SB2026050238 - Always-Incorrect Control Flow Implementation in Linux kernel crypto
Published: May 2, 2026
Security Bulletin ID
SB2026050238
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) Always-Incorrect Control Flow Implementation (CVE-ID: CVE-2026-43033)
CWE-ID: CWE-670 - Always-Incorrect Control Flow Implementation
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 handling of high-order sequence bits in authencesn when decrypting data out of place. A local user can trigger out-of-place decryption with a specially crafted data layout to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/153d5520c3f9fd62e71c7e7f9e34b59cf411e555
- https://git.kernel.org/stable/c/5466e7d0cd9e4f9cef9d8f18f18b60e7bc1c77e5
- https://git.kernel.org/stable/c/89fe118b6470119b20c04afc36e45b81a69ea11f
- https://git.kernel.org/stable/c/8c62f618576519dbed6816fafc623ce592953025
- https://git.kernel.org/stable/c/cded4002d22177e8deaca1f257ecd932c9582b6b
- https://git.kernel.org/stable/c/d0c4ff6812386880f30bc64c2921299cc4d7b47f
- https://git.kernel.org/stable/c/d589abd8b019b07075fda255ceab8c8e950cdb3f
- https://git.kernel.org/stable/c/e02494114ebf7c8b42777c6cd6982f113bfdbec7