CVE-2022-50330

Kernel-memory disclosure and crash via firmware length overflow

Published Sep 15, 2025 · Updated Sep 15, 2025

Integer overflow in the Cavium CPT driver in Linux allows local users to read kernel memory or crash the system through crafted firmware. cpt_ucode_load_fw multiplies the firmware-controlled code_length by two without first bounding it, then uses the wrapped code_size for allocation and copying without checking the firmware-file size. Exploitation requires write access to a fixed-name firmware blob on an affected ThunderX or Octeon-TX host and a subsequent device probe, bind, or boot.

CVSS severity7.1
High
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

Integer overflow in the Cavium CPT driver in Linux allows local users to read kernel memory or crash the system through crafted firmware. cpt_ucode_load_fw multiplies the firmware-controlled code_length by two without first bounding it, then uses the wrapped code_size for allocation and copying without checking the firmware-file size. Exploitation requires write access to a fixed-name firmware blob on an affected ThunderX or Octeon-TX host and a subsequent device probe, bind, or boot.

The record

CVE
CVE-2022-50330
Published
Sep 15, 2025
Updated
Sep 15, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-190
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=4.11
  2. Affected versionversion=9e2c7d99941d000a36f68a3594cec27a1bbea274 <172c8a24fc8312cf6b88d3c88469653fdcb1c127
  3. Affected versionversion=9e2c7d99941d000a36f68a3594cec27a1bbea274 <2526d6bf27d15054bb0778b2f7bc6625fd934905
  4. Affected versionversion=9e2c7d99941d000a36f68a3594cec27a1bbea274 <371fa5129af53a79f6dddc90fe5bb0825cbe72a4
  5. Affected versionversion=9e2c7d99941d000a36f68a3594cec27a1bbea274 <3a720eb89026c5241b8c4abb33370dc6fb565eee
  6. Affected versionversion=9e2c7d99941d000a36f68a3594cec27a1bbea274 <584561e94260268abe1c83e00d9c205565cb7bc5
  7. Affected versionversion=9e2c7d99941d000a36f68a3594cec27a1bbea274 <90e483e7f20c32287d2a9da967e122938f52737a
  8. Affected versionversion=9e2c7d99941d000a36f68a3594cec27a1bbea274 <c4d4c2afd08dfb3cd1c880d1811ede2568e81a6d
  9. Affected versionversion=9e2c7d99941d000a36f68a3594cec27a1bbea274 <e29fd7a6852376d2cfb95ad5d6d3eeff93f815e9

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.11; version=9e2c7d99941d000a36f68a3594cec27a1bbea274 <172c8a24fc8312cf6b88d3c88469653fdcb1c127; version=9e2c7d99941d000a36f68a3594cec27a1bbea274 <2526d6bf27d15054bb0778b2f7bc6625fd934905; version=9e2c7d99941d000a36f68a3594cec27a1bbea274 <371fa5129af53a79f6dddc90fe5bb0825cbe72a4; version=9e2c7d99941d000a36f68a3594cec27a1bbea274 <3a720eb89026c5241b8c4abb33370dc6fb565eee; version=9e2c7d99941d000a36f68a3594cec27a1bbea274 <584561e94260268abe1c83e00d9c205565cb7bc5; version=9e2c7d99941d000a36f68a3594cec27a1bbea274 <90e483e7f20c32287d2a9da967e122938f52737a; version=9e2c7d99941d000a36f68a3594cec27a1bbea274 <c4d4c2afd08dfb3cd1c880d1811ede2568e81a6d; version=9e2c7d99941d000a36f68a3594cec27a1bbea274 <e29fd7a6852376d2cfb95ad5d6d3eeff93f815e9

Published CVSS scores

7.1kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-190Integer Overflow or Wraparound

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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