VDB
DEBIAN-CVE-2025-21993
DEBIAN-CVE-2025-21993
PUBLISHED
CVSS 7.099999904632568 HIGH
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.
Risk Scores
CVSS v3.1
7.099999904632568
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:12 | linux | 6.1.38-1, 6.1.55-1~bpo11+1, 6.1.64-1 |
| Debian:11 | linux-6.1 | 6.1.128-1, 0, 6.1.106-3~deb11u1 |
| Debian:14 | linux | 0, 0 |
| Debian:13 | linux | 0, 0 |
| Debian:11 | linux | 5.10.70-1, 5.10.103-1, 5.10.103-1~bpo10+1 |
Timeline
- Apr 2, 2025 CVE Published
- Apr 28, 2026 CVE Updated