SB20261022166 - Memory corruption in Linux kernel bpf

Description

This security bulletin contains information about 1 vulnerability.

1) Memory corruption (CVE-ID: CVE-2026-98589)

CWE-ID: CWE-119 - Memory corruption

CVSSv4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local privileged user to potentially corrupt kernel memory or cause a denial of service.

The vulnerability exists due to incorrect tracking of packet-memory pointer validity in the Linux kernel BPF verifier when packet pointers are passed to subprograms that may mutate packet data. A local privileged user can submit a crafted BPF program that passes a packet pointer to such a subprogram to potentially access invalidated packet memory and cause kernel memory corruption or a denial of service.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/0b6b2bb9b90ad1e2d94d18f626258a1dbbdee0ea
• https://git.kernel.org/stable/c/a6c1edfbe240e4377038a0e1d233ad81fde9a21b