Double Free in net/packet/af_packet.c leading to priviledge escalation
A double free bug in packet_set_ring() in net/packet/af_packet.c can be exploited by a local user through crafted syscalls to escalate privileges or deny service. We recommend upgrading kernel past the effected versions or rebuilding past ec6af094ea28f0f2dda1a6a33b14cd57e36a9755
- Published
- Jan 26, 2022
- Updated
- Jun 16, 2026
- EPSS
- 6.5% · 94th percentile
- CWE
- CWE-415
Sign in to follow · You’ll be notified if a followed record enters KEV, gets an exploit or is updated.
Report tools
Action score
60
This week
Don’t wait for the next maintenance window.
- CVSS
- 28 / 40 · 7.0 / 10
- CISA KEV
- 30 / 30 · Listed
- EPSS
- 2 / 30 · 6.5%
CISA SSVC decision
- Exploitation
- active
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- 7.0
- CNA · Google
- 6.6
- 0.4 point gap
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:H
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Actively exploited in the wild
CISA added this to its Known Exploited Vulnerabilities catalog on Apr 11, 2022. That signals real attacks, not theory.
Remediation deadline for government agencies: May 2, 2022.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| netapp | 8300 firmware | cpe:2.3:o:netapp:8300_firmware |
| netapp | 8300 | cpe:2.3:h:netapp:8300 |
| netapp | 8700 firmware | cpe:2.3:o:netapp:8700_firmware |
| netapp | 8700 | cpe:2.3:h:netapp:8700 |
| netapp | a400 firmware | cpe:2.3:o:netapp:a400_firmware |
| netapp | a400 | cpe:2.3:h:netapp:a400 |
| netapp | c400 firmware | cpe:2.3:o:netapp:c400_firmware |
| netapp | c400 | cpe:2.3:h:netapp:c400 |
| netapp | h410c firmware | cpe:2.3:o:netapp:h410c_firmware |
| netapp | h410c | cpe:2.3:h:netapp:h410c |
| netapp | h300s firmware | cpe:2.3:o:netapp:h300s_firmware |
| netapp | h300s | cpe:2.3:h:netapp:h300s |
and 8 more
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 linux9.0
- linux linux kernel4.14.175 and later · before 4.14.259
- linux linux kernel4.19.114 and later · before 4.19.222
- linux linux kernel5.4.29 and later · before 5.4.168
- linux linux kernel5.11 and later · before 5.15.11
- linux linux kernel5.5.14 and later · before 5.10.88
- netapp 8300 firmwareall versions
- netapp 8700 firmwareall versions
- netapp a400 firmwareall versions
- netapp c400 firmwareall versions
- netapp h300s firmwareall versions
- netapp h410c firmwareall versions
- netapp h410s firmwareall versions
- netapp h500s firmwareall versions
- netapp h700s firmwareall versions
Versions reported by the vendor
Affected version ranges reported by the assigning authority (Google). Independent of NVD's CPE analysis and usually ahead of it.
Linux Kernel Kernel
- unspecified and later · before 5.4.168affected
- unspecified and later · before 5.10.88affected
- unspecified and later · before 5.15.11affected
- unspecified and later · before 5.16-rc6affected
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:10 | linux | before 4.19.232-1 | 4.19.232-1 |
| Debian:12 | linux | before 5.15.15-1 | 5.15.15-1 |
| Debian:9 | linux-4.19 | before 4.19.232-1~deb9u1 | 4.19.232-1~deb9u1 |
| openSUSE:Leap 15.3 | dtb-aarch64 | before 5.3.18-150300.59.49.1 | 5.3.18-150300.59.49.1 |
| openSUSE:Leap 15.3 | kernel-64kb | before 5.3.18-150300.59.49.1 | 5.3.18-150300.59.49.1 |
| openSUSE:Leap 15.3 | kernel-azure | before 5.3.18-150300.38.40.4 | 5.3.18-150300.38.40.4 |
| openSUSE:Leap 15.3 | kernel-debug | before 5.3.18-150300.59.49.1 | 5.3.18-150300.59.49.1 |
| openSUSE:Leap 15.3 | kernel-default | before 5.3.18-150300.59.49.1 | 5.3.18-150300.59.49.1 |
| openSUSE:Leap 15.3 | kernel-default-base | before 5.3.18-150300.59.49.1.150300.18.31.1 | 5.3.18-150300.59.49.1.150300.18.31.1 |
| openSUSE:Leap 15.3 | kernel-docs | before 5.3.18-150300.59.49.1 | 5.3.18-150300.59.49.1 |
| openSUSE:Leap 15.3 | kernel-kvmsmall | before 5.3.18-150300.59.49.1 | 5.3.18-150300.59.49.1 |
| openSUSE:Leap 15.3 | kernel-obs-build | before 5.3.18-150300.59.49.1 | 5.3.18-150300.59.49.1 |
| openSUSE:Leap 15.3 | kernel-obs-qa | before 5.3.18-150300.59.49.1 | 5.3.18-150300.59.49.1 |
| openSUSE:Leap 15.3 | kernel-preempt | before 5.3.18-150300.59.49.1 | 5.3.18-150300.59.49.1 |
| openSUSE:Leap 15.3 | kernel-source | before 5.3.18-150300.59.49.1 | 5.3.18-150300.59.49.1 |
| openSUSE:Leap 15.3 | kernel-source-azure | before 5.3.18-150300.38.40.4 | 5.3.18-150300.38.40.4 |
| openSUSE:Leap 15.3 | kernel-syms | before 5.3.18-150300.59.49.1 | 5.3.18-150300.59.49.1 |
| openSUSE:Leap 15.3 | kernel-syms-azure | before 5.3.18-150300.38.40.1 | 5.3.18-150300.38.40.1 |
