#VU102939 Improper locking in Linux kernel - CVE-2024-55642

Vulnerability identifier: #VU102939

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-2024-55642

CWE-ID: CWE-667

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 locking within the BLK_ZONE_WPLUG_PLUGGED(), blkdev_report_zones(), disk_put_zone_wplug(), disk_should_remove_zone_wplug(), INIT_HLIST_NODE(), disk_zone_wplug_abort(), disk_zone_wplug_sync_wp_offset(), blk_zone_wplug_handle_reset_or_finish(), blk_zone_wplug_handle_reset_all(), blk_zone_wplug_prepare_bio(), blk_zone_wplug_handle_write(), disk_zone_wplug_unplug_bio(), blk_zone_write_plug_bio_endio(), blk_zone_wplug_bio_work(), disk_zone_wplugs_hash_size(), disk_free_zone_resources(), blk_revalidate_seq_zone() and blk_revalidate_disk_zones() functions in block/blk-zoned.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/7fa80134cf266325fa61139320091001c9b3c477
https://git.kernel.org/stable/c/fe0418eb9bd69a19a948b297c8de815e05f3cde1

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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.