SB20261023109 - Deadlock in Linux kernel google gve driver

Description

This security bulletin contains information about 1 vulnerability.

1) Deadlock (CVE-ID: CVE-2026-99048)

CWE-ID: CWE-833 - Deadlock

CVSSv4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/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 by triggering a deadlock in the Linux kernel GVE network driver.

The vulnerability exists due to recursive acquisition of the netdev lock in gve_xsk_pool_disable() when disabling XSK pools. A local privileged user can trigger an XSK pool disable operation that calls napi_disable() or napi_enable() while the calling thread already holds the netdev lock, causing the thread to deadlock and disrupting the affected network device's operation.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/0cb6939a4dfefa822007b7a71986e06bc4f61f54
• https://git.kernel.org/stable/c/3d377911ce81fd4e61af814e750d8e08879a5208
• https://git.kernel.org/stable/c/42935a61001927aa01db10b53b420efd37eaa99b