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
Noroxi assessment
Priority: Monitor (action score 31/100)
- 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: 0.35% (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: bpftool (AlmaLinux:9) 7.0.0-284.11.1.el9_2; kernel (AlmaLinux:9) 5.14.0-284.11.1.el9_2; kernel-64k (AlmaLinux:9) 5.14.0-284.11.1.el9_2.
- Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).
Low priority for now. Upgrade to bpftool (AlmaLinux:9) 7.0.0-284.11.1.el9_2; kernel (AlmaLinux:9) 5.14.0-284.11.1.el9_2; kernel-64k (AlmaLinux:9) 5.14.0-284.11.1.el9_2 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
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 a way allowing for SKBs having references (pointers) retained for further processing to nevertheless be freed.
- Published
- Jul 5, 2022
- Updated
- Jun 17, 2026
- EPSS
- 0.3% · 27th percentile
- CWE
- —
Report tools
Action score
31
Monitor
Low priority for now.
- CVSS
- 31 / 40 · 7.8 / 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.
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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 |
| xen | xen | cpe:2.3:o:xen:xen |
| debian | debian linux | cpe:2.3:o:debian:debian_linux |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- debian debian linux11.0
- linux linux kernel5.9 and later · up to 5.18 inclusive
- 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-405unknown
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| AlmaLinux:9 | bpftool | before 7.0.0-284.11.1.el9_2 | 7.0.0-284.11.1.el9_2 |
| AlmaLinux:9 | kernel | before 5.14.0-284.11.1.el9_2 | 5.14.0-284.11.1.el9_2 |
| AlmaLinux:9 | kernel-64k | before 5.14.0-284.11.1.el9_2 | 5.14.0-284.11.1.el9_2 |
| AlmaLinux:9 | kernel-64k-core | before 5.14.0-284.11.1.el9_2 | 5.14.0-284.11.1.el9_2 |
| AlmaLinux:9 | kernel-64k-debug | before 5.14.0-284.11.1.el9_2 | 5.14.0-284.11.1.el9_2 |
| AlmaLinux:9 | kernel-64k-debug-core | before 5.14.0-284.11.1.el9_2 | 5.14.0-284.11.1.el9_2 |
| AlmaLinux:9 | kernel-64k-debug-devel | before 5.14.0-284.11.1.el9_2 | 5.14.0-284.11.1.el9_2 |
| AlmaLinux:9 | kernel-64k-debug-devel-matched | before 5.14.0-284.11.1.el9_2 | 5.14.0-284.11.1.el9_2 |
| AlmaLinux:9 | kernel-64k-debug-modules | before 5.14.0-284.11.1.el9_2 | 5.14.0-284.11.1.el9_2 |
| AlmaLinux:9 | kernel-64k-debug-modules-core | before 5.14.0-284.11.1.el9_2 | 5.14.0-284.11.1.el9_2 |
| AlmaLinux:9 | kernel-64k-debug-modules-extra | before 5.14.0-284.11.1.el9_2 | 5.14.0-284.11.1.el9_2 |
| AlmaLinux:9 | kernel-64k-devel | before 5.14.0-284.11.1.el9_2 | 5.14.0-284.11.1.el9_2 |
| AlmaLinux:9 | kernel-64k-devel-matched | before 5.14.0-284.11.1.el9_2 | 5.14.0-284.11.1.el9_2 |
| AlmaLinux:9 | kernel-64k-modules | before 5.14.0-284.11.1.el9_2 | 5.14.0-284.11.1.el9_2 |
| AlmaLinux:9 | kernel-64k-modules-core | before 5.14.0-284.11.1.el9_2 | 5.14.0-284.11.1.el9_2 |
| AlmaLinux:9 | kernel-64k-modules-extra | before 5.14.0-284.11.1.el9_2 | 5.14.0-284.11.1.el9_2 |
| AlmaLinux:9 | kernel-abi-stablelists | before 5.14.0-284.11.1.el9_2 | 5.14.0-284.11.1.el9_2 |
| AlmaLinux:9 | kernel-core | before 5.14.0-284.11.1.el9_2 | 5.14.0-284.11.1.el9_2 |
| AlmaLinux:9 | kernel-cross-headers | before 5.14.0-284.11.1.el9_2 | 5.14.0-284.11.1.el9_2 |
| AlmaLinux:9 | kernel-debug | before 5.14.0-284.11.1.el9_2 | 5.14.0-284.11.1.el9_2 |
| AlmaLinux:9 | kernel-debug-core | before 5.14.0-284.11.1.el9_2 | 5.14.0-284.11.1.el9_2 |
| AlmaLinux:9 | kernel-debug-devel | before 5.14.0-284.11.1.el9_2 | 5.14.0-284.11.1.el9_2 |
| AlmaLinux:9 | kernel-debug-devel-matched | before 5.14.0-284.11.1.el9_2 | 5.14.0-284.11.1.el9_2 |
| AlmaLinux:9 | kernel-debug-modules | before 5.14.0-284.11.1.el9_2 | 5.14.0-284.11.1.el9_2 |
+96
Same product
linux: all recordsOther highest-scoring records for the same primary product.
