Out-of-bounds Read in Linux Kernel

CVE-2018-1093

The ext4_valid_block_bitmap function in fs/ext4/balloc.c in the Linux kernel through 4.15.15 allows attackers to cause a denial of service (out-of-bounds read and system crash) via a crafted ext4 image because balloc.c and ialloc.c do not validate bitmap block numbers.

Vulnerability class: Buffer Overflow

EPSS: 0.020 (78.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

Affected products

  • Linux Linux_kernel
  • N/a Linux Kernel Through Version 4.15 — versions Linux kernel through version 4.15

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2018-1093?
CVE-2018-1093 is a medium-severity vulnerability in Linux Kernel, classified under Out-of-bounds Read. CVSS score: 5.5/10. Published 2018-04-02.
How severe is CVE-2018-1093?
Medium severity. CVSS v3 base score is 5.5 out of 10.