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…

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.

Scores

EPSS (exploitation in 30 days)

3.6% · top 10% of all CVEs (4 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.

Weakness

• n/a
• CWE-189 (opens in a new tab)All about CWE-189 and its CVEs

Affected products

• n/a

  • affected n/a

References (5)

• https://github.com/torvalds/linux/commit/1fc29bacedeabb278080e31bb9c1ecb49f143c3b (opens in a new tab)x_refsource_CONFIRMx_transferred
• https://bugzilla.redhat.com/show_bug.cgi?id=998401 (opens in a new tab)x_refsource_CONFIRMx_transferred
• http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.9.6 (opens in a new tab)x_refsource_CONFIRMx_transferred
• [oss-security] 20130814 Re: CVE Request: Linux kernel: cifs: off-by-one bug in build_unc_path_to_root (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=1fc29bacedeabb278080e31bb9c1ecb49f143c3b (opens in a new tab)x_refsource_CONFIRMx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2013-4247](https://trackcve.app/badge/CVE-2013-4247.svg)](https://trackcve.app/cve/CVE-2013-4247)

Record last updated 6 Aug 2024, 16:38 UTC.