- 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
- CVE-2016-5195Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect haKEV83Now
Published before and after this one in the same product
- ← 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
- ← EarlierCVE-2022-33742Jul 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-2022-33744Jul 5, 2022 · Arm guests can cause Dom0 DoS via PV devices When mapping pages of guests on Arm, dom0 is using an rbtree to keep track of the foreign mappi18Monitor
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 |
|---|---|---|
| almalinux:kernel-rt | 5.14.0-284.11.1.rt14.296.el9_2 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-rt-core | 5.14.0-284.11.1.rt14.296.el9_2 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-rt-debug | 5.14.0-284.11.1.rt14.296.el9_2 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-rt-debug-core | 5.14.0-284.11.1.rt14.296.el9_2 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-rt-debug-devel | 5.14.0-284.11.1.rt14.296.el9_2 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-rt-debug-kvm | 5.14.0-284.11.1.rt14.296.el9_2 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-rt-debug-modules | 5.14.0-284.11.1.rt14.296.el9_2 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-rt-debug-modules-core | 5.14.0-284.11.1.rt14.296.el9_2 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-rt-debug-modules-extra | 5.14.0-284.11.1.rt14.296.el9_2 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-rt-devel | 5.14.0-284.11.1.rt14.296.el9_2 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-rt-kvm | 5.14.0-284.11.1.rt14.296.el9_2 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:kernel-rt-modules | 5.14.0-284.11.1.rt14.296.el9_2 · AlmaLinux:9 | Package registry (OSV) |
| alpine:xen | 4.15.4-r0 · Alpine:v3.14 | Package registry (OSV) |
| debian:linux | 5.18.14-1 · Debian:12 | Package registry (OSV) |
| red hat:kernel-rt | 0:5.14.0-284.11.1.rt14.296.el9_2 · Red Hat:enterprise_linux:9::nfv | Package registry (OSV) |
| red hat:kernel-rt-core | 0:5.14.0-284.11.1.rt14.296.el9_2 · Red Hat:enterprise_linux:9::nfv | Package registry (OSV) |
| red hat:kernel-rt-debug | 0:5.14.0-284.11.1.rt14.296.el9_2 · Red Hat:enterprise_linux:9::nfv | Package registry (OSV) |
| red hat:kernel-rt-debug-core | 0:5.14.0-284.11.1.rt14.296.el9_2 · Red Hat:enterprise_linux:9::nfv | Package registry (OSV) |
| red hat:kernel-rt-debug-debuginfo | 0:5.14.0-284.11.1.rt14.296.el9_2 · Red Hat:enterprise_linux:9::nfv | Package registry (OSV) |
| red hat:kernel-rt-debug-devel | 0:5.14.0-284.11.1.rt14.296.el9_2 · Red Hat:enterprise_linux:9::nfv | Package registry (OSV) |
| red hat:kernel-rt-debug-kvm | 0:5.14.0-284.11.1.rt14.296.el9_2 · Red Hat:enterprise_linux:9::nfv | Package registry (OSV) |
| red hat:kernel-rt-debug-modules | 0:5.14.0-284.11.1.rt14.296.el9_2 · Red Hat:enterprise_linux:9::nfv | Package registry (OSV) |
| red hat:kernel-rt-debug-modules-core | 0:5.14.0-284.11.1.rt14.296.el9_2 · Red Hat:enterprise_linux:9::nfv | Package registry (OSV) |
| red hat:kernel-rt-debug-modules-extra | 0:5.14.0-284.11.1.rt14.296.el9_2 · Red Hat:enterprise_linux:9::nfv | Package registry (OSV) |
| red hat:kernel-rt-debuginfo | 0:5.14.0-284.11.1.rt14.296.el9_2 · Red Hat:enterprise_linux:9::nfv | Package registry (OSV) |
| red hat:kernel-rt-debuginfo-common-x86_64 | 0:5.14.0-284.11.1.rt14.296.el9_2 · Red Hat:enterprise_linux:9::nfv | Package registry (OSV) |
| suse:kernel-livepatch-SLE15-SP4_Update_0 | 4-150400.4.9.3 · SUSE:Linux Enterprise Live Patching 15 SP4 | 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.
- Jan BeulichSUSE.'}]}}}
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
- high · data or configuration can be modified
- 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
- High
- Availability impact
- High
Weakness class (CWE)
—
CVSS vector
CVSS:3.1/AV:L/AC:L/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.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (3 more)Show less
Vendor advisories and official records. Exploit/PoC links are deliberately left out.