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Vulnerabilities

Vulnerability · CVE-2026-3836

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Published Jul 31, 2026 · catalog updated Jul 31, 2026 · Linux

Patch now

CVE-2026-3836 is in the CISA known-exploited catalog. Confirm Linux against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
  • EPSS is missing. A missing score is not a low risk.
Severity
Unknown—
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
Not in the current FIRST EPSS dataset
Remediation
Remediation guidance
Affected products
vendor Linux dnf5

A local, unprivileged attacker can exploit a path traversal flaw in the D-Bus locale configuration, crashing dnf5daemon-server via a crafted string. This can lead to a DoS with a core dump.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Linux dnf5version unspecified

How to fix CVE-2026-3836

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2026-3836 is in the CISA known-exploited catalog. Confirm Linux against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Affected version ranges are not on this record. Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

What should an analyst verify?

No weakness class is stored. EPSS is absent from the current FIRST dataset. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jul 31, 2026 · VulnCheck KEV

    Detected

    A local, unprivileged attacker can exploit a path traversal flaw in the D-Bus locale configuration, crashing dnf5daemon-server via a crafted string. This can lead to a DoS with a core dump.

  2. Jul 31, 2026 · CISA KEV

    Known exploited

    Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

Sources

  • CVE.orgVulnerability recordCVE-2026-3836

    Official CVE identifier

    cve.org
  • VulnCheck KEVConfirmed exploitationCVE-2026-3836

    A local, unprivileged attacker can exploit a path traversal flaw in the D-Bus locale configuration, crashing dnf5daemon-server via a crafted string. This can lead to a DoS with a core dump.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.