CVE-2022-50010
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2022-50010
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50010.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2022-50010
- Related
- Published
- 2025-06-18T11:15:28Z
- Modified
- 2025-06-18T16:47:15.083272Z
- Downstream
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
video: fbdev: i740fb: Check the argument of i740calcvclk()
Since the user can control the arguments of the ioctl() from the user space, under special arguments that may result in a divide-by-zero bug.
If the user provides an improper 'pixclock' value that makes the argumet of i740calcvclk() less than 'I740RFREQFIX', it will cause a divide-by-zero bug in: drivers/video/fbdev/i740fb.c:353 pbest = min(15, ilog2(I740MAXVCOFREQ / (freq / I740RFREQFIX)));
The following log can reveal it:
divide error: 0000 [#1] PREEMPT SMP KASAN PTI RIP: 0010:i740calcvclk drivers/video/fbdev/i740fb.c:353 [inline] RIP: 0010:i740fbdecodevar drivers/video/fbdev/i740fb.c:646 [inline] RIP: 0010:i740fbsetpar+0x163f/0x3b70 drivers/video/fbdev/i740fb.c:742 Call Trace: fbsetvar+0x604/0xeb0 drivers/video/fbdev/core/fbmem.c:1034 dofbioctl+0x234/0x670 drivers/video/fbdev/core/fbmem.c:1110 fb_ioctl+0xdd/0x130 drivers/video/fbdev/core/fbmem.c:1189
Fix this by checking the argument of i740calcvclk() first.
- References
-
- https://git.kernel.org/stable/c/2b7f559152a33c55f51b569b22efbe5e24886798
- https://git.kernel.org/stable/c/40bf722f8064f50200b8c4f8946cd625b441dda9
- https://git.kernel.org/stable/c/4b20c61365140d432dee7da7aa294215e7b900d9
- https://git.kernel.org/stable/c/59cefb583c984c0da8cf21a4c57d26d5a20dff5c
- https://git.kernel.org/stable/c/656689cb03ada4650016c153346939a1c334b1ae
- https://git.kernel.org/stable/c/d2d375eb68b4b8de6ea7460483a26fa9de56b443
- https://git.kernel.org/stable/c/e740e787f06671455b59d1e498c9945f7b4e7b3b
- https://git.kernel.org/stable/c/f350812e2d15278f1d867eeb997407782234fb3c
- https://security-tracker.debian.org/tracker/CVE-2022-50010
Affected packages
Debian:11 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affectedFixed5.10.140-1
Debian:12 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source
Debian:13 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source