What’s Vulnerable › Vulnerabilities

CVE-2025-37817: mcb: fix a double free bug in chameleon_parse_gdd()

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-05-08 · updated 2026-06-17
• Weakness: CWE-415

Description

In the Linux kernel, the following vulnerability has been resolved: mcb: fix a double free bug in chameleon_parse_gdd() In chameleon_parse_gdd(), if mcb_device_register() fails, 'mdev' would be released in mcb_device_register() via put_device(). Thus, goto 'err' label and free 'mdev' again causes a double free. Just return if mcb_device_register() fails.

Affected products

• Debian Linux: 11.0
• Linux kernel: from 3.15 before 5.4.293; from 5.5 before 5.10.237; from 5.11 before 5.15.181; from 5.16 before 6.1.136; from 6.2 before 6.6.89; from 6.7 before 6.12.26 — fixed in 5.10.237, 5.15.181, 5.4.293, 6.1.136, 6.12.26, 6.14.5

How to fix

Upgrade to a fixed version: Linux kernel 5.10.237, 5.15.181, 5.4.293, 6.1.136. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/4ffe8c9fb561e4427dd1a3056cd5b3685b74f78d
• https://git.kernel.org/stable/c/59f993cd36b6e28a394ba3d977e8ffe5c9884e3b
• https://git.kernel.org/stable/c/7c7f1bfdb2249f854a736d9b79778c7e5a29a150
• https://git.kernel.org/stable/c/96838eb1836fd372e42be5db84f0b333b65146a6
• https://git.kernel.org/stable/c/bcc7d58ee5173e34306026bd01e1fbf75e169d37
• https://git.kernel.org/stable/c/c5b8a549ef1fcc6066b037a3962c79d60465ba0b
• https://git.kernel.org/stable/c/d70184958b0ea8c0fd52e2b456654b503e769fc8
• https://git.kernel.org/stable/c/df1a5d5c6134224f9298e5189230f9d29ae50cac
• https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
• https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html

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