CVE-2021-45464

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2023-04-15 · updated 2026-06-17
Weakness: CWE-787

Description

kvmtool through 39181fc allows an out-of-bounds write, related to virtio/balloon.c and virtio/pci.c. This allows a guest OS user to execute arbitrary code on the host machine.

Affected products

Kvmtool Project Kvmtool: all versions

References

https://cdn.discordapp.com/attachments/921419715170164776/921882173517230100/exploit.c
https://git.kernel.org/pub/scm/linux/kernel/git/will/kvmtool.git/commit/?id=39181fc6429f4e9e71473284940e35857b42772a
https://git.kernel.org/pub/scm/linux/kernel/git/will/kvmtool.git/log/
https://www.kalmarunionen.dk/writeups/2021/hxp-2021/lkvm/
https://cdn.discordapp.com/attachments/921419715170164776/921882173517230100/exploit.c
https://git.kernel.org/pub/scm/linux/kernel/git/will/kvmtool.git/commit/?id=39181fc6429f4e9e71473284940e35857b42772a
https://git.kernel.org/pub/scm/linux/kernel/git/will/kvmtool.git/log/
https://www.kalmarunionen.dk/writeups/2021/hxp-2021/lkvm/

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