CVE-2024-47686

Local out-of-bounds read via divisor index

Published Oct 21, 2024 · Updated May 11, 2026

An off-by-one error in the EP93xx clock driver in affected Linux kernel branches allows local users to read beyond a divisor array. ep93xx_div_recalc_rate() accepts an index equal to psc->num_div because its bounds check uses > rather than >=, then reads psc->div[index]. Reachability requires a local low-privileged user and an EP93xx ARM system; published sources establish an out-of-bounds read but do not identify the exposed data or a crash path.

CVSS severity7.1
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An off-by-one error in the EP93xx clock driver in affected Linux kernel branches allows local users to read beyond a divisor array. ep93xx_div_recalc_rate() accepts an index equal to psc->num_div because its bounds check uses > rather than >=, then reads psc->div[index]. Reachability requires a local low-privileged user and an EP93xx ARM system; published sources establish an out-of-bounds read but do not identify the exposed data or a crash path.

The record

CVE
CVE-2024-47686
Published
Oct 21, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-193
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 21, 2024CVE 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

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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=5.16
  2. Affected versionversion=9645ccc7bd7a16cd73c3be9dee70cd702b03be37 <27f493e141823db052586010c1532b70b164507c
  3. Affected versionversion=9645ccc7bd7a16cd73c3be9dee70cd702b03be37 <66e78ade976dbd9bea09166aa8d66afc0963cde4
  4. Affected versionversion=9645ccc7bd7a16cd73c3be9dee70cd702b03be37 <7a5bd2fb92388c51d267f6ce57c40f1cca8af1e0
  5. Affected versionversion=9645ccc7bd7a16cd73c3be9dee70cd702b03be37 <ae59eaf36a1ad396e9f657ec9b8b52da6206ed5f
  6. Affected versionversion=9645ccc7bd7a16cd73c3be9dee70cd702b03be37 <c7f06284a6427475e3df742215535ec3f6cd9662

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.16; version=9645ccc7bd7a16cd73c3be9dee70cd702b03be37 <27f493e141823db052586010c1532b70b164507c; version=9645ccc7bd7a16cd73c3be9dee70cd702b03be37 <66e78ade976dbd9bea09166aa8d66afc0963cde4; version=9645ccc7bd7a16cd73c3be9dee70cd702b03be37 <7a5bd2fb92388c51d267f6ce57c40f1cca8af1e0; version=9645ccc7bd7a16cd73c3be9dee70cd702b03be37 <ae59eaf36a1ad396e9f657ec9b8b52da6206ed5f; version=9645ccc7bd7a16cd73c3be9dee70cd702b03be37 <c7f06284a6427475e3df742215535ec3f6cd9662

Published CVSS scores

2.0SUSECVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
7.1NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
3.3SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
7.1CanonicalCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-193Off-by-one Error

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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