CVE-2022-50523

Kernel memory exhaustion via PLL registration leak

Published Oct 7, 2025 · Updated Oct 7, 2025

Memory leak in the Rockchip PLL clock driver in affected Linux kernel versions allows local users to exhaust memory after registration failures. rockchip_clk_register_pll() allocates pll->rate_table with kmemdup(), but its clk_register() error path fails to free that buffer. Reachability requires the Rockchip clock driver and a clk_register() failure; repeated failures can interrupt the host through kernel-memory exhaustion.

CVSS severity5.5
Medium
EPSS probability0.16%
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 Rockchip PLL clock driver in affected Linux kernel versions allows local users to exhaust memory after registration failures. rockchip_clk_register_pll() allocates pll->rate_table with kmemdup(), but its clk_register() error path fails to free that buffer. Reachability requires the Rockchip clock driver and a clk_register() failure; repeated failures can interrupt the host through kernel-memory exhaustion.

The record

CVE
CVE-2022-50523
Published
Oct 7, 2025
Updated
Oct 7, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401, T1499.001
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 7, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 7, 2025Record 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=3.17
  2. Affected versionversion=90c590254051f511299538c158e12fdad41ce163 <20201c3a0a32f127fa4bdf379d6ac01c2978702d
  3. Affected versionversion=90c590254051f511299538c158e12fdad41ce163 <26b94635f1c84d7f6cb482179125cb17e59c90a5
  4. Affected versionversion=90c590254051f511299538c158e12fdad41ce163 <5b0a1f1247cd42ac5e0d369f8dbb58762692edee
  5. Affected versionversion=90c590254051f511299538c158e12fdad41ce163 <739a6a6bbdb793bd57938cb24aa5a6df89983546
  6. Affected versionversion=90c590254051f511299538c158e12fdad41ce163 <86e1e080ad14c5fb6c14a5f0eb530b1b38cbc968
  7. Affected versionversion=90c590254051f511299538c158e12fdad41ce163 <dcd4ba068b194c6ef0071491aa3f12bec8c14d5b
  8. Affected versionversion=90c590254051f511299538c158e12fdad41ce163 <f02c1d8dc8d880cbaaf9094b4f396fe868ee23ff
  9. Affected versionversion=90c590254051f511299538c158e12fdad41ce163 <f2ffb8653ea85ae39ce44347751fcc4c3e41f6bb
  10. Affected versionversion=90c590254051f511299538c158e12fdad41ce163 <f4d70c139d313948e02360304a6cbcd3a4f5deb5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.17; version=90c590254051f511299538c158e12fdad41ce163 <20201c3a0a32f127fa4bdf379d6ac01c2978702d; version=90c590254051f511299538c158e12fdad41ce163 <26b94635f1c84d7f6cb482179125cb17e59c90a5; version=90c590254051f511299538c158e12fdad41ce163 <5b0a1f1247cd42ac5e0d369f8dbb58762692edee; version=90c590254051f511299538c158e12fdad41ce163 <739a6a6bbdb793bd57938cb24aa5a6df89983546; version=90c590254051f511299538c158e12fdad41ce163 <86e1e080ad14c5fb6c14a5f0eb530b1b38cbc968; version=90c590254051f511299538c158e12fdad41ce163 <dcd4ba068b194c6ef0071491aa3f12bec8c14d5b; version=90c590254051f511299538c158e12fdad41ce163 <f02c1d8dc8d880cbaaf9094b4f396fe868ee23ff; version=90c590254051f511299538c158e12fdad41ce163 <f2ffb8653ea85ae39ce44347751fcc4c3e41f6bb; version=90c590254051f511299538c158e12fdad41ce163 <f4d70c139d313948e02360304a6cbcd3a4f5deb5

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
T1499.001OS Exhaustion Flood

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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