CVE-2024-39475: fbdev: savage: Handle err return when savagefb_check_var failed
First published: Fri Jul 05 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: fbdev: savage: Handle err return when savagefb_check_var failed The commit 04e5eac8f3ab("fbdev: savage: Error out if pixclock equals zero") checks the value of pixclock to avoid divide-by-zero error. However the function savagefb_probe doesn't handle the error return of savagefb_check_var. When pixclock is 0, it will cause divide-by-zero error.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=4.19<4.19.316 | |
| Linux Kernel | >=5.4<5.4.278 | |
| Linux Kernel | >=5.10<5.10.219 | |
| Linux Kernel | >=5.15<5.15.161 | |
| Linux Kernel | >=6.1<6.1.94 | |
| Linux Kernel | >=6.6<6.6.34 | |
| Linux Kernel | >=6.9<6.9.5 | |
| debian/linux | 5.10.223-1 5.10.234-1 6.1.123-1 6.1.128-1 6.12.12-1 6.12.16-1 |
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Reference Links
- https://git.kernel.org/stable/c/32f92b0078ebf79dbe4827288e0acb50d89d3d5b
- https://git.kernel.org/stable/c/4b2c67e30b4e1d2ae19dba8b8e8f3b5fd3cf8089
- https://git.kernel.org/stable/c/5f446859bfa46df0ffb34149499f48a2c2d8cd95
- https://git.kernel.org/stable/c/6ad959b6703e2c4c5d7af03b4cfd5ff608036339
- https://git.kernel.org/stable/c/86435f39c18967cdd937d7a49ba539cdea7fb547
- https://git.kernel.org/stable/c/b8385ff814ca4cb7e63789841e6ec2a14c73e1e8
- https://git.kernel.org/stable/c/be754cbd77eaf2932408a4e18532e4945274a5c7
- https://git.kernel.org/stable/c/edaa57480b876e8203b51df7c3d14a51ea6b09e3
- https://git.kernel.org/linus/6ad959b6703e2c4c5d7af03b4cfd5ff608036339
- https://security-tracker.debian.org/tracker/CVE-2024-39475
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-39475
- https://nvd.nist.gov/vuln/detail/CVE-2024-39475
- https://launchpad.net/bugs/cve/CVE-2024-39475
- https://ubuntu.com/security/CVE-2024-39475
Frequently Asked Questions
What is the severity of CVE-2024-39475?
CVE-2024-39475 has a medium severity rating due to its potential impact on the Linux kernel.
How do I fix CVE-2024-39475?
To fix CVE-2024-39475, update the Linux kernel to a version that includes the commit referenced in the resolution.
What versions of the Linux kernel are affected by CVE-2024-39475?
CVE-2024-39475 affects multiple versions of the Linux kernel, specifically those between 4.19 and certain 5.x and 6.x versions.
What is the primary issue with CVE-2024-39475?
The primary issue with CVE-2024-39475 is that it involves a divide-by-zero error which can cause instability in systems utilizing the fbdev subsystem.
Is CVE-2024-39475 related to specific hardware?
CVE-2024-39475 is related to the Savage framebuffer driver in the Linux kernel, affecting certain hardware configurations.
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