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CVE Record

CVE-2026-43048: HID: core: Mitigate potential OOB by removing bogus memset()

In the Linux kernel, the following vulnerability has been resolved: HID: core: Mitigate potential OOB by removing bogus memset() The memset() in hid_report_raw_event() has the good intention of clearing out bogus data by zeroing the area from the end of the incoming data string to the assumed end of the buffer. However, as we have previously seen, doing so can easily result in OOB reads and writes in the subsequent thread of execution. The current suggestion from one of the HID maintainers is to remove the memset() and simply return if the incoming event buffer size is not large enough to fill the associated report. Suggested-by Benjamin Tissoires <bentiss@kernel.org> [bentiss: changed the return value]

HighCVSS 8.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

A flaw in the Linux kernel’s HID event handling could corrupt or expose memory when a malformed device report is shorter than expected. The supplied CVSS score is 8.8, reflecting possible confidentiality, integrity, and availability impact without privileges or user interaction, but requiring adjacent access.

Executive priority

Treat as a high-priority kernel update for endpoints or systems able to receive untrusted HID input. The technical impact is serious, but the adjacent-access requirement and absence of cited active exploitation reduce immediate enterprise-wide urgency. Use accelerated, risk-based patching rather than emergency incident response solely from this evidence.

Technical view

hid_report_raw_event() attempted to clear trailing report data with memset(). The supplied description warns that this could cause out-of-bounds reads and writes later in execution. The kernel fix removes that memset() and rejects incoming event buffers too small for the associated HID report.

Likely exposure

Exposure is limited to Linux systems running affected kernel versions that process attacker-controlled or malformed HID reports. The supplied version metadata names 2.6.15, 0, 6.18.22, 6.19.12, and 7.0 as affected, but does not provide clear range semantics. Confirm status with the distribution vendor.

Exploitation context

The CVSS vector classifies access as adjacent, with low complexity, no privileges, and no user interaction. The source bundle marks this CVE as absent from KEV and provides no evidence of active exploitation, public proof-of-concept availability, or observed attacks.

Researcher notes

No CWE is assigned in the supplied record. The described condition involves potential out-of-bounds reads and writes caused by clearing memory beyond assumptions about an undersized report. Three Linux stable commits are cited, but the bundle does not map each commit to a specific maintained branch or provide exploitability details beyond CVSS.

Mitigation direction

  • Install a vendor-supported kernel containing the referenced stable fix.
  • Check distribution advisories for exact affected and corrected package versions.
  • Prioritize systems exposed to untrusted or physically accessible HID devices.
  • Restrict untrusted HID device access where updating cannot occur promptly.

Validation and detection

  • Record each system’s running kernel version and distribution package release.
  • Compare versions against current distribution or Linux stable guidance.
  • Confirm the installed kernel includes one applicable referenced fix commit.
  • Reboot after updating and verify the corrected kernel is running.
  • Review kernel logs for abnormal HID processing or memory-fault events.
Prepared
Confidence
medium
Sources
5

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

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

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CVE-2026-43048 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
8.8 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

1CVSS vectors
3Timeline events
0ADP providers
4Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
8.8CVSS 3.1HighCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H2.85.9Linux

Vulnerability scoring details

Base CVSS 3.1 score

8.8High
CVSS 3.1 vector shape for CVE-2026-43048Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

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.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxcd6104572bca9e4afe0dcdb8ecd65ef90b01297b, cd6104572bca9e4afe0dcdb8ecd65ef90b01297b, cd6104572bca9e4afe0dcdb8ecd65ef90b01297bunaffected
LinuxLinux2.6.15, 0, 6.18.22, 6.19.12, 7.0affected
Weakness

CWE details

No CWE listed

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