CVE-2024-50177

Display-mode validation failure via cursor-width underflow

Published Nov 8, 2024 · Updated May 11, 2026

Integer overflow in Linux 6.11 through 6.11.2 allows local users to interrupt display processing through phantom-pipe programming. The DML2.1 calculate_cursor_req_attributes logic subtracts from the zero cursor_width value and uses the wrapped result as a 32-bit shift exponent. Reachability requires an AMD display path that programs a phantom pipe; the observed consequence is a UBSAN shift-out-of-bounds failure in kernel display-mode validation.

CVSS severity5.5
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer overflow in Linux 6.11 through 6.11.2 allows local users to interrupt display processing through phantom-pipe programming. The DML2.1 calculate_cursor_req_attributes logic subtracts from the zero cursor_width value and uses the wrapped result as a 32-bit shift exponent. Reachability requires an AMD display path that programs a phantom pipe; the observed consequence is a UBSAN shift-out-of-bounds failure in kernel display-mode validation.

The record

CVE
CVE-2024-50177
Published
Nov 8, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-190, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 8, 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=6.11
  2. Affected versionversion=70839da6360500a82e4d5f78499284474cbed7c1 <27bc3da5eae57e3af8f5648b4498ffde48781434
  3. Affected versionversion=70839da6360500a82e4d5f78499284474cbed7c1 <eaf3adb8faab611ba57594fa915893fc93a7788c

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.11; version=70839da6360500a82e4d5f78499284474cbed7c1 <27bc3da5eae57e3af8f5648b4498ffde48781434; version=70839da6360500a82e4d5f78499284474cbed7c1 <eaf3adb8faab611ba57594fa915893fc93a7788c

Published CVSS scores

5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NISTCVSS: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-190Integer Overflow or Wraparound
T1499Endpoint Denial of Service

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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