CVE-2023-53103Public exploit

Network-device teardown disruption via cleared bond flags

Published May 2, 2025 · Updated May 11, 2026

Improper flag restoration in Linux kernel bonding allows local users to trigger a kernel warning through crafted network-link changes. When a nested bond rejects a non-Ethernet first slave, the failure path calls ether_setup(), which clears IFF_SLAVE instead of preserving the bond's prior flags. Reaching the path requires local link-reconfiguration access; the corrupted state triggers a warning when the bond is deleted, disrupting normal network-device teardown.

CVSS severity5.5
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper flag restoration in Linux kernel bonding allows local users to trigger a kernel warning through crafted network-link changes. When a nested bond rejects a non-Ethernet first slave, the failure path calls ether_setup(), which clears IFF_SLAVE instead of preserving the bond's prior flags. Reaching the path requires local link-reconfiguration access; the corrupted state triggers a warning when the bond is deleted, disrupting normal network-device teardown.

The record

CVE
CVE-2023-53103
Published
May 2, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 2, 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

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=4.2
  2. Affected versionversion=7d5cd2ce5292b45e555de776cb9e72975a07460d <0276813b8ab08d9bf5ca4159f301d0829ecf13fc
  3. Affected versionversion=7d5cd2ce5292b45e555de776cb9e72975a07460d <93c8cbeb1b2b8ff670b3dfd01b3abd843995c80f
  4. Affected versionversion=7d5cd2ce5292b45e555de776cb9e72975a07460d <e667d469098671261d558be0cd93dca4d285ce1e
  5. Affected versionversion=7d5cd2ce5292b45e555de776cb9e72975a07460d <ecb1b5135bd3f232d5335b3935e2c2ac11bfa02f

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.2; version=7d5cd2ce5292b45e555de776cb9e72975a07460d <0276813b8ab08d9bf5ca4159f301d0829ecf13fc; version=7d5cd2ce5292b45e555de776cb9e72975a07460d <93c8cbeb1b2b8ff670b3dfd01b3abd843995c80f; version=7d5cd2ce5292b45e555de776cb9e72975a07460d <e667d469098671261d558be0cd93dca4d285ce1e; version=7d5cd2ce5292b45e555de776cb9e72975a07460d <ecb1b5135bd3f232d5335b3935e2c2ac11bfa02f

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 exploitPublished

Weakness, pattern, technique

T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

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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