CVE-2022-48978

System crash via oversized HID field width

Published Oct 21, 2024 · Updated May 11, 2026

Out-of-bounds shifting in the Linux kernel HID core allows local users to crash the system through a crafted HID input report. In snto32() within drivers/hid/hid-core.c, an HID field width above 32 reaches a 32-bit sign-extension shift without being clamped, producing an excessive shift exponent. Reachability requires local access to deliver a malformed HID report; successful triggering interrupts availability without reported data disclosure or modification.

CVSS severity5.5
Medium
EPSS probability0.25%
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 shifting in the Linux kernel HID core allows local users to crash the system through a crafted HID input report. In snto32() within drivers/hid/hid-core.c, an HID field width above 32 reaches a 32-bit sign-extension shift without being clamped, producing an excessive shift exponent. Reachability requires local access to deliver a malformed HID report; successful triggering interrupts availability without reported data disclosure or modification.

The record

CVE
CVE-2022-48978
Published
Oct 21, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-125
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 21, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=2.6.20
  2. Affected versionversion=dde5845a529ff753364a6d1aea61180946270bfa <151493fe5a6ed1a88decc929a7368a3f2a246914
  3. Affected versionversion=dde5845a529ff753364a6d1aea61180946270bfa <2b3b4d7aadaa1b6b58d0f34823bf86cfe8a31b4d
  4. Affected versionversion=dde5845a529ff753364a6d1aea61180946270bfa <809783f8b4b600c7fb3bccb10fefef822601ea3b
  5. Affected versionversion=dde5845a529ff753364a6d1aea61180946270bfa <8e14f20e12224ee2429f75a5c9418a700e26a8d3
  6. Affected versionversion=dde5845a529ff753364a6d1aea61180946270bfa <bc03f809da78fc79e4aee132d4e5c6a2b3aeec73
  7. Affected versionversion=dde5845a529ff753364a6d1aea61180946270bfa <db1ed1b3fb4ec0d19080a102956255769bc45c79
  8. Affected versionversion=dde5845a529ff753364a6d1aea61180946270bfa <ec61b41918587be530398b0d1c9a0d16619397e5
  9. Affected versionversion=dde5845a529ff753364a6d1aea61180946270bfa <f755d11c55b29049b77da5cd9ab2faae96eb33c3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.20; version=dde5845a529ff753364a6d1aea61180946270bfa <151493fe5a6ed1a88decc929a7368a3f2a246914; version=dde5845a529ff753364a6d1aea61180946270bfa <2b3b4d7aadaa1b6b58d0f34823bf86cfe8a31b4d; version=dde5845a529ff753364a6d1aea61180946270bfa <809783f8b4b600c7fb3bccb10fefef822601ea3b; version=dde5845a529ff753364a6d1aea61180946270bfa <8e14f20e12224ee2429f75a5c9418a700e26a8d3; version=dde5845a529ff753364a6d1aea61180946270bfa <bc03f809da78fc79e4aee132d4e5c6a2b3aeec73; version=dde5845a529ff753364a6d1aea61180946270bfa <db1ed1b3fb4ec0d19080a102956255769bc45c79; version=dde5845a529ff753364a6d1aea61180946270bfa <ec61b41918587be530398b0d1c9a0d16619397e5; version=dde5845a529ff753364a6d1aea61180946270bfa <f755d11c55b29049b77da5cd9ab2faae96eb33c3

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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 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-125Out-of-bounds Read

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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