CVE-2012-6547

NONECVSS 0.0

0.0

The __tun_chr_ioctl function in drivers/net/tun.c in the Linux kernel before 3.6 does not initialize a certain structure, which allows local users to obtain sensitive information from kernel stack memory via a crafted application.

CVSS v3: —
EG Score: 0.0(none)
EPSS: 5.8%
KEV: Not listed

Published

March 15, 2013

Last Modified

April 29, 2026

References (12)

cve@mitrehttp://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=a117dacde0288f3ec60b6e5bcedae8fa37ee0dfc
cve@mitrehttp://rhn.redhat.com/errata/RHSA-2013-0744.html
cve@mitrehttp://www.mandriva.com/security/advisories?name=MDVSA-2013:176
cve@mitrehttp://www.openwall.com/lists/oss-security/2013/03/05/13
cve@mitrehttps://github.com/torvalds/linux/commit/a117dacde0288f3ec60b6e5bcedae8fa37ee0dfc
cve@mitrehttps://www.kernel.org/pub/linux/kernel/v3.x/patch-3.6.bz2
af854a3a-2127-422b-91ae-364da2661108http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=a117dacde0288f3ec60b6e5bcedae8fa37ee0dfc
af854a3a-2127-422b-91ae-364da2661108http://rhn.redhat.com/errata/RHSA-2013-0744.html
af854a3a-2127-422b-91ae-364da2661108http://www.mandriva.com/security/advisories?name=MDVSA-2013:176
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2013/03/05/13
af854a3a-2127-422b-91ae-364da2661108https://github.com/torvalds/linux/commit/a117dacde0288f3ec60b6e5bcedae8fa37ee0dfc
af854a3a-2127-422b-91ae-364da2661108https://www.kernel.org/pub/linux/kernel/v3.x/patch-3.6.bz2

Patch Availability(9)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	linux-image-2.6.32-350-ec2 (2.6.32-350.57) @ lucid	2026-05-29	ubuntu
ubuntu	linux-image-2.6.32-45-versatile (2.6.32-45.100) @ lucid	2026-05-29	ubuntu
ubuntu	linux-image-3.2.0-31-powerpc-smp (3.2.0-31.50) @ precise	2026-05-29	ubuntu
ubuntu	linux-image-3.2.0-1419-omap4 (3.2.0-1419.26) @ precise	2026-05-29	ubuntu
ubuntu	linux-image-3.0.0-1215-omap4 (3.0.0-1215.27) @ oneiric	2026-05-29	ubuntu
ubuntu	linux-image-3.0.0-25-virtual (3.0.0-25.41~lucid1) @ lucid	2026-05-29	ubuntu
ubuntu	linux-image-3.0.0-25-omap (3.0.0-25.41) @ oneiric	2026-05-29	ubuntu
redhat	kernel-0:2.6.32-358.6.1.el6	2013-04-23	redhat
redhat	kernel-0:2.6.18-348.4.1.el5	2013-04-16	redhat

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.

CWE-200Exposure of Sensitive Information to an Unauthorized Actor

All Vendor Advisories

(9)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 10× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:10 UTCepss_batch
2026-06-02 20:10 UTCepss_batch
2026-06-01 13:49 UTCepss_batch
2026-06-01 13:49 UTCepss_batch
2026-05-31 22:28 UTCepss_batch
2026-05-31 22:28 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-29 13:41 UTCepss_batch
2026-05-29 13:41 UTCepss_batch
2026-05-29 00:37 UTCEG score recompute
2026-05-29 00:37 UTCVendor advisory
2026-05-29 00:37 UTCGHSA enrichment
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-27 09:14 UTCOSV refresh
2026-05-26 13:41 UTCepss_batch

Frequently asked(4)

What is CVE-2012-6547?

CVE-2012-6547 is a none vulnerability published on March 15, 2013. The tunchrioctl function in drivers/net/tun.c in the Linux kernel before 3.6 does not initialize a certain structure, which allows local users to obtain sensitive information from kernel stack memory via a crafted application.

When was CVE-2012-6547 disclosed?

CVE-2012-6547 was first published in the National Vulnerability Database on March 15, 2013, 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-2012-6547 actively exploited?

CVE-2012-6547 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 5.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-2012-6547?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2012-6547, 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.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2012-6547

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CVE-2012-6547

Published

Last Modified

References (12)

Patch Availability(9)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

Frequently asked(4)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2012-6547?

Same vendor

Same CWE

CVE-2012-6547

📅 Published

🔄 Last Modified

🔗 References (12)

Patch Availability(9)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

❓ Frequently asked(4)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2012-6547?

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References (12)

Frequently asked(4)

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