#VU92424 Use of uninitialized resource in Linux kernel - CVE-2020-10732

Vulnerability identifier: #VU92424

Vulnerability risk: Low

CVSSv4.0: 1.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-10732

CWE-ID: CWE-908

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 read memory contents or crash the application.

The vulnerability exists due to use of uninitialized resource error within the fill_thread_core_info() function in fs/binfmt_elf.c. A local user can read memory contents or crash the application.

Mitigation
Install update from vendor's repository.

Vulnerable software versions

Linux kernel: All versions

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External links
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10732
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=aca969cacf07f41070d788ce2b8ca71f09d5207d
https://github.com/google/kmsan/issues/76
https://github.com/ruscur/linux/commit/a95cdec9fa0c08e6eeb410d461c03af8fd1fef0a
https://twitter.com/grsecurity/status/1252558055629299712
https://lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.html
https://lists.opensuse.org/opensuse-security-announce/2020-07/msg00008.html
https://usn.ubuntu.com/4411-1/
https://usn.ubuntu.com/4427-1/
https://usn.ubuntu.com/4439-1/
https://usn.ubuntu.com/4440-1/
https://usn.ubuntu.com/4485-1/
https://security.netapp.com/advisory/ntap-20210129-0005/
https://lore.kernel.org/lkml/CAG_fn=VZZ7yUxtOGzuTLkr7wmfXWtKK9BHHYawj=rt9XWnCYvg%40mail.gmail.com/

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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.