CVE-2026-43048 (GCVE-0-2026-43048)

Vulnerability from cvelistv5 – Published: 2026-05-01 14:15 – Updated: 2026-08-05 12:25
VLAI
Title
HID: core: Mitigate potential OOB by removing bogus memset()
Summary
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]
Severity
8.8 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: cd6104572bca9e4afe0dcdb8ecd65ef90b01297b , < 8f71034649738fdeb6859b8d6cddf132024fac06 (git)
Affected: cd6104572bca9e4afe0dcdb8ecd65ef90b01297b , < bd6e1d0230cca9575f5d118148f51e2a56b5373f (git)
Affected: cd6104572bca9e4afe0dcdb8ecd65ef90b01297b , < 0a3fe972a7cb1404f693d6f1711f32bc1d244b1c (git)
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Linux Linux Affected: 2.6.15
Unaffected: 0 , < 2.6.15 (semver)
Unaffected: 6.18.22 , ≤ 6.18.* (semver)
Unaffected: 6.19.12 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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{
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              "value": "AV:A - The vulnerable HID report parsing can be reached by attacker-controlled Bluetooth HID devices sending crafted short input reports over an established HIDP interrupt/control channel. This is adjacent-network reachability rather than physical-only because Bluetooth HID is a supported HID transport.\nAC:L - The attacker controls the HID report descriptor/report IDs and the short report contents, and no race or condition outside the attacker\u0027s control is required. A malformed report can be sent repeatedly once the HID device is connected.\nPR:N - The adjacent HID peer does not need privileges on the target system to send the report data processed by the kernel. Local HIDP setup is performed by the host Bluetooth stack, but the attacker-controlled peer supplies the malicious descriptor and events.\nUI:N - After the malicious or compromised HID device is connected, exploitation is triggered by device-sent reports without any further victim action. Under the required higher-severity rule, pairing/connection uncertainty is not treated as required interaction.\nS:U - The corruption occurs in the Linux kernel HID processing context and impacts the same kernel security authority. It is not a VM escape, IOMMU bypass, or other cross-scope boundary violation.\nC:H - The bug is an out-of-bounds memory access in kernel report handling, and descriptor-controlled parsing can drive reads beyond the supplied report object. Kernel memory corruption is plausibly usable to obtain sensitive kernel memory disclosure.\nI:H - The removed memset performed an out-of-bounds zero write past short report buffers for some call paths, including small stack/static translated reports. Kernel OOB writes are memory corruption and are defensibly scored as high integrity impact.\nA:H - The OOB write/read can corrupt kernel memory or fault during HID event processing, leading to an oops or system crash. The triggering report can be resent by the attacker-controlled HID peer."
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    "dateReserved": "2026-05-01T14:12:55.979Z",
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    "redhat_vex": {
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      "current_release_date": "2026-07-02T12:26:50+00:00",
      "cve": "CVE-2026-43048",
      "id": "CVE-2026-43048",
      "initial_release_date": "2026-05-01T00:00:00+00:00",
      "product_status:known_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: HID: core: Mitigate potential OOB by removing bogus memset()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43048.json",
      "version": "3"
    },
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      "cve": "CVE-2026-43048",
      "id": "CVE-2026-43048",
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      "product_status:known_affected": "293",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-43048",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-43048.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.