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NVD / CVE Program· CNA Linux

CVE-2022-49571: tcp: Fix data-races around sysctl_tcp_max_reordering.

Noroxi assessment

Priority: Monitor (action score 18/100)

  • 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: 0.18% (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 064852663308c801861bd54789d81421fa4c2928, 46deb91ac8a790286ad6d24cf92e7ab0ab2582bb, 50a1d3d097503a90cf84ebe120afcde37e9c33b3.

Low priority for now. Upgrade to Linux Linux 064852663308c801861bd54789d81421fa4c2928, 46deb91ac8a790286ad6d24cf92e7ab0ab2582bb, 50a1d3d097503a90cf84ebe120afcde37e9c33b3 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: tcp: Fix data-races around sysctl_tcp_max_reordering. While reading sysctl_tcp_max_reordering, it can be changed concurrently. Thus, we need to add READ_ONCE() to its readers.

MediumCVSS 4.7 · v3.1—No exploit Fix available
Published
Feb 26, 2025
Updated
Jun 17, 2026
EPSS
0.1% · 8th percentile

Report tools

JSON

Action score

18

Monitor

Low priority for now.

CVSS
18 / 40 · 4.7 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

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-2022-49571

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 kernel3.19 and later · before 4.19.254
  • linux linux kernel4.20 and later · before 5.4.208
  • linux linux kernel5.5 and later · before 5.10.134
  • linux linux kernel5.11 and later · before 5.15.58
  • linux linux kernel5.16 and later · before 5.18.15
  • linux linux kernel5.19

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

    • 3.19affected
    • dca145ffaa8d39ea1904491ac81b92b7049372c0 and later · before 5e38cee24f19d19280c68f1ac8bf6790d607f60aaffected · git
    • dca145ffaa8d39ea1904491ac81b92b7049372c0 and later · before 50a1d3d097503a90cf84ebe120afcde37e9c33b3affected · git
    • dca145ffaa8d39ea1904491ac81b92b7049372c0 and later · before 064852663308c801861bd54789d81421fa4c2928affected · git
    • dca145ffaa8d39ea1904491ac81b92b7049372c0 and later · before ce3731c61589ed73364a5b55ce34131762ef9b60affected · git
    • dca145ffaa8d39ea1904491ac81b92b7049372c0 and later · before 46deb91ac8a790286ad6d24cf92e7ab0ab2582bbaffected · git
    • dca145ffaa8d39ea1904491ac81b92b7049372c0 and later · before a11e5b3e7a59fde1a90b0eaeaa82320495cf8caeaffected · git
    • before 3.19not affected · semver
    • 4.19.254 and later · up to and including 4.19.*not affected · semver
    • 5.4.208 and later · up to and including 5.4.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 5.18.16-15.18.16-1

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-2022-49569Feb 26, 2025 · spi: bcm2835: bcm2835_spi_handle_err(): fix NULL pointer deref for non DMA transfers
    22Monitor
  • ← EarlierCVE-2022-49570Feb 26, 2025 · gpio: gpio-xilinx: Fix integer overflow
    22Monitor
  • Later →CVE-2022-49572Feb 26, 2025 · tcp: Fix data-races around sysctl_tcp_slow_start_after_idle.
    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 Linux064852663308c801861bd54789d81421fa4c2928Vendor (CNA)
Linux Linux46deb91ac8a790286ad6d24cf92e7ab0ab2582bbVendor (CNA)
Linux Linux50a1d3d097503a90cf84ebe120afcde37e9c33b3Vendor (CNA)
Linux Linux5e38cee24f19d19280c68f1ac8bf6790d607f60aVendor (CNA)
Linux Linuxa11e5b3e7a59fde1a90b0eaeaa82320495cf8caeVendor (CNA)
Linux Linuxce3731c61589ed73364a5b55ce34131762ef9b60Vendor (CNA)
debian:linux5.18.16-1 · 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.

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.

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
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
High
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
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: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.

ATT&CK techniques

—

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