CVE-2026-31603
Published: May 3, 2026Last modified: June 2, 2026
Description
In the Linux kernel, the following vulnerability has been resolved: staging: sm750fb: fix division by zero in ps_to_hz() ps_to_hz() is called from hw_sm750_crtc_set_mode() without validating that pixclock is non-zero. A zero pixclock passed via FBIOPUT_VSCREENINFO causes a division by zero. Fix by rejecting zero pixclock in lynxfb_ops_check_var(), consistent with other framebuffer drivers.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.5 |
| Attack Vector | LOCAL |
| Attack complexity | LOW |
| Privileges required | LOW |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Fixed (6.1.175-r0) |
| 25 LTS | linux-lts | Fixed (6.12.85-r0) | |
| Stream | linux-lts | Fixed (6.12.85-r0) |
References
- https://git.kernel.org/stable/c/124a43550db8a74eef080cd4573a4904efe67029
- https://git.kernel.org/stable/c/1412ba36597a82e928f20047f41d6c6582dafe8a
- https://git.kernel.org/stable/c/2f640c6043aeab31a2f607d7605271860c3b11df
- https://git.kernel.org/stable/c/3300b049693138852a4c6738b5f1194a1ee91ddd
- https://git.kernel.org/stable/c/6144895a4335a2491c282931f1f2fa610b86339f
- https://git.kernel.org/stable/c/75a1621e4f91310673c9acbcbb25c2a7ff821cd3
- https://git.kernel.org/stable/c/779412e0e391fd4a0d12e1d1adaa7bf043de62d7
- https://git.kernel.org/stable/c/b285a8f3bbb821a93eb37c2740a68ca1d7112a59
- https://git.kernel.org/stable/c/daf6733bd7c4c5015b431739ac29b0e29021096b