Published: 17/02/2021 Updated: 25/03/2024

CVSS v2 Base Score: 4.6 | Impact Score: 6.4 | Exploitability Score: 3.9

CVSS v3 Base Score: 7.8 | Impact Score: 5.9 | Exploitability Score: 1.8

VMScore: 409

Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P

An issue exists in the Linux kernel 3.11 up to and including 5.10.16, as used by Xen. To service requests to the PV backend, the driver maps grant references provided by the frontend. In this process, errors may be encountered. In one case, an error encountered earlier might be discarded by later processing, resulting in the caller assuming successful mapping, and hence subsequent operations trying to access space that wasn't mapped. In another case, internal state would be insufficiently updated, preventing safe recovery from the error. This affects drivers/block/xen-blkback/blkback.c.

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linux linux kernel
fedoraproject fedora 32
fedoraproject fedora 33
debian debian linux 9.0

An issue was discovered in the Linux kernel 311 through 51016, as used by Xen To service requests to the PV backend, the driver maps grant references provided by the frontend In this process, errors may be encountered In one case, an error encountered earlier might be discarded by later processing, resulting in the caller assuming successful ...

A NULL pointer dereference flaw was found in the Linux kernel's GPU Nouveau driver functionality in the way the user calls ioctl DRM_IOCTL_NOUVEAU_CHANNEL_ALLOC This flaw allows a local user to crash the system (CVE-2020-25639) An issue was discovered in the Linux kernel 311 through 51016, as used by Xen To service requests to the PV backend, ...

An issue was discovered in the Linux kernel 311 through 51016, as used by Xen To service requests to the PV backend, the driver maps grant references provided by the frontend In this process, errors may be encountered In one case, an error encountered earlier might be discarded by later processing, resulting in the caller assuming successful ...

A security issue was found in the xen-blkback driver of the Linux kernel To service requests, the driver maps grant references provided by the frontend In this process, errors may be encountered In one case an error encountered earlier might be discarded by later processing, resulting in the caller assuming successful mapping, and hence subseque ...

Several security issues have been identified that, collectively, may allow privileged code running in a guest VM to cause the host to crash or to become unresponsiveThese issues have the following CVE identifiers: ...

NVD-CWE-noinfo http://xenbits.xen.org/xsa/advisory-365.html https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html https://security.netapp.com/advisory/ntap-20210326-0001/https://lists.debian.org/debian-lts-announce/2021/03/msg00035.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2XQR52ICKRK3GC4HDWLMWF2U55YGAR63/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GWQWPWYZRXVFJI5M3VCM72X27IB7CKOB/https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=871997bc9e423f05c7da7c9178e62dde5df2a7f8 https://nvd.nist.gov https://alas.aws.amazon.com/ALAS-2021-1487.html

CVE-2021-26930

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