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CVE-2010-2521

31
FAUCET Score

CVE-2010-2521 describes multiple buffer overflows in the NFS server's XDR implementation within the Linux kernel, affecting versions prior to 2.6.34-rc6. This critical vulnerability (CVSS 10.0) allows remote, unauthenticated attackers to trigger a denial of service (panic) or potentially execute arbitrary code via a crafted NFSv4 compound WRITE request. Despite its high severity, there is no known active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.6.34CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:rc5:*:*:*:*:*:*
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

10.0HIGH

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

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
8.98%
Probability of exploitation in next 30 days
EPSS Percentile
94.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0898 is in the 91st percentile among its peer group of 51,553 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 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 (5)

redhatpatch availablevia redhat_api
Product: MRG for RHEL-5Fixed in: kernel-rt-0:2.6.24.7-161.el5rt
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: kernel-0:2.6.9-89.0.28.EL
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: kernel-0:2.6.18-194.11.1.el5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5.3.Z - Server OnlyFixed in: kernel-0:2.6.18-128.26.1.el5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5.4.Z - Server OnlyFixed in: kernel-0:2.6.18-164.30.1.el5
View patch

Vendor Advisories (1)

redhatCVE-2010-2521Important

kernel: nfsd4: bug in read_buf

Apr 20, 2010

References

git.kernel.org
lists.opensuse.org / opensuse-security-announce/2010-09/msg00004.html
bugzilla.redhat.com / show_bug.cgi
secunia.com / advisories/43315
securitytracker.com / id
rhn.redhat.com / errata/RHSA-2010-0606.html
debian.org / security/2010/dsa-2094
kernel.org / pub/linux/kernel/v2.6/testing/v2.6.34/ChangeLog-2.6.34-rc6
mandriva.com / security/advisories
mandriva.com / security/advisories
openwall.com / lists/oss-security/2010/07/07/1
openwall.com / lists/oss-security/2010/07/09/2
redhat.com / support/errata/RHSA-2010-0610.html
redhat.com / support/errata/RHSA-2010-0893.html
redhat.com / support/errata/RHSA-2010-0907.html
securityfocus.com / archive/1/516397/100/0/threaded
securityfocus.com / bid/42249
ubuntu.com / usn/USN-1000-1
vmware.com / security/advisories/VMