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CVE-2022-3524· NVD / CVE Program· CNA VulDB

Linux Kernel IPv6 ipv6_renew_options memory leak

Noroxi assessment

Priority: Monitor (action score 22/100)

  • 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: 1% (FIRST EPSS); higher than 64.7% of all records.
  • 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:8) 4.18.0-477.10.1.el8_8; kernel (AlmaLinux:8) 4.18.0-477.10.1.el8_8; kernel-abi-stablelists (AlmaLinux:8) 4.18.0-477.10.1.el8_8.
  • Mentioned 2 times in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to bpftool (AlmaLinux:8) 4.18.0-477.10.1.el8_8; kernel (AlmaLinux:8) 4.18.0-477.10.1.el8_8; kernel-abi-stablelists (AlmaLinux:8) 4.18.0-477.10.1.el8_8 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

A vulnerability was found in Linux Kernel. It has been declared as problematic. Affected by this vulnerability is the function ipv6_renew_options of the component IPv6 Handler. The manipulation leads to memory leak. The attack can be launched remotely. It is recommended to apply a patch to fix this issue. The identifier VDB-211021 was assigned to this vulnerability.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Oct 16, 2022
Updated
Oct 14, 2026
EPSS
1.0% · 64th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.0%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
5.5
CNA · VulDB
4.3
1.2 point gap

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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.

Follow CVE-2022-3524

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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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.

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Affected 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.

VendorProduct
linuxlinux kernel
debiandebian linux

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
  • linux linux kernelbefore 2.6.12
  • linux linux kernel2.6.12

Versions reported by the vendor

Affected version ranges reported by the assigning authority (VulDB). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Kernel

    • n/aaffected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:8bpftoolbefore 4.18.0-477.10.1.el8_84.18.0-477.10.1.el8_8
AlmaLinux:8kernelbefore 4.18.0-477.10.1.el8_84.18.0-477.10.1.el8_8
AlmaLinux:8kernel-abi-stablelistsbefore 4.18.0-477.10.1.el8_84.18.0-477.10.1.el8_8
AlmaLinux:8kernel-corebefore 4.18.0-477.10.1.el8_84.18.0-477.10.1.el8_8
AlmaLinux:8kernel-cross-headersbefore 4.18.0-477.10.1.el8_84.18.0-477.10.1.el8_8
AlmaLinux:8kernel-debugbefore 4.18.0-477.10.1.el8_84.18.0-477.10.1.el8_8
AlmaLinux:8kernel-debug-corebefore 4.18.0-477.10.1.el8_84.18.0-477.10.1.el8_8
AlmaLinux:8kernel-debug-develbefore 4.18.0-477.10.1.el8_84.18.0-477.10.1.el8_8
AlmaLinux:8kernel-debug-modulesbefore 4.18.0-477.10.1.el8_84.18.0-477.10.1.el8_8
AlmaLinux:8kernel-debug-modules-extrabefore 4.18.0-477.10.1.el8_84.18.0-477.10.1.el8_8
AlmaLinux:8kernel-develbefore 4.18.0-477.10.1.el8_84.18.0-477.10.1.el8_8
AlmaLinux:8kernel-docbefore 4.18.0-477.10.1.el8_84.18.0-477.10.1.el8_8
AlmaLinux:8kernel-modulesbefore 4.18.0-477.10.1.el8_84.18.0-477.10.1.el8_8
AlmaLinux:8kernel-modules-extrabefore 4.18.0-477.10.1.el8_84.18.0-477.10.1.el8_8
AlmaLinux:8kernel-rtbefore 4.18.0-477.10.1.rt7.274.el8_84.18.0-477.10.1.rt7.274.el8_8
AlmaLinux:8kernel-rt-corebefore 4.18.0-477.10.1.rt7.274.el8_84.18.0-477.10.1.rt7.274.el8_8
AlmaLinux:8kernel-rt-debugbefore 4.18.0-477.10.1.rt7.274.el8_84.18.0-477.10.1.rt7.274.el8_8
AlmaLinux:8kernel-rt-debug-corebefore 4.18.0-477.10.1.rt7.274.el8_84.18.0-477.10.1.rt7.274.el8_8
AlmaLinux:8kernel-rt-debug-develbefore 4.18.0-477.10.1.rt7.274.el8_84.18.0-477.10.1.rt7.274.el8_8
AlmaLinux:8kernel-rt-debug-kvmbefore 4.18.0-477.10.1.rt7.274.el8_84.18.0-477.10.1.rt7.274.el8_8
AlmaLinux:8kernel-rt-debug-modulesbefore 4.18.0-477.10.1.rt7.274.el8_84.18.0-477.10.1.rt7.274.el8_8
AlmaLinux:8kernel-rt-debug-modules-extrabefore 4.18.0-477.10.1.rt7.274.el8_84.18.0-477.10.1.rt7.274.el8_8
AlmaLinux:8kernel-rt-develbefore 4.18.0-477.10.1.rt7.274.el8_84.18.0-477.10.1.rt7.274.el8_8
AlmaLinux:8kernel-rt-kvmbefore 4.18.0-477.10.1.rt7.274.el8_84.18.0-477.10.1.rt7.274.el8_8

