Out-of-bounds read in Linux kernel - CVE-2026-74350

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Main Vulnerability Database Vulnerabilities #VU142838

Out-of-bounds read in Linux kernel - CVE-2026-74350

Published: August 15, 2026


Vulnerability identifier: #VU142838
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-74350
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to disclose sensitive information.

The vulnerability exists due to an out-of-bounds read in the ocfs2 fast symlink read path when processing a malformed zero-cluster symlink inode. A local user can provide a crafted filesystem image containing an invalid fast symlink to disclose sensitive information.

The issue is triggered when the inline symlink payload is not NUL-terminated at the recorded size or when the recorded size exceeds the inline fast-symlink capacity.


Affected software

Linux kernel
Debian Linux
Ubuntu
linux (Ubuntu package)
linux-lts-xenial (Ubuntu package)
linux-kvm (Ubuntu package)
linux-aws (Ubuntu package)
linux-oracle (Ubuntu package)
linux-azure (Ubuntu package)
linux-gcp (Ubuntu package)
linux-hwe-5.4 (Ubuntu package)
linux-xilinx-zynqmp (Ubuntu package)
linux-ibm (Ubuntu package)
linux-bluefield (Ubuntu package)
linux-iot (Ubuntu package)
linux-raspi (Ubuntu package)
linux-ibm-5.4 (Ubuntu package)
linux-aws-5.4 (Ubuntu package)
linux-azure-5.4 (Ubuntu package)
linux-gcp-5.4 (Ubuntu package)
linux-oracle-5.4 (Ubuntu package)
linux-raspi-5.4 (Ubuntu package)
linux-fips (Ubuntu package)
linux-aws-fips (Ubuntu package)
linux-gcp-fips (Ubuntu package)
linux-azure-fips (Ubuntu package)
linux-lowlatency (Ubuntu package)
linux-gke (Ubuntu package)
linux-aws-5.15 (Ubuntu package)
linux-lowlatency-hwe-5.15 (Ubuntu package)
linux-hwe-5.15 (Ubuntu package)
linux-azure-5.15 (Ubuntu package)
linux-ibm-5.15 (Ubuntu package)
linux-azure-fde-5.15 (Ubuntu package)
linux-nvidia (Ubuntu package)
linux-gkeop (Ubuntu package)
linux-realtime (Ubuntu package)
linux-nvidia-tegra (Ubuntu package)
linux-intel-iotg (Ubuntu package)
linux-intel-iotg-5.15 (Ubuntu package)
linux-oracle-5.15 (Ubuntu package)
linux-gcp-5.15 (Ubuntu package)
linux-nvidia-tegra-5.15 (Ubuntu package)
linux-azure-fde (Ubuntu package)
linux-intel-iot-realtime (Ubuntu package)
linux-hwe-6.8 (Ubuntu package)
linux-lowlatency-hwe-6.8 (Ubuntu package)
linux-azure-fde-6.8 (Ubuntu package)
linux-azure-6.8 (Ubuntu package)
linux-aws-6.8 (Ubuntu package)
linux-oracle-6.8 (Ubuntu package)
linux-nvidia-lowlatency (Ubuntu package)
linux-vmware (Ubuntu package)
linux-ibm-6.8 (Ubuntu package)
linux-gcp-6.8 (Ubuntu package)
linux-raspi-realtime (Ubuntu package)
linux-realtime-6.8 (Ubuntu package)
linux-nvidia-bos (Ubuntu package)
linux-hwe-7.0 (Ubuntu package)
linux-oracle-7.0 (Ubuntu package)
linux-gcp-7.0 (Ubuntu package)
linux-oem-7.0 (Ubuntu package)
linux-aws-7.0 (Ubuntu package)
linux-nvidia-7.0 (Ubuntu package)
linux (Debian package)
linux-azure-7.0 (Ubuntu package)

