Linux PV device frontends vulnerable to attacks by backends T[his CNA information record relates to multiple CVEs; the text explains which a
Linux 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 memory page even after it has been freed and then re-used for a different purpose. CVE-2022-23041 netfront will fail a BUG_ON() assertion if it fails to revoke access in the rx path. This will result in a Denial of Service (DoS) situation of the guest which can be triggered by the backend. CVE-2022-23042
- Published
- Mar 10, 2022
- Updated
- Jun 17, 2026
- EPSS
- 0.4% · 28th percentile
- CWE
- CWE-362
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Report tools
Action score
28
Monitor
Low priority for now.
- CVSS
- 28 / 40 · 7.0 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.4%
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpAffected systems
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- debian debian linux9.0
- xen xenall versions
Versions reported by the vendor
Affected version ranges reported by the assigning authority (XEN). Independent of NVD's CPE analysis and usually ahead of it.
unspecified unspecified
- consult Xen advisory XSA-396unknown
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | linux | before 5.16.14-1 | 5.16.14-1 |
| openSUSE:Leap 15.3 | dtb-aarch64 | before 5.3.18-150300.59.60.4 | 5.3.18-150300.59.60.4 |
| openSUSE:Leap 15.3 | kernel-64kb | before 5.3.18-150300.59.60.4 | 5.3.18-150300.59.60.4 |
| openSUSE:Leap 15.3 | kernel-debug | before 4.12.14-150100.197.111.1 | 4.12.14-150100.197.111.1 |
| openSUSE:Leap 15.3 | kernel-debug | before 5.3.18-150300.59.60.4 | 5.3.18-150300.59.60.4 |
| openSUSE:Leap 15.3 | kernel-default | before 5.3.18-150300.59.60.4 | 5.3.18-150300.59.60.4 |
| openSUSE:Leap 15.3 | kernel-default-base | before 5.3.18-150300.59.60.4.150300.18.37.5 | 5.3.18-150300.59.60.4.150300.18.37.5 |
| openSUSE:Leap 15.3 | kernel-docs | before 5.3.18-150300.59.60.4 | 5.3.18-150300.59.60.4 |
| openSUSE:Leap 15.3 | kernel-kvmsmall | before 4.12.14-150100.197.111.1 | 4.12.14-150100.197.111.1 |
| openSUSE:Leap 15.3 | kernel-kvmsmall | before 5.3.18-150300.59.60.4 | 5.3.18-150300.59.60.4 |
| openSUSE:Leap 15.3 | kernel-obs-build | before 5.3.18-150300.59.60.4 | 5.3.18-150300.59.60.4 |
| openSUSE:Leap 15.3 | kernel-obs-qa | before 5.3.18-150300.59.60.4 | 5.3.18-150300.59.60.4 |
| openSUSE:Leap 15.3 | kernel-preempt | before 5.3.18-150300.59.60.4 | 5.3.18-150300.59.60.4 |
| openSUSE:Leap 15.3 | kernel-source | before 5.3.18-150300.59.60.4 | 5.3.18-150300.59.60.4 |
| openSUSE:Leap 15.3 | kernel-syms | before 5.3.18-150300.59.60.4 | 5.3.18-150300.59.60.4 |
| openSUSE:Leap 15.3 | kernel-vanilla | before 4.12.14-150100.197.111.1 | 4.12.14-150100.197.111.1 |
| openSUSE:Leap 15.3 | kernel-zfcpdump | before 5.3.18-150300.59.60.4 | 5.3.18-150300.59.60.4 |
| SUSE:HPE Helion OpenStack 8 | kernel-default | before 4.4.180-94.161.1 | 4.4.180-94.161.1 |
| SUSE:HPE Helion OpenStack 8 | kernel-source | before 4.4.180-94.161.1 | 4.4.180-94.161.1 |
| SUSE:HPE Helion OpenStack 8 | kernel-syms | before 4.4.180-94.161.1 | 4.4.180-94.161.1 |
| SUSE:HPE Helion OpenStack 8 | kgraft-patch-SLE12-SP3_Update_44 | before 1-4.5.1 | 1-4.5.1 |
| SUSE:Linux Enterprise High Availability Extension 12 SP5 | kernel-default | before 4.12.14-122.116.1 | 4.12.14-122.116.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP1-ESPOS | kernel-docs | before 4.12.14-150100.197.111.1 | 4.12.14-150100.197.111.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP1-ESPOS | kernel-docs | before 4.12.14-150100.197.111.1 | 4.12.14-150100.197.111.1 |
+71
Same product
xen: all recordsOther highest-scoring records for the same primary product.