+96

Same product

linux: all records

Other 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 KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now
  • 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 haKEV
    83Now

Published before and after this one in the same product

  • ← EarlierCVE-2022-3523Oct 16, 2022 · Linux Kernel Driver memory.c use after free
    21Monitor
  • ← EarlierCVE-2022-3521Oct 16, 2022 · Linux Kernel kcm kcmsock.c kcm_tx_work race condition
    10Monitor
  • Later →CVE-2022-3526Oct 16, 2022 · Linux Kernel skb macvlan.c macvlan_handle_frame memory leak
    30Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
almalinux:kernel-rt5.14.0-284.11.1.rt14.296.el9_2 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-rt-core5.14.0-284.11.1.rt14.296.el9_2 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-rt-debug5.14.0-284.11.1.rt14.296.el9_2 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-rt-debug-core5.14.0-284.11.1.rt14.296.el9_2 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-rt-debug-devel5.14.0-284.11.1.rt14.296.el9_2 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-rt-debug-kvm5.14.0-284.11.1.rt14.296.el9_2 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-rt-debug-modules5.14.0-284.11.1.rt14.296.el9_2 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-rt-debug-modules-core5.14.0-284.11.1.rt14.296.el9_2 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-rt-debug-modules-extra5.14.0-284.11.1.rt14.296.el9_2 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-rt-devel5.14.0-284.11.1.rt14.296.el9_2 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-rt-kvm5.14.0-284.11.1.rt14.296.el9_2 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-rt-modules5.14.0-284.11.1.rt14.296.el9_2 · AlmaLinux:9Package registry (OSV)
debian:linux6.0.7-1 · Debian:12Package registry (OSV)
debian:linux-5.105.10.158-2~deb10u1 · Debian:10Package registry (OSV)
opensuse:kernel-azure5.3.18-150300.38.83.1 · openSUSE:Leap 15.3Package registry (OSV)
opensuse:kernel-rt5.3.18-150300.109.1 · openSUSE:Leap Micro 5.2Package registry (OSV)
opensuse:kernel-source-azure5.3.18-150300.38.83.1 · openSUSE:Leap 15.3Package registry (OSV)
opensuse:kernel-syms-azure5.3.18-150300.38.83.1 · openSUSE:Leap 15.3Package registry (OSV)
red hat:kernel-rt0:5.14.0-284.11.1.rt14.296.el9_2 · Red Hat:enterprise_linux:9::nfvPackage registry (OSV)
red hat:kernel-rt-core0:5.14.0-284.11.1.rt14.296.el9_2 · Red Hat:enterprise_linux:9::nfvPackage registry (OSV)
red hat:kernel-rt-debug0:5.14.0-284.11.1.rt14.296.el9_2 · Red Hat:enterprise_linux:9::nfvPackage registry (OSV)
red hat:kernel-rt-debug-core0:5.14.0-284.11.1.rt14.296.el9_2 · Red Hat:enterprise_linux:9::nfvPackage registry (OSV)
red hat:kernel-rt-debug-debuginfo0:5.14.0-284.11.1.rt14.296.el9_2 · Red Hat:enterprise_linux:9::nfvPackage registry (OSV)
red hat:kernel-rt-debug-devel0:5.14.0-284.11.1.rt14.296.el9_2 · Red Hat:enterprise_linux:9::nfvPackage registry (OSV)
red hat:kernel-rt-debug-kvm0:5.14.0-284.11.1.rt14.296.el9_2 · Red Hat:enterprise_linux:9::nfvPackage registry (OSV)
red hat:kernel-rt-debug-modules0:5.14.0-284.11.1.rt14.296.el9_2 · Red Hat:enterprise_linux:9::nfvPackage registry (OSV)
red hat:kernel-rt-debug-modules-core0:5.14.0-284.11.1.rt14.296.el9_2 · Red Hat:enterprise_linux:9::nfvPackage registry (OSV)
red hat:kernel-rt-debug-modules-extra0:5.14.0-284.11.1.rt14.296.el9_2 · Red Hat:enterprise_linux:9::nfvPackage registry (OSV)
red hat:kernel-rt-debuginfo0:5.14.0-284.11.1.rt14.296.el9_2 · Red Hat:enterprise_linux:9::nfvPackage registry (OSV)
red hat:kernel-rt-debuginfo-common-x86_640:5.14.0-284.11.1.rt14.296.el9_2 · Red Hat:enterprise_linux:9::nfvPackage registry (OSV)

+8

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.

EPSS, last 120 days

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.

Credits

All researchers

Finders, 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).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

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
none
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
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-404 · Improper Resource Shutdown or Release

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (5 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records