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CVE Vulnerability Details :
CVE-2025-21993
PUBLISHED
More InfoOfficial Page
Assigner-Linux
Assigner Org ID-416baaa9-dc9f-4396-8d5f-8c081fb06d67
View Known Exploited Vulnerability (KEV) details
Published At-02 Apr, 2025 | 12:53
Updated At-02 Jan, 2026 | 15:28
Rejected At-
▼CVE Numbering Authority (CNA)
iscsi_ibft: Fix UBSAN shift-out-of-bounds warning in ibft_attr_show_nic()

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
Vendor
Linux Kernel Organization, IncLinux
Product
Linux
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Program Files
  • drivers/firmware/iscsi_ibft.c
Default Status
unaffected
Versions
Affected
  • From 138fe4e069798d9aa948a5402ff15e58f483ee4e before a858cd58dea06cf85b142673deea8c5d87f11e70 (git)
  • From 138fe4e069798d9aa948a5402ff15e58f483ee4e before f763c82db8166e28f45b7cc4a5398a7859665940 (git)
  • From 138fe4e069798d9aa948a5402ff15e58f483ee4e before b388e185bfad32bfed6a97a6817f74ca00a4318f (git)
  • From 138fe4e069798d9aa948a5402ff15e58f483ee4e before 9bfa80c8aa4e06dff55a953c3fffbfc68a3a3b1c (git)
  • From 138fe4e069798d9aa948a5402ff15e58f483ee4e before 2d1eef248107bdf3d5a69d0fde04c30a79a7bf5d (git)
  • From 138fe4e069798d9aa948a5402ff15e58f483ee4e before b253660fac5e0e9080d2c95e3a029e1898d49afb (git)
  • From 138fe4e069798d9aa948a5402ff15e58f483ee4e before c1c6e527470e5eab0b2d57bd073530fbace39eab (git)
  • From 138fe4e069798d9aa948a5402ff15e58f483ee4e before 07e0d99a2f701123ad3104c0f1a1e66bce74d6e5 (git)
Vendor
Linux Kernel Organization, IncLinux
Product
Linux
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Program Files
  • drivers/firmware/iscsi_ibft.c
Default Status
affected
Versions
Affected
  • 2.6.26
Unaffected
  • From 0 before 2.6.26 (semver)
  • From 5.4.292 through 5.4.* (semver)
  • From 5.10.236 through 5.10.* (semver)
  • From 5.15.180 through 5.15.* (semver)
  • From 6.1.132 through 6.1.* (semver)
  • From 6.6.84 through 6.6.* (semver)
  • From 6.12.20 through 6.12.* (semver)
  • From 6.13.8 through 6.13.* (semver)
  • From 6.14 through * (original_commit_for_fix)
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://git.kernel.org/stable/c/a858cd58dea06cf85b142673deea8c5d87f11e70
N/A
https://git.kernel.org/stable/c/f763c82db8166e28f45b7cc4a5398a7859665940
N/A
https://git.kernel.org/stable/c/b388e185bfad32bfed6a97a6817f74ca00a4318f
N/A
https://git.kernel.org/stable/c/9bfa80c8aa4e06dff55a953c3fffbfc68a3a3b1c
N/A
https://git.kernel.org/stable/c/2d1eef248107bdf3d5a69d0fde04c30a79a7bf5d
N/A
https://git.kernel.org/stable/c/b253660fac5e0e9080d2c95e3a029e1898d49afb
N/A
https://git.kernel.org/stable/c/c1c6e527470e5eab0b2d57bd073530fbace39eab
N/A
https://git.kernel.org/stable/c/07e0d99a2f701123ad3104c0f1a1e66bce74d6e5
N/A
Hyperlink: https://git.kernel.org/stable/c/a858cd58dea06cf85b142673deea8c5d87f11e70
Resource: N/A
Hyperlink: https://git.kernel.org/stable/c/f763c82db8166e28f45b7cc4a5398a7859665940
Resource: N/A
Hyperlink: https://git.kernel.org/stable/c/b388e185bfad32bfed6a97a6817f74ca00a4318f
Resource: N/A
Hyperlink: https://git.kernel.org/stable/c/9bfa80c8aa4e06dff55a953c3fffbfc68a3a3b1c
Resource: N/A
Hyperlink: https://git.kernel.org/stable/c/2d1eef248107bdf3d5a69d0fde04c30a79a7bf5d
Resource: N/A
Hyperlink: https://git.kernel.org/stable/c/b253660fac5e0e9080d2c95e3a029e1898d49afb
Resource: N/A
Hyperlink: https://git.kernel.org/stable/c/c1c6e527470e5eab0b2d57bd073530fbace39eab
Resource: N/A
Hyperlink: https://git.kernel.org/stable/c/07e0d99a2f701123ad3104c0f1a1e66bce74d6e5
Resource: N/A
▼Authorized Data Publishers (ADP)
1. CISA ADP Vulnrichment
Affected Products
Problem Types
TypeCWE IDDescription
CWECWE-125CWE-125 Out-of-bounds Read
Type: CWE
CWE ID: CWE-125
Description: CWE-125 Out-of-bounds Read
Metrics
VersionBase scoreBase severityVector
3.17.1HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Version: 3.1
Base score: 7.1
Base severity: HIGH
Vector:
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
2. CVE Program Container
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
N/A
https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
N/A
Hyperlink: https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
Resource: N/A
Hyperlink: https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
Resource: N/A
Details not found