#VU90151 Use-after-free in Linux kernel - CVE-2024-35863

Vulnerability identifier: #VU90151

Vulnerability risk: Medium

CVSSv4.0: 4.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2024-35863

CWE-ID: CWE-416

Exploitation vector: Local network

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 is_valid_oplock_break() function in fs/smb/client/misc.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

---

External links
https://git.kernel.org/stable/c/494c91e1e9413b407d12166a61b84200d4d54fac
https://git.kernel.org/stable/c/0a15ba88a32fa7a516aff7ffd27befed5334dff2
https://git.kernel.org/stable/c/16d58c6a7db5050b9638669084b63fc05f951825
https://git.kernel.org/stable/c/69ccf040acddf33a3a85ec0f6b45ef84b0f7ec29

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.