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CVE-2015-7509· NVD / CVE Program· CNA redhat

fs/ext4/namei.c in the Linux kernel before 3.7 allows physically proximate attackers to cause a denial of service (system crash) via a craft

Noroxi assessment

Priority: Monitor (action score 17/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.40% (FIRST EPSS).
  • Someone with local access to the system can trigger it. Administrator privileges are required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: linux (Debian:12) 3.8-1~experimental.1; kernel (Red Hat:enterprise_linux:6::client) 0:2.6.32-642.el6; kernel-abi-whitelists (Red Hat:enterprise_linux:6::client) 0:2.6.32-642.el6.

Low priority for now. Upgrade to linux (Debian:12) 3.8-1~experimental.1; kernel (Red Hat:enterprise_linux:6::client) 0:2.6.32-642.el6; kernel-abi-whitelists (Red Hat:enterprise_linux:6::client) 0:2.6.32-642.el6 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

fs/ext4/namei.c in the Linux kernel before 3.7 allows physically proximate attackers to cause a denial of service (system crash) via a crafted no-journal filesystem, a related issue to CVE-2013-2015.

MediumCVSS 4.4 · v3.0—No exploit Fix available
Published
Dec 28, 2015
Updated
Jun 16, 2026
EPSS
0.4% · 33th percentile

Report tools

JSON

Action score

17

Monitor

Low priority for now.

CVSS
17 / 40 · 4.4 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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When you'll hear from us

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  • when exploit code appears or is weaponized
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  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernelup to 3.6.11 inclusive

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 3.8-1~experimental.13.8-1~experimental.1
Red Hat:enterprise_linux:6::clientkernelbefore 0:2.6.32-642.el60:2.6.32-642.el6
Red Hat:enterprise_linux:6::clientkernel-abi-whitelistsbefore 0:2.6.32-642.el60:2.6.32-642.el6
Red Hat:enterprise_linux:6::clientkernel-debugbefore 0:2.6.32-642.el60:2.6.32-642.el6
Red Hat:enterprise_linux:6::clientkernel-debug-debuginfobefore 0:2.6.32-642.el60:2.6.32-642.el6
Red Hat:enterprise_linux:6::clientkernel-debug-develbefore 0:2.6.32-642.el60:2.6.32-642.el6
Red Hat:enterprise_linux:6::clientkernel-debuginfobefore 0:2.6.32-642.el60:2.6.32-642.el6
Red Hat:enterprise_linux:6::clientkernel-debuginfo-common-i686before 0:2.6.32-642.el60:2.6.32-642.el6
Red Hat:enterprise_linux:6::clientkernel-debuginfo-common-x86_64before 0:2.6.32-642.el60:2.6.32-642.el6
Red Hat:enterprise_linux:6::clientkernel-develbefore 0:2.6.32-642.el60:2.6.32-642.el6
Red Hat:enterprise_linux:6::clientkernel-docbefore 0:2.6.32-642.el60:2.6.32-642.el6
Red Hat:enterprise_linux:6::clientkernel-firmwarebefore 0:2.6.32-642.el60:2.6.32-642.el6
Red Hat:enterprise_linux:6::clientkernel-headersbefore 0:2.6.32-642.el60:2.6.32-642.el6
Red Hat:enterprise_linux:6::clientperfbefore 0:2.6.32-642.el60:2.6.32-642.el6
Red Hat:enterprise_linux:6::clientperf-debuginfobefore 0:2.6.32-642.el60:2.6.32-642.el6
Red Hat:enterprise_linux:6::clientpython-perfbefore 0:2.6.32-642.el60:2.6.32-642.el6
Red Hat:enterprise_linux:6::clientpython-perf-debuginfobefore 0:2.6.32-642.el60:2.6.32-642.el6
Red Hat:enterprise_linux:6::serverkernel-bootwrapperbefore 0:2.6.32-642.el60:2.6.32-642.el6
Red Hat:enterprise_linux:6::serverkernel-debuginfo-common-ppc64before 0:2.6.32-642.el60:2.6.32-642.el6
Red Hat:enterprise_linux:6::serverkernel-debuginfo-common-s390xbefore 0:2.6.32-642.el60:2.6.32-642.el6
Red Hat:enterprise_linux:6::serverkernel-kdumpbefore 0:2.6.32-642.el60:2.6.32-642.el6
Red Hat:enterprise_linux:6::serverkernel-kdump-debuginfobefore 0:2.6.32-642.el60:2.6.32-642.el6
Red Hat:enterprise_linux:6::serverkernel-kdump-develbefore 0:2.6.32-642.el60:2.6.32-642.el6
SUSE:Linux Enterprise Desktop 11 SP4kernel-defaultbefore 3.0.101-68.13.0.101-68.1

