What is CVE-2021-47040?

CVE-2021-47040 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10. CVE-2021-47040 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47040?

CVE-2021-47040 has a CVSS score of 7.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2021-47040?

No patch is currently available for CVE-2021-47040. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2021-47040 actively exploited?

CVE-2021-47040 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2021-47040

High

In the Linux kernel, the following vulnerability has been resolved: io_uring: fix overflows checks in provide buffers Colin reported before possible overflow and sign extension problems in io_provide_buffers_prep(). As Linus pointed out previous attempt did nothing useful, see d81269fecb8ce ("io_uring: fix provide_buffers sign extension"). Do that with help of check_<op>_overflow helpers. And fix struct io_provide_buf::len type, as it doesn't make much sense to keep it signed.

Package Linux Kernel

Published 2024-02-28

Last modified 2025-01-09

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

7.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Weakness type

CWE-120

CVE-2021-47040 is classified as CWE-120

See CWE-120 on MITRE CWE for full details on this weakness type.

References

The following references provide additional information about CVE-2021-47040 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/38134ada0ceea3e848fe993263c0ff6207fd46e7
Patch
Kernel patch commit
https://git.kernel.org/stable/c/51bf90901952aaac564bbdb36b2b503050c53dd9
Patch
Kernel patch commit
https://git.kernel.org/stable/c/84b8c266c4bfe9ed5128e13253c388deb74b1b03
Patch

4 patch commits total View all on NVD

Details

CVE ID CVE-2021-47040

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2024-02-28

Modified 2025-01-09

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2021-47040?

CVE-2021-47040 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 . CVE-2021-47040 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47040?

CVE-2021-47040 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2021-47040?

No patch is currently available for CVE-2021-47040. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2021-47040 actively exploited?

No — CVE-2021-47040 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.