#VU103587 NULL pointer dereference in Linux kernel - CVE-2025-21682

Vulnerability identifier: #VU103587

Vulnerability risk: Low

CVSSv4.0: 1.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:U/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2025-21682

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 bnxt_xdp_set() function in drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c, within the bnxt_set_ring_params(), bnxt_set_rx_skb_mode() and bnxt_init_one() functions in drivers/net/ethernet/broadcom/bnxt/bnxt.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.12, 6.12.1, 6.12.2, 6.12.3, 6.12.4, 6.12.5, 6.12.6, 6.12.7, 6.12.8, 6.12.9, 6.12.10

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External links
https://git.kernel.org/stable/c/08831a894d18abfaabb5bbde7c2069a7fb41dd93
https://git.kernel.org/stable/c/f0aa6a37a3dbb40b272df5fc6db93c114688adcd
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12.11
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.13

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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.