CVE-2022-33742: Linux disk/nic frontends data leaks T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities c
Noroxi assessment
Priority: Monitor (action score 28/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 0.32% (FIRST EPSS).
- Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
- Fixed version: xen (Alpine:v3.13) 4.14.5-r3; xen (Alpine:v3.14) 4.15.3-r0; xen (Alpine:v3.16) 4.16.1-r3.
- Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).
Low priority for now. Upgrade to xen (Alpine:v3.13) 4.14.5-r3; xen (Alpine:v3.14) 4.15.3-r0; xen (Alpine:v3.16) 4.16.1-r3 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
Linux disk/nic frontends data leaks T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Linux Block and Network PV device frontends don't zero memory regions before sharing them with the backend (CVE-2022-26365, CVE-2022-33740). Additionally the granularity of the grant table doesn't allow sharing less than a 4K page, leading to unrelated data residing in the same 4K page as data shared with a backend being accessible by such backend (CVE-2022-33741, CVE-2022-33742).
- BDU:2022-04272
- DLA-3131-1
- DSA-5191-1
- SUSE-SU-2022:2377-1
- SUSE-SU-2022:2382-1
- SUSE-SU-2022:2393-1
- SUSE-SU-2022:2407-1
- SUSE-SU-2022:2411-1
- SUSE-SU-2022:2721-1
- SUSE-SU-2022:2741-1
- SUSE-SU-2022:2809-1
- SUSE-SU-2022:2840-1
- SUSE-SU-2022:2875-1
- SUSE-SU-2022:2875-2
- SUSE-SU-2022:2892-1
- SUSE-SU-2022:2892-2
- SUSE-SU-2022:3665-1
- SUSE-SU-2022:3728-1
- SUSE-SU-2022:3928-1
- Published
- Jul 5, 2022
- Updated
- Jun 17, 2026
- EPSS
- 0.3% · 25th percentile
- CWE
- CWE-200
Report tools
Action score
28
Monitor
Low priority for now.
- CVSS
- 28 / 40 · 7.1 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.3%
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
Running WordPress? Scan your site free with WP Lens
Noroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| linux | linux kernel | cpe:2.3:o:linux:linux_kernel |
| fedoraproject | fedora | cpe:2.3:o:fedoraproject:fedora |
| debian | debian linux | cpe:2.3:o:debian:debian_linux |
| xen | xen | cpe:2.3:o:xen:xen |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- debian debian linux10.0
- debian debian linux11.0
- fedoraproject fedora35
- fedoraproject fedora36
- linux linux kernel5.10 and later · before 5.10.129
- linux linux kernel5.15 and later · before 5.15.53
- linux linux kernel5.18 and later · before 5.18.10
- linux linux kernel5.4 and later · before 5.4.204
- linux linux kernel2.6.13 and later · before 4.9.322
- linux linux kernel4.14 and later · before 4.14.287
- linux linux kernel4.19 and later · before 4.19.251
- linux linux kernel2.6.12
- linux linux kernel5.19
- 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.
Linux Linux
- consult Xen advisory XSA-403unknown
Xen xen
- consult Xen advisory XSA-403unknown
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Alpine:v3.13 | xen | before 4.14.5-r3 | 4.14.5-r3 |
| Alpine:v3.14 | xen | before 4.15.3-r0 | 4.15.3-r0 |
| Alpine:v3.16 | xen | before 4.16.1-r3 | 4.16.1-r3 |
| Alpine:v3.17 | xen | before 4.16.1-r4 | 4.16.1-r4 |
| Debian:10 | linux | before 4.19.260-1 | 4.19.260-1 |
| Debian:11 | linux | before 5.10.127-2 | 5.10.127-2 |
| Debian:12 | linux | before 5.18.14-1 | 5.18.14-1 |
| Debian:12 | xen | before 4.16.2-1 | 4.16.2-1 |
| openSUSE:Leap 15.3 | dtb-aarch64 | before 5.3.18-150300.59.90.1 | 5.3.18-150300.59.90.1 |
| openSUSE:Leap 15.3 | kernel-64kb | before 5.3.18-150300.59.90.1 | 5.3.18-150300.59.90.1 |
| openSUSE:Leap 15.3 | kernel-azure | before 5.3.18-150300.38.75.1 | 5.3.18-150300.38.75.1 |
| openSUSE:Leap 15.3 | kernel-debug | before 4.12.14-150100.197.117.1 | 4.12.14-150100.197.117.1 |
| openSUSE:Leap 15.3 | kernel-debug | before 5.3.18-150300.59.90.1 | 5.3.18-150300.59.90.1 |
| openSUSE:Leap 15.3 | kernel-default | before 4.12.14-150100.197.117.1 | 4.12.14-150100.197.117.1 |
