SB20240531326 - NULL pointer dereference in Linux kernel ecryptfs

Description

This security bulletin contains information about 1 vulnerability.

1) NULL pointer dereference (CVE-ID: CVE-2023-52779)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: 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/E:U/U:Clear

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to NULL pointer dereference within the vfs_getattr_nosec() and vfs_getattr() functions in fs/stat.c, within the ovl_getattr() function in fs/overlayfs/inode.c, within the ecryptfs_getattr_link() and ecryptfs_getattr() functions in fs/ecryptfs/inode.c. A local user can perform a denial of service (DoS) attack.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/3fb0fa08641903304b9d81d52a379ff031dc41d4
• https://git.kernel.org/stable/c/8a924db2d7b5eb69ba08b1a0af46e9f1359a9bdf
• https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.4
• https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.7