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.
Published: 2021-06-29
Score: 7.8 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
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Remediation

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Advisories
Source ID Title
EUVD EUVD EUVD-2021-15348 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.
Ubuntu USN Ubuntu USN USN-5015-1 Linux kernel (OEM) vulnerabilities
Ubuntu USN Ubuntu USN USN-5046-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-5050-1 Linux kernel vulnerabilities
History

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Subscriptions

Linux Linux Kernel
Netapp Cloud Backup H300e H300e Firmware H300s H300s Firmware H410c H410c Firmware H410s H410s Firmware H500e H500e Firmware H500s H500s Firmware H700e H700e Firmware H700s H700s Firmware
cve-icon MITRE

Status: PUBLISHED

Assigner: XEN

Published:

Updated: 2024-08-03T21:47:33.196Z

Reserved: 2021-03-18T00:00:00.000Z

Link: CVE-2021-28691

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2021-06-29T12:15:08.543

Modified: 2024-11-21T06:00:09.150

Link: CVE-2021-28691

cve-icon Redhat

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cve-icon OpenCVE Enrichment

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Weaknesses