VulnerabilityModified
CVE-2021-45464
kvmtool through 39181fc allows an out-of-bounds write, related to virtio/balloon.c and virtio/pci.c.
HIGH 8.8EPSS 0.38%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.38%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- EPSS
- 0.38% probability · 32th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- kvmtool project/kvmtool
- Source
- cve@mitre.org
References
- https://cdn.discordapp.com/attachments/921419715170164776/921882173517230100/exploit.cBroken Link
- https://git.kernel.org/pub/scm/linux/kernel/git/will/kvmtool.git/commit/?id=39181fc6429f4e9e71473284940e35857b42772aPatch
- https://git.kernel.org/pub/scm/linux/kernel/git/will/kvmtool.git/log/Patch
- https://www.kalmarunionen.dk/writeups/2021/hxp-2021/lkvm/Exploit, Third Party Advisory
- https://cdn.discordapp.com/attachments/921419715170164776/921882173517230100/exploit.cBroken Link
- https://git.kernel.org/pub/scm/linux/kernel/git/will/kvmtool.git/commit/?id=39181fc6429f4e9e71473284940e35857b42772aPatch
- https://git.kernel.org/pub/scm/linux/kernel/git/will/kvmtool.git/log/Patch
- https://www.kalmarunionen.dk/writeups/2021/hxp-2021/lkvm/Exploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.