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CVE-2021-3491

Description

The io_uring subsystem in the Linux kernel allowed the MAX_RW_COUNT limit to be bypassed in the PROVIDE_BUFFERS operation, which led to negative values being usedin mem_rw when reading /proc//mem. This could be used to create a heap overflow leading to arbitrary code execution in the kernel. It was addressed via commit d1f82808877b (io_uring: truncate lengths larger than MAX_RW_COUNT on provide buffers) (v5.13-rc1) and backported to the stable kernels in v5.12.4, v5.11.21, and v5.10.37. It was introduced in ddf0322db79c (io_uring: add IORING_OP_PROVIDE_BUFFERS) (v5.7-rc1).

Risk Information

Base Score
8.8
MODERATE
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
EPSS Score
Exploitation Probability
0.06

Associated Vulnerability

VulnerabilityOS Platform
Linux kernel for OEM systems (USN-4948-1) linux-image-oem-20.04b_5.10.0.1026.27_amd64.debLinux
Linux kernel for OEM systems (USN-4948-1) linux-image-5.10.0-1026-oem_5.10.0-1026.27_amd64.debLinux
SUSE-SU-2021:1887-1(SUSE Linux Enterprise Server 12-SP5 ) kernel-azure-4.12.14-16.59.1.x86_64.rpmLinux
SUSE-SU-2021:1887-1(SUSE Linux Enterprise Server 12-SP5 ) kernel-azure-base-4.12.14-16.59.1.x86_64.rpmLinux
SUSE-SU-2021:1887-1(SUSE Linux Enterprise Server 12-SP5 ) kernel-azure-base-debuginfo-4.12.14-16.59.1.x86_64.rpmLinux
SUSE-SU-2021:1887-1(SUSE Linux Enterprise Server 12-SP5 ) kernel-azure-debuginfo-4.12.14-16.59.1.x86_64.rpmLinux
SUSE-SU-2021:1887-1(SUSE Linux Enterprise Server 12-SP5 ) kernel-azure-debugsource-4.12.14-16.59.1.x86_64.rpmLinux
SUSE-SU-2021:1887-1(SUSE Linux Enterprise Server 12-SP5 ) kernel-azure-devel-4.12.14-16.59.1.x86_64.rpmLinux
SUSE-SU-2021:1887-1(SUSE Linux Enterprise Server 12-SP5 ) kernel-devel-azure-4.12.14-16.59.1.noarch.rpmLinux
SUSE-SU-2021:1887-1(SUSE Linux Enterprise Server 12-SP5 ) kernel-source-azure-4.12.14-16.59.1.noarch.rpmLinux
SUSE-SU-2021:1887-1(SUSE Linux Enterprise Server 12-SP5 ) kernel-syms-azure-4.12.14-16.59.1.x86_64.rpmLinux
Kernel-uek update (ELSA-2021-9486) kernel-uek-5.4.17-2136.300.7.el8uek.x86_64.rpmLinux
Kernel-uek-debug update (ELSA-2021-9486) kernel-uek-debug-5.4.17-2136.300.7.el8uek.x86_64.rpmLinux
Kernel-uek-debug-devel update (ELSA-2021-9486) kernel-uek-debug-devel-5.4.17-2136.300.7.el8uek.x86_64.rpmLinux
Kernel-uek-devel update (ELSA-2021-9486) kernel-uek-devel-5.4.17-2136.300.7.el8uek.x86_64.rpmLinux
Kernel-uek-doc update (ELSA-2021-9486) kernel-uek-doc-5.4.17-2136.300.7.el8uek.noarch.rpmLinux

Patch Details

No records found

References

https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234