CASCACascade Atlas

Evidence dossier

CVE-2023-0386

CVE-2023-0386

65.1–80.1Priority evidence range
As known Jul 19, 2026, 5:00 AM UTCgen-56ccdaf9

Normalized restatement

A flaw was found in the Linux kernel, where unauthorized access to the execution of the setuid file with capabilities was found in the Linux kernel’s OverlayFS subsystem in how a user copies a capable file from a nosuid mount into another mount. This uid mapping bug allows a local user to escalate their privileges on the system.

State
PUBLISHED
Published
Mar 22, 2023
Updated
Oct 21, 2025
Evidence coverage
85%
CISA KEVCatalog member

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

FIRST EPSS7.88%

2026-07-18 · v2026.06.15 · percentile 94.1%

Source stateNo scored conflict

Distinct CVSS assessments remain side by side; none are averaged.

Source comparison

Who said what

CISA-ADPindependent enrichment
container

CISA ADP Vulnrichment

CVEderivative copy
container

CVE Program Container

redhatoriginal assertion
container

A flaw was found in the Linux kernel, where unauthorized access to the execution of the setuid file with capabilities was found in the Linux kernel’s OverlayFS subsystem in how a user copies a capable file from a nosuid mount into another mount. This uid mapping bug allows a local user to escalate their privileges on the system.

CISA KEVoriginal assertion
observed_exploitation

Linux Kernel Improper Ownership Management Vulnerability

FIRST EPSSoriginal assertion
model_probability

Probability 0.078800000000; percentile 0.940560000000

Applicability

Cited product scope

Trace impact →
n/aKernel
[{"status": "affected", "version": "Linux kernel 6.2-rc6"}]unknown
Unknown vendorUnknown product
cpe:2.3:h:netapp:h300s:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:netapp:h410c:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:netapp:h410s:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:netapp:h500s:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:netapp:h700s:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:canonical:ubuntu_linux:22.04:*:*:*:lts:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*; start including 5.11; end excluding 5.15.91supported
Unknown vendorUnknown product
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*; start including 5.16; end excluding 6.1.9supported
Unknown vendorUnknown product
cpe:2.3:o:linux:linux_kernel:6.2:rc1:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:linux:linux_kernel:6.2:rc2:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:linux:linux_kernel:6.2:rc3:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:linux:linux_kernel:6.2:rc4:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:linux:linux_kernel:6.2:rc5:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:netapp:h410c_firmware:-:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:*supported

Assessments

CVSS by origin

7.8
nvd@nist.govCVSS 3.1 · role PrimaryCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8
134c704f-9b21-4f2e-91b3-4a467353bcc0CVSS 3.1 · role SecondaryCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8
CISA-ADPCVSS 3.1 · role unknownCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Limitations and unknowns

  • KEV membership is authoritative for the catalog, not proof of exposure in any environment.
  • EPSS is a dated model probability and not an individual-environment prediction.
  • Affected or fixed status applies only to the exact cited product and version scope; unresolved scope remains unknown.
  • NVD-carried upstream facts remain derivative and are not independent corroboration.
  • Only NVD metrics validated under the generation-bound calculator are Public Priority eligible; direct CVE record metrics remain display-only.
  • NVD CVSS source eligibility is closed: NVD-authored, exact record-source, or registered same-CVE container origin; unmapped sources remain display-only.
  • Factor D is unknown in Public Core because no accepted canonical mapping-obligation ledger is present.
  • Core replay supports the active and immediately prior generation; retrospective valid-at replay is deferred.