CVE-2026-23445

Kernel page fault via stale XDP metadata

Published Apr 3, 2026 · Updated Apr 3, 2026

Denial of service in the Linux kernel igc driver from 6.10 allows local users to trigger a page fault during XDP TX timestamp shutdown. TX-ring shutdown leaves xsk_meta pointers stale, and igc_ptp_tx_tstamp_event dereferences them from the interrupt handler after teardown. The condition requires an XDP application that requested TX timestamping to shut down while the interface link remains up; other queues remain unaffected.

CVSS severity7.8
High
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in the Linux kernel igc driver from 6.10 allows local users to trigger a page fault during XDP TX timestamp shutdown. TX-ring shutdown leaves xsk_meta pointers stale, and igc_ptp_tx_tstamp_event dereferences them from the interrupt handler after teardown. The condition requires an XDP application that requested TX timestamping to shut down while the interface link remains up; other queues remain unaffected.

The record

CVE
CVE-2026-23445
Published
Apr 3, 2026
Updated
Apr 3, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 3, 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=15fd021bc4270273d8f4b7f58fdda8a16214a377 <31521c124e6488c4a81658e35199feb75a988d86
  2. Affected versionversion=15fd021bc4270273d8f4b7f58fdda8a16214a377 <45b33e805bd39f615d9353a7194b2da5281332df
  3. Affected versionversion=15fd021bc4270273d8f4b7f58fdda8a16214a377 <5e4c90c94eb766d70e30694b7fe66862aabaf24b
  4. Affected versionversion=15fd021bc4270273d8f4b7f58fdda8a16214a377 <b02fa17d1744d19cd3820bdbf6ec5d85547977bf
  5. Affected versionversion=6.10

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=15fd021bc4270273d8f4b7f58fdda8a16214a377 <31521c124e6488c4a81658e35199feb75a988d86; version=15fd021bc4270273d8f4b7f58fdda8a16214a377 <45b33e805bd39f615d9353a7194b2da5281332df; version=15fd021bc4270273d8f4b7f58fdda8a16214a377 <5e4c90c94eb766d70e30694b7fe66862aabaf24b; version=15fd021bc4270273d8f4b7f58fdda8a16214a377 <b02fa17d1744d19cd3820bdbf6ec5d85547977bf; version=6.10

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.8kernel.orgCVSS: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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

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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