| openSUSE:Leap 15.3 | kernel-zfcpdump | before 5.3.18-150300.59.49.1 | 5.3.18-150300.59.49.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP2-ESPOS | kernel-default-base | before 5.3.18-24.102.1.9.48.1 | 5.3.18-24.102.1.9.48.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP2-ESPOS | kernel-docs | before 5.3.18-24.102.1 | 5.3.18-24.102.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP2-ESPOS | kernel-obs-build | before 5.3.18-24.102.1 | 5.3.18-24.102.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP2-ESPOS | kernel-preempt | before 5.3.18-24.102.1 | 5.3.18-24.102.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP2-ESPOS | kernel-source | before 5.3.18-24.102.1 | 5.3.18-24.102.1 |
+50
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 | 5.15.15-1 · Debian:12 | Package registry (OSV) |
| debian:linux-4.19 | 4.19.232-1~deb9u1 · Debian:9 | Package registry (OSV) |
| opensuse:dtb-aarch64 | 5.3.18-150300.59.49.1 · openSUSE:Leap 15.3 | Package registry (OSV) |
| opensuse:kernel-64kb | 5.3.18-150300.59.49.1 · openSUSE:Leap 15.3 | Package registry (OSV) |
| opensuse:kernel-azure | 5.3.18-150300.38.40.4 · openSUSE:Leap 15.3 | Package registry (OSV) |
| opensuse:kernel-debug | 5.3.18-150300.59.49.1 · openSUSE:Leap 15.3 | Package registry (OSV) |
| opensuse:kernel-default | 5.3.18-150300.59.49.1 · openSUSE:Leap 15.3 | Package registry (OSV) |
| opensuse:kernel-default-base | 5.3.18-150300.59.49.1.150300.18.31.1 · openSUSE:Leap 15.3 | Package registry (OSV) |
| opensuse:kernel-docs | 5.3.18-150300.59.49.1 · openSUSE:Leap 15.3 | Package registry (OSV) |
| opensuse:kernel-kvmsmall | 5.3.18-150300.59.49.1 · openSUSE:Leap 15.3 | Package registry (OSV) |
| opensuse:kernel-obs-build | 5.3.18-150300.59.49.1 · openSUSE:Leap 15.3 | Package registry (OSV) |
| opensuse:kernel-obs-qa | 5.3.18-150300.59.49.1 · openSUSE:Leap 15.3 | Package registry (OSV) |
| opensuse:kernel-source-azure | 5.3.18-150300.38.40.4 · openSUSE:Leap 15.3 | Package registry (OSV) |
| opensuse:kernel-syms-azure | 5.3.18-150300.38.40.1 · openSUSE:Leap 15.3 | Package registry (OSV) |
| suse:kernel-64kb | 5.3.18-150300.59.49.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP3 | Package registry (OSV) |
| suse:kernel-azure | 5.3.18-150300.38.40.4 · SUSE:Linux Enterprise Module for Public Cloud 15 SP3 | Package registry (OSV) |
| suse:kernel-default | 5.3.18-24.102.1 · SUSE:Linux Enterprise Live Patching 15 SP2 | Package registry (OSV) |
| suse:kernel-default-base | 5.3.18-24.102.1.9.48.1 · SUSE:Linux Enterprise High Performance Computing 15 SP2-ESPOS | Package registry (OSV) |
| suse:kernel-docs | 5.3.18-24.102.1 · SUSE:Linux Enterprise High Performance Computing 15 SP2-ESPOS | Package registry (OSV) |
| suse:kernel-livepatch-SLE15-SP2_Update_24 | 1-5.3.1 · SUSE:Linux Enterprise Live Patching 15 SP2 | Package registry (OSV) |
| suse:kernel-obs-build | 5.3.18-24.102.1 · SUSE:Linux Enterprise High Performance Computing 15 SP2-ESPOS | Package registry (OSV) |
| suse:kernel-preempt | 5.3.18-24.102.1 · SUSE:Linux Enterprise High Performance Computing 15 SP2-ESPOS | Package registry (OSV) |
| suse:kernel-source | 5.3.18-24.102.1 · SUSE:Linux Enterprise High Performance Computing 15 SP2-ESPOS | Package registry (OSV) |
| suse:kernel-source-azure | 5.3.18-150300.38.40.4 · SUSE:Linux Enterprise Module for Public Cloud 15 SP3 | Package registry (OSV) |
| suse:kernel-syms | 5.3.18-24.102.1 · SUSE:Linux Enterprise High Performance Computing 15 SP2-ESPOS | Package registry (OSV) |
| suse:kernel-syms-azure | 5.3.18-150300.38.40.1 · SUSE:Linux Enterprise Module for Public Cloud 15 SP3 | Package registry (OSV) |
Exploit status
Weaponized
A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.
Evidence
- Proof-of-concept repository on GitHub ×2
Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.
| Source | Kind | Date |
|---|---|---|
| Proof-of-concept repository on GitHub | stars:1 | 2025-06-22 |
| Proof-of-concept repository on GitHub | stars:1 | 2025-09-17 |
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.
- Published
- CISA KEV+75 d
- First PoC+1243 d
- TodaySep 30, 2026+1708 d
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.
No credits in the CNA record.
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-415 · Double FreeCVSS 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.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; 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 helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=ec6af094ea28f0f2dda1a6a33b14cd57e36a9755
- lists.debian.org/debian-lts-announce/2022/03/msg00012.html
- security.netapp.com/advisory/ntap-20230110-0002/
- www.debian.org/security/2022/dsa-5096
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-22600
Vendor advisories and official records. Exploit/PoC links are deliberately left out.