VulnerabilityPublished 18 Jun 2025Updated 5 Nov 2026

CVE-2025-38061: Linux kernel · net: pktgen: fix access outside of user given buffer in pktgen_thread_write()

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in ef1158a6a650ecee72ab40851b1d52e04d3f9cb5 : update Linux kernel when convenient.

Data as of 5 Nov 2026, 21:04 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, 2026-11-05.

Patch

Available – fixed in ef1158a6a650ecee72ab40851b1d52e04d3f9cb5, c81c2ee1c3b050ed5c4e92876590cc7a259183f6, a3d89f1cfe1e6d4bb164db2595511fd33db21900 +5

Exploitation evidence

Disclosed: evidence found.
CVE published 18 Jun 2025
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 5 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 ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < ef1158a6a650ecee72ab40851b1d52e04d3f9cb5	Fixed in ef1158a6a650ecee72ab40851b1d52e04d3f9cb5
LinuxLinux	Affected ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < c81c2ee1c3b050ed5c4e92876590cc7a259183f6	Fixed in c81c2ee1c3b050ed5c4e92876590cc7a259183f6
LinuxLinux	Affected ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < a3d89f1cfe1e6d4bb164db2595511fd33db21900	Fixed in a3d89f1cfe1e6d4bb164db2595511fd33db21900
LinuxLinux	Affected ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 425e64440ad0a2f03bdaf04be0ae53dededbaa77	Fixed in 425e64440ad0a2f03bdaf04be0ae53dededbaa77
LinuxLinux	Affected ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 128cdb617a87767c29be43e4431129942fce41df	Fixed in 128cdb617a87767c29be43e4431129942fce41df
LinuxLinux	Affected ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 8fef258b555c75a467a6b4b7e3a3cbc46d5f4102	Fixed in 8fef258b555c75a467a6b4b7e3a3cbc46d5f4102

Description

In the Linux kernel, the following vulnerability has been resolved: net: pktgen: fix access outside of user given buffer in pktgen_thread_write() Honour the user given buffer size for the strn_len() calls (otherwise strn_len() will access memory outside of the user given buffer).

References

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