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CVE-2011-2203

13
FAUCET Score

CVE-2011-2203 describes a denial-of-service vulnerability in the Linux kernel (versions 2.6) where a local user can trigger a NULL pointer dereference and system crash (Oops). This occurs by mounting an HFS file system containing a malformed MDB extent record, specifically within the hfs_find_init function. The vulnerability has a low severity CVSS score of 2.1 (AV:L/AC:L/Au:N/C:N/I:N/A:P), indicating it requires local access and has a low attack complexity, leading only to a partial availability impact. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this decade-old flaw.

Impacted Technologies

VendorProductVersion(s)CPE
2.6CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:2.6:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

2.1LOW

AV:L/AC:L/Au:N/C:N/I:N/A:P

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Exploitability Score
3.9
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.45%
Probability of exploitation in next 30 days
EPSS Percentile
36.6%
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 68th percentile among its peer group of 2,096 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.6 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (2)

redhatpatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: kernel-0:2.6.18-274.12.1.el5
View patch

Vendor Advisories (1)

redhatCVE-2011-2203Low

kernel: hfs_find_init() sb->ext_tree NULL pointer dereference

Jun 8, 2011

References

bugzilla.redhat.com / show_bug.cgi
ExploitPatch
secunia.com / advisories/47754
lkml.org / lkml/2011/6/8/154
Exploit
openwall.com / lists/oss-security/2011/06/13/16
securityfocus.com / bid/48236
ubuntu.com / usn/USN-1324-1
ubuntu.com / usn/USN-1328-1
ubuntu.com / usn/USN-1344-1