CVE-2025-21993 (GCVE-0-2025-21993)

Vulnerability from cvelistv5 – Published: 2025-04-02 12:53 – Updated: 2026-01-02 15:28
VLAI?
Title
iscsi_ibft: Fix UBSAN shift-out-of-bounds warning in ibft_attr_show_nic()
Summary
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.
CWE
Assigner
Impacted products
Vendor Product Version
Linux Linux Affected: 138fe4e069798d9aa948a5402ff15e58f483ee4e , < a858cd58dea06cf85b142673deea8c5d87f11e70 (git)
Affected: 138fe4e069798d9aa948a5402ff15e58f483ee4e , < f763c82db8166e28f45b7cc4a5398a7859665940 (git)
Affected: 138fe4e069798d9aa948a5402ff15e58f483ee4e , < b388e185bfad32bfed6a97a6817f74ca00a4318f (git)
Affected: 138fe4e069798d9aa948a5402ff15e58f483ee4e , < 9bfa80c8aa4e06dff55a953c3fffbfc68a3a3b1c (git)
Affected: 138fe4e069798d9aa948a5402ff15e58f483ee4e , < 2d1eef248107bdf3d5a69d0fde04c30a79a7bf5d (git)
Affected: 138fe4e069798d9aa948a5402ff15e58f483ee4e , < b253660fac5e0e9080d2c95e3a029e1898d49afb (git)
Affected: 138fe4e069798d9aa948a5402ff15e58f483ee4e , < c1c6e527470e5eab0b2d57bd073530fbace39eab (git)
Affected: 138fe4e069798d9aa948a5402ff15e58f483ee4e , < 07e0d99a2f701123ad3104c0f1a1e66bce74d6e5 (git)
Create a notification for this product.
    Linux Linux Affected: 2.6.26
Unaffected: 0 , < 2.6.26 (semver)
Unaffected: 5.4.292 , ≤ 5.4.* (semver)
Unaffected: 5.10.236 , ≤ 5.10.* (semver)
Unaffected: 5.15.180 , ≤ 5.15.* (semver)
Unaffected: 6.1.132 , ≤ 6.1.* (semver)
Unaffected: 6.6.84 , ≤ 6.6.* (semver)
Unaffected: 6.12.20 , ≤ 6.12.* (semver)
Unaffected: 6.13.8 , ≤ 6.13.* (semver)
Unaffected: 6.14 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website

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  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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Detection rules are retrieved from Rulezet.

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