CVE-2021-26930

Scores

EPSS

0.000none0.0%
0%20%40%60%80%100%

Percentile: 0.0%

CVSS

7.8high3.x
0246810

CVSS Score: 7.8/10

All CVSS Scores

CVSS 3.x
7.8

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS 2.0
4.6

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

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.

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Sources

astradebiannvdubuntu

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Type: Configuration

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Trait:
{  "unaffected": true}

Source: astra

Type: Configuration

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Operating System: astra 1.7.1.8

Trait:
{  "unaffected": true}

Source: astra

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Product: linux

Operating System: astra 1.6.9

Trait:
{  "unaffected": true}

Source: astra

Type: Configuration

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Operating System: debian

Trait:
{  "fixed": "5.10.19-1"}

Source: debian

Type: Configuration

Product: linux

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Trait:
{  "fixed": "4.19.177-1"}

Source: debian

Type: Configuration

Product: linux

Operating System: ubuntu bionic 18.04

Trait:
{  "fixed": "4.15.0-143.147"}

Source: ubuntu

Type: Configuration

Product: linux

Operating System: ubuntu focal 20.04

Trait:
{  "fixed": "5.4.0-71.79"}

Source: ubuntu

Type: Configuration

Product: linux

Operating System: ubuntu groovy 20.10

Trait:
{  "fixed": "5.8.0-53.60"}

Source: ubuntu

Type: Configuration

Product: linux

Operating System: ubuntu hirsute 21.04

Trait:
{  "unaffected": true}

Source: ubuntu

Type: Configuration

Product: linux

Operating System: ubuntu impish 21.10

Trait:
{  "unaffected": true}

Source: ubuntu