CVE-2026-31585

Local memory exhaustion via stale nfeeds counter

Published Apr 24, 2026 · Updated Apr 24, 2026

Memory leak in the Linux Kernel vidtv driver allows local users to exhaust kernel memory through repeated failed stream starts. The vidtv_start_feed() failure path leaves nfeeds incremented after vidtv_start_streaming() fails, causing later calls to skip mux startup while cleanup returns early with partially allocated mux and channel objects. Exploitation requires the non-default vidtv test driver and local access to its feed controls; the bounded consequence is memory exhaustion and 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

Memory leak in the Linux Kernel vidtv driver allows local users to exhaust kernel memory through repeated failed stream starts. The vidtv_start_feed() failure path leaves nfeeds incremented after vidtv_start_streaming() fails, causing later calls to skip mux startup while cleanup returns early with partially allocated mux and channel objects. Exploitation requires the non-default vidtv test driver and local access to its feed controls; the bounded consequence is memory exhaustion and service interruption.

The record

CVE
CVE-2026-31585
Published
Apr 24, 2026
Updated
Apr 24, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-401, T1499.001
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 24, 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <25f19e476ab15defe698504212899fdb9f7cd61b
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4bf95f797edd63c93330eafb6d6e670982344b9b
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <83110c2c8c46c035c2e0fc8ff3e4991183bf9ccd
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <98c22210aeadce67d9d20059f0dbbd01ba7fdbba

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <25f19e476ab15defe698504212899fdb9f7cd61b; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4bf95f797edd63c93330eafb6d6e670982344b9b; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <83110c2c8c46c035c2e0fc8ff3e4991183bf9ccd; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <98c22210aeadce67d9d20059f0dbbd01ba7fdbba

Published CVSS scores

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-401Missing Release of Memory after Effective Lifetime
T1499.001Endpoint Denial of Service: OS Exhaustion Flood

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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