CVE-2024-26777

Summary

In the Linux kernel, the following vulnerability has been resolved:

fbdev: sis: 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.

In sisfb_check_var(), var->pixclock is used as a divisor to caculate drate before it is checked against zero. Fix this by checking it at the beginning.

This is similar to CVE-2022-3061 in i740fb which was fixed by commit 15cf0b8.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 84246c35ca34207114055a87552a1c4289c8fd7eaffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 6db07619d173765bd8622d63809cbfe361f04207affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < cd36da760bd1f78c63c7078407baf01dd724f313affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < df6e2088c6f4cad539cf67cba2d6764461e798d1affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < f329523f6a65c3bbce913ad35473d83a319d5d99affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 99f1abc34a6dde248d2219d64aa493c76bbdd9ebaffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 1d11dd3ea5d039c7da089f309f39c4cd363b924baffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < e421946be7d9bf545147bea8419ef8239cb7ca52affected
LinuxLinux2.6.12affected
LinuxLinux0 < 2.6.12unaffected
LinuxLinux4.19.308 <= 4.19.*unaffected
LinuxLinux5.4.270 <= 5.4.*unaffected
LinuxLinux5.10.211 <= 5.10.*unaffected
LinuxLinux5.15.150 <= 5.15.*unaffected
LinuxLinux6.1.80 <= 6.1.*unaffected
LinuxLinux6.6.19 <= 6.6.*unaffected
LinuxLinux6.7.7 <= 6.7.*unaffected
LinuxLinux6.8 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

CVE Program Container

Additional References

References