CVE-2024-26778

2024-04-0300:00:00

ubuntu.com

linux kernel

framebuffer device

pixclock

divide-by-zero

ioctl

driver validation

cve-2024-26778

i740fb fix

5.5 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

6.5 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

12.6%

JSON

In the Linux kernel, the following vulnerability has been resolved: fbdev:
savage: Error out if pixclock equals zero The userspace program could pass
any values to the driver through ioctl() interface. If the driver doesn’t
check the value of pixclock, it may cause divide-by-zero error. Although
pixclock is checked in savagefb_decode_var(), but it is not checked
properly in savagefb_probe(). Fix this by checking whether pixclock is zero
in the function savagefb_check_var() before info->var.pixclock is used as
the divisor. This is similar to CVE-2022-3061 in i740fb which was fixed by
commit 15cf0b8.

OSVersionArchitecturePackageVersionFilename
ubuntu20.04noarchlinux< 5.4.0-186.206UNKNOWN
ubuntu22.04noarchlinux< 5.15.0-112.122UNKNOWN
ubuntu23.10noarchlinux< anyUNKNOWN
ubuntu20.04noarchlinux-aws< 5.4.0-1126.136UNKNOWN
ubuntu22.04noarchlinux-aws< 5.15.0-1063.69UNKNOWN
ubuntu23.10noarchlinux-aws< anyUNKNOWN
ubuntu20.04noarchlinux-aws-5.15< 5.15.0-1063.69~20.04.1UNKNOWN
ubuntu18.04noarchlinux-aws-5.4< 5.4.0-1126.136~18.04.1UNKNOWN
ubuntu22.04noarchlinux-aws-6.5< anyUNKNOWN
ubuntu20.04noarchlinux-azure< 5.4.0-1131.138UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	20.04	noarch	linux	< 5.4.0-186.206	UNKNOWN
ubuntu	22.04	noarch	linux	< 5.15.0-112.122	UNKNOWN
ubuntu	23.10	noarch	linux	< any	UNKNOWN
ubuntu	20.04	noarch	linux-aws	< 5.4.0-1126.136	UNKNOWN
ubuntu	22.04	noarch	linux-aws	< 5.15.0-1063.69	UNKNOWN
ubuntu	23.10	noarch	linux-aws	< any	UNKNOWN
ubuntu	20.04	noarch	linux-aws-5.15	< 5.15.0-1063.69~20.04.1	UNKNOWN
ubuntu	18.04	noarch	linux-aws-5.4	< 5.4.0-1126.136~18.04.1	UNKNOWN
ubuntu	22.04	noarch	linux-aws-6.5	< any	UNKNOWN
ubuntu	20.04	noarch	linux-azure	< 5.4.0-1131.138	UNKNOWN