Privilege escalation in Linux kernel ntfs3

1) Use-after-free

EUVDB-ID: #VU74156

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-26606

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the ntfs_trim_fs() function in fs/ntfs3/bitmap.c in Linux kernel. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Linux kernel: 6.0.8

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:6.0.8:*:*:*:*:*:*:*

External links

https://lkml.org/lkml/2023/2/20/860
https://security.netapp.com/advisory/ntap-20230316-0010/

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.