| openSUSE:Leap 15.3 | kernel-default | before 5.3.18-150300.59.90.1 | 5.3.18-150300.59.90.1 |
| openSUSE:Leap 15.3 | kernel-default-base | before 5.3.18-150300.59.90.1.150300.18.52.1 | 5.3.18-150300.59.90.1.150300.18.52.1 |
| openSUSE:Leap 15.3 | kernel-docs | before 5.3.18-150300.59.90.1 | 5.3.18-150300.59.90.1 |
| openSUSE:Leap 15.3 | kernel-kvmsmall | before 4.12.14-150100.197.117.1 | 4.12.14-150100.197.117.1 |
| openSUSE:Leap 15.3 | kernel-kvmsmall | before 5.3.18-150300.59.90.1 | 5.3.18-150300.59.90.1 |
| openSUSE:Leap 15.3 | kernel-obs-build | before 5.3.18-150300.59.90.1 | 5.3.18-150300.59.90.1 |
| openSUSE:Leap 15.3 | kernel-obs-qa | before 5.3.18-150300.59.90.1 | 5.3.18-150300.59.90.1 |
| openSUSE:Leap 15.3 | kernel-preempt | before 5.3.18-150300.59.90.1 | 5.3.18-150300.59.90.1 |
| openSUSE:Leap 15.3 | kernel-source | before 5.3.18-150300.59.90.1 | 5.3.18-150300.59.90.1 |
| openSUSE:Leap 15.3 | kernel-source-azure | before 5.3.18-150300.38.75.1 | 5.3.18-150300.38.75.1 |
+69
Same product
linux: all recordsOther highest-scoring records for the same primary product.
- CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV90Now
- CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV89Now
- CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV85Now
Published before and after this one in the same product
- ← EarlierCVE-2022-33740Jul 5, 2022 · Linux disk/nic frontends data leaks T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities c28Monitor
- ← EarlierCVE-2022-33741Jul 5, 2022 · Linux disk/nic frontends data leaks T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities c28Monitor
- Later →CVE-2022-33743Jul 5, 2022 · network backend may cause Linux netfront to use freed SKBs While adding logic to support XDP (eXpress Data Path), a code label was moved in 31Monitor
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 |
|---|---|---|
| alpine:xen | 4.14.5-r3 · Alpine:v3.13 | Package registry (OSV) |
| debian:linux | 5.18.14-1 · Debian:12 | Package registry (OSV) |
| debian:xen | 4.16.2-1 · Debian:12 | Package registry (OSV) |
| opensuse:dtb-aarch64 | 5.3.18-150300.59.90.1 · openSUSE:Leap 15.3 | Package registry (OSV) |
| opensuse:kernel-64kb | 5.3.18-150300.59.90.1 · openSUSE:Leap 15.3 | Package registry (OSV) |
| opensuse:kernel-azure | 5.3.18-150300.38.75.1 · openSUSE:Leap 15.3 | Package registry (OSV) |
| opensuse:kernel-debug | 4.12.14-150100.197.117.1 · openSUSE:Leap 15.3 | Package registry (OSV) |
| opensuse:kernel-default | 4.12.14-150100.197.117.1 · openSUSE:Leap 15.3 | Package registry (OSV) |
| opensuse:kernel-default-base | 5.3.18-150300.59.90.1.150300.18.52.1 · openSUSE:Leap 15.3 | Package registry (OSV) |
| opensuse:kernel-docs | 5.3.18-150300.59.90.1 · openSUSE:Leap 15.3 | Package registry (OSV) |
| opensuse:kernel-kvmsmall | 4.12.14-150100.197.117.1 · openSUSE:Leap 15.3 | Package registry (OSV) |
| opensuse:kernel-source-azure | 5.3.18-150300.38.75.1 · openSUSE:Leap 15.3 | Package registry (OSV) |
| opensuse:kernel-syms-azure | 5.3.18-150300.38.75.1 · openSUSE:Leap 15.3 | Package registry (OSV) |
| opensuse:kernel-vanilla | 4.12.14-150100.197.117.1 · openSUSE:Leap 15.3 | Package registry (OSV) |
| opensuse:kernel-zfcpdump | 4.12.14-150100.197.117.1 · openSUSE:Leap 15.3 | Package registry (OSV) |
| suse:kernel-azure | 4.12.14-16.103.1 · SUSE:Linux Enterprise Server 12 SP5 | Package registry (OSV) |
| suse:kernel-default | 4.12.14-122.127.1 · SUSE:Linux Enterprise High Availability Extension 12 SP5 | Package registry (OSV) |
| suse:kernel-default | 4.12.14-150100.197.117.1 · SUSE:Linux Enterprise Live Patching 15 SP1 | Package registry (OSV) |
| suse:kernel-docs | 4.12.14-122.127.1 · SUSE:Linux Enterprise Software Development Kit 12 SP5 | Package registry (OSV) |
| suse:kernel-docs | 4.12.14-150100.197.117.1 · SUSE:Linux Enterprise High Performance Computing 15 SP1-ESPOS | Package registry (OSV) |
