CVE-2022-23037
HIGH 7 ALL-YEARSLinux PV device frontends vulnerable to attacks by backends T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Several Linux PV device frontends are using the grant table interfaces for removing access rights of the backends in ways being subject to race conditions, resulting in potential data leaks, data corruption by malicious backends, and denial of service triggered by malicious backends: blkfront, netfront, scsifront and the gntalloc driver are testing whether a grant reference is still in use. If this is not the case, they assume that a following removal of the granted access will always succeed, which is not true in case the backend has mapped the granted page between those two operations. As a result the backend can keep access to the memory page of the guest no matter how the page will be used after the frontend I/O has finished. The xenbus driver has a similar problem, as it doesn't check the success of removing the granted access of a shared ring buffer. blkfront: CVE-2022-23036 netfront: CVE-2022-23037 scsifront: CVE-2022-23038 gntalloc: CVE-2022-23039 xenbus: CVE-2022-23040 blkfront, netfront, scsifront, usbfront, dmabuf, xenbus, 9p, kbdfront, and pvcalls are using a functionality to delay freeing a grant reference until it is no longer in use, but the freeing of the related data page is not synchronized with dropping the granted access. As a result the backend can keep access to the me
Severe if exploited (CVSS 7), but no confirmed exploitation. Patch on a normal cadence.
Exploitation likelihood
0.3%chance of exploitation in 30 days · 28th percentile
Impact if exploited
7CVSS 3.1 · HIGH · NVD
- ConfidentialityHigh
- IntegrityHigh
- AvailabilityHigh
What an attacker needs
- ⚠Access: Requires local access to the host
- ⚠Privileges: Requires a low-privilege account
- ✓User interaction: No user interaction needed
- ⚠Complexity: Needs a race window or specific setup
✓ lowers the bar for an attacker · ⚠ raises it
Proof of concept
No public PoC is currently catalogued.
Search for new PoCs
Search GitHub now — results may be empty or unverified.
Tracked sources are checked weekly for the full archive, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.
Weakness (CWE)
- CWE-362: Race condition
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
References and research data (JSON)
Vendor product assessments
All currently supported Red Hat products · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
Red Hat · CVE-2022-23037 · Updated 2026-01-13T21:56:59+00:00
Known Affected Software Configurations
| Vendor | Product | Version range |
|---|---|---|
| Xen | Xen | * |
| Debian | Debian Linux | 9.0 |
All CVSS metrics
- HIGH 7 v3.1 · NVD Primary
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H - MEDIUM 4.4 v2.0 · NVD Primary
AV:L/AC:M/Au:N/C:P/I:P/A:P
References
Advisories
- https://xenbits.xenproject.org/xsa/advisory-396.txt CVE record · XEN · Updated 2022-07-01T13:06:32.000Z
CVE record · CVE · Updated 2024-08-03T03:28:43.061Z
NVD · CVE-2022-23037 · Updated 2026-06-17T04:29:23.640 - https://lists.debian.org/debian-lts-announce/2022/07/msg00000.html CVE record · XEN · Updated 2022-07-01T13:06:32.000Z
CVE record · CVE · Updated 2024-08-03T03:28:43.061Z
NVD · CVE-2022-23037 · Updated 2026-06-17T04:29:23.640 - https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-23037.json Red Hat · CVE-2022-23037 · Updated 2026-01-13T21:56:59+00:00
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2022-28148 EUVD · EUVD-2022-28148
Technical & other
- https://access.redhat.com/security/cve/CVE-2022-23037 Red Hat · CVE-2022-23037 · Updated 2026-01-13T21:56:59+00:00
- https://www.cve.org/CVERecord?id=CVE-2022-23037 Red Hat · CVE-2022-23037 · Updated 2026-01-13T21:56:59+00:00
Sources: NVD · CVE.org · All sources and attribution · EPSS