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NVD / CVE Program· CNA Linux

CVE-2026-52984: net/sched: netem: fix queue limit check to include reordered packets

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: 0.12% (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: Linux Linux 0f875d52db4c921da610e481b72f03cc82fdcb72, 39a66e83ea41fe845631eeb8d326953de27d13f9, 4185701fcce6b426b6c3630b25330dddd9c47b0d; azl3 kernel 6.6.139.1-1 on Azure Linux 3.0 6.6.143.1-1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 0f875d52db4c921da610e481b72f03cc82fdcb72, 39a66e83ea41fe845631eeb8d326953de27d13f9, 4185701fcce6b426b6c3630b25330dddd9c47b0d; azl3 kernel 6.6.139.1-1 on Azure Linux 3.0 6.6.143.1-1 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: net/sched: netem: fix queue limit check to include reordered packets The queue limit check in netem_enqueue() uses q->t_len which only counts packets in the internal tfifo. Packets placed in sch->q by the reorder path (__qdisc_enqueue_head) are not counted, allowing the total queue occupancy to exceed sch->limit under reordering. Include sch->q.qlen in the limit check.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Jun 24, 2026
Updated
Nov 6, 2026
EPSS
0.1% · 2th percentile
CWE
—

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 · 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-2026-52984

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 kernel5.4.288 and later · before 5.5
  • linux linux kernel5.10.232 and later · before 5.10.258
  • linux linux kernel5.15.175 and later · before 5.15.209
  • linux linux kernel6.1.121 and later · before 6.1.175
  • linux linux kernel6.6.67 and later · before 6.6.141
  • linux linux kernel6.12.6 and later · before 6.12.91
  • linux linux kernel6.13.1 and later · before 6.18.33
  • linux linux kernel6.19 and later · before 7.0.10
  • linux linux kernel6.13
  • linux linux kernel7.1

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

    • 83c6ab12f08dcc09d4c5ac86fdb89736b28f1d31, 6.13affected
    • 216509dda290f6db92c816dd54b83c1df9da9e76 and later · before 0f875d52db4c921da610e481b72f03cc82fdcb72affected · git
    • c2047b0e216c8edce227d7c42f99ac2877dad0e4 and later · before ef9a41b3870fb90577da5b2de5bd140022d4021eaffected · git
    • 10df49cfca73dfbbdb6c4150d859f7e8926ae427 and later · before 74fcd8e127200a50ee22ba2b45c164722bdb9177affected · git
    • 3824c5fad18eeb7abe0c4fc966f29959552dca3e and later · before 39a66e83ea41fe845631eeb8d326953de27d13f9affected · git
    • 356078a5c55ec8d2061fcc009fb8599f5b0527f9 and later · before 54b5dbacd00dedffd5e2eed76de1c3839996b5e6affected · git
    • f8d4bc455047cf3903cd6f85f49978987dbb3027 and later · before 8450462eaf91d5d2a9e863507b16d18e814baef3affected · git
    • f8d4bc455047cf3903cd6f85f49978987dbb3027 and later · before 936a7dd87251f6f3e88983350833edf60fe6a80baffected · git
    • f8d4bc455047cf3903cd6f85f49978987dbb3027 and later · before 4185701fcce6b426b6c3630b25330dddd9c47b0daffected · git
    • 5.10.232 and later · before 5.10.258affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.176-16.1.176-1
Debian:13linuxbefore 6.12.94-16.12.94-1
Debian:14linuxbefore 7.0.10-17.0.10-1

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-2026-52982Jun 24, 2026 · net: usb: rtl8150: fix use-after-free in rtl8150_start_xmit()
    39Monitor
  • ← EarlierCVE-2026-52983Jun 24, 2026 · net: airoha: fix BQL imbalance in TX path
    30Monitor
  • Later →CVE-2026-52985Jun 24, 2026 · netdevsim: zero initialize struct iphdr in dummy sk_buff
    22Monitor

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 Linux0f875d52db4c921da610e481b72f03cc82fdcb72Vendor (CNA)
Linux Linux39a66e83ea41fe845631eeb8d326953de27d13f9Vendor (CNA)
Linux Linux4185701fcce6b426b6c3630b25330dddd9c47b0dVendor (CNA)
Linux Linux5.10.258Vendor (CNA)
Linux Linux5.15.209Vendor (CNA)
Linux Linux5.5Vendor (CNA)
Linux Linux54b5dbacd00dedffd5e2eed76de1c3839996b5e6Vendor (CNA)
Linux Linux6.1.175Vendor (CNA)
Linux Linux6.12.91Vendor (CNA)
Linux Linux6.6.141Vendor (CNA)
Linux Linux74fcd8e127200a50ee22ba2b45c164722bdb9177Vendor (CNA)
Linux Linux8450462eaf91d5d2a9e863507b16d18e814baef3Vendor (CNA)
Linux Linux936a7dd87251f6f3e88983350833edf60fe6a80bVendor (CNA)
Linux Linuxef9a41b3870fb90577da5b2de5bd140022d4021eVendor (CNA)
azl3 kernel 6.6.139.1-1 on Azure Linux 3.06.6.143.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.176-1 · 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).

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)

—

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.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. SSVC exploitation— → none
  2. Fix✗ → ✓

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

References

Show all references (7 more)

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

All records