🛡️ UBUNTU-CVE-2025-21993
⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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.

Details

Severity Unknown
CVSS Score N/A
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2025-04-02
Updated 2026-06-15
Modified 2026-06-04
Fix URL N/A

Affected Packages

Software From version Fixed in
linux 6.8.0-58.60
linux-allwinner-5.19
linux-aws 6.8.0-1027.29
linux-aws-5.0
linux-aws-5.11
linux-aws-5.13
linux-aws-5.15 5.15.0-1082.89~20.04.1
linux-aws-5.19
linux-aws-5.3
linux-aws-5.4 5.4.0-1147.157~18.04.1
linux-aws-5.8
linux-aws-6.2
linux-aws-6.5
linux-aws-6.8 6.8.0-1027.29~22.04.1
linux-aws-fips 5.15.0-1082.89+fips1
linux-aws-hwe
linux-azure 6.8.0-1027.32
linux-azure-4.15
linux-azure-5.11
linux-azure-5.13
linux-azure-5.15 5.15.0-1087.96~20.04.1
linux-azure-5.19
linux-azure-5.3
linux-azure-5.4 5.4.0-1152.159~18.04.1
linux-azure-5.8
linux-azure-6.11 6.11.0-1013.13~24.04.1
linux-azure-6.2
linux-azure-6.5
linux-azure-6.8 6.8.0-1027.32~22.04.1
linux-azure-edge
linux-azure-fde 5.15.0-1087.96.1
linux-azure-fde-5.19
linux-azure-fde-6.2
linux-azure-fips 5.15.0-1087.96+fips1
linux-azure-nvidia 6.8.0-1014.15
linux-bluefield
linux-fips 6.8.0-78.78+fips1
linux-gcp 6.8.0-1028.30
linux-gcp-4.15
linux-gcp-5.11
linux-gcp-5.13
linux-gcp-5.15 5.15.0-1081.90~20.04.1
linux-gcp-5.19
linux-gcp-5.3
linux-gcp-5.4 5.4.0-1150.159~18.04.1
linux-gcp-5.8
linux-gcp-6.11 6.11.0-1013.13~24.04.1
linux-gcp-6.2
linux-gcp-6.5
linux-gcp-6.8 6.8.0-1028.30~22.04.1
linux-gcp-fips 5.15.0-1081.90+fips1
linux-gke 6.8.0-1023.27
linux-gke-4.15
linux-gke-5.15
linux-gke-5.4
linux-gkeop 6.8.0-1010.12
linux-gkeop-5.15
linux-gkeop-5.4
linux-hwe
linux-hwe-5.11
linux-hwe-5.13
linux-hwe-5.15 5.15.0-138.148~20.04.1
linux-hwe-5.19
linux-hwe-5.4 5.4.0-218.238~18.04.1
linux-hwe-5.8
linux-hwe-6.11 6.11.0-24.24~24.04.1
linux-hwe-6.2
linux-hwe-6.5
linux-hwe-6.8 6.8.0-58.60~22.04.1
linux-hwe-edge
linux-ibm 6.8.0-1024.24
linux-ibm-5.15 5.15.0-1074.77~20.04.1
linux-ibm-5.4 5.4.0-1093.98~18.04.1
linux-ibm-6.8 6.8.0-1024.24~22.04.1
linux-intel-5.13
linux-intel-iot-realtime 5.15.0-1075.77
linux-intel-iotg 5.15.0-1077.83
linux-intel-iotg-5.15 5.15.0-1077.83~20.04.1
linux-iot 5.4.0-1051.54
linux-kvm 5.15.0-1078.83
linux-lowlatency 6.8.0-58.60.1
linux-lowlatency-hwe-5.15 5.15.0-138.148~20.04.1
linux-lowlatency-hwe-5.19
linux-lowlatency-hwe-6.11 6.11.0-1012.13~24.04.1
linux-lowlatency-hwe-6.2
linux-lowlatency-hwe-6.5
linux-lowlatency-hwe-6.8 6.8.0-58.60.1~22.04.1
linux-lts-xenial
linux-nvidia 6.8.0-1026.29
linux-nvidia-6.11 6.11.0-1007.7
linux-nvidia-6.2
linux-nvidia-6.5
linux-nvidia-6.8 6.8.0-1026.29~22.04.1
linux-nvidia-lowlatency 6.8.0-1026.29.1
linux-nvidia-tegra 6.8.0-1008.8
linux-nvidia-tegra-5.15 5.15.0-1039.39~20.04.1
linux-nvidia-tegra-igx 5.15.0-1023.23
linux-oem
linux-oem-5.10
linux-oem-5.13
linux-oem-5.14
linux-oem-5.17
linux-oem-5.6
linux-oem-6.0
linux-oem-6.1
linux-oem-6.11 6.11.0-1020.20
linux-oem-6.5
linux-oem-6.8 6.8.0-1026.26
linux-oracle 6.8.0-1024.25
linux-oracle-5.0
linux-oracle-5.11
linux-oracle-5.13
linux-oracle-5.15 5.15.0-1079.85~20.04.1
linux-oracle-5.3
linux-oracle-5.4 5.4.0-1145.155~18.04.1
linux-oracle-5.8
linux-oracle-6.5
linux-oracle-6.8 6.8.0-1024.25~22.04.1
linux-raspi 6.8.0-1028.32
linux-raspi-5.4 5.4.0-1130.143~18.04.1
linux-raspi-realtime 6.8.0-2023.24
linux-raspi2
linux-realtime 6.8.1-1020.21
linux-realtime-6.8 6.8.1-1020.21~22.04.1
linux-riscv 6.8.0-58.60.1
linux-riscv-5.11
linux-riscv-5.15 5.15.0-1077.81~20.04.1
linux-riscv-5.19
linux-riscv-5.8
linux-riscv-6.5
linux-riscv-6.8 6.8.0-58.60.1~22.04.1
linux-starfive-5.19
linux-starfive-6.2
linux-starfive-6.5
linux-xilinx 6.8.0-1017.18
linux-xilinx-zynqmp 5.15.0-1046.50

References

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