CVE-2021-47040

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.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/38134ada0ceea3e848fe993263c0ff6207fd46e7	Patch
https://git.kernel.org/stable/c/51bf90901952aaac564bbdb36b2b503050c53dd9	Patch
https://git.kernel.org/stable/c/84b8c266c4bfe9ed5128e13253c388deb74b1b03	Patch
https://git.kernel.org/stable/c/cbbc13b115b8f18e0a714d89f87fbdc499acfe2d	Patch
https://git.kernel.org/stable/c/38134ada0ceea3e848fe993263c0ff6207fd46e7	Patch
https://git.kernel.org/stable/c/51bf90901952aaac564bbdb36b2b503050c53dd9	Patch
https://git.kernel.org/stable/c/84b8c266c4bfe9ed5128e13253c388deb74b1b03	Patch
https://git.kernel.org/stable/c/cbbc13b115b8f18e0a714d89f87fbdc499acfe2d	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

History

No history.

Information

Published : 2024-02-28 09:15

Updated : 2025-01-09 15:29

NVD link : CVE-2021-47040

Mitre link : CVE-2021-47040

CVE.ORG link : CVE-2021-47040

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-120

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

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