Tracker / CVE-2025-21993
CVE-2025-21993
High 7.1
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 products and versions
| linux | linux_kernel |
|---|---|
| linux | linux_kernel · … → 6.1.132 |
| linux | linux_kernel · 6.13 → 6.13.8 |
| linux | linux_kernel · 6.2 → 6.6.84 |
| linux | linux_kernel · 6.7 → 6.12.20 |
Analysis
This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.