SB2026081552 - Heap-based buffer overflow in Linux kernel crypto ccp driver

Description

This security bulletin contains information about 1 vulnerability.

1) Heap-based buffer overflow (CVE-ID: CVE-2026-74404)

CWE-ID: CWE-122 - Heap-based Buffer Overflow

CVSSv4: 6.8 [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]

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to an off-by-one heap-based buffer overflow in snp_filter_reserved_mem_regions() when processing reserved memory region descriptors. A local user can trigger the vulnerable code path to cause a denial of service.

The issue occurs in the Linux kernel crypto ccp subsystem.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/1b864b6cb213bbd7b406e9b2e98c962077f300df
• https://git.kernel.org/stable/c/830c1f3e71989448652973375ef5e39b6ede47a3
• https://git.kernel.org/stable/c/af7341616b742ad2c374a90998bd650a035f694d
• https://git.kernel.org/stable/c/c5c79d92da0f9a09f48be5e2aabed2d6d1a96294