SB2026032087 - Symbolic Name not Mapping to Correct Object in Linux kernel fbdev riva driver
Published: March 20, 2026
Security Bulletin ID
SB2026032087
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Symbolic Name not Mapping to Correct Object (CVE-ID: CVE-2026-23266)
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 update from vendor's website.
References
- 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