CVE-2021-26934
published 2021-02-17CVE-2021-26934: An issue was discovered in the Linux kernel 4.18 through 5.10.16, as used by Xen. The backend allocation (aka be-alloc) mode of the drm_xen_front drivers was…
PriorityP337high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.35%
26.8th percentile
An issue was discovered in the Linux kernel 4.18 through 5.10.16, as used by Xen. The backend allocation (aka be-alloc) mode of the drm_xen_front drivers was not meant to be a supported configuration, but this wasn't stated accordingly in its support status entry.
Affected
20 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | — | — |
| fedoraproject | fedora | — | — |
| fedoraproject | fedora | — | — |
| linux | linux_kernel | 4.18 – 5.10.16 | — |
| msrc | kernel-5.10.57.1-1.cm1.aarch64.rpm_on_cbl_mariner_1.0_arm | — | — |
| msrc | kernel-5.10.57.1-1.cm1.x86_64.rpm_on_cbl_mariner_1.0_x64 | — | — |
| msrc | kernel-debuginfo-5.10.57.1-1.cm1.aarch64.rpm_on_cbl_mariner_1.0_arm | — | — |
| msrc | kernel-debuginfo-5.10.57.1-1.cm1.x86_64.rpm_on_cbl_mariner_1.0_x64 | — | — |
| msrc | kernel-devel-5.10.57.1-1.cm1.aarch64.rpm_on_cbl_mariner_1.0_arm | — | — |
| msrc | kernel-devel-5.10.57.1-1.cm1.x86_64.rpm_on_cbl_mariner_1.0_x64 | — | — |
| msrc | kernel-docs-5.10.57.1-1.cm1.aarch64.rpm_on_cbl_mariner_1.0_arm | — | — |
| msrc | kernel-docs-5.10.57.1-1.cm1.x86_64.rpm_on_cbl_mariner_1.0_x64 | — | — |
| msrc | kernel-drivers-accessibility-5.10.57.1-1.cm1.aarch64.rpm_on_cbl_mariner_1.0_arm | — | — |
| msrc | kernel-drivers-accessibility-5.10.57.1-1.cm1.x86_64.rpm_on_cbl_mariner_1.0_x64 | — | — |
| msrc | kernel-drivers-sound-5.10.57.1-1.cm1.aarch64.rpm_on_cbl_mariner_1.0_arm | — | — |
| msrc | kernel-drivers-sound-5.10.57.1-1.cm1.x86_64.rpm_on_cbl_mariner_1.0_x64 | — | — |
| msrc | kernel-dtb-5.10.57.1-1.cm1.aarch64.rpm_on_cbl_mariner_1.0_arm | — | — |
| msrc | kernel-oprofile-5.10.57.1-1.cm1.x86_64.rpm_on_cbl_mariner_1.0_x64 | — | — |
| msrc | kernel-tools-5.10.57.1-1.cm1.aarch64.rpm_on_cbl_mariner_1.0_arm | — | — |
| msrc | kernel-tools-5.10.57.1-1.cm1.x86_64.rpm_on_cbl_mariner_1.0_x64 | — | — |
CVSS provenance
nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
nvdv2.04.6MEDIUMAV:L/AC:L/Au:N/C:P/I:P/A:P
osv7.8HIGH
vendor_debian7.8LOW
vendor_msrc7.8HIGH
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
GHSA
GHSA-55gv-57w2-69r9: An issue was discovered in the Linux kernel 4
ghsa_unreviewed·2022-05-24
CVE-2021-26934 [HIGH] GHSA-55gv-57w2-69r9: An issue was discovered in the Linux kernel 4
An issue was discovered in the Linux kernel 4.18 through 5.10.16, as used by Xen. The backend allocation (aka be-alloc) mode of the drm_xen_front drivers was not meant to be a supported configuration, but this wasn't stated accordingly in its support status entry.
OSV
CVE-2021-26934: An issue was discovered in the Linux kernel 4
osv·2021-02-17·CVSS 7.8
CVE-2021-26934 [HIGH] CVE-2021-26934: An issue was discovered in the Linux kernel 4
An issue was discovered in the Linux kernel 4.18 through 5.10.16, as used by Xen. The backend allocation (aka be-alloc) mode of the drm_xen_front drivers was not meant to be a supported configuration, but this wasn't stated accordingly in its support status entry.
Microsoft
An issue was discovered in the Linux kernel 4.18 through 5.10.16 as used by Xen. The backend allocation (aka be-alloc) mode of the drm_xen_front drivers was not meant to be a supported configuration b
vendor_msrc·2021-02-09·CVSS 7.8
CVE-2021-26934 [HIGH] An issue was discovered in the Linux kernel 4.18 through 5.10.16 as used by Xen. The backend allocation (aka be-alloc) mode of the drm_xen_front drivers was not meant to be a supported configuration b
An issue was discovered in the Linux kernel 4.18 through 5.10.16 as used by Xen. The backend allocation (aka be-alloc) mode of the drm_xen_front drivers was not meant to be a supported configuration but this wasn't stated accordingly in its support status entry.
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If i
Debian
CVE-2021-26934: linux - An issue was discovered in the Linux kernel 4.18 through 5.10.16, as used by Xen...
vendor_debian·2021·CVSS 7.8
CVE-2021-26934 [HIGH] CVE-2021-26934: linux - An issue was discovered in the Linux kernel 4.18 through 5.10.16, as used by Xen...
An issue was discovered in the Linux kernel 4.18 through 5.10.16, as used by Xen. The backend allocation (aka be-alloc) mode of the drm_xen_front drivers was not meant to be a supported configuration, but this wasn't stated accordingly in its support status entry.
Scope: local
bookworm: open
bullseye: open
forky: open
sid: open
trixie: open
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
http://xenbits.xen.org/xsa/advisory-363.htmlhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4GELN5E6MDR5KQBJF5M5COUUED3YFZTD/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EOAJBVAVR6RSCUCHNXPVSNRPSFM7INMP/https://security.netapp.com/advisory/ntap-20210326-0001/http://xenbits.xen.org/xsa/advisory-363.htmlhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4GELN5E6MDR5KQBJF5M5COUUED3YFZTD/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EOAJBVAVR6RSCUCHNXPVSNRPSFM7INMP/https://security.netapp.com/advisory/ntap-20210326-0001/
2021-02-17
Published