CVE-2021-28691

HIGH

7.8

Description

Guest triggered use-after-free in Linux xen-netback A malicious or buggy network PV frontend can force Linux netback to disable the interface and terminate the receive kernel thread associated with queue 0 in response to the frontend sending a malformed packet. Such kernel thread termination will lead to a use-after-free in Linux netback when the backend is destroyed, as the kernel thread associated with queue 0 will have already exited and thus the call to kthread_stop will be performed against a stale pointer.

CVE Details

CVSS v3.1 Score7.8

SeverityHIGH

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

Attack VectorLOCAL

ComplexityLOW

Privileges RequiredLOW

User InteractionNONE

Published6/29/2021

Last Modified11/21/2024

Sourcenvd

Honeypot Sightings0

Affected Products

linux:linux_kernelnetapp:cloud_backupnetapp:h300enetapp:h300e_firmwarenetapp:h300snetapp:h300s_firmwarenetapp:h410cnetapp:h410c_firmwarenetapp:h410snetapp:h410s_firmwarenetapp:h500enetapp:h500e_firmwarenetapp:h500snetapp:h500s_firmwarenetapp:h700enetapp:h700e_firmwarenetapp:h700snetapp:h700s_firmware

Weaknesses (CWE)

CWE-416

References

https://security.gentoo.org/glsa/202107-30(security@xen.org)

https://security.netapp.com/advisory/ntap-20210805-0002/(security@xen.org)

https://xenbits.xenproject.org/xsa/advisory-374.txt(security@xen.org)

https://security.gentoo.org/glsa/202107-30(af854a3a-2127-422b-91ae-364da2661108)

https://security.netapp.com/advisory/ntap-20210805-0002/(af854a3a-2127-422b-91ae-364da2661108)

https://xenbits.xenproject.org/xsa/advisory-374.txt(af854a3a-2127-422b-91ae-364da2661108)

IOC Correlations

No correlations recorded

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