CVE-2026-52984 - Vulnerability Details

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

Description

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.

Published: 2026-06-24

Score: 5.5 Medium

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Linux

unaffected

Version	Status	Constraints
`216509dda290f6db92c816dd54b83c1df9da9e76`	affected	< 0f875d52db4c921da610e481b72f03cc82fdcb72
`c2047b0e216c8edce227d7c42f99ac2877dad0e4`	affected	< ef9a41b3870fb90577da5b2de5bd140022d4021e
`10df49cfca73dfbbdb6c4150d859f7e8926ae427`	affected	< 74fcd8e127200a50ee22ba2b45c164722bdb9177
`3824c5fad18eeb7abe0c4fc966f29959552dca3e`	affected	< 39a66e83ea41fe845631eeb8d326953de27d13f9
`356078a5c55ec8d2061fcc009fb8599f5b0527f9`	affected	< 54b5dbacd00dedffd5e2eed76de1c3839996b5e6
`f8d4bc455047cf3903cd6f85f49978987dbb3027`	affected	< 8450462eaf91d5d2a9e863507b16d18e814baef3
`f8d4bc455047cf3903cd6f85f49978987dbb3027`	affected	< 936a7dd87251f6f3e88983350833edf60fe6a80b
`f8d4bc455047cf3903cd6f85f49978987dbb3027`	affected	< 4185701fcce6b426b6c3630b25330dddd9c47b0d
`83c6ab12f08dcc09d4c5ac86fdb89736b28f1d31`	affected	—
`5.10.232`	affected	< 5.10.258
`5.15.175`	affected	< 5.15.209
`6.1.121`	affected	< 6.1.175
`6.6.67`	affected	< 6.6.141
`6.12.6`	affected	< 6.12.91
`5.4.288`	affected	< 5.5

Linux

affected

Version	Status	Constraints
`6.13`	affected	—
`0`	unaffected	< 6.13
`5.10.258`	unaffected	≤ 5.10.*
`5.15.209`	unaffected	≤ 5.15.*
`6.1.175`	unaffected	≤ 6.1.*
`6.6.141`	unaffected	≤ 6.6.*
`6.12.91`	unaffected	≤ 6.12.*
`6.18.33`	unaffected	≤ 6.18.*
`7.0.10`	unaffected	≤ 7.0.*
`7.1`	unaffected	≤ *

No data.

Vendor Product Confidence Versions

Linux

Linux Kernel

99%

Version	Status	Scheme	Platform
`[216509dda290f6db92c816dd54b83c1df9da9e76,0f875d52db4c921da610e481b72f03cc82fdcb72)`	affected	code_commit	—
`[c2047b0e216c8edce227d7c42f99ac2877dad0e4,ef9a41b3870fb90577da5b2de5bd140022d4021e)`	affected	code_commit	—
`[10df49cfca73dfbbdb6c4150d859f7e8926ae427,74fcd8e127200a50ee22ba2b45c164722bdb9177)`	affected	code_commit	—
`[3824c5fad18eeb7abe0c4fc966f29959552dca3e,39a66e83ea41fe845631eeb8d326953de27d13f9)`	affected	code_commit	—
`[356078a5c55ec8d2061fcc009fb8599f5b0527f9,54b5dbacd00dedffd5e2eed76de1c3839996b5e6)`	affected	code_commit	—
`[f8d4bc455047cf3903cd6f85f49978987dbb3027,8450462eaf91d5d2a9e863507b16d18e814baef3)`	affected	code_commit	—
`[f8d4bc455047cf3903cd6f85f49978987dbb3027,936a7dd87251f6f3e88983350833edf60fe6a80b)`	affected	code_commit	—
`[f8d4bc455047cf3903cd6f85f49978987dbb3027,4185701fcce6b426b6c3630b25330dddd9c47b0d)`	affected	code_commit	—
`83c6ab12f08dcc09d4c5ac86fdb89736b28f1d31`	affected	code_commit	—
`[5.10.232,5.10.258)`	affected	semver	—
`[5.15.175,5.15.209)`	affected	semver	—
`[6.1.121,6.1.175)`	affected	semver	—
`[6.6.67,6.6.141)`	affected	semver	—
`[6.12.6,6.12.91)`	affected	semver	—
`[5.4.288,5.5)`	affected	semver	—

