Fedora 38 update for kernel, kernel-headers, kernel-tools

Published: 2023-08-21 | Updated: 2023-09-04

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2023-31248 CVE-2023-35001
CWE-ID	CWE-416 CWE-787
Exploitation vector	Local
Public exploit	Public exploit code for vulnerability #2 is available.
Vulnerable software	Fedora Operating systems & Components / Operating system kernel-tools Operating systems & Components / Operating system package or component kernel-headers Operating systems & Components / Operating system package or component kernel Operating systems & Components / Operating system package or component
Vendor	Fedoraproject

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Use-after-free

EUVDB-ID: #VU78325

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-2023-31248

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 in nft_chain_lookup_byid() function, which failed to check whether a chain was active and CAP_NET_ADMIN is in any user or network namespace. A local user ca trigger a use-after-free error and execute arbitrary code with elevated privileges.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 38

kernel-tools: before 6.4.4-200.fc38

kernel-headers: before 6.4.4-200.fc38

kernel: before 6.4.4-200.fc38

CPE2.3

External links

https://bodhi.fedoraproject.org/updates/FEDORA-2023-e4e985b5dd

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.

2) Out-of-bounds write

EUVDB-ID: #VU78326