CVE-2026-53150 thunderbolt: Reject zero-length property entries in validator
A zero-length property entry in the Linux kernel Thunderbolt driver causes an integer underflow leading to a buffer underflow write, potentially allowing code execution or privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-53150?
CVE-2026-53150 is a medium-severity vulnerability in Linux kernel, published on 25 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-191
Which versions are affected by CVE-2026-53150?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-53150?
Apply the vendor's patch.
Is CVE-2026-53150 being exploited?
There is no known exploitation of CVE-2026-53150 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-90615, BELL-CVE-2026-53150, DEBIAN-CVE-2026-53150, GHSA-pwh4-8crg-2xvf, ROOT-OS-DEBIAN-11-CVE-2026-53150, ROOT-OS-DEBIAN-12-CVE-2026-53150 and 3 more.