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.

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-007221 advisory.

    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.

Tenable has extracted the preceding description block directly from the Unity Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2021-47040)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
306917	Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-007221)	Nessus	Unity Linux Local Security Checks	high
250174	Linux Distros Unpatched Vulnerability : CVE-2021-47040	Nessus	Misc.	high
202654	EulerOS Virtualization 2.10.1 : kernel (EulerOS-SA-2024-2002)	Nessus	Huawei Local Security Checks	high
195280	EulerOS 2.0 SP10 : kernel (EulerOS-SA-2024-1570)	Nessus	Huawei Local Security Checks	high
160459	Amazon Linux 2 : kernel, --advisory ALAS2KERNEL-5.10-2022-002 (ALASKERNEL-5.10-2022-002)	Nessus	Amazon Linux Local Security Checks	high

Detections

Analytics

CVE-2021-47040

high

Tenable Plugins

high

high

high

high

high