- CVE-2017-10921The grant-table feature in Xen through 4.8.x does not ensure sufficient type counts for a GNTMAP_device_map and GNTMAP_host_map mapping, whi41Plan
- CVE-2017-10920The grant-table feature in Xen through 4.8.x mishandles a GNTMAP_device_map and GNTMAP_host_map mapping, when followed by only a GNTMAP_host41Plan
- CVE-2017-10918Xen through 4.8.x does not validate memory allocations during certain P2M operations, which allows guest OS users to obtain privileged host 41Plan
- CVE-2017-10912Xen through 4.8.x mishandles page transfer, which allows guest OS users to obtain privileged host OS access, aka XSA-217.41Plan
- CVE-2015-8104The KVM subsystem in the Linux kernel through 4.2.6, and Xen 4.3.x through 4.6.x, allows guest OS users to cause a denial of service (host O41Plan
- CVE-2015-5165The C+ mode offload emulation in the RTL8139 network card device model in QEMU, as used in Xen 4.5.x and earlier, allows remote attackers to41Plan
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:linux | 5.16.14-1 · Debian:12 | Package registry (OSV) |
| opensuse:kernel-azure | 5.3.18-150300.38.53.1 · openSUSE:Leap 15.3 | Package registry (OSV) |
| opensuse:kernel-source-azure | 5.3.18-150300.38.53.1 · openSUSE:Leap 15.3 | Package registry (OSV) |
| opensuse:kernel-syms-azure | 5.3.18-150300.38.53.1 · openSUSE:Leap 15.3 | Package registry (OSV) |
| suse:kernel-64kb | 5.3.18-150300.59.60.4 · SUSE:Linux Enterprise Module for Basesystem 15 SP3 | Package registry (OSV) |
| suse:kernel-azure | 5.3.18-150300.38.53.1 · SUSE:Linux Enterprise Module for Public Cloud 15 SP3 | Package registry (OSV) |
| suse:kernel-default | 4.12.14-150100.197.111.1 · SUSE:Linux Enterprise Live Patching 15 SP1 | Package registry (OSV) |
| suse:kernel-default | 5.3.18-150300.59.60.4 · SUSE:Linux Enterprise Module for Basesystem 15 SP3 | Package registry (OSV) |
| suse:kernel-default-base | 5.3.18-150300.59.60.4.150300.18.37.5 · SUSE:Linux Enterprise Module for Basesystem 15 SP3 | Package registry (OSV) |
| suse:kernel-docs | 4.12.14-150100.197.111.1 · SUSE:Linux Enterprise High Performance Computing 15 SP1-ESPOS | Package registry (OSV) |
| suse:kernel-docs | 5.3.18-150300.59.60.4 · SUSE:Linux Enterprise Module for Development Tools 15 SP3 | Package registry (OSV) |
| suse:kernel-livepatch-SLE15-SP1_Update_30 | 1-150100.3.3.1 · SUSE:Linux Enterprise Live Patching 15 SP1 | Package registry (OSV) |
| suse:kernel-obs-build | 4.12.14-150100.197.111.1 · SUSE:Linux Enterprise High Performance Computing 15 SP1-ESPOS | Package registry (OSV) |
| suse:kernel-obs-build | 5.3.18-150300.59.60.4 · SUSE:Linux Enterprise Module for Development Tools 15 SP3 | Package registry (OSV) |
| suse:kernel-preempt | 5.3.18-150300.59.60.4 · SUSE:Linux Enterprise Module for Basesystem 15 SP3 | Package registry (OSV) |
| suse:kernel-rt | 5.3.18-150300.82.1 · SUSE:Real Time Module 15 SP3 | Package registry (OSV) |
| suse:kernel-rt_debug | 5.3.18-150300.82.1 · SUSE:Real Time Module 15 SP3 | Package registry (OSV) |
| suse:kernel-source | 4.12.14-150100.197.111.1 · SUSE:Linux Enterprise High Performance Computing 15 SP1-ESPOS | Package registry (OSV) |
| suse:kernel-source | 5.3.18-150300.59.60.4 · SUSE:Linux Enterprise Module for Basesystem 15 SP3 | Package registry (OSV) |
| suse:kernel-source-azure | 5.3.18-150300.38.53.1 · SUSE:Linux Enterprise Module for Public Cloud 15 SP3 | Package registry (OSV) |
| suse:kernel-source-rt | 5.3.18-150300.82.1 · SUSE:Real Time Module 15 SP3 | Package registry (OSV) |
| suse:kernel-syms | 4.12.14-150100.197.111.1 · SUSE:Linux Enterprise High Performance Computing 15 SP1-ESPOS | Package registry (OSV) |
| suse:kernel-syms-azure | 5.3.18-150300.38.53.1 · SUSE:Linux Enterprise Module for Public Cloud 15 SP3 | Package registry (OSV) |
| suse:kernel-syms-rt | 5.3.18-150300.82.1 · SUSE:Real Time Module 15 SP3 | Package registry (OSV) |
| suse:kernel-zfcpdump | 5.3.18-150300.59.60.4 · SUSE:Linux Enterprise Module for Basesystem 15 SP3 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Someone with local access to the system can trigger it.
- A low-privileged account is enough.
- No user action is required.
- Special conditions such as timing or configuration are required.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Local
- Attack complexity
- High
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-362 · Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
ATT&CK techniques
—
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- lists.debian.org/debian-lts-announce/2022/07/msg00000.html
- xenbits.xenproject.org/xsa/advisory-396.txt
Vendor advisories and official records. Exploit/PoC links are deliberately left out.