VulnerabilityPublished 23 Jan 2026Updated 5 Nov 2026

CVE-2025-71157: Linux kernel · RDMA/core: always drop device refcount in ib_del_sub_device_and_put()

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in fe8d456080423b9ed410469fbd1e2098d3acce2b : update Linux kernel when convenient.

Data as of 5 Nov 2026, 23:24 UTC

Severity

Unrated

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

Thin evidence

One scorer or none

EPSS

0.1% chance of exploitation in 30 days – higher than 3% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

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 fe8d456080423b9ed410469fbd1e2098d3acce2b, fa3c411d21ebc26ffd175c7256c37cefa35020aa, 20436f2742a92b7afeb2504eb559a98d2196b001

Exploitation evidence

Disclosed: evidence found.
CVE published 23 Jan 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 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 Linux kernel to fe8d456080423b9ed410469fbd1e2098d3acce2b, fa3c411d21ebc26ffd175c7256c37cefa35020aa or 20436f2742a92b7afeb2504eb559a98d2196b001.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ bca51197620a257e2954be99b16f05115c3b2630, < fe8d456080423b9ed410469fbd1e2098d3acce2b	Fixed in fe8d456080423b9ed410469fbd1e2098d3acce2b
LinuxLinux	Affected ≥ bca51197620a257e2954be99b16f05115c3b2630, < fa3c411d21ebc26ffd175c7256c37cefa35020aa	Fixed in fa3c411d21ebc26ffd175c7256c37cefa35020aa
LinuxLinux	Affected ≥ bca51197620a257e2954be99b16f05115c3b2630, < 20436f2742a92b7afeb2504eb559a98d2196b001	Fixed in 20436f2742a92b7afeb2504eb559a98d2196b001
LinuxLinux	Affected =6.11	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: RDMA/core: always drop device refcount in ib_del_sub_device_and_put() Since nldev_deldev() (introduced by commit 060c642b2ab8 ("RDMA/nldev: Add support to add/delete a sub IB device through netlink") grabs a reference using ib_device_get_by_index() before calling ib_del_sub_device_and_put(), we need to drop that reference before returning -EOPNOTSUPP error.

References

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