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CVE Record

CVE-2024-46859: platform/x86: panasonic-laptop: Fix SINF array out of bounds accesses

In the Linux kernel, the following vulnerability has been resolved: platform/x86: panasonic-laptop: Fix SINF array out of bounds accesses The panasonic laptop code in various places uses the SINF array with index values of 0 - SINF_CUR_BRIGHT(0x0d) without checking that the SINF array is big enough. Not all panasonic laptops have this many SINF array entries, for example the Toughbook CF-18 model only has 10 SINF array entries. So it only supports the AC+DC brightness entries and mute. Check that the SINF array has a minimum size which covers all AC+DC brightness entries and refuse to load if the SINF array is smaller. For higher SINF indexes hide the sysfs attributes when the SINF array does not contain an entry for that attribute, avoiding show()/store() accessing the array out of bounds and add bounds checking to the probe() and resume() code accessing these.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This is a Linux kernel bug in the Panasonic laptop driver. On some Panasonic Toughbook models with shorter firmware data arrays, the driver could read or write beyond expected bounds. Business exposure is narrow: it mainly concerns Linux systems using this specific laptop hardware and driver.

Executive priority

Treat as targeted remediation, not broad emergency response. Patch through normal kernel maintenance, with higher priority for fleets containing Panasonic Toughbook or similar Panasonic laptops running Linux.

Technical view

The panasonic-laptop platform/x86 driver used SINF array indexes without confirming the array was large enough. The fix refuses to load when the array is too small for required brightness entries, hides unsupported sysfs attributes, and adds bounds checks in probe and resume paths.

Likely exposure

Likely limited to affected Linux kernel builds running the panasonic-laptop driver on Panasonic laptops, especially models with fewer SINF entries such as the Toughbook CF-18. The provided version data is incomplete or ambiguous, so confirm exposure against kernel and distribution advisories.

Exploitation context

The provided sources do not show active exploitation, public exploit availability, or KEV listing. The source bundle describes an out-of-bounds access condition, but does not establish attacker prerequisites, impact beyond kernel driver memory safety risk, or practical exploitability.

Researcher notes

Evidence supports a driver-specific bounds-checking flaw and kernel-side fix. The bundle does not provide CVSS, CWE, exploit evidence, or clear affected-version ranges. Avoid assuming generic server exposure unless the affected driver and hardware are present.

Mitigation direction

  • Update to a kernel build containing the referenced stable fixes.
  • For Debian LTS systems, follow the linked Debian LTS advisory.
  • Check vendor or distribution guidance for exact fixed package versions.
  • Prioritize systems with Panasonic laptop hardware using this driver.

Validation and detection

  • Inventory Linux laptops with Panasonic hardware and the panasonic-laptop driver.
  • Compare running kernel versions against distribution advisories and stable commits.
  • Review package changelogs for the CVE or SINF bounds-check fix.
  • Confirm unsupported sysfs attributes are absent after patching.
Prepared
Confidence
medium
Sources
8

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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CVE-2024-46859 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
3Timeline events
2ADP providers
7Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc
CVECVE Program Container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxe424fb8cc4e6634c10f8159b1ff5618cf7bab9c6, e424fb8cc4e6634c10f8159b1ff5618cf7bab9c6, e424fb8cc4e6634c10f8159b1ff5618cf7bab9c6, e424fb8cc4e6634c10f8159b1ff5618cf7bab9c6, e424fb8cc4e6634c10f8159b1ff5618cf7bab9c6unaffected
LinuxLinux3.3, 0, 5.15.168, 6.1.111, 6.6.52, 6.10.11, 6.11affected
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.