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Public proof of conceptFix available

CVE-2023-2008

A public proof of concept exists; no exploitation attested.

  • Published2023-04-14
  • Fixed in5.19 · 5.18.8 · 5.15.51 · 5.10.127 · 5.4.202
  • WeaknessCWE-129

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A flaw was found in the Linux kernel's udmabuf device driver, within a fault handler. This issue occurs due to the lack of proper validation of user-supplied data, which can result in memory access past the end of an array. This may allow an attacker to escalate privileges and execute arbitrary code in the context of the kernel.

Timeline

dates in UTC
  1. 2023-04-1421:15CVE publishedNVD
  2. 2026-10-2319:23First public proof of conceptPoC-in-GitHub

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-2008?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-2008?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Linux linux kernel
BranchAffectedFixed in
5.19< 5.195.19
5.x≥ 5.16, < 5.18.85.18.8
5.x≥ 5.11, < 5.15.515.15.51
5.x≥ 5.5, < 5.10.1275.10.127
5.4≥ 4.20, < 5.4.2025.4.202
5.19= 5.19no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. Update Linux linux kernel to 5.19 · 5.18.8 · 5.15.51 · 5.10.127 · 5.4.202

Advisories and patches

Detection

read 2026-10-23 19:23 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
1 repository, unverifiedbluefrostsecurity/CVE-2023-2008
PoC-in-GitHub

Sources

  • CISA-ADPSSVC decisionnone2025-04-23
  • OpenCVESSVC decisionnone—
  • CISA-ADPCVSS 3.17.82025-05-05
  • NVDCVSS 3.18.2read 2026-10-23
  • CNAweakness (CWE)CWE-129read 2026-10-23
  • NVDweakness (CWE)CWE-129read 2026-10-23
  • FIRST EPSSEPSS score1.0 %2026-10-22
  • PoC-in-GitHubproof of concept1read 2026-10-23

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Published
2023-04-14
Last Modified
2026-08-10
NVD status
Modified

Frequently asked questions

What is CVE-2023-2008?

A flaw was found in the Linux kernel's udmabuf device driver, within a fault handler. This issue occurs due to the lack of proper validation of user-supplied data, which can result in memory access past the end of an array. This may allow an attacker to escalate privileges and execute arbitrary code in the context of the kernel.

Is CVE-2023-2008 actively exploited?

Active exploitation of CVE-2023-2008 has not been confirmed. Its EPSS score was 1.0% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-2008?

CVE-2023-2008 has a CVSS v3 base score of 8.2 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H.

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