Out-of-bounds read in Linux kernel fs

1) Out-of-bounds read

EUVDB-ID: #VU90364

Risk: Low

CVSSv4.0: 4.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-1508

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

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

The vulnerability exists due to an out-of-bounds read error within the io_read() and iov_iter_reexpand() functions in fs/io_uring.c. A local user can access sensitive information or perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:*:*:*:*:*:*:*:*

External links

https://access.redhat.com/security/cve/CVE-2022-1508
https://bugzilla.redhat.com/show_bug.cgi?id=2075533
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=89c2b3b74918200e46699338d7bcc19b1ea12110
https://ubuntu.com/security/CVE-2022-1508

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.