CVE-2011-3363

MEDIUMNVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2022-05-13. NVD baseline CVSS 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
6.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 1%CVSS: 6.5Exploit: NoneExposed: 0

A fix is available — apply it.

The setup_cifs_sb function in fs/cifs/connect.c in the Linux kernel before 2.6.39 does not properly handle DFS referrals, which allows remote CIFS servers to cause a denial of service (system crash) by placing a referral at the root of a share.

CVSS v3
6.5
EG Score
6.5(medium)
EPSS
53.5%
KEV
Not listed

Published

May 24, 2012

Last Modified

April 29, 2026

Advisory Details (3)

Auto-updated May 29, 2026
Patch available. Sources: redhat, github_commit.
github_commit

commit 70945643722f (torvalds/linux)

Fix landed in torvalds/linux commit 70945643722f — awaiting tagged release

https://github.com/torvalds/linux/commit/70945643722ffeac779d2529a348f99567fa5c33
redhat Patch Available

738291 – (CVE-2011-3363) CVE-2011-3363 kernel: cifs: always do is_path_accessible check in cifs_mount

Affected: Red Hat Enterprise Linux 4,

https://bugzilla.redhat.com/show_bug.cgi?id=738291
generic

oss-security - Re: CVE request -- kernel: cifs: always do is_path_accessible check in cifs_mount

http://www.openwall.com/lists/oss-security/2011/09/14/12

Vendor Advisories for CVE-2011-3363(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(14)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-image-2.6.35-903-omap4 (2.6.35-903.26) @ maverick2026-05-29ubuntu
ubuntulinux-image-2.6.32-33-sparc64-smp (2.6.32-33.70) @ lucid2026-05-29ubuntu
ubuntulinux-image-2.6.38-10-generic (2.6.38-10.46) @ natty2026-05-29ubuntu
ubuntulinux-image-2.6.31-611-imx51 (2.6.31-611.29) @ lucid2026-05-29ubuntu
ubuntulinux-image-2.6.38-12-generic (2.6.38-12.51~lucid1) @ lucid2026-05-29ubuntu
ubuntulinux-image-2.6.35-30-virtual (2.6.35-30.61~lucid1) @ lucid2026-05-29ubuntu
ubuntulinux-image-2.6.32-317-ec2 (2.6.32-317.36) @ lucid2026-05-29ubuntu
ubuntulinux-image-2.6.35-30-powerpc (2.6.35-30.61) @ maverick2026-05-29ubuntu
ubuntulinux-image-2.6.32-417-dove (2.6.32-417.34) @ maverick2026-05-29ubuntu
ubuntulinux-image-2.6.32-217-dove (2.6.32-217.34) @ lucid2026-05-29ubuntu
ubuntulinux-image-2.6.38-1209-omap4 (2.6.38-1209.17) @ natty2026-05-29ubuntu
redhatkernel-rt-0:2.6.33.9-rt31.79.el6rt2012-01-10redhat
redhatkernel-0:2.6.18-274.12.1.el52011-11-29redhat
redhatkernel-0:2.6.32-131.21.1.el62011-11-22redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(13)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 8× in last 7d / 41× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-06 16:23 UTCEPSS rescore
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  1. 2026-06-18 17:49 UTCEPSS rescore
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  36. 2026-05-29 04:29 UTCEG score recompute
  37. 2026-05-29 04:29 UTCVendor advisory
  38. 2026-05-29 04:29 UTCGHSA enrichment
  39. 2026-05-28 13:42 UTCEPSS rescore
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  52. 2026-05-18 21:29 UTCEPSS rescore
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Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2011-3363?
CVE-2011-3363 is a medium vulnerability published on May 24, 2012. The setupcifssb function in fs/cifs/connect.c in the Linux kernel before 2.6.39 does not properly handle DFS referrals, which allows remote CIFS servers to cause a denial of service (system crash) by placing a referral at the root of a share.
When was CVE-2011-3363 disclosed?
CVE-2011-3363 was first published in the National Vulnerability Database on May 24, 2012, with the most recent update on April 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2011-3363 actively exploited?
CVE-2011-3363 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 53.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2011-3363?
CVE-2011-3363 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2011-3363?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2011-3363, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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