What is CVE-2021-46928?

CVE-2021-46928 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10. CVE-2021-46928 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-46928?

CVE-2021-46928 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2021-46928?

No patch is currently available for CVE-2021-46928. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2021-46928 actively exploited?

CVE-2021-46928 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2021-46928

Medium

In the Linux kernel, the following vulnerability has been resolved: parisc: Clear stale IIR value on instruction access rights trap When a trap 7 (Instruction access rights) occurs, this means the CPU couldn't execute an instruction due to missing execute permissions on the memory region. In this case it seems the CPU didn't even fetched the instruction from memory and thus did not store it in the cr19 (IIR) register before calling the trap handler. So, the trap handler will find some random old stale value in cr19. This patch simply overwrites the stale IIR value with a constant magic "bad food" value (0xbaadf00d), in the hope people don't start to try to understand the various random IIR values in trap 7 dumps.

Package Linux Kernel

Published 2024-02-27

Last modified 2024-11-21

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness type

CWE-755

CVE-2021-46928 is classified as CWE-755

See CWE-755 on MITRE CWE for full details on this weakness type.

References

The following references provide additional information about CVE-2021-46928 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/484730e5862f6b872dca13840bed40fd7c60fa26
Patch
Kernel patch commit
https://git.kernel.org/stable/c/d01e9ce1af6116f812491d3d3873d204f10ae0b8
Patch
Kernel patch commit
https://git.kernel.org/stable/c/e96373f0a5f484bc1e193f9951dcb3adf24bf3f7
Patch

Details

CVE ID CVE-2021-46928

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-02-27

Modified 2024-11-21

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2021-46928?

CVE-2021-46928 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . CVE-2021-46928 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-46928?

CVE-2021-46928 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2021-46928?

No patch is currently available for CVE-2021-46928. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2021-46928 actively exploited?

No — CVE-2021-46928 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.