CVE-2025-21993
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2025-21993
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-21993.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2025-21993
- Downstream
- Related
- Published
- 2025-04-02T13:15:43Z
- Modified
- 2025-08-09T20:01:27Z
- Severity
-
- 7.1 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
iscsiibft: Fix UBSAN shift-out-of-bounds warning in ibftattrshownic()
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.
- References
-
- https://git.kernel.org/stable/c/07e0d99a2f701123ad3104c0f1a1e66bce74d6e5
- https://git.kernel.org/stable/c/2d1eef248107bdf3d5a69d0fde04c30a79a7bf5d
- https://git.kernel.org/stable/c/9bfa80c8aa4e06dff55a953c3fffbfc68a3a3b1c
- https://git.kernel.org/stable/c/a858cd58dea06cf85b142673deea8c5d87f11e70
- https://git.kernel.org/stable/c/b253660fac5e0e9080d2c95e3a029e1898d49afb
- https://git.kernel.org/stable/c/b388e185bfad32bfed6a97a6817f74ca00a4318f
- https://git.kernel.org/stable/c/c1c6e527470e5eab0b2d57bd073530fbace39eab
- https://git.kernel.org/stable/c/f763c82db8166e28f45b7cc4a5398a7859665940