CVEvulnerability
CVE-2021-28691
7.8 HIGH
Official page ↗
- Status
- Analyzed
- Published
- 2021-06-29
- Last modified
- 2026-08-26
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CVSS 2.0 ([email protected])
- 4.6 MEDIUM — AV:L/AC:L/Au:N/C:P/I:P/A:P
- Weaknesses
- CWE-416
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.
Affected configurations
• netapp solidfire baseboard management controller
• linux linux kernel (>= 5.5.0 < 5.10.43)
• netapp cloud backup
• netapp h410c firmware
• netapp h300s firmware
• netapp h500s firmware
• netapp h700s firmware
• netapp h300e firmware
• netapp h500e firmware
• netapp h700e firmware
• netapp h410s firmware
Related
Weakness · CWE (1)
- CWE-416 Use After Free weakness
References
- https://security.gentoo.org/glsa/202107-30 Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210805-0002/ Third Party Advisory
- https://xenbits.xenproject.org/xsa/advisory-374.txt Third Party Advisory
- https://security.gentoo.org/glsa/202107-30 Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210805-0002/ Third Party Advisory
- https://xenbits.xenproject.org/xsa/advisory-374.txt Third Party Advisory