7.8

CVE-2023-0386: Linux Kernel Improper Ownership Management Vulnerability

KEV
Analyzed
AliasesRHSA-2023:1681RHSA-2023:1691RHSA-2023:1703
Published 22-03-2023Last modified 21-10-2025

Vulnerability summary

CVE-2023-0386 is a high (CVSS 7.8) Improper Ownership Management vulnerability in Linux Kernel. It is known to be exploited: CISA lists it, first on 17-06-2025. EPSS estimates a 7.88% chance of exploitation in the next 30 days, higher than 94.7% of scored vulnerabilities. 1 public exploit is recorded.

Priority
Act nowlisted as exploited

Listed as exploited by CISA (17-06-2025)

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
7.88%
0%100%
Low · 0.00 pp in 30 days
KEVExploited in the wildCritical · listed in 1 catalog
RansomwareNot flaggedNo ransomware use recorded.
Public exploits1metasploit

Advisory lineage

Upstream 0 · Downstream 32 · Related 22
DLA-3446-1DLA-3840-1DSA-5402-1LSN-0095-1RHSA-2023:1554RHSA-2023:1566

Timeline

  1. 22-03-2023
    PublishedVulnerability first disclosed.
  2. 17-06-2025
    Added to CISA KEVExploitedLinux Kernel Improper Ownership Management Vulnerability
  3. 08-07-2025
    CISA remediation dueDeadline passedApply mitigations per vendor instructions.
  4. 21-10-2025
    Last modifiedVulnerability information updated.

Description

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 metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

7.88%

Chance of exploitation in the next 30 days

Percentile

95%

Versus all other CVEs

30-day change

No change 0.00 pp

From 7.88% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEVListed
Added
17-06-2025
Federal due date
08-07-2025
ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

CISA required action

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. access.redhat.com/security/cve/cve-2023-0386 security.netapp.com/advisory/ntap-20230420-0004/ nvd.nist.gov/vuln/detail/CVE-2023-0386

Public exploits

1 found
  • MetasploitMetasploitremoteVerified

    Local Privilege Escalation via CVE-2023-0386

    exploit/linux/local/cve_2023_0386_overlayfs_priv_esc

    Maturity: weaponized

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Redhat79 products
  • bpftool< 0:5.14.0-162.23.1.el9_1 | < 0:5.14.0-70.53.1.el9_0
  • bpftool-debuginfo< 0:5.14.0-162.23.1.el9_1 | < 0:5.14.0-70.53.1.el9_0
  • kernel< 0:5.14.0-162.23.1.el9_1 | < 0:5.14.0-70.53.1.el9_0
  • kernel-abi-stablelists< 0:5.14.0-162.23.1.el9_1 | < 0:5.14.0-70.53.1.el9_0
  • kernel-core< 0:5.14.0-162.23.1.el9_1 | < 0:5.14.0-70.53.1.el9_0
Ubuntu73 products
  • linux< 5.15.0-70.77
  • linux-aws< 5.15.0-1034.38
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
  • linux-aws-5.13All versions (No fix recorded)
Netapp5 products
Debian2 products
Canonical1 product
Linux1 product
  • linux_kernel≥ 5.11, < 5.15.91 | ≥ 5.16, < 6.1.9 | 6.2:rc1 | 6.2:rc2 | 6.2:rc3 | 6.2:rc4 | 6.2:rc5

6 vendors · 161 products

References

35 links
Show all 35 references