SB2026081641 - Improper handling of exceptional conditions in Linux kernel tls
Published: August 16, 2026
Security Bulletin ID
SB2026081641
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper handling of exceptional conditions (CVE-ID: CVE-2026-72330)
CWE-ID: CWE-755 - Improper Handling of Exceptional Conditions
CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to improper handling of zero-length TLS application_data records in tls_sw_read_sock() when processing a specially crafted TLS record. A remote attacker can send a zero-length TLS application_data record to cause a denial of service.
Only the read_sock() path is affected.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/0867b0f2513ebc1c475af9898c97f4772a68d964
- https://git.kernel.org/stable/c/3be28e2c9cd0230cb51fd4967df095273afd3848
- https://git.kernel.org/stable/c/c6b440cf766a557b08d25f1b571b3d57d039686e
- https://git.kernel.org/stable/c/e8a4c9fc437b16aef38f86ce3275677e36924259
- https://git.kernel.org/stable/c/ebc295ce343600c2d60c1e1e0c5d192080217457