#VU93605 Resource management error in Linux kernel - CVE-2021-47360

Vulnerability identifier: #VU93605

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-2021-47360

CWE-ID: CWE-399

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 resource management error within the binder_deferred_fd_close(), binder_transaction_buffer_release(), binder_free_txn_fixups(), binder_free_buf(), binder_thread_write() and binder_cleanup_transaction() functions in drivers/android/binder.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

---

External links
https://git.kernel.org/stable/c/aa2c274c279ff365a06a4cba263f04965895166e
https://git.kernel.org/stable/c/d5b0473707fa53b03a5db0256ce62b2874bddbc7
https://git.kernel.org/stable/c/b95483d8d94b41fa31a84c1d86710b7907a37621
https://git.kernel.org/stable/c/5fdb55c1ac9585eb23bb2541d5819224429e103d

---

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.