PT-2021-8076 · Linux+2 · Linux Kernel+2

John David Anglin · Published 2021-12-20 · Updated 2024-08-13 · CVE-2021-46928

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description The issue is related to the parisc component of the Linux kernel, which improperly handles exception conditions. When a trap 7 (Instruction access rights) occurs, the CPU doesn't execute an instruction due to missing execute permissions on the memory region, resulting in a stale IIR value in the cr19 register. This can lead to random old stale values in trap 7 dumps. The estimated number of potentially affected devices worldwide is not available. There is no information about real-world incidents where this issue was exploited.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Improper Handling of Exceptional Conditions

Weakness Enumeration

CWE-755

Related Identifiers

BDU:2024-06305

CVE-2021-46928

OESA-2024-1392

OESA-2024-1393

Affected Products

Astra Linux

Linux Kernel

Red Os

References · 55

• https://git.kernel.org/stable/c/484730e5862f6b872dca13840bed40fd7c60fa26 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2021-46904 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2020-36777 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2023-52443 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-46928 · Security Note
• https://cve.org/CVERecord?id=CVE-2021-46928 · Security Note
• https://git.kernel.org/stable/c/e96373f0a5f484bc1e193f9951dcb3adf24bf3f7 · Patch
• https://osv.dev/vulnerability/OESA-2024-1393 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2024-1392 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-26606 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-46934 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2024-26622 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-46989 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-46924 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2023-52509 · Security Note