CVE-2026-72047

Kernel crash via truncated FIFO pointer

Published Aug 15, 2026 · Updated Aug 15, 2026

Pointer truncation in the Linux kernel CA8210 debugfs driver allows local users to crash 64-bit systems through FIFO operations. ca8210_test_int_driver_write() and ca8210_test_int_user_read() pass a four-byte count when enqueueing and dequeuing an eight-byte buffer pointer, leaving its upper half uninitialized. The flaw is reachable only when CONFIG_IEEE802154_CA8210_DEBUGFS is enabled on a 64-bit build, and dereferencing the reconstructed pointer generally triggers a kernel oops.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Pointer truncation in the Linux kernel CA8210 debugfs driver allows local users to crash 64-bit systems through FIFO operations. ca8210_test_int_driver_write() and ca8210_test_int_user_read() pass a four-byte count when enqueueing and dequeuing an eight-byte buffer pointer, leaving its upper half uninitialized. The flaw is reachable only when CONFIG_IEEE802154_CA8210_DEBUGFS is enabled on a 64-bit build, and dereferencing the reconstructed pointer generally triggers a kernel oops.

The record

CVE
CVE-2026-72047
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-824, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 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=4.12
  2. Affected versionversion=ded845a781a578dfb0b5b2c138e5a067aa3b1242 <093aacb0c56d5c693e3169a0224062e77c3fd0c0
  3. Affected versionversion=ded845a781a578dfb0b5b2c138e5a067aa3b1242 <1fe2643d0b24ca3cdd61a31a45c2d3233dc6cbfe
  4. Affected versionversion=ded845a781a578dfb0b5b2c138e5a067aa3b1242 <2059c28bd725beded01277cdf1f67be33e714323
  5. Affected versionversion=ded845a781a578dfb0b5b2c138e5a067aa3b1242 <2c1664ccfae653979b38788211240b5a1ee317ed
  6. Affected versionversion=ded845a781a578dfb0b5b2c138e5a067aa3b1242 <65dc342274a01616f5c17105f7360a3b4bfd7a3d
  7. Affected versionversion=ded845a781a578dfb0b5b2c138e5a067aa3b1242 <6d7f7bcf225b2d566176bf6229dbd1252940cb3c
  8. Affected versionversion=ded845a781a578dfb0b5b2c138e5a067aa3b1242 <87dab14a4f68895d6f4d798e6ee3556cd64e8c72
  9. Affected versionversion=ded845a781a578dfb0b5b2c138e5a067aa3b1242 <d8ce67fa6a5e6929f5414e933ff9665176c2bce6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.12; version=ded845a781a578dfb0b5b2c138e5a067aa3b1242 <093aacb0c56d5c693e3169a0224062e77c3fd0c0; version=ded845a781a578dfb0b5b2c138e5a067aa3b1242 <1fe2643d0b24ca3cdd61a31a45c2d3233dc6cbfe; version=ded845a781a578dfb0b5b2c138e5a067aa3b1242 <2059c28bd725beded01277cdf1f67be33e714323; version=ded845a781a578dfb0b5b2c138e5a067aa3b1242 <2c1664ccfae653979b38788211240b5a1ee317ed; version=ded845a781a578dfb0b5b2c138e5a067aa3b1242 <65dc342274a01616f5c17105f7360a3b4bfd7a3d; version=ded845a781a578dfb0b5b2c138e5a067aa3b1242 <6d7f7bcf225b2d566176bf6229dbd1252940cb3c; version=ded845a781a578dfb0b5b2c138e5a067aa3b1242 <87dab14a4f68895d6f4d798e6ee3556cd64e8c72; version=ded845a781a578dfb0b5b2c138e5a067aa3b1242 <d8ce67fa6a5e6929f5414e933ff9665176c2bce6

Published CVSS scores

5.5Red HatCVSS: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-824Access of Uninitialized Pointer
T1499Endpoint Denial of Service

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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