CVE-2022-50285

Service interruption via unlocked reservation decrement

Published Sep 15, 2025 · Updated Sep 15, 2025

Race condition in the Linux kernel allows local users to interrupt service by corrupting the huge-page reservation counter. The alloc_huge_page corner case decrements h->resv_huge_pages without hugetlb_lock even though that shared counter requires the lock. Exploitation requires local low-privileged access and concurrent huge-page allocation; public sources report counter corruption but no specific crash mode.

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

Race condition in the Linux kernel allows local users to interrupt service by corrupting the huge-page reservation counter. The alloc_huge_page corner case decrements h->resv_huge_pages without hugetlb_lock even though that shared counter requires the lock. Exploitation requires local low-privileged access and concurrent huge-page allocation; public sources report counter corruption but no specific crash mode.

The record

CVE
CVE-2022-50285
Published
Sep 15, 2025
Updated
Sep 15, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 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=3f5fae4d1a3189d95b02b4b45e1218df147122bc
  2. Affected versionversion=4.4
  3. Affected versionversion=a88c769548047b21f76fd71e04b6a3300ff17160 <112a005d1ded04a4b41b6d01833cc0bda90625cc
  4. Affected versionversion=a88c769548047b21f76fd71e04b6a3300ff17160 <11993652d0b49e27272db0a37aa828d8a3a4b92b
  5. Affected versionversion=a88c769548047b21f76fd71e04b6a3300ff17160 <12df140f0bdfae5dcfc81800970dd7f6f632e00c
  6. Affected versionversion=a88c769548047b21f76fd71e04b6a3300ff17160 <2b35432d324898ec41beb27031d2a1a864a4d40e
  7. Affected versionversion=a88c769548047b21f76fd71e04b6a3300ff17160 <3e50a07b6a5fcd39df1534d3fdaca4292a65efe6
  8. Affected versionversion=a88c769548047b21f76fd71e04b6a3300ff17160 <568e3812b1778b4c0c229649b59977d88f400ece
  9. Affected versionversion=a88c769548047b21f76fd71e04b6a3300ff17160 <629c986e19fe9481227c7cdfd9a105bbc104d245
  10. Affected versionversion=a88c769548047b21f76fd71e04b6a3300ff17160 <c828fab903725279aa9dc6ae3d44bb7e4778f92c

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3f5fae4d1a3189d95b02b4b45e1218df147122bc; version=4.4; version=a88c769548047b21f76fd71e04b6a3300ff17160 <112a005d1ded04a4b41b6d01833cc0bda90625cc; version=a88c769548047b21f76fd71e04b6a3300ff17160 <11993652d0b49e27272db0a37aa828d8a3a4b92b; version=a88c769548047b21f76fd71e04b6a3300ff17160 <12df140f0bdfae5dcfc81800970dd7f6f632e00c; version=a88c769548047b21f76fd71e04b6a3300ff17160 <2b35432d324898ec41beb27031d2a1a864a4d40e; version=a88c769548047b21f76fd71e04b6a3300ff17160 <3e50a07b6a5fcd39df1534d3fdaca4292a65efe6; version=a88c769548047b21f76fd71e04b6a3300ff17160 <568e3812b1778b4c0c229649b59977d88f400ece; version=a88c769548047b21f76fd71e04b6a3300ff17160 <629c986e19fe9481227c7cdfd9a105bbc104d245; version=a88c769548047b21f76fd71e04b6a3300ff17160 <c828fab903725279aa9dc6ae3d44bb7e4778f92c

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

T1499Endpoint Denial of Service

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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