How to mitigate CVE-2026-74350

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
linux (Ubuntu package) - addressed in versions 4.4.0-291.325, 5.4.0-245.265, 5.15.0-203.213, 6.8.0-149.149, 7.0.0-34.34
linux-lts-xenial (Ubuntu package) - update to 4.4.0-291.325~14.04.1
linux-kvm (Ubuntu package) - addressed in versions 4.4.0-1163.174, 5.4.0-1154.163, 5.15.0-1112.117
linux-aws (Ubuntu package) - addressed in versions 4.4.0-1162.168, 4.4.0-1200.215, 5.4.0-1167.178, 5.15.0-1120.127, 6.8.0-1069.74, 7.0.0-1013.13
linux-oracle (Ubuntu package) - addressed in versions 5.4.0-1165.175, 5.15.0-1117.123, 6.8.0-1067.71, 7.0.0-1012.12
linux-azure (Ubuntu package) - addressed in versions 5.4.0-1172.178, 5.15.0-1126.135, 6.8.0-1073.82, 7.0.0-1016.16, 7.0.0-1017.17
linux-gcp (Ubuntu package) - addressed in versions 5.4.0-1170.180, 5.15.0-1121.131, 6.8.0-1073.81, 7.0.0-1013.13
linux-hwe-5.4 (Ubuntu package) - update to 5.4.0-245.265~18.04.1
linux-xilinx-zynqmp (Ubuntu package) - update to 5.4.0-1085.89
linux-ibm (Ubuntu package) - addressed in versions 5.4.0-1113.118, 5.15.0-1114.118, 6.8.0-1069.70, 7.0.0-1014.14
linux-bluefield (Ubuntu package) - update to 5.4.0-1126.133
linux-iot (Ubuntu package) - update to 5.4.0-1071.74
linux-raspi (Ubuntu package) - addressed in versions 5.4.0-1149.162, 5.15.0-1113.116, 6.8.0-1068.72, 7.0.0-1020.20
linux-ibm-5.4 (Ubuntu package) - update to 5.4.0-1113.118~18.04.1
linux-aws-5.4 (Ubuntu package) - update to 5.4.0-1167.178~18.04.1
linux-azure-5.4 (Ubuntu package) - update to 5.4.0-1172.178~18.04.1
linux-gcp-5.4 (Ubuntu package) - update to 5.4.0-1170.180~18.04.1
linux-oracle-5.4 (Ubuntu package) - update to 5.4.0-1165.175~18.04.1
linux-raspi-5.4 (Ubuntu package) - update to 5.4.0-1149.162~18.04.1
linux-fips (Ubuntu package) - update to 5.4.0-1141.151
linux-aws-fips (Ubuntu package) - addressed in versions 5.4.0-1167.178+fips1, 5.15.0-1120.127+fips1, 6.8.0-1069.74+fips1
linux-gcp-fips (Ubuntu package) - addressed in versions 5.4.0-1170.180+fips1, 5.15.0-1121.131+fips1, 6.8.0-1073.81+fips1
linux-azure-fips (Ubuntu package) - addressed in versions 5.4.0-1172.178+fips1, 5.15.0-1126.135+fips1, 6.8.0-1073.82+fips1
linux-lowlatency (Ubuntu package) - addressed in versions 5.15.0-198.208, 6.8.0-149.149.1
linux-gke (Ubuntu package) - addressed in versions 5.15.0-1116.122, 6.8.0-1068.77, 7.0.0-1007.8
linux-aws-5.15 (Ubuntu package) - update to 5.15.0-1120.127~20.04.1
linux-lowlatency-hwe-5.15 (Ubuntu package) - update to 5.15.0-198.208~20.04.1
linux-hwe-5.15 (Ubuntu package) - update to 5.15.0-203.213~20.04.1
linux-azure-5.15 (Ubuntu package) - update to 5.15.0-1126.135~20.04.1
linux-ibm-5.15 (Ubuntu package) - update to 5.15.0-1114.118~20.04.1
linux-azure-fde-5.15 (Ubuntu package) - update to 5.15.0-1125.134~20.04.1
linux-nvidia (Ubuntu package) - addressed in versions 5.15.0-1115.116, 6.8.0-1067.70, 7.0.0-1025.26
linux-gkeop (Ubuntu package) - addressed in versions 5.15.0-1103.111, 6.8.0-1053.57
linux-realtime (Ubuntu package) - addressed in versions 5.15.0-1119.128, 6.8.1-1064.65, 7.0.0-34.34.1
linux-nvidia-tegra (Ubuntu package) - addressed in versions 5.15.0-1071.73, 6.8.0-1035.38
linux-intel-iotg (Ubuntu package) - update to 5.15.0-1115.121
linux-intel-iotg-5.15 (Ubuntu package) - update to 5.15.0-1115.121~20.04.1
linux-oracle-5.15 (Ubuntu package) - update to 5.15.0-1117.123~20.04.1
linux-gcp-5.15 (Ubuntu package) - update to 5.15.0-1121.131~20.04.1
linux-nvidia-tegra-5.15 (Ubuntu package) - update to 5.15.0-1071.73~20.04.1
linux-azure-fde (Ubuntu package) - addressed in versions 5.15.0-1125.134, 6.8.0-1071.78
linux-intel-iot-realtime (Ubuntu package) - update to 5.15.0-1112.116
linux-hwe-6.8 (Ubuntu package) - update to 6.8.0-149.149~22.04.1
linux-lowlatency-hwe-6.8 (Ubuntu package) - update to 6.8.0-149.149.1~22.04.1
linux-azure-fde-6.8 (Ubuntu package) - update to 6.8.0-1071.78~22.04.1
linux-azure-6.8 (Ubuntu package) - update to 6.8.0-1073.82~22.04.1
linux-aws-6.8 (Ubuntu package) - update to 6.8.0-1069.74~22.04.1
linux-oracle-6.8 (Ubuntu package) - update to 6.8.0-1067.71~22.04.1
linux-nvidia-lowlatency (Ubuntu package) - update to 6.8.0-1067.70.1
linux-vmware (Ubuntu package) - update to 6.8.0-1010.10
linux-ibm-6.8 (Ubuntu package) - update to 6.8.0-1069.70~22.04.1
linux-gcp-6.8 (Ubuntu package) - update to 6.8.0-1073.81~22.04.1
linux-raspi-realtime (Ubuntu package) - update to 6.8.0-2056.58
linux-realtime-6.8 (Ubuntu package) - update to 6.8.1-1064.65~22.04.1
linux-nvidia-bos (Ubuntu package) - update to 7.0.0-2022.23
linux-hwe-7.0 (Ubuntu package) - update to 7.0.0-34.34~24.04.1
linux-oracle-7.0 (Ubuntu package) - update to 7.0.0-1012.12~24.04.1
linux-gcp-7.0 (Ubuntu package) - update to 7.0.0-1013.13~24.04.1
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1014.14
linux-aws-7.0 (Ubuntu package) - update to 7.0.0-1013.13~24.04.1
linux-nvidia-7.0 (Ubuntu package) - update to 7.0.0-1024.25~24.04.1
linux (Debian package) - update to 6.12.115-2
linux-azure-7.0 (Ubuntu package) - addressed in versions 7.0.0-1016.16~24.04.1, 7.0.0-1017.17~24.04.1

External References

Related Security Bulletins