Home CVE Database CVE-2021-26932

CVE-2021-26932

Description

An issue was discovered in the Linux kernel 3.2 through 5.10.16, as used by Xen. Grant mapping operations often occur in batch hypercalls, where a number of operations are done in a single hypercall, the success or failure of each one is reported to the backend driver, and the backend driver then loops over the results, performing follow-up actions based on the success or failure of each operation. Unfortunately, when running in PV mode, the Linux backend drivers mishandle this: Some errors are ignored, effectively implying their success from the success of related batch elements. In other cases, errors resulting from one batch element lead to further batch elements not being inspected, and hence successful ones to not be possible to properly unmap upon error recovery. Only systems with Linux backends running in PV mode are vulnerable. Linux backends run in HVM / PVH modes are not vulnerable. This affects arch/*/xen/p2m.c and drivers/xen/gntdev.c.

Priority: LOW
CVSS v3: 5.5
Publish Date: Feb 17, 2021
Related ID: --
CVSS v2: MEDIUM
Modified Date: Feb 17, 2021

Find out more about CVE-2021-26932 from the MITRE-CVE dictionary and NIST NVD


Products Affected

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Product Name Status Defect Fixed Downloads
Linux
Wind River Linux LTS 17 Fixed LIN10-8268
10.17.41.24 --
Wind River Linux 8 Legacy -- -- --
Wind River Linux 9 Legacy -- -- --
Wind River Linux 7 Legacy -- -- --
Wind River Linux LTS 21 Fixed -- 10.21.20.1 --
Wind River Linux LTS 18 Fixed LIN1018-7280
10.18.44.22 --
Wind River Linux LTS 19 Fixed LIN1019-6083
10.19.45.16 --
Wind River Linux CD release Fixed -- 10.21.13.0 --
VxWorks
VxWorks 7 Not Vulnerable -- -- --
VxWorks 6.9 Not Vulnerable -- -- --

Related Products

Product Name Status Defect Fixed Downloads

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