbolt: Bound root directory content to block size

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in cbeb68cbaa0a6f979ef428a7f2d0268c082ba166 : update Linux kernel when convenient.

Data as of 6 Nov 2026, 16:49 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Exploitation: No evidence of active exploitation and no public proof of concept
Automatable: Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact: Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-06.

Patch

Available – fixed in cbeb68cbaa0a6f979ef428a7f2d0268c082ba166, b212bc161d8a9937b42153723a4a3f2f74fab528, 65423079c7420e3dbf9a7aa345c243a3f5752e5d +5

Exploitation evidence

Disclosed: evidence found.
CVE published 25 Jun 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 6 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ cdae7c07e3e3509eaabc18c1640a55dc5b99c179, < cbeb68cbaa0a6f979ef428a7f2d0268c082ba166	Fixed in cbeb68cbaa0a6f979ef428a7f2d0268c082ba166
LinuxLinux	Affected ≥ cdae7c07e3e3509eaabc18c1640a55dc5b99c179, < b212bc161d8a9937b42153723a4a3f2f74fab528	Fixed in b212bc161d8a9937b42153723a4a3f2f74fab528
LinuxLinux	Affected ≥ cdae7c07e3e3509eaabc18c1640a55dc5b99c179, < 65423079c7420e3dbf9a7aa345c243a3f5752e5d	Fixed in 65423079c7420e3dbf9a7aa345c243a3f5752e5d
LinuxLinux	Affected ≥ cdae7c07e3e3509eaabc18c1640a55dc5b99c179, < 1912be23daf4afc8d24ce916021ab68ca4c679db	Fixed in 1912be23daf4afc8d24ce916021ab68ca4c679db
LinuxLinux	Affected ≥ cdae7c07e3e3509eaabc18c1640a55dc5b99c179, < 60ba6217460792356a238299edd675d91d46bab4	Fixed in 60ba6217460792356a238299edd675d91d46bab4
LinuxLinux	Affected ≥ cdae7c07e3e3509eaabc18c1640a55dc5b99c179, < 5c7657d38d07268124782f03519f07c22a5814fb	Fixed in 5c7657d38d07268124782f03519f07c22a5814fb

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.

References

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