NULL pointer dereference in Linux kernel net phy driver

1) NULL pointer dereference

EUVDB-ID: #VU90511

Risk: Low

CVSSv3.1: 4.8 [AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-35891

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

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 lan8814_txtstamp(), lan8814_get_sig_rx(), lan8814_match_rx_ts(), lan8814_ptpci_adjfine(), lan8814_get_sig_tx(), lan8814_dequeue_tx_skb() and lan8814_match_skb() functions in drivers/net/phy/micrel.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

External links

http://git.kernel.org/stable/c/10608161696c2768f53426642f78a42bcaaa53e8
http://git.kernel.org/stable/c/95c1016a2d92c4c28a9d1b6d09859c00b19c0ea4
http://git.kernel.org/stable/c/49767b0df276f12e3e7184601e09ee7430e252dc
http://git.kernel.org/stable/c/96c155943a703f0655c0c4cab540f67055960e91

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.