Unity Linux 20.1050a Security Update: kernel (UTSA-2026-053200)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-053200 advisory. In the Linux kernel, the following vulnerability has been resolved: iouring: fix overflows checks in provide buffers Colin reported before possible overflow and sign...

loop_rw_iter in fs/io_uring.c in the Linux kernel 5.10 through 5.14.6 allows local users to gain privileges by using IORING_OP_PROVIDE_BUFFERS to trigger a free of a kernel buffer as demonstrated by using /proc/<pid>/maps for exploitation.

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AZL-6596 CVE-2021-41073 affecting package kernel for versions less than 5.10.78.1-1

looprwiter in fs/iouring.c in the Linux kernel 5.10 through 5.14.6 allows local users to gain privileges by using IORINGOPPROVIDEBUFFERS to trigger a free of a kernel buffer, as demonstrated by using /proc//maps for exploitation...

CVE-2021-3491

The iouring subsystem in the Linux kernel allowed the MAXRWCOUNT limit to be bypassed in the PROVIDEBUFFERS operation, which led to negative values being usedin memrw when reading /proc//mem. This could be used to create a heap overflow leading to arbitrary code execution in the kernel. It was...

CVE-2021-3491

The iouring subsystem in the Linux kernel allowed the MAXRWCOUNT limit to be bypassed in the PROVIDEBUFFERS operation, which led to negative values being usedin memrw when reading /proc//mem. This could be used to create a heap overflow leading to arbitrary code execution in the kernel. It was...

CVE-2021-3491

The iouring subsystem in the Linux kernel allowed the MAXRWCOUNT limit to be bypassed in the PROVIDEBUFFERS operation, which led to negative values being usedin memrw when reading /proc//mem. This could be used to create a heap overflow leading to arbitrary code execution in the kernel. It was...

CVE-2021-3491

CVE-2021-3491 concerns the Linux kernel io_uring PROVIDE_BUFFERS path, where the MAX_RW_COUNT limit could be bypassed, causing negative values to be used in mem_rw during /proc//mem reads. This could enable a heap overflow and potential arbitrary code execution in the kernel. The issue was addres...

CVE-2021-3491: Incorrect Calculation of Buffer Size

The iouring subsystem in the Linux kernel allowed the MAXRWCOUNT limit to be bypassed in the PROVIDEBUFFERS operation, which led to negative values being usedin memrw when reading /proc/ /mem. This could be used to create a heap overflow leading to arbitrary code execution in the kernel. It was...

CVE-2021-3491

A flaw was found in the Linux kernel. The iouring PROVIDEBUFFERS operation allowed the MAXRWCOUNT limit to be bypassed, which led to negative values being used in memrw when reading /proc//mem. The highest threat from this vulnerability is to data confidentiality and integrity as well as system...