CVE-2022-49581

Kernel heap corruption via oversized EEPROM copy

Published Feb 26, 2025 · Updated Aug 5, 2026

Buffer overflow in the Linux kernel be2net driver allows local users with CAP_NET_ADMIN to corrupt kernel memory through a short EEPROM read. be_cmd_read_port_transceiver_data copies PAGE_DATA_LEN bytes into a smaller caller-allocated buffer because it assumes every buffer has page-sized capacity. The path requires a physical be2net adapter and initial-namespace CAP_NET_ADMIN; corruption can disclose kernel data, alter control flow, or panic the host.

CVSS severity7.8
High
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in the Linux kernel be2net driver allows local users with CAP_NET_ADMIN to corrupt kernel memory through a short EEPROM read. be_cmd_read_port_transceiver_data copies PAGE_DATA_LEN bytes into a smaller caller-allocated buffer because it assumes every buffer has page-sized capacity. The path requires a physical be2net adapter and initial-namespace CAP_NET_ADMIN; corruption can disclose kernel data, alter control flow, or panic the host.

The record

CVE
CVE-2022-49581
Published
Feb 26, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Feb 26, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.18
  2. Affected versionversion=e36edd9d26cf257511548edaf2b7a56eb4fed854 <18043da94c023f3ef09c15017bdb04e8f695ef10
  3. Affected versionversion=e36edd9d26cf257511548edaf2b7a56eb4fed854 <665cbe91de2f7c97c51ca8fce39aae26477c1948
  4. Affected versionversion=e36edd9d26cf257511548edaf2b7a56eb4fed854 <8ff4f9df73e5c551a72ee6034886c17e8de6596d
  5. Affected versionversion=e36edd9d26cf257511548edaf2b7a56eb4fed854 <a5a8fc0679a8fd58d47aa2ebcfc5742631f753f9
  6. Affected versionversion=e36edd9d26cf257511548edaf2b7a56eb4fed854 <a8569f76df7ec5b4b51155c57523a0b356db5741
  7. Affected versionversion=e36edd9d26cf257511548edaf2b7a56eb4fed854 <aba8ff847f4f927ad7a1a1ee4a9f29989a1a728f
  8. Affected versionversion=e36edd9d26cf257511548edaf2b7a56eb4fed854 <d7241f679a59cfe27f92cb5c6272cb429fb1f7ec
  9. Affected versionversion=e36edd9d26cf257511548edaf2b7a56eb4fed854 <fe4473fc7940f14c4a12db873b9729134c212654

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=3.18; version=e36edd9d26cf257511548edaf2b7a56eb4fed854 <18043da94c023f3ef09c15017bdb04e8f695ef10; version=e36edd9d26cf257511548edaf2b7a56eb4fed854 <665cbe91de2f7c97c51ca8fce39aae26477c1948; version=e36edd9d26cf257511548edaf2b7a56eb4fed854 <8ff4f9df73e5c551a72ee6034886c17e8de6596d; version=e36edd9d26cf257511548edaf2b7a56eb4fed854 <a5a8fc0679a8fd58d47aa2ebcfc5742631f753f9; version=e36edd9d26cf257511548edaf2b7a56eb4fed854 <a8569f76df7ec5b4b51155c57523a0b356db5741; version=e36edd9d26cf257511548edaf2b7a56eb4fed854 <aba8ff847f4f927ad7a1a1ee4a9f29989a1a728f; version=e36edd9d26cf257511548edaf2b7a56eb4fed854 <d7241f679a59cfe27f92cb5c6272cb429fb1f7ec; version=e36edd9d26cf257511548edaf2b7a56eb4fed854 <fe4473fc7940f14c4a12db873b9729134c212654

Published CVSS scores

7.8CanonicalCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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

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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