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CVE-2015-8952

20
FAUCET Score

CVE-2015-8952 describes a denial-of-service vulnerability in the Linux kernel's ext2 and ext4 filesystem implementations, specifically affecting the mbcache feature before version 4.6. Local users can trigger a soft lockup by performing filesystem operations involving numerous extended attributes, as seen in environments utilizing Ceph or Samba. Rated Medium (CVSS 5.5), this vulnerability requires local access and low privileges, leading to high availability impact without affecting confidentiality or integrity. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.5.7CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.5MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.45%
Probability of exploitation in next 30 days
EPSS Percentile
37.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0045 is in the 91st percentile among its peer group of 15,940 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: kernel

Vendor Advisories (1)

redhatCVE-2015-8952Low

kernel: mbcache code subject to softlockup DOS in cache management

Aug 22, 2016

References

git.kernel.org / cgit/linux/kernel/git/torvalds/linux.git/commit
Patch
git.kernel.org / cgit/linux/kernel/git/torvalds/linux.git/commit
Patch
git.kernel.org / cgit/linux/kernel/git/torvalds/linux.git/commit
Patch
bugzilla.kernel.org / show_bug.cgi
Issue TrackingThird Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party AdvisoryVDB Entry
github.com / torvalds/linux/commit/82939d7999dfc1f1998c4b1c12e2f19edbdff272
Vendor Advisory
github.com / torvalds/linux/commit/be0726d33cb8f411945884664924bed3cb8c70ee
Issue TrackingPatch
github.com / torvalds/linux/commit/f9a61eb4e2471c56a63cd804c7474128138c38ac
Issue Tracking
lwn.net / Articles/668718
Third Party Advisory
usn.ubuntu.com / 3582-1
usn.ubuntu.com / 3582-2
openwall.com / lists/oss-security/2016/08/22/2
Third Party Advisory
openwall.com / lists/oss-security/2016/08/25/4
PatchThird Party Advisory