#VU104749 Improper error handling in Linux kernel - CVE-2022-49409

Vulnerability identifier: #VU104749

Vulnerability risk: Low

CVSSv4.0: 4.3 [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]

CVE-ID: CVE-2022-49409

CWE-ID: CWE-388

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

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

The vulnerability exists due to improper error handling within the ext4_valid_extent_entries() function in fs/ext4/extents.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.18, 5.18 rc1, 5.18 rc2, 5.18 rc3, 5.18 rc5, 5.18 rc6, 5.18 rc7, 5.18 rc8, 5.18.1, 5.18.2

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External links
https://git.kernel.org/stable/c/3c617827cd51018bc377bd2954e176920ddbcfad
https://git.kernel.org/stable/c/4fd58b5cf118d2d9038a0b8c9cc0e43096297686
https://git.kernel.org/stable/c/59cf2fabbfe76de29d88dd7ae69858a25735b59f
https://git.kernel.org/stable/c/d0083459e2b6b07ebd78bea2fe684a19cc0f3d0f
https://git.kernel.org/stable/c/d36f6ed761b53933b0b4126486c10d3da7751e7f
https://git.kernel.org/stable/c/ea6ea18b3ab0c0d7fefffb3c4d27df758b1c790a
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.18.3

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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.