CVE-2021-26930high
New! CVE Severity Now Using CVSS v3
The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.
Description
An issue was discovered in the Linux kernel 3.11 through 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.
References
http://xenbits.xen.org/xsa/advisory-365.html
https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html
https://lists.debian.org/debian-lts-announce/2021/03/msg00035.html
Details
Source: MITRE
Published: 2021-02-17
Updated: 2021-03-31
Type: NVD-CWE-noinfo
Risk Information
CVSS v2
Base Score: 4.6
Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P
Impact Score: 6.4
Exploitability Score: 3.9
Severity: MEDIUM
CVSS v3
Base Score: 7.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Impact Score: 5.9
Exploitability Score: 1.8
Severity: HIGH
Vulnerable Software
Configuration 1
OR
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from 3.11 to 5.10.16 (inclusive)
Configuration 2
OR
Configuration 3
OR
Tenable Plugins
| ID | Name | Product | Family | Severity |
|---|---|---|---|---|
| 149411 | Ubuntu 20.04 LTS / 20.10 : Linux kernel vulnerabilities (USN-4949-1) | Nessus | Ubuntu Local Security Checks | high |
| 149410 | Ubuntu 16.04 LTS / 18.04 LTS : Linux kernel vulnerabilities (USN-4946-1) | Nessus | Ubuntu Local Security Checks | medium |
| 149083 | SUSE SLES12 Security Update : kernel (SUSE-SU-2021:1373-1) | Nessus | SuSE Local Security Checks | high |
| 148700 | SUSE SLES12 Security Update : kernel (SUSE-SU-2021:1210-1) | Nessus | SuSE Local Security Checks | high |
| 148548 | Oracle Linux 7 / 8 : Unbreakable Enterprise kernel-container (ELSA-2021-9057) | Nessus | Oracle Linux Local Security Checks | high |
| 148546 | Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2021-9051) | Nessus | Oracle Linux Local Security Checks | high |
| 148509 | SUSE SLES12 Security Update : kernel (SUSE-SU-2021:1175-1) | Nessus | SuSE Local Security Checks | medium |
| 148498 | Ubuntu 16.04 LTS : Linux kernel vulnerabilities (USN-4904-1) | Nessus | Ubuntu Local Security Checks | medium |
| 148497 | Ubuntu 18.04 LTS / 20.04 LTS : Linux kernel vulnerabilities (USN-4909-1) | Nessus | Ubuntu Local Security Checks | high |
| 148350 | Photon OS 4.0: Linux PHSA-2021-4.0-0007 | Nessus | PhotonOS Local Security Checks | high |
| 148254 | Debian DLA-2610-1 : linux-4.19 security update | Nessus | Debian Local Security Checks | high |
| 148088 | Oracle Linux 7 : Unbreakable Enterprise kernel-container (ELSA-2021-9136) | Nessus | Oracle Linux Local Security Checks | high |
| 148036 | Oracle Linux 7 : Unbreakable Enterprise kernel (ELSA-2021-9135) | Nessus | Oracle Linux Local Security Checks | high |
| 147919 | Amazon Linux AMI : kernel (ALAS-2021-1487) | Nessus | Amazon Linux Local Security Checks | high |
| 147914 | Amazon Linux 2 : kernel (ALAS-2021-1616) | Nessus | Amazon Linux Local Security Checks | high |
| 147804 | Oracle Linux 7 : Unbreakable Enterprise kernel (ELSA-2021-9052) | Nessus | Oracle Linux Local Security Checks | high |
| 147597 | SUSE SLES12 Security Update : kernel (SUSE-SU-2021:0744-1) | Nessus | SuSE Local Security Checks | high |
| 147591 | SUSE SLES15 Security Update : kernel (SUSE-SU-2021:0735-1) | Nessus | SuSE Local Security Checks | high |
| 147586 | SUSE SLES15 Security Update : kernel (SUSE-SU-2021:0740-1) | Nessus | SuSE Local Security Checks | high |
| 147579 | SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2021:0741-1) | Nessus | SuSE Local Security Checks | high |
| 147568 | SUSE SLES12 Security Update : kernel (SUSE-SU-2021:0736-1) | Nessus | SuSE Local Security Checks | high |
| 147563 | openSUSE Security Update : the Linux Kernel (openSUSE-2021-393) | Nessus | SuSE Local Security Checks | high |
| 147544 | SUSE SLES12 Security Update : kernel (SUSE-SU-2021:0743-1) | Nessus | SuSE Local Security Checks | high |
| 147532 | Debian DLA-2586-1 : linux security update | Nessus | Debian Local Security Checks | high |
| 147464 | SUSE SLES15 Security Update : kernel (SUSE-SU-2021:0737-1) | Nessus | SuSE Local Security Checks | high |
| 147204 | Oracle Linux 7 / 8 : Unbreakable Enterprise kernel (ELSA-2021-9085) | Nessus | Oracle Linux Local Security Checks | high |
| 147203 | Oracle Linux 7 / 8 : Unbreakable Enterprise kernel-container (ELSA-2021-9086) | Nessus | Oracle Linux Local Security Checks | high |
| 147007 | Photon OS 1.0: Linux PHSA-2021-1.0-0366 | Nessus | PhotonOS Local Security Checks | high |
| 147000 | Photon OS 2.0: Linux PHSA-2021-2.0-0322 | Nessus | PhotonOS Local Security Checks | high |
| 146997 | Photon OS 3.0: Linux PHSA-2021-3.0-0201 | Nessus | PhotonOS Local Security Checks | high |
| 146993 | Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2021-9079) | Nessus | Oracle Linux Local Security Checks | high |
| 146905 | Fedora 33 : kernel (2021-7143aca8cb) | Nessus | Fedora Local Security Checks | high |
| 146894 | Fedora 32 : kernel (2021-8d45d297c6) | Nessus | Fedora Local Security Checks | high |
| 146588 | Oracle Linux 7 : Unbreakable Enterprise kernel (ELSA-2021-9067) | Nessus | Oracle Linux Local Security Checks | high |
| 146587 | Oracle Linux 7 : Unbreakable Enterprise kernel-container (ELSA-2021-9068) | Nessus | Oracle Linux Local Security Checks | high |
| 146549 | Oracle Linux 7 : Unbreakable Enterprise kernel-container (ELSA-2021-9058) | Nessus | Oracle Linux Local Security Checks | high |
| 146534 | Oracle Linux 7 / 8 : Unbreakable Enterprise kernel (ELSA-2021-9053) | Nessus | Oracle Linux Local Security Checks | high |