CVE-2022-50102
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2022-50102
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50102.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2022-50102
- Downstream
- Related
- Published
- 2025-06-18T11:15:39Z
- Modified
- 2025-06-18T16:48:21.270341Z
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
video: fbdev: arkfb: Fix a divide-by-zero bug in arksetpixclock()
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 in: drivers/video/fbdev/arkfb.c:784: arksetpixclock(info, (hdiv * info->var.pixclock) / hmul); with hdiv=1, pixclock=1 and hmul=2 you end up with (1*1)/2 = (int) 0. and then in: drivers/video/fbdev/arkfb.c:504: rv = dacsetfreq(par->dac, 0, 1000000000 / pixclock); we'll get a division-by-zero.
The following log can reveal it:
divide error: 0000 [#1] PREEMPT SMP KASAN PTI RIP: 0010:arksetpixclock drivers/video/fbdev/arkfb.c:504 [inline] RIP: 0010:arkfbsetpar+0x10fc/0x24c0 drivers/video/fbdev/arkfb.c:784 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 arksetpixclock() first.
- References
-
- https://git.kernel.org/stable/c/0288fa799e273b08839037499d704dc7bdc13e9a
- https://git.kernel.org/stable/c/15661642511b2b192077684a89f42a8d95d54286
- https://git.kernel.org/stable/c/236c1502520b7b08955467ec2e50b3232e34f1f9
- https://git.kernel.org/stable/c/2f1c4523f7a3aaabe7e53d3ebd378292947e95c8
- https://git.kernel.org/stable/c/76b3f0a0b56e53a960a14624a0f48b3d94b5e7e7
- https://git.kernel.org/stable/c/9ebc5031958c1f3a2795e4533b4091d77c738d14
- https://git.kernel.org/stable/c/a249e1b89ca25e1c34bdf96154e3f6224a91a9af
- https://git.kernel.org/stable/c/b9a66f23612b84617e04412169e155a4b92f632d
- https://security-tracker.debian.org/tracker/CVE-2022-50102
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