CVE-2024-50143Public exploit

Kernel invalid read via UDF length overflow

Published Nov 7, 2024 · Updated Aug 5, 2026

Use of uninitialized data in the Linux kernel UDF filesystem allows local users to trigger an invalid read via a malformed UDF image. udf_current_aext computes an allocation-descriptor length without rejecting overflow, and udf_get_fileshortad later consumes uninitialized data. Triggering requires kernel processing of the crafted filesystem image; the demonstrated result is a KMSAN-detected invalid read, not proven code execution.

CVSS severity7.8
High
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use of uninitialized data in the Linux kernel UDF filesystem allows local users to trigger an invalid read via a malformed UDF image. udf_current_aext computes an allocation-descriptor length without rejecting overflow, and udf_get_fileshortad later consumes uninitialized data. Triggering requires kernel processing of the crafted filesystem image; the demonstrated result is a KMSAN-detected invalid read, not proven code execution.

The record

CVE
CVE-2024-50143
Published
Nov 7, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-908
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Nov 7, 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0ce61b1f6b32df822b59c680cbe8e5ba5d335742
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1ac49babc952f48d82676979b20885e480e69be8
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <264db9d666ad9a35075cc9ed9ec09d021580fbb1
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <417bd613bdbe791549f7687bb1b9b8012ff111c2
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4fc0d8660e391dcd8dde23c44d702be1f6846c61
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5eb76fb98b3335aa5cca6a7db2e659561c79c32b
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <72e445df65a0aa9066c6fe2b8736ba2fcca6dac7
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e52e0b92ed31dc62afbda15c243dcee0bb5bb58d
  9. Affected versionversion=2.6.12

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0ce61b1f6b32df822b59c680cbe8e5ba5d335742; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1ac49babc952f48d82676979b20885e480e69be8; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <264db9d666ad9a35075cc9ed9ec09d021580fbb1; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <417bd613bdbe791549f7687bb1b9b8012ff111c2; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4fc0d8660e391dcd8dde23c44d702be1f6846c61; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5eb76fb98b3335aa5cca6a7db2e659561c79c32b; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <72e445df65a0aa9066c6fe2b8736ba2fcca6dac7; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e52e0b92ed31dc62afbda15c243dcee0bb5bb58d; version=2.6.12

Published CVSS scores

6.6SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H
6.9SUSECVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N
7.8Linux Kernel CNACVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.8CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8NVDCVSS: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

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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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-908Use of Uninitialized Resource

Public exploit references

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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