CVE-2024-44951

Cross-channel serial data corruption via shared buffer

Published Sep 4, 2024 · Updated Aug 5, 2026

Improper locking in the Linux kernel sc16is7xx serial driver allows local users to corrupt transmitted data across IC channels. Per-channel EFR locking leaves a data buffer shared by transmit and receive handlers, so near-simultaneous reception on one channel can replace another channel's pending transmission. Exploitation requires a multichannel SC16IS7xx device and precisely timed traffic; the observed consequence is cross-channel data substitution.

CVSS severity7.8
High
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper locking in the Linux kernel sc16is7xx serial driver allows local users to corrupt transmitted data across IC channels. Per-channel EFR locking leaves a data buffer shared by transmit and receive handlers, so near-simultaneous reception on one channel can replace another channel's pending transmission. Exploitation requires a multichannel SC16IS7xx device and precisely timed traffic; the observed consequence is cross-channel data substitution.

The record

CVE
CVE-2024-44951
Published
Sep 4, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-667, T1565
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 4, 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

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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=4409df5866b7ff7686ba27e449ca97a92ee063c9 <09cfe05e9907f3276887a20e267cc40e202f4fdd
  2. Affected versionversion=4409df5866b7ff7686ba27e449ca97a92ee063c9 <133f4c00b8b2bfcacead9b81e7e8edfceb4b06c4
  3. Affected versionversion=4b068e55bf5ea7bab4d8a282c6a24b03e80c0b68
  4. Affected versionversion=6.1.76 <6.2
  5. Affected versionversion=6.6.15 <6.7
  6. Affected versionversion=6.7.3 <6.8
  7. Affected versionversion=6.8
  8. Affected versionversion=9879e1bec3c0f077427dd0d258c80c63ce9babdf
  9. Affected versionversion=dbe196ca489f3833e0f9eeb86ac346194f131c91

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4409df5866b7ff7686ba27e449ca97a92ee063c9 <09cfe05e9907f3276887a20e267cc40e202f4fdd; version=4409df5866b7ff7686ba27e449ca97a92ee063c9 <133f4c00b8b2bfcacead9b81e7e8edfceb4b06c4; version=4b068e55bf5ea7bab4d8a282c6a24b03e80c0b68; version=6.1.76 <6.2; version=6.6.15 <6.7; version=6.7.3 <6.8; version=6.8; version=9879e1bec3c0f077427dd0d258c80c63ce9babdf; version=dbe196ca489f3833e0f9eeb86ac346194f131c91

Published CVSS scores

7.8kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8NIST NVDCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-667Improper Locking
T1565Data Manipulation

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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