SB20260528134 - Improper resource shutdown or release in Linux kernel char tpm driver
Published: May 28, 2026
Security Bulletin ID
SB20260528134
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper resource shutdown or release (CVE-ID: CVE-2026-45941)
CWE-ID: CWE-404 - Improper Resource Shutdown or Release
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper resource shutdown or release in tpm_tis_i2c_send() when handling a get_burstcount() timeout failure. A local user can trigger a timeout condition to cause a denial of service.
The issue occurs because locality is not released if get_burstcount() returns -EBUSY.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/1a22048c1117cdfac185ba450aba67ed6b65dc87
- https://git.kernel.org/stable/c/1bb8f8826d0748b4b92a98fb6b6dfe52081739f5
- https://git.kernel.org/stable/c/2f7a665e1323359d99c74301d1e180f5e2c40181
- https://git.kernel.org/stable/c/8f124c5582d443ac9fb690db26d08cab5d6ba76e
- https://git.kernel.org/stable/c/948966e546f29af04391d98b8e378e4a7670c1c1
- https://git.kernel.org/stable/c/a61b8412e3eb8b71646dba867e8252d8560a1a27
- https://git.kernel.org/stable/c/bbd6e97c836cbeb9606d7b7e5dcf8a1d89525713
- https://git.kernel.org/stable/c/c24c9c4cab11858f22f309521ba7ea5b1e7385f2