#VU96533 NULL pointer dereference in Linux kernel - CVE-2024-43898

Vulnerability identifier: #VU96533

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-2024-43898

CWE-ID: CWE-476

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 NULL pointer dereference within the ext4_da_do_write_end() function in fs/ext4/inode.c, within the __block_commit_write() function in fs/buffer.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

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External links
https://git.kernel.org/stable/c/3f6bbe6e07e5239294ecc3d2efa70d1f98aed52e
https://git.kernel.org/stable/c/f619876ccbfd329ae785fe5d3289b9dcd6eb5901
https://git.kernel.org/stable/c/83f4414b8f84249d538905825b088ff3ae555652

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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.