PT-2025-14490 · Linux+9 · Linux Kernel+9
Published
2025-01-14
·
Updated
2026-01-20
·
CVE-2025-21993
CVSS v3.1
7.1
High
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
A vulnerability in the Linux kernel has been resolved, related to the iscsi ibft module. When performing an iSCSI boot using IPv6, the iscsistart still reads the /sys/firmware/ibft/ethernetX/subnet-mask entry, causing a UBSAN shift-out-of-bounds warning due to the IPv6 prefix length being 64. The concept of a subnet mask does not apply to IPv6, and the value is set to ~0 to suppress the warning message.
Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Out of bounds Read
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Almalinux
Astra Linux
Debian
Linuxmint
Linux Kernel
Red Hat
Red Os
Suse
Ubuntu