SB2026092015 - openEuler 20.03 LTS SP4 update for kernel
Published: September 20, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 vulnerabilities.
1) Race condition (CVE-ID: CVE-2026-74330)
CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a race condition in configfs directory entry child traversal when traversing s_children lists while concurrent cursor movement or freeing can occur. A local user can trigger concurrent configfs operations to cause a denial of service.
The issue affects configfs directory handling in fs/configfs/dir.c.
2) Use-after-free (CVE-ID: CVE-2026-74359)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a use-after-free in configfs_lookup() when handling subsequent getdents(2) operations in a directory after inode allocation failure. A local user can trigger inode allocation failure and then access the affected directory to cause a denial of service.
The issue occurs because a dangling pointer remains in the configfs_dirent structure and is later dereferenced to obtain an inode number.
3) Use-after-free (CVE-ID: CVE-2026-74730)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a use-after-free in the NFS FREE_STATEID handling in fs/nfs/nfs4proc.c when processing a delayed FREE_STATEID operation. A local user can trigger a delayed FREE_STATEID operation to cause a denial of service.
Remediation
Install update from vendor's website.