CVE-2025-71087

Service interruption via off-by-one RSS loops

Published Jan 13, 2026 · Updated Jan 13, 2026

Off-by-one errors in Linux Kernel iavf RSS configuration allow local users to trigger out-of-bounds memory reads and device-register writes. In iavf_config_rss_reg(), the RSS key and lookup-table loops use <= with dword counts, so each loop processes one element beyond its valid final index. Reachability requires local low-privileged access and an active iavf device path; the published impact is limited to service interruption.

CVSS severity5.5
Medium
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Off-by-one errors in Linux Kernel iavf RSS configuration allow local users to trigger out-of-bounds memory reads and device-register writes. In iavf_config_rss_reg(), the RSS key and lookup-table loops use <= with dword counts, so each loop processes one element beyond its valid final index. Reachability requires local low-privileged access and an active iavf device path; the published impact is limited to service interruption.

The record

CVE
CVE-2025-71087
Published
Jan 13, 2026
Updated
Jan 13, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-193, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=43a3d9ba34c9ca313573201d3f45de5ab3494cec <18de0e41d69d97fab10b91fecf10ae78a5e43232
  2. Affected versionversion=43a3d9ba34c9ca313573201d3f45de5ab3494cec <3095228e1320371e143835d0cebeef1a8a754c66
  3. Affected versionversion=43a3d9ba34c9ca313573201d3f45de5ab3494cec <6daa2893f323981c7894c68440823326e93a7d61
  4. Affected versionversion=43a3d9ba34c9ca313573201d3f45de5ab3494cec <d7369dc8dd7cbf5cee3a22610028d847b6f02982
  5. Affected versionversion=43a3d9ba34c9ca313573201d3f45de5ab3494cec <f36de3045d006e6d9be1be495f2ed88d1721e752
  6. Affected versionversion=4.7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=43a3d9ba34c9ca313573201d3f45de5ab3494cec <18de0e41d69d97fab10b91fecf10ae78a5e43232; version=43a3d9ba34c9ca313573201d3f45de5ab3494cec <3095228e1320371e143835d0cebeef1a8a754c66; version=43a3d9ba34c9ca313573201d3f45de5ab3494cec <6daa2893f323981c7894c68440823326e93a7d61; version=43a3d9ba34c9ca313573201d3f45de5ab3494cec <d7369dc8dd7cbf5cee3a22610028d847b6f02982; version=43a3d9ba34c9ca313573201d3f45de5ab3494cec <f36de3045d006e6d9be1be495f2ed88d1721e752; version=4.7

Published CVSS scores

6.6Oracle LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-193Off-by-one Error
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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