+27

Same product

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Published before and after this one in the same product

  • ← EarlierCVE-2015-8215Nov 16, 2015 · net/ipv6/addrconf.c in the IPv6 stack in the Linux kernel before 4.0 does not validate attempted changes to the MTU value, which allows cont
    21Monitor
  • ← EarlierCVE-2013-7446Dec 28, 2015 · Use-after-free vulnerability in net/unix/af_unix.c in the Linux kernel before 4.3.3 allows local users to bypass intended AF_UNIX socket per
    21Monitor
  • Later →CVE-2015-7884Dec 28, 2015 · The vivid_fb_ioctl function in drivers/media/platform/vivid/vivid-osd.c in the Linux kernel through 4.3.3 does not initialize a certain stru
    9Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:linux3.8-1~experimental.1 · Debian:12Package registry (OSV)
red hat:kernel0:2.6.32-642.el6 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:kernel-abi-whitelists0:2.6.32-642.el6 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:kernel-debug0:2.6.32-642.el6 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:kernel-debug-debuginfo0:2.6.32-642.el6 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:kernel-debug-devel0:2.6.32-642.el6 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:kernel-debuginfo0:2.6.32-642.el6 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:kernel-debuginfo-common-i6860:2.6.32-642.el6 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:kernel-debuginfo-common-x86_640:2.6.32-642.el6 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:kernel-devel0:2.6.32-642.el6 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:perf-debuginfo0:2.6.32-642.el6 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:python-perf0:2.6.32-642.el6 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:python-perf-debuginfo0:2.6.32-642.el6 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
suse:kernel-default3.0.101-68.1 · SUSE:Linux Enterprise Desktop 11 SP4Package registry (OSV)
suse:kernel-docs3.0.101-68.2 · SUSE:Linux Enterprise Software Development Kit 11 SP4Package registry (OSV)
suse:kernel-ec23.0.101-68.1 · SUSE:Linux Enterprise Server 11 SP4Package registry (OSV)
suse:kernel-pae3.0.101-68.1 · SUSE:Linux Enterprise Desktop 11 SP4Package registry (OSV)
suse:kernel-ppc643.0.101-68.1 · SUSE:Linux Enterprise Server 11 SP4Package registry (OSV)
suse:kernel-rt3.0.101.rt130-48.1 · SUSE:Linux Enterprise Real Time 11 SP4Package registry (OSV)
suse:kernel-rt_trace3.0.101.rt130-48.1 · SUSE:Linux Enterprise Real Time 11 SP4Package registry (OSV)
suse:kernel-source3.0.101-68.1 · SUSE:Linux Enterprise Desktop 11 SP4Package registry (OSV)
suse:kernel-source-rt3.0.101.rt130-48.1 · SUSE:Linux Enterprise Real Time 11 SP4Package registry (OSV)
suse:kernel-syms3.0.101-68.1 · SUSE:Linux Enterprise Desktop 11 SP4Package registry (OSV)
suse:kernel-trace3.0.101-68.1 · SUSE:Linux Enterprise Desktop 11 SP4Package registry (OSV)
suse:kernel-xen3.0.101-68.1 · SUSE:Linux Enterprise Desktop 11 SP4Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • Administrator privileges are required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
High
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-20 · Improper Input Validation

CVSS vector

CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (9 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records