SB2026091920 - Use-after-free in Linux kernel core
Published: September 19, 2026
Security Bulletin ID
SB2026091920
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-90198)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a local user to trigger a use-after-free.
The vulnerability exists due to a use-after-free in snd_card_do_free() when a managed sound card is unbound while an application retains an open file descriptor. A local user can close the open file descriptor while the managed sound card is being unbound to trigger a use-after-free.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/03c5dabc8f16bc212a5b26d2425c03a55e55a86d
- https://git.kernel.org/stable/c/09b27dd01b98480334c10bf6fb8d41d5fb063a4b
- https://git.kernel.org/stable/c/5ae1a690c522fea2900ff56c8c2ace7b059f5e04
- https://git.kernel.org/stable/c/6da22efb5cf490b06ffbca32b10fc8af7654fee0
- https://git.kernel.org/stable/c/7d9b5e86775fa97a487da08b9aa76e1674bf8868
- https://git.kernel.org/stable/c/a561012868ae37c28f61fdf658bf6f251bc0e8e8
- https://git.kernel.org/stable/c/d3d67f680dbc23a5e5e3d3ecfdbf700465809877