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CVE-2011-1593

18
FAUCET Score

CVE-2011-1593 describes multiple integer overflows in the Linux kernel's next_pidmap function (kernel/pid.c) affecting versions prior to 2.6.38.4, including canonical, linux, and redhat distributions. This vulnerability, with a CVSS score of 4.9 (AV:L/AC:L/Au:N/C:N/I:N/A:C), allows a local attacker to trigger a denial of service (system crash) through crafted getdents or readdir system calls. There is no evidence of active exploitation, no known exploit code in Metasploit, Nuclei, or ExploitDB, and it has received no community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.6.38.4CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
5.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux:5.0:*:*:*:*:*:*:*
5.6CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_aus:5.6:*:*:*:*:*:*:*
5.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_desktop:5.0:*:*:*:*:*:*:*
5.6CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_eus:5.6:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.9MEDIUM

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Exploitability Score
3.9
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.57%
Probability of exploitation in next 30 days
EPSS Percentile
43.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0057 is in the 80th percentile among its peer group of 3,049 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 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 (6)

redhatpatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: kernel-0:2.6.18-238.19.1.el5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: kernel-0:2.6.32-131.12.1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise MRG 2Fixed in: kernel-rt-0:2.6.33.9-rt31.75.el6rt
View patch
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: kernel
redhatno patchvia redhat_api
Product: Red Hat Enterprise MRG 1Fixed in: kernel-rt

Vendor Advisories (1)

redhatCVE-2011-1593Moderate

kernel: proc: signedness issue in next_pidmap()

Apr 13, 2011

References

git.kernel.org
git.kernel.org
groups.google.com / group/fa.linux.kernel/msg/4a28ecb7f755a88d
ExploitThird Party Advisory
openwall.com / lists/oss-security/2011/04/19/1
Mailing ListPatchThird Party Advisory
openwall.com / lists/oss-security/2011/04/20/1
Mailing ListPatchThird Party Advisory
rhn.redhat.com / errata/RHSA-2011-0927.html
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingPatchThird Party Advisory
secunia.com / advisories/44164
Third Party AdvisoryVendor Advisory
securitytracker.com / id
Third Party AdvisoryVDB Entry
exchange.xforce.ibmcloud.com / vulnerabilities/66876
Third Party AdvisoryVDB Entry
kernel.org / pub/linux/kernel/v2.6/ChangeLog-2.6.38.4
Release NotesVendor Advisory
securityfocus.com / bid/47497
Third Party AdvisoryVDB Entry
ubuntu.com / usn/USN-1146-1
Third Party Advisory