A vulnerability in the Linux kernel TPM driver st33zp24 was fixed to address a missing cleanup on error in the get_burstcount() function. (CVE-2026-45871)
A vulnerability in the Linux kernel TPM driver st33zp24 was fixed to address a missing cleanup on error in the get_burstcount() function. If get_burstcount() returns a timeout error (-EBUSY), the function st33zp24_send() previously returned without releasing a previously acquired locality, potentially causing resource locking issues. The fix ensures proper cleanup by using a goto statement to handle errors correctly.
AI Analysis
Technical Summary
The Linux kernel TPM driver st33zp24 had a flaw where get_burstcount() could return -EBUSY on timeout, and st33zp24_send() would return immediately without releasing the locality it had acquired. This could lead to resource locking or denial of service conditions. The vulnerability was resolved by adding a goto out_err path to guarantee cleanup on failure of get_burstcount().
Potential Impact
This vulnerability does not affect confidentiality or integrity but impacts availability by potentially causing a denial of service through resource locking in the TPM driver. There are no known exploits in the wild. The severity is moderate due to the availability impact and limited scope.
Mitigation Recommendations
A fix has been implemented in the Linux kernel to ensure proper cleanup on get_burstcount() errors in the st33zp24 TPM driver. Users should apply the official Linux kernel updates that include this patch. No additional mitigation is required beyond applying the vendor's fix.
A vulnerability in the Linux kernel TPM driver st33zp24 was fixed to address a missing cleanup on error in the get_burstcount() function. (CVE-2026-45871)
Description
A vulnerability in the Linux kernel TPM driver st33zp24 was fixed to address a missing cleanup on error in the get_burstcount() function. If get_burstcount() returns a timeout error (-EBUSY), the function st33zp24_send() previously returned without releasing a previously acquired locality, potentially causing resource locking issues. The fix ensures proper cleanup by using a goto statement to handle errors correctly.
CVSS v3.1
Score 5.5medium
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Linux kernel TPM driver st33zp24 had a flaw where get_burstcount() could return -EBUSY on timeout, and st33zp24_send() would return immediately without releasing the locality it had acquired. This could lead to resource locking or denial of service conditions. The vulnerability was resolved by adding a goto out_err path to guarantee cleanup on failure of get_burstcount().
Potential Impact
This vulnerability does not affect confidentiality or integrity but impacts availability by potentially causing a denial of service through resource locking in the TPM driver. There are no known exploits in the wild. The severity is moderate due to the availability impact and limited scope.
Mitigation Recommendations
A fix has been implemented in the Linux kernel to ensure proper cleanup on get_burstcount() errors in the st33zp24 TPM driver. Users should apply the official Linux kernel updates that include this patch. No additional mitigation is required beyond applying the vendor's fix.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-x542-jg8f-r599
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-45871"]
- Ecosystems
- []
- Database Specific Severity
- MODERATE
- Cvss Version
- 3.1
Threat ID: 6a3ef7ef27e9c79719034b86
Added to database: 06/26/2026, 22:06:39 UTC
Last enriched: 06/26/2026, 22:50:00 UTC
Last updated: 07/31/2026, 19:24:48 UTC
Views: 11
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