CVE-2026-53337

Service interruption via unchecked bonding slave pointer

Published Jul 1, 2026 · Updated Jul 1, 2026

NULL pointer dereference in the Linux Kernel bonding driver allows local users to trigger a kernel oops through a bonding ioctl. bond_do_ioctl() accepts a nonexistent slave interface name, then slave_dbg() dereferences slave_dev->name before checking whether __dev_get_by_name() returned NULL. Reaching the fault requires CAP_NET_ADMIN; the reported consequence is a kernel oops and service interruption, not data disclosure or modification.

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

NULL pointer dereference in the Linux Kernel bonding driver allows local users to trigger a kernel oops through a bonding ioctl. bond_do_ioctl() accepts a nonexistent slave interface name, then slave_dbg() dereferences slave_dev->name before checking whether __dev_get_by_name() returned NULL. Reaching the fault requires CAP_NET_ADMIN; the reported consequence is a kernel oops and service interruption, not data disclosure or modification.

The record

CVE
CVE-2026-53337
Published
Jul 1, 2026
Updated
Jul 1, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Jul 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 1, 2026Record 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=5.3
  2. Affected versionversion=e2a7420df2e01370b40e4cf7b85ab9a885c6d755 <1b7558c85493467b2ea20738866b822db6442034
  3. Affected versionversion=e2a7420df2e01370b40e4cf7b85ab9a885c6d755 <66693957bacd1c9dae6188a7312d6be69a221f2d
  4. Affected versionversion=e2a7420df2e01370b40e4cf7b85ab9a885c6d755 <a629418d463fb50d132a1aa063b0105857311e5f
  5. Affected versionversion=e2a7420df2e01370b40e4cf7b85ab9a885c6d755 <a764b0e8317a863006e05732e1aefe821b9d8c2d
  6. Affected versionversion=e2a7420df2e01370b40e4cf7b85ab9a885c6d755 <b02b2e3e876c18733b868a29064abd11cdbf8feb
  7. Affected versionversion=e2a7420df2e01370b40e4cf7b85ab9a885c6d755 <b0878106ddc486375084145848ff255dedfff46a
  8. Affected versionversion=e2a7420df2e01370b40e4cf7b85ab9a885c6d755 <bcb8fad90f27300add583a8371db504b766d95c7
  9. Affected versionversion=e2a7420df2e01370b40e4cf7b85ab9a885c6d755 <c2cfe290fdb1c32a4f4eb2b8ca3f363b305d21ba

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linux Kernelversion=5.3; version=e2a7420df2e01370b40e4cf7b85ab9a885c6d755 <1b7558c85493467b2ea20738866b822db6442034; version=e2a7420df2e01370b40e4cf7b85ab9a885c6d755 <66693957bacd1c9dae6188a7312d6be69a221f2d; version=e2a7420df2e01370b40e4cf7b85ab9a885c6d755 <a629418d463fb50d132a1aa063b0105857311e5f; version=e2a7420df2e01370b40e4cf7b85ab9a885c6d755 <a764b0e8317a863006e05732e1aefe821b9d8c2d; version=e2a7420df2e01370b40e4cf7b85ab9a885c6d755 <b02b2e3e876c18733b868a29064abd11cdbf8feb; version=e2a7420df2e01370b40e4cf7b85ab9a885c6d755 <b0878106ddc486375084145848ff255dedfff46a; version=e2a7420df2e01370b40e4cf7b85ab9a885c6d755 <bcb8fad90f27300add583a8371db504b766d95c7; version=e2a7420df2e01370b40e4cf7b85ab9a885c6d755 <c2cfe290fdb1c32a4f4eb2b8ca3f363b305d21ba

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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