CVE-2026-98879
kernel: isofs: handle set_blocksize failures
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 23, 2026
Updated · October 26, 2026
Description
A flaw was found in the Linux kernel's ISO 9660 (isofs) file system driver. The driver fails to handle errors when setting the storage block size during mount operations. A local user could exploit this flaw by mounting a specially crafted disk image with an invalid block size, triggering a kernel panic and leading to a Denial of Service (DoS).
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 4.4CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
CWE-617 · Reachable Assertion