SB2026080746 - Insufficient Control Flow Management in Linux kernel x86 lib
Published: August 7, 2026
Security Bulletin ID
SB2026080746
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Insufficient Control Flow Management (CVE-ID: CVE-2026-68480)
CWE-ID: CWE-691 - Insufficient Control Flow Management
CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to disclose sensitive information.
The vulnerability exists due to improper control flow handling in the x86 Safe-RET sequence when interrupts are injected during execution of the sequence on SRSO-affected systems. A local user can inject interrupts during the Safe-RET sequence to disclose sensitive information.
Only systems affected by SRSO are vulnerable.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/52db77a13be224e09eb4ba6b4252ae8ab9085c2c
- https://git.kernel.org/stable/c/61649a2d61cb0dbc673f0f232f0f0c298bf50442
- https://git.kernel.org/stable/c/6703dba1d14cbd6647cd1ccfa3a3fa94b64dd096
- https://git.kernel.org/stable/c/bfe7f9993467ba431b2731437949ac1e2634e771
- https://git.kernel.org/stable/c/d0208e08d64d99383e09852a76cc3038c5a4c3ab
- https://git.kernel.org/stable/c/dfefa3c51370f84acb643cddf98bb42c885d0483
- https://git.kernel.org/stable/c/e262f28a69ae9e0791248f93b0173c1d1f3e1d5d