SB20261022468 - NULL pointer dereference in Linux kernel net driver

Description

This security bulletin contains information about 1 vulnerability.

1) NULL pointer dereference (CVE-ID: CVE-2026-98849)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: 5.6 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local privileged user to cause a denial of service through a kernel NULL pointer dereference.

The vulnerability exists due to a NULL pointer dereference in the Linux kernel PFCP driver's socket cleanup when network device registration fails after device initialization succeeds. A local privileged user can trigger PFCP network device creation under these failure conditions to cause the error path to release an already released and cleared socket, resulting in a denial of service.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/0f17d2e3dd9cda3ee6d94033d5e5489af168920d
• https://git.kernel.org/stable/c/2cee3603ec1d9b5ec7f2121ea3efe9488e906f46
• https://git.kernel.org/stable/c/4b8ce1686dea1a10805a0807bf492409b0300ee1
• https://git.kernel.org/stable/c/dcb8f6a79c3360a440c399d85df465a6e59351f1