| suse:kernel-livepatch-SLE15_Update_31 | 1-150000.1.3.1 · SUSE:Linux Enterprise Live Patching 15 | Package registry (OSV) |
| suse:kernel-livepatch-SLE15-SP1_Update_32 | 1-150100.3.3.1 · SUSE:Linux Enterprise Live Patching 15 SP1 | Package registry (OSV) |
| suse:kernel-obs-build | 4.12.14-122.127.1 · SUSE:Linux Enterprise Software Development Kit 12 SP5 | Package registry (OSV) |
| suse:kernel-obs-build | 4.12.14-150100.197.117.1 · SUSE:Linux Enterprise High Performance Computing 15 SP1-ESPOS | Package registry (OSV) |
| suse:kernel-source | 4.12.14-122.127.1 · SUSE:Linux Enterprise Server 12 SP5 | Package registry (OSV) |
| suse:kernel-source | 4.12.14-150100.197.117.1 · SUSE:Linux Enterprise High Performance Computing 15 SP1-ESPOS | Package registry (OSV) |
| suse:kernel-source-azure | 4.12.14-16.103.1 · SUSE:Linux Enterprise Server 12 SP5 | Package registry (OSV) |
| suse:kernel-syms | 4.12.14-122.127.1 · SUSE:Linux Enterprise Server 12 SP5 | Package registry (OSV) |
| suse:kernel-syms | 4.12.14-150100.197.117.1 · SUSE:Linux Enterprise High Performance Computing 15 SP1-ESPOS | Package registry (OSV) |
| suse:kernel-syms-azure | 4.12.14-16.103.1 · SUSE:Linux Enterprise Server 12 SP5 | Package registry (OSV) |
+4
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.
- Roger Pau MonnéCitri
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).
National notice (Türkiye Cybersecurity Directorate / USOM)
Official security notices citing this record; remediation advice is on the agency's page.
- TR-22-0651 · Oct 3, 2022(Linux Kernel Güvenlik Güncellemesi)
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.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-200 · Exposure of Sensitive Information to an Unauthorized ActorCVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
nvd-primary
Root cause
The extension requests broader permissions than its function needs and sends the data it collects out for purposes beyond its stated function.
The bug in code
The whole CWE-200 classA representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.
Vulnerable
{
"permissions": ["tabs", "<all_urls>"],
"background": { "service_worker": "analytics.js" }
}Fixed
{
"permissions": ["activeTab"],
"host_permissions": ["https://yildiz.example/*"]
}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)
- ExcavationCAPEC-116likelihood: High · Medium
- Subverting Environment Variable ValuesCAPEC-13likelihood: High · Very High
- FootprintingCAPEC-169likelihood: High · Very Low
- Exploiting Trust in ClientCAPEC-22likelihood: High · High
- FingerprintingCAPEC-224likelihood: High · Very Low
- ICMP Echo Request PingCAPEC-285likelihood: Medium · Low
- TCP SYN ScanCAPEC-287Low
- Enumerate Mail Exchange (MX) RecordsCAPEC-290Low
ATT&CK techniques
- System Service DiscoveryT1007
- System Network Configuration DiscoveryT1016
- Remote System DiscoveryT1018
- System Owner/User DiscoveryT1033
- Masquerading: Match Legitimate Name or LocationT1036.005
- Network Service ScanningT1046
- System Network Connections DiscoveryT1049
- Process DiscoveryT1057
- Permission Groups DiscoveryT1069
- System Information DiscoveryT1082
- File and Directory DiscoveryT1083
- Account DiscoveryT1087
- Multi-Factor Authentication InterceptionT1111
- Peripheral Device DiscoveryT1120
- System Time DiscoveryT1124
- Access Token Manipulation:Token Impersonation/TheftT1134.001
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (6 more)Show less
- xenbits.xen.org/xsa/advisory-403.html
- lists.debian.org/debian-lts-announce/2022/10/msg00000.html
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IGFTRZ66KQYTSYIRT5FRHF5D6O72NWOP/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RKRXZ4LHGCGMOG24ZCEJNY6R2BTS4S2Q/
- www.debian.org/security/2022/dsa-5191
- xenbits.xenproject.org/xsa/advisory-403.txt
Vendor advisories and official records. Exploit/PoC links are deliberately left out.