CVE-2022-50664

Kernel memory exhaustion via unreleased firmware

Published Dec 9, 2025 · Updated May 11, 2026

Memory leak in the Linux kernel bcm3510 DVB frontend allows local users to exhaust kernel memory through repeated failed firmware writes. bcm3510_download_firmware() returns after bcm3510_write_ram() fails without releasing the firmware object allocated by request_firmware(). Reachability requires administrative access, a configured BCM3510 tuner, and repeated firmware-load failures; the bounded consequence is service interruption from memory exhaustion.

CVSS severity4.4
Medium
EPSS probability0.28%
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 bcm3510 DVB frontend allows local users to exhaust kernel memory through repeated failed firmware writes. bcm3510_download_firmware() returns after bcm3510_write_ram() fails without releasing the firmware object allocated by request_firmware(). Reachability requires administrative access, a configured BCM3510 tuner, and repeated firmware-load failures; the bounded consequence is service interruption from memory exhaustion.

The record

CVE
CVE-2022-50664
Published
Dec 9, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Dec 9, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=2.6.13
  2. Affected versionversion=55f51efdb696ff6e9d2056377d05268a97f3d4e4 <25cab05aa2df904ee1fea37d8dfa0d92c951bb4e
  3. Affected versionversion=55f51efdb696ff6e9d2056377d05268a97f3d4e4 <438a4a8dece2abac099777a00db91784c0996cdc
  4. Affected versionversion=55f51efdb696ff6e9d2056377d05268a97f3d4e4 <438cd29fec3ea09769639f6032687e0c1434dbe0
  5. Affected versionversion=55f51efdb696ff6e9d2056377d05268a97f3d4e4 <669fb90507dbaf419aa3871bf73160e93d50487f
  6. Affected versionversion=55f51efdb696ff6e9d2056377d05268a97f3d4e4 <a15fe8d9f1bf460a804bcf18a890bfd2cf0d5caa
  7. Affected versionversion=55f51efdb696ff6e9d2056377d05268a97f3d4e4 <a44828482bd5b11d728d7dac09b0d723aab9ff7b
  8. Affected versionversion=55f51efdb696ff6e9d2056377d05268a97f3d4e4 <afccb6ac63fc4328bc61ba086a3cad30054d87c1
  9. Affected versionversion=55f51efdb696ff6e9d2056377d05268a97f3d4e4 <b42580c8d8aac11a66046897979cc13cfd04c541
  10. Affected versionversion=55f51efdb696ff6e9d2056377d05268a97f3d4e4 <b4d8fd008de1774d99a5b50acc03d92a1919c3a7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.13; version=55f51efdb696ff6e9d2056377d05268a97f3d4e4 <25cab05aa2df904ee1fea37d8dfa0d92c951bb4e; version=55f51efdb696ff6e9d2056377d05268a97f3d4e4 <438a4a8dece2abac099777a00db91784c0996cdc; version=55f51efdb696ff6e9d2056377d05268a97f3d4e4 <438cd29fec3ea09769639f6032687e0c1434dbe0; version=55f51efdb696ff6e9d2056377d05268a97f3d4e4 <669fb90507dbaf419aa3871bf73160e93d50487f; version=55f51efdb696ff6e9d2056377d05268a97f3d4e4 <a15fe8d9f1bf460a804bcf18a890bfd2cf0d5caa; version=55f51efdb696ff6e9d2056377d05268a97f3d4e4 <a44828482bd5b11d728d7dac09b0d723aab9ff7b; version=55f51efdb696ff6e9d2056377d05268a97f3d4e4 <afccb6ac63fc4328bc61ba086a3cad30054d87c1; version=55f51efdb696ff6e9d2056377d05268a97f3d4e4 <b42580c8d8aac11a66046897979cc13cfd04c541; version=55f51efdb696ff6e9d2056377d05268a97f3d4e4 <b4d8fd008de1774d99a5b50acc03d92a1919c3a7

Published CVSS scores

4.3TenableAV:L/AC:L/Au:M/C:N/I:N/A:C
4.4TenableCVSS:3.1/AV:L/AC:L/PR:H/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

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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