CVEvulnerability

CVE-2025-21993

7.1 HIGH Published 2025-04-02 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2025-04-02
Last modified
2026-06-17
Assigner
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS 3.1 ([email protected])
7.1 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
7.1 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Weaknesses
CWE-125

Description

In the Linux kernel, the following vulnerability has been resolved: iscsi_ibft: Fix UBSAN shift-out-of-bounds warning in ibft_attr_show_nic() When performing an iSCSI boot using IPv6, iscsistart still reads the /sys/firmware/ibft/ethernetX/subnet-mask entry. Since the IPv6 prefix length is 64, this causes the shift exponent to become negative, triggering a UBSAN warning. As the concept of a subnet mask does not apply to IPv6, the value is set to ~0 to suppress the warning message.

Affected configurations

• linux linux kernel (< 6.1.132) • linux linux kernel (>= 6.2 < 6.6.84) • linux linux kernel (>= 6.7 < 6.12.20) • linux linux kernel (>= 6.13 < 6.13.8) • linux linux kernel 6.14

Related

Weakness · CWE (1)

  • CWE-125 Out-of-bounds Read weakness

References