SB20261029131 - NULL pointer dereference in Linux kernel rds

Description

This security bulletin contains information about 1 vulnerability.

1) NULL pointer dereference (CVE-ID: CVE-2026-99166)

CWE-ID: CWE-476 - NULL Pointer Dereference

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 by crashing the Linux kernel.

The vulnerability exists due to a null pointer dereference in the RDS RDMA connection event handler when processing a resolved route for an outgoing connection bound to an iWARP device. A local user can initiate an RDS connection whose local address resolves to an iWARP device to reach a write through the unset cm_id->route.path_rec pointer and crash the kernel.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/492ba6ac1b1ffb8a06ff52db0825c1af2cdb28c8
• https://git.kernel.org/stable/c/5f23e4e3a31dacfd82a8f56be253adc0910ee84f
• https://git.kernel.org/stable/c/ca14c289ed9ffed6cc64290d039e923e5720a8bf