Linux

Linux Kernel

99%

Version	Status	Scheme	Platform
`6.13`	affected	semver	—
`[0,6.13)`	unaffected	generic	—
`[5.10.0,5.11.0)`	unaffected	semver	—
`[5.15.0,5.16.0)`	unaffected	semver	—
`[6.1.0,6.2.0)`	unaffected	semver	—
`[6.6.0,6.7.0)`	unaffected	semver	—
`[6.12.0,6.13.0)`	unaffected	semver	—
`[6.18.0,6.19.0)`	unaffected	semver	—
`[7.0.0,7.1.0)`	unaffected	semver	—
`[7.1,*]`	unaffected	generic	—

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Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00184.

Key SSVC decision points have not yet been added.

References

Link	Providers
https://git.kernel.org/stable/c/0f875d52db4c921da610e481b72f03cc82fdcb72
https://git.kernel.org/stable/c/39a66e83ea41fe845631eeb8d326953de27d13f9
https://git.kernel.org/stable/c/4185701fcce6b426b6c3630b25330dddd9c47b0d
https://git.kernel.org/stable/c/54b5dbacd00dedffd5e2eed76de1c3839996b5e6
https://git.kernel.org/stable/c/74fcd8e127200a50ee22ba2b45c164722bdb9177
https://git.kernel.org/stable/c/8450462eaf91d5d2a9e863507b16d18e814baef3
https://git.kernel.org/stable/c/936a7dd87251f6f3e88983350833edf60fe6a80b
https://git.kernel.org/stable/c/ef9a41b3870fb90577da5b2de5bd140022d4021e
https://lore.kernel.org/linux-cve-announce/2026062442-CVE-2026-52984-110c@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2026-52984
https://www.cve.org/CVERecord?id=CVE-2026-52984

History

Fri, 26 Jun 2026 04:15:00 +0000

Type	Values Removed	Values Added
Weaknesses	CWE-119 CWE-400

Fri, 26 Jun 2026 00:15:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-770
References		https://lore.kernel.org/linux-cve-announce/2026062442-CVE-2026-52984-110c@gregkh/T https://nvd.nist.gov/vuln/detail/CVE-2026-52984 https://www.cve.org/CVERecord?id=CVE-2026-52984
Metrics	threat_severity `None`	cvssV3_1 `{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}` threat_severity `Low`

Wed, 24 Jun 2026 19:00:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-119 CWE-400

Wed, 24 Jun 2026 17:15:00 +0000

Type	Values Removed	Values Added
Description		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.
Title		net/sched: netem: fix queue limit check to include reordered packets
First Time appeared		Linux Linux linux Kernel
CPEs		cpe:2.3:o:linux:linux_kernel::::::::
Vendors & Products		Linux Linux linux Kernel
References		https://git.kernel.org/stable/c/0f875d52db4c921da610e481b72f03cc82fdcb72 https://git.kernel.org/stable/c/39a66e83ea41fe845631eeb8d326953de27d13f9 https://git.kernel.org/stable/c/4185701fcce6b426b6c3630b25330dddd9c47b0d https://git.kernel.org/stable/c/54b5dbacd00dedffd5e2eed76de1c3839996b5e6 https://git.kernel.org/stable/c/74fcd8e127200a50ee22ba2b45c164722bdb9177 https://git.kernel.org/stable/c/8450462eaf91d5d2a9e863507b16d18e814baef3 https://git.kernel.org/stable/c/936a7dd87251f6f3e88983350833edf60fe6a80b https://git.kernel.org/stable/c/ef9a41b3870fb90577da5b2de5bd140022d4021e

Subscriptions

Linux Linux Kernel

MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2026-06-24T16:28:59.088Z

Updated: 2026-06-24T16:28:59.088Z

Reserved: 2026-06-09T07:44:35.376Z

Link: CVE-2026-52984

Vulnrichment

No data.

NVD

No data.

Redhat

Severity : Low

Publid Date: 2026-06-24T00:00:00Z

Links: CVE-2026-52984 - Bugzilla

OpenCVE Enrichment

Updated: 2026-06-26T05:30:17Z

Weaknesses

CWE-770

Tracking

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

Subscriptions

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