CVE-2024-46859

Kernel disclosure and corruption via unchecked SINF indexing

Published Sep 27, 2024 · Updated Aug 5, 2026

Out-of-bounds access in the Linux kernel's Panasonic laptop driver allows local users to read or corrupt kernel heap memory via sysfs. The panasonic-laptop sysfs show and store handlers index pcc->sinf for unsupported features without checking the firmware-reported array length. An unprivileged account on a Panasonic laptop with a short SINF firmware array can disclose adjacent slab data, corrupt kernel memory, or crash the host.

CVSS severity7.8
High
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds access in the Linux kernel's Panasonic laptop driver allows local users to read or corrupt kernel heap memory via sysfs. The panasonic-laptop sysfs show and store handlers index pcc->sinf for unsupported features without checking the firmware-reported array length. An unprivileged account on a Panasonic laptop with a short SINF firmware array can disclose adjacent slab data, corrupt kernel memory, or crash the host.

The record

CVE
CVE-2024-46859
Published
Sep 27, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-129, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 27, 2024CVE 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.3
  2. Affected versionversion=e424fb8cc4e6634c10f8159b1ff5618cf7bab9c6 <6821a82616f60aa72c5909b3e252ad97fb9f7e2a
  3. Affected versionversion=e424fb8cc4e6634c10f8159b1ff5618cf7bab9c6 <9291fadbd2720a869b1d2fcf82305648e2e62a16
  4. Affected versionversion=e424fb8cc4e6634c10f8159b1ff5618cf7bab9c6 <b38c19783286a71693c2194ed1b36665168c09c4
  5. Affected versionversion=e424fb8cc4e6634c10f8159b1ff5618cf7bab9c6 <b7c2f692307fe704be87ea80d7328782b33c3cef
  6. Affected versionversion=e424fb8cc4e6634c10f8159b1ff5618cf7bab9c6 <f52e98d16e9bd7dd2b3aef8e38db5cbc9899d6a4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.3; version=e424fb8cc4e6634c10f8159b1ff5618cf7bab9c6 <6821a82616f60aa72c5909b3e252ad97fb9f7e2a; version=e424fb8cc4e6634c10f8159b1ff5618cf7bab9c6 <9291fadbd2720a869b1d2fcf82305648e2e62a16; version=e424fb8cc4e6634c10f8159b1ff5618cf7bab9c6 <b38c19783286a71693c2194ed1b36665168c09c4; version=e424fb8cc4e6634c10f8159b1ff5618cf7bab9c6 <b7c2f692307fe704be87ea80d7328782b33c3cef; version=e424fb8cc4e6634c10f8159b1ff5618cf7bab9c6 <f52e98d16e9bd7dd2b3aef8e38db5cbc9899d6a4

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-129Improper Validation of Array Index
T1068Exploitation for Privilege Escalation

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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