Memory leak in Linux kernel netfilter

1) Memory leak

EUVDB-ID: #VU90461

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-2024-27012

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

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

The vulnerability exists due to memory leak within the nft_rbtree_activate() and nft_rbtree_walk() functions in net/netfilter/nft_set_rbtree.c, within the nft_pipapo_activate() and nft_pipapo_walk() functions in net/netfilter/nft_set_pipapo.c, within the nft_rhash_activate(), nft_rhash_walk(), nft_hash_activate() and nft_hash_walk() functions in net/netfilter/nft_set_hash.c, within the nft_bitmap_activate() and nft_bitmap_walk() functions in net/netfilter/nft_set_bitmap.c, within the nft_mapelem_deactivate(), nft_map_catchall_deactivate(), nft_setelem_validate(), nf_tables_bind_check_setelem(), nft_mapelem_activate(), nft_map_catchall_activate(), nf_tables_dump_setelem(), nft_setelem_activate(), nft_setelem_flush() and nf_tables_loop_check_setelem() functions in net/netfilter/nf_tables_api.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

CPE2.3

External links

http://git.kernel.org/stable/c/86658fc7414d4b9e25c2699d751034537503d637
http://git.kernel.org/stable/c/e79b47a8615d42c68aaeb68971593333667382ed

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.