CVE-2024-58069

Kernel memory corruption via undersized NVMEM read

Published Mar 6, 2025 · Updated Aug 5, 2026

An out-of-bounds write in the PCF85063 RTC NVMEM read path in Linux allows local users to corrupt kernel memory through a short read. The driver's NVMEM read callback passes an undersized caller buffer to regmap_read, which stores a four-byte unsigned integer beyond buffers shorter than four bytes. A low-privileged user can trigger the overwrite through the mode-0644 sysfs NVMEM attribute, allowing adjacent kernel data disclosure or a system panic.

CVSS severity7.8
High
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An out-of-bounds write in the PCF85063 RTC NVMEM read path in Linux allows local users to corrupt kernel memory through a short read. The driver's NVMEM read callback passes an undersized caller buffer to regmap_read, which stores a four-byte unsigned integer beyond buffers shorter than four bytes. A low-privileged user can trigger the overwrite through the mode-0644 sysfs NVMEM attribute, allowing adjacent kernel data disclosure or a system panic.

The record

CVE
CVE-2024-58069
Published
Mar 6, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-787, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 6, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=5.2
  2. Affected versionversion=fadfd092ee9138825d8c2a4f95719d2e2e3202b9 <21cd59fcb9952eb7505da2bdfc1eb9c619df3ff4
  3. Affected versionversion=fadfd092ee9138825d8c2a4f95719d2e2e3202b9 <3ab8c5ed4f84fa20cd16794fe8dc31f633fbc70c
  4. Affected versionversion=fadfd092ee9138825d8c2a4f95719d2e2e3202b9 <517aedb365f2c94e2d7e0b908ac7127df76203a1
  5. Affected versionversion=fadfd092ee9138825d8c2a4f95719d2e2e3202b9 <6f2a8ca9a0a38589f52a7f0fb9425b9ba987ae7c
  6. Affected versionversion=fadfd092ee9138825d8c2a4f95719d2e2e3202b9 <9adefa7b9559d0f21034a5d5ec1b55840c9348b9
  7. Affected versionversion=fadfd092ee9138825d8c2a4f95719d2e2e3202b9 <c72b7a474d3f445bf0c5bcf8ffed332c78eb28a1
  8. Affected versionversion=fadfd092ee9138825d8c2a4f95719d2e2e3202b9 <e5536677da803ed54a29a446515c28dce7d3d574
  9. Affected versionversion=fadfd092ee9138825d8c2a4f95719d2e2e3202b9 <e5e06455760f2995b16a176033909347929d1128

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.2; version=fadfd092ee9138825d8c2a4f95719d2e2e3202b9 <21cd59fcb9952eb7505da2bdfc1eb9c619df3ff4; version=fadfd092ee9138825d8c2a4f95719d2e2e3202b9 <3ab8c5ed4f84fa20cd16794fe8dc31f633fbc70c; version=fadfd092ee9138825d8c2a4f95719d2e2e3202b9 <517aedb365f2c94e2d7e0b908ac7127df76203a1; version=fadfd092ee9138825d8c2a4f95719d2e2e3202b9 <6f2a8ca9a0a38589f52a7f0fb9425b9ba987ae7c; version=fadfd092ee9138825d8c2a4f95719d2e2e3202b9 <9adefa7b9559d0f21034a5d5ec1b55840c9348b9; version=fadfd092ee9138825d8c2a4f95719d2e2e3202b9 <c72b7a474d3f445bf0c5bcf8ffed332c78eb28a1; version=fadfd092ee9138825d8c2a4f95719d2e2e3202b9 <e5536677da803ed54a29a446515c28dce7d3d574; version=fadfd092ee9138825d8c2a4f95719d2e2e3202b9 <e5e06455760f2995b16a176033909347929d1128

Published CVSS scores

7.8Linux kernel CNACVSS: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 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-787Out-of-bounds Write
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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