CVE-2026-89896

Kernel memory leak via unfreed control handler

Published Sep 16, 2026 · Updated Sep 16, 2026

A memory leak in the Cedrus media driver in Linux 4.20 through 7.1.1 allows attackers to retain kernel allocations via unspecified vectors. In cedrus_init_ctrls(), V4L2 initializes the control handler before kzalloc allocates ctx->ctrls, then returns ENOMEM without freeing the handler when that allocation fails. Reachability requires the Cedrus VPU driver and this allocation-failure path; upstream reported no runtime test or demonstrated service interruption.

CVSS severityUnavailable
Unscored
EPSS probabilityUnavailable
No score available in this record
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A memory leak in the Cedrus media driver in Linux 4.20 through 7.1.1 allows attackers to retain kernel allocations via unspecified vectors. In cedrus_init_ctrls(), V4L2 initializes the control handler before kzalloc allocates ctx->ctrls, then returns ENOMEM without freeing the handler when that allocation fails. Reachability requires the Cedrus VPU driver and this allocation-failure path; upstream reported no runtime test or demonstrated service interruption.

The record

CVE
CVE-2026-89896
Published
Sep 16, 2026
Updated
Sep 16, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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=4.20
  2. Affected versionversion=50e761516f2b8c0cdeb31a8c6ca1b4ef98cd13f1 <22441be29ec27c693f40c1ef499093275ef529d1
  3. Affected versionversion=50e761516f2b8c0cdeb31a8c6ca1b4ef98cd13f1 <6fabacc3b79a528450aef4c32464da2ec681049e
  4. Affected versionversion=50e761516f2b8c0cdeb31a8c6ca1b4ef98cd13f1 <729a1ffab968b3c493f61d1cd683f5bafec500ea
  5. Affected versionversion=50e761516f2b8c0cdeb31a8c6ca1b4ef98cd13f1 <79fd0b0161506fc9507bf7a6fe4c975a857a5be8
  6. Affected versionversion=50e761516f2b8c0cdeb31a8c6ca1b4ef98cd13f1 <81aa608ac3a56cdd4aab0bd12442ed529a24ba31
  7. Affected versionversion=50e761516f2b8c0cdeb31a8c6ca1b4ef98cd13f1 <9df2fbe563194da1967a5db083442186c1323efe
  8. Affected versionversion=50e761516f2b8c0cdeb31a8c6ca1b4ef98cd13f1 <ce5693b6e3a693fcdc3800af309363f6250104c8
  9. Affected versionversion=50e761516f2b8c0cdeb31a8c6ca1b4ef98cd13f1 <f78cf36cabf911da348ea80e4e9f430d74f6905c

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=4.20; version=50e761516f2b8c0cdeb31a8c6ca1b4ef98cd13f1 <22441be29ec27c693f40c1ef499093275ef529d1; version=50e761516f2b8c0cdeb31a8c6ca1b4ef98cd13f1 <6fabacc3b79a528450aef4c32464da2ec681049e; version=50e761516f2b8c0cdeb31a8c6ca1b4ef98cd13f1 <729a1ffab968b3c493f61d1cd683f5bafec500ea; version=50e761516f2b8c0cdeb31a8c6ca1b4ef98cd13f1 <79fd0b0161506fc9507bf7a6fe4c975a857a5be8; version=50e761516f2b8c0cdeb31a8c6ca1b4ef98cd13f1 <81aa608ac3a56cdd4aab0bd12442ed529a24ba31; version=50e761516f2b8c0cdeb31a8c6ca1b4ef98cd13f1 <9df2fbe563194da1967a5db083442186c1323efe; version=50e761516f2b8c0cdeb31a8c6ca1b4ef98cd13f1 <ce5693b6e3a693fcdc3800af309363f6250104c8; version=50e761516f2b8c0cdeb31a8c6ca1b4ef98cd13f1 <f78cf36cabf911da348ea80e4e9f430d74f6905c

Published CVSS scores

No CVSS assessment is available in this record.

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)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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