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CVE-2010-1643

22
FAUCET Score

CVE-2010-1643 describes a denial-of-service vulnerability in the Linux kernel (before 2.6.28-rc3), specifically within the mm/shmem.c component when strict overcommit is enabled. This flaw allows attackers to trigger a NULL pointer dereference and crash the knfsd service by exploiting improper handling of shmemfs object exports. With a CVSS score of 6.9, it carries high severity due to local access, medium attack complexity, and potential for complete confidentiality, integrity, and availability impact. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.6.28CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:rc2:*:*:*:*:*:*
2.6.0CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:2.6.0:*:*:*:*:*:*:*
2.6.1CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:2.6.1:*:*:*:*:*:*:*
2.6.2CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:2.6.2:*:*:*:*:*:*:*
2.6.3CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:2.6.3:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

6.9MEDIUM

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

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
LOCAL
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
3.4
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.37%
Probability of exploitation in next 30 days
EPSS Percentile
29.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0037 is in the 45th percentile among its peer group of 1,595 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 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

redhatpatch availablevia redhat_api
Product: MRG for RHEL-5Fixed in: kernel-rt-0:2.6.24.7-161.el5rt
View patch

Vendor Advisories (1)

redhatCVE-2010-1643Important

kernel: nfsd: fix vm overcommit crash

Oct 30, 2008

References

git.kernel.org
lists.opensuse.org / opensuse-security-announce/2010-07/msg00006.html
bugzilla.redhat.com / show_bug.cgi
secunia.com / advisories/40645
Vendor Advisory
exchange.xforce.ibmcloud.com / vulnerabilities/58957
vigilance.fr / vulnerability/Linux-kernel-denial-of-service-via-knfsd-9666
kernel.org / pub/linux/kernel/v2.6/testing/v2.6.28/ChangeLog-2.6.28-rc3
mandriva.com / security/advisories
openwall.com / lists/oss-security/2010/05/26/2
openwall.com / lists/oss-security/2010/05/26/6
securityfocus.com / bid/40377
vupen.com / english/advisories/2010/1857
Vendor Advisory