Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: video: fbdev: arkfb: Fix a divide-by-zero bug in ark_set_pixclock() 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: ark_set_pixclock(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 = dac_set_freq(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:ark_set_pixclock drivers/video/fbdev/arkfb.c:504 [inline] RIP: 0010:arkfb_set_par+0x10fc/0x24c0 drivers/video/fbdev/arkfb.c:784 Call Trace: fb_set_var+0x604/0xeb0 drivers/video/fbdev/core/fbmem.c:1034 do_fb_ioctl+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 ark_set_pixclock() first.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 681e14730c73cc2c71af282c001de6bc71c22f00 before 76b3f0a0b56e53a960a14624a0f48b3d94b5e7e7; affected 681e14730c73cc2c71af282c001de6bc71c22f00 before b9a66f23612b84617e04412169e155a4b92f632d; affected 681e14730c73cc2c71af282c001de6bc71c22f00 before a249e1b89ca25e1c34bdf96154e3f6224a91a9af; affected 681e14730c73cc2c71af282c001de6bc71c22f00 before 0288fa799e273b08839037499d704dc7bdc13e9a; affected 681e14730c73cc2c71af282c001de6bc71c22f00 before 236c1502520b7b08955467ec2e50b3232e34f1f9; affected 681e14730c73cc2c71af282c001de6bc71c22f00 before 9ebc5031958c1f3a2795e4533b4091d77c738d14; affected 681e14730c73cc2c71af282c001de6bc71c22f00 before 15661642511b2b192077684a89f42a8d95d54286; affected 681e14730c73cc2c71af282c001de6bc71c22f00 before 2f1c4523f7a3aaabe7e53d3ebd378292947e95c8 |
| Linux / Linux | affected 2.6.22; unaffected 0 before 2.6.22; unaffected 4.14.291 through 4.14.*; unaffected 4.19.256 through 4.19.*; unaffected 5.4.211 through 5.4.*; unaffected 5.10.137 through 5.10.*; unaffected 5.15.61 through 5.15.*; unaffected 5.18.18 through 5.18.*; unaffected 5.19.2 through 5.19.*; unaffected 6.0 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/76b3f0a0b56e53a960a14624a0f48b3d94b5e7e7
- https://git.kernel.org/stable/c/b9a66f23612b84617e04412169e155a4b92f632d
- https://git.kernel.org/stable/c/a249e1b89ca25e1c34bdf96154e3f6224a91a9af
- https://git.kernel.org/stable/c/0288fa799e273b08839037499d704dc7bdc13e9a
- https://git.kernel.org/stable/c/236c1502520b7b08955467ec2e50b3232e34f1f9
- https://git.kernel.org/stable/c/9ebc5031958c1f3a2795e4533b4091d77c738d14
- https://git.kernel.org/stable/c/15661642511b2b192077684a89f42a8d95d54286
- https://git.kernel.org/stable/c/2f1c4523f7a3aaabe7e53d3ebd378292947e95c8