High 7.8Known exploited (CISA KEV)Published Mar 21, 2023

CVE-2023-0386A 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 capabl…

Updated under an hour ago (Oct 27, 2026, 3:00 AM ET)

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It affects debian_linux and 7 other products. Add what you run to find out whether that includes you.

CISA lists it as known exploited since Jun 17, 2025; federal agencies had to remediate by Jul 8, 2025. Treat that date as your deadline.

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Exploited in the last 30 days

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.

CVSS: 7.8 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-282
Known exploited: Added to CISA KEV Jun 17, 2025; federal remediation due Jul 8, 2025Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
EPSS (exploitation in the next 30 days): 7.88% (percentile 95)
Assigned by: redhat
NVD analysis: Analyzed
Record last updated: Oct 21, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

debian debian_linux debian:debian_linux	10.0	NVD
netapp h300s_firmware netapp:h300s_firmware	all versions	NVD
netapp h500s_firmware netapp:h500s_firmware	all versions	NVD
netapp h700s_firmware netapp:h700s_firmware	all versions	NVD
netapp h410s_firmware netapp:h410s_firmware	all versions	NVD
netapp h410c_firmware netapp:h410c_firmware	all versions	NVD
canonical ubuntu_linux canonical:ubuntu_linux	18.04; 20.04; 22.04	NVD
linux linux_kernel linux:linux_kernel	from 5.11 before 5.15.91; from 5.16 before 6.1.9; 6.2; 6.2; 6.2; 6.2; 6.2	NVD

References

References

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4f11ada10d0a	broken-link, mailing-list, patch, vendor-advisory
https://security.netapp.com/advisory/ntap-20230420-0004/	third-party-advisory
https://www.debian.org/security/2023/dsa-5402	vendor-advisory, third-party-advisory
https://lists.debian.org/debian-lts-announce/2023/06/msg00008.html	mailing-list, third-party-advisory
http://packetstormsecurity.com/files/173087/Kernel-Live-Patch-Security-Notice-LSN-0095-1.html	third-party-advisory
https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html	mailing-list, third-party-advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-0386	us-government-resource

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.