CVE-2021-29631
Last modified
CVE-2021-29631 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. In FreeBSD 13.0-STABLE before n246941-20f96f215562, 12.2-STABLE before r370400, 11.4-STABLE before r370399, 13.0-RELEASE before p4, 12.2-RELEASE before p10, and 11.4-RELEASE before p13, certain VirtIO-based device models in bhyve failed to handle errors when fetching I/O descriptors. A malicious guest may cause the device model to operate on uninitialized I/O vectors leading to memory corruption, crashing of the bhyve process, and possibly arbitrary code execution in the bhyve process.. EPSS estimates a 0.29% chance of exploitation in the next 30 days.
Description
In FreeBSD 13.0-STABLE before n246941-20f96f215562, 12.2-STABLE before r370400, 11.4-STABLE before r370399, 13.0-RELEASE before p4, 12.2-RELEASE before p10, and 11.4-RELEASE before p13, certain VirtIO-based device models in bhyve failed to handle errors when fetching I/O descriptors. A malicious guest may cause the device model to operate on uninitialized I/O vectors leading to memory corruption, crashing of the bhyve process, and possibly arbitrary code execution in the bhyve process.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Freebsd | Freebsd | 11.4 |
| Freebsd | Freebsd | 12.2 |
| Freebsd | Freebsd | 13.0 |
References
- https://security.netapp.com/advisory/ntap-20210923-0004/Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210923-0004/Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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- CVE-2021-29626In FreeBSD 13.0-STABLE before n245117, 12.2-STABLE before r3…5.5
- CVE-2021-29627In FreeBSD 13.0-STABLE before n245050, 12.2-STABLE before r3…7.8
- CVE-2021-29628In FreeBSD 13.0-STABLE before n245764-876ffe28796c, 12.2-STA…7.5
- CVE-2021-29629In FreeBSD 13.0-STABLE before n245765-bec0d2c9c841, 12.2-STA…7.5
- CVE-2021-29630In FreeBSD 13.0-STABLE before n246938-0729ba2f49c9, 12.2-STA…8.1
- CVE-2021-29632In FreeBSD 13.0-STABLE before n247428-9352de39c3dc, 12.2-STA…7.5
- CVE-2021-29633Rejected reason: This candidate was in a CNA pool that was n…
- CVE-2021-29634Rejected reason: This candidate was in a CNA pool that was n…
- CVE-2021-29635Rejected reason: This candidate was in a CNA pool that was n…
- CVE-2021-29636Rejected reason: This candidate was in a CNA pool that was n…
- CVE-2021-29637Rejected reason: This candidate was in a CNA pool that was n…
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