#VU124182 Symbolic Name not Mapping to Correct Object in Linux kernel - CVE-2026-23266
Published: March 20, 2026
Vulnerability identifier: #VU124182
Vulnerability risk: Low
CVSSv4.0: 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/E:U/U:Clear
CVE-ID: CVE-2026-23266
CWE-ID: CWE-386
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a divide error in the fbdev: rivafb component when handling FBIOPUT_VSCREENINFO ioctl calls. A local user can send a specially crafted request to cause a divide error and crash the kernel.
The attacker can trigger the issue by calling FBIOPUT_VSCREENINFO on /dev/fb* with a malicious or misconfigured device that causes the state->mclk_khz value to be zero, leading to a division by zero in nv3_arb().
Remediation
Install security update from vendor's repository.
External links
- https://git.kernel.org/stable/c/0209e21e3c372fa2da04c39214bec0b64e4eb5f4
- https://git.kernel.org/stable/c/3e4cbd1d46c246dfa684c8e9d8c20ae0b960c50a
- https://git.kernel.org/stable/c/526460a96c5443e2fc0fd231edd1f9c49d2de26b
- https://git.kernel.org/stable/c/52916878db2b8e3769743a94484729f0844352df
- https://git.kernel.org/stable/c/73f0391e92d404da68f7484e57c106c5e673dc7e
- https://git.kernel.org/stable/c/78daf5984d96edec3b920c72a93bd6821b8710b7
- https://git.kernel.org/stable/c/9efa0dc46270a8723c158c64afbcf1dead72b28c
- https://git.kernel.org/stable/c/ec5a58f4fd581875593ea92a65485e1906a53c0f