VulnerabilityPublished 24 Jun 2026Updated 6 Nov 2026

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

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in ef9a41b3870fb90577da5b2de5bd140022d4021e : update Linux kernel when convenient.

Data as of 6 Nov 2026, 16:49 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Exploitation: No evidence of active exploitation and no public proof of concept
Automatable: Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact: Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-06.

Patch

Available – fixed in ef9a41b3870fb90577da5b2de5bd140022d4021e, 8450462eaf91d5d2a9e863507b16d18e814baef3, 4185701fcce6b426b6c3630b25330dddd9c47b0d +11

Exploitation evidence

Disclosed: evidence found.
CVE published 24 Jun 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 6 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected >=5.10.232 <5.10.258 >=5.15.175 <5.15.209 >=6.1.121 <6.1.175 >=6.6.67 <6.6.141 >=6.12.6 <6.12.91 >=5.4.288 <5.5	Fixed in ef9a41b3870fb90577da5b2de5bd140022d4021e 8450462eaf91d5d2a9e863507b16d18e814baef3 4185701fcce6b426b6c3630b25330dddd9c47b0d 936a7dd87251f6f3e88983350833edf60fe6a80b 74fcd8e127200a50ee22ba2b45c164722bdb9177 54b5dbacd00dedffd5e2eed76de1c3839996b5e6 39a66e83ea41fe845631eeb8d326953de27d13f9 6.12.91 6.6.141 6.1.175 5.15.209 5.10.258 5.5 0f875d52db4c921da610e481b72f03cc82fdcb72
LinuxLinux	Affected =6.13	Fixed in–

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.

References

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