How severe is CVE-2013-4247?

CVE-2013-4247 has a CVSS 2.0 base score of 7.8, rated high severity.

Is CVE-2013-4247 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-4247?

CVE-2013-4247 affects Linux Linux Kernel. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2013-4247?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2013-4247 published?

CVE-2013-4247 was published on 2013-08-25 and last updated on 2026-06-16.

CVE-2013-4247

CVE-2013-4247 is a high-severity vulnerability in Linux Linux Kernel with a CVSS 2.0 base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-189.

Key facts

Severity: High (CVSS 2.0 base score 7.8)
EPSS exploit prediction: 4% (88th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-189
Affected product: Linux Linux Kernel
Published: 2013-08-25
Last modified: 2026-06-16

Description

Off-by-one error in the build_unc_path_to_root function in fs/cifs/connect.c in the Linux kernel before 3.9.6 allows remote attackers to cause a denial of service (memory corruption and system crash) via a DFS share mount operation that triggers use of an unexpected DFS referral name length.

Frequently asked questions

What is CVE-2013-4247?: Off-by-one error in the build_unc_path_to_root function in fs/cifs/connect.c in the Linux kernel before 3.9.6 allows remote attackers to cause a denial of service (memory corruption and system crash) via a DFS share mount operation that triggers use of an unexpected DFS referral name length.
How severe is CVE-2013-4247?: CVE-2013-4247 has a CVSS 2.0 base score of 7.8, rated high severity.
Is CVE-2013-4247 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-4247?: CVE-2013-4247 affects Linux Linux Kernel. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2013-4247?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2013-4247 published?: CVE-2013-4247 was published on 2013-08-25 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

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