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NVD / CVE Program· CNA Linux

CVE-2022-49919: netfilter: nf_tables: release flow rule object from commit path

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: 0.15% (FIRST EPSS).
  • 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.
  • Fixed version: Linux Linux 26b5934ff4194e13196bedcba373cd4915071d0e, 4ab6f96444e936f5e4a936d5c0bc948144bcded3, 5.10.154.

Low priority for now. Upgrade to Linux Linux 26b5934ff4194e13196bedcba373cd4915071d0e, 4ab6f96444e936f5e4a936d5c0bc948144bcded3, 5.10.154 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

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: release flow rule object from commit path No need to postpone this to the commit release path, since no packets are walking over this object, this is accessed from control plane only. This helped uncovered UAF triggered by races with the netlink notifier.

HighCVSS 7.0 · v3.1—No exploit Fix available
Published
May 1, 2025
Updated
Aug 5, 2026
EPSS
0.1% · 5th percentile

Report tools

JSON

Action score

28

Monitor

Low priority for now.

CVSS
28 / 40 · 7.0 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
7.0
CNA · Linux
7.8
0.8 point gap

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

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-2022-49919

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

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel5.4.198 and later · before 5.4.224
  • linux linux kernel5.10.122 and later · before 5.10.154
  • linux linux kernel5.15.47 and later · before 5.15.78
  • linux linux kernel5.17.15 and later · before 5.18
  • linux linux kernel5.18.4 and later · before 6.0.8
  • linux linux kernel6.1

Versions reported by the vendor

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

  • Linux Linux

    • 80de9ea1f5b808a6601e91111fae601df2b26369, ab9f34a30c23f656e76f4c5b83125a4e7b53c86e, 5.19affected
    • 5b8d63489c3b701eb2a76f848ec94d8cbc9373b9 and later · before 74fd5839467054cd9c4d050614d3ee8788386171affected · git
    • 330c0c6cd2150a2d7f47af16aa590078b0d2f736 and later · before b2d7a92aff0fbd93c29d2aa6451fb99f050e2c4eaffected · git
    • e33d9bd563e71f6c6528b96008d65524a459c4dc and later · before 6044791b7be707fd0e709f26e961a446424e5051affected · git
    • 9dd732e0bdf538b1b76dc7c157e2b5e560ff30d3 and later · before 4ab6f96444e936f5e4a936d5c0bc948144bcded3affected · git
    • 9dd732e0bdf538b1b76dc7c157e2b5e560ff30d3 and later · before 26b5934ff4194e13196bedcba373cd4915071d0eaffected · git
    • 5.4.198 and later · before 5.4.224affected · semver
    • 5.10.122 and later · before 5.10.154affected · semver
    • 5.15.47 and later · before 5.15.78affected · semver
    • 5.17.15 and later · before 5.18affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.0.8-16.0.8-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • 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

Published before and after this one in the same product

  • ← EarlierCVE-2022-49915May 1, 2025 · mISDN: fix possible memory leak in mISDN_register_device()
    22Monitor
  • ← EarlierCVE-2022-49916May 1, 2025 · rose: Fix NULL pointer dereference in rose_send_frame()
    22Monitor
  • Later →CVE-2022-49920May 1, 2025 · netfilter: nf_tables: netlink notifier might race to release objects
    18Monitor

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
Linux Linux26b5934ff4194e13196bedcba373cd4915071d0eVendor (CNA)
Linux Linux4ab6f96444e936f5e4a936d5c0bc948144bcded3Vendor (CNA)
Linux Linux5.10.154Vendor (CNA)
Linux Linux5.15.78Vendor (CNA)
Linux Linux5.18Vendor (CNA)
Linux Linux5.19Vendor (CNA)
Linux Linux5.4.224Vendor (CNA)
Linux Linux6044791b7be707fd0e709f26e961a446424e5051Vendor (CNA)
Linux Linux74fd5839467054cd9c4d050614d3ee8788386171Vendor (CNA)
Linux Linuxb2d7a92aff0fbd93c29d2aa6451fb99f050e2c4eVendor (CNA)
debian:linux6.0.8-1 · Debian:12Package 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.

No history yet (it accumulates with the daily EPSS job).

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 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).

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.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

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

References

Show all references (4 more)

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

All records