CVE-2026-53150

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.

Score

CVSS 3.1 5.5 Medium

Status

Modified - 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2026-06-25

Last modified

2026-10-15

Weaknesses

CWE-191

Affected products

• Linux Kernel (Linux)
• Simatic S7-1500 Tm Mfp - Gnulinux Subsystem (Siemens)

References

• https://git.kernel.org/stable/c/581c2053ab4dbe27e83c9e62deb4c73aa8dc0c3a
• https://git.kernel.org/stable/c/35d6c9252a152e756768a26dbf216b9dd9dd8e92
• https://git.kernel.org/stable/c/99d9dbad1463afb510d42c9714f846361d1b726d
• https://git.kernel.org/stable/c/5f56bc6bddffe8710ba0ba8844023b5a44ca90e4
• https://git.kernel.org/stable/c/ca11e7da4fba4b394f69e16448f4463c44c84de6
• https://git.kernel.org/stable/c/2e0ddac549ebd713eb9f4a15b6496e3440a17d8b
• https://git.kernel.org/stable/c/3b6e68cb97f725385010264a873e14a3921b6b8a
• https://git.kernel.org/stable/c/cff8eb65d1eafe7793e54b4d0cf6bf831644630b
• https://cert-portal.siemens.com/productcert/html/ssa-784472.html