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CVE-2021-3638

CVE-2021-3638

This page contains facts from public vulnerability sources. Check the original advisory before updating.

An out-of-bounds memory access flaw was found in the ATI VGA device emulation of QEMU. This flaw occurs in the ati_2d_blt() routine while handling MMIO write operations when the guest provides invalid values for the destination display parameters. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service.

CVSS 6.5 · Medium · EPSS 0.4% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • qemu

    Versions
    • Affects qemu v4.0 to v6.1: Affected

    No fix published

  • qemu Debian:12

    Affected ranges
    • ECOSYSTEM: < 1:6.1+dfsg-6

    Update to 1:6.1+dfsg-6

  • qemu Debian:13

    Affected ranges
    • ECOSYSTEM: < 1:6.1+dfsg-6

    Update to 1:6.1+dfsg-6

  • qemu Debian:14

    Affected ranges
    • ECOSYSTEM: < 1:6.1+dfsg-6

    Update to 1:6.1+dfsg-6

  • qemu Ubuntu:20.04:LTS

    Versions
    • 1:4.0+dfsg-0ubuntu9
    • 1:4.0+dfsg-0ubuntu10
    • 1:4.2-1ubuntu1
    • 1:4.2-1ubuntu2
    • 1:4.2-3ubuntu1
    • 1:4.2-3ubuntu2
    • 1:4.2-3ubuntu3
    • 1:4.2-3ubuntu4
    • 1:4.2-3ubuntu5
    • 1:4.2-3ubuntu6
    • 1:4.2-3ubuntu6.1
    • 1:4.2-3ubuntu6.2
    • 1:4.2-3ubuntu6.3
    • 1:4.2-3ubuntu6.4
    • 1:4.2-3ubuntu6.5
    • 1:4.2-3ubuntu6.6
    • 1:4.2-3ubuntu6.7
    • 1:4.2-3ubuntu6.8
    • 1:4.2-3ubuntu6.9
    • 1:4.2-3ubuntu6.10
    • 1:4.2-3ubuntu6.11
    • 1:4.2-3ubuntu6.12
    • 1:4.2-3ubuntu6.14
    • 1:4.2-3ubuntu6.15
    • 1:4.2-3ubuntu6.16
    • 1:4.2-3ubuntu6.17
    • 1:4.2-3ubuntu6.18
    • 1:4.2-3ubuntu6.19
    • 1:4.2-3ubuntu6.21
    • 1:4.2-3ubuntu6.23
    • 1:4.2-3ubuntu6.24
    • 1:4.2-3ubuntu6.25
    • 1:4.2-3ubuntu6.26
    • 1:4.2-3ubuntu6.27
    Affected ranges
    • ECOSYSTEM: < 1:4.2-3ubuntu6.28

    Update to 1:4.2-3ubuntu6.28

Original sources

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