#VU90157 Use-after-free in Linux kernel - CVE-2024-35869

Vulnerability identifier: #VU90157

Vulnerability risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2024-35869

CWE-ID: CWE-416

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a use-after-free error within the tcon_info_alloc() and tconInfoFree() functions in fs/smb/client/misc.c, within the dfs_cache_remount_fs() function in fs/smb/client/dfs_cache.c, within the get_session(), __dfs_mount_share() and dfs_mount_share() functions in fs/smb/client/dfs.c, within the match_session(), cifs_get_smb_ses(), cifs_mount_put_conns() and cifs_mount() functions in fs/smb/client/connect.c. A remote non-authenticated attacker 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/645f332c6b63499cc76197f9b6bffcc659ba64cc
https://git.kernel.org/stable/c/e1db9ae87b7148c021daee1fcc4bc71b2ac58a79
https://git.kernel.org/stable/c/062a7f0ff46eb57aff526897bd2bebfdb1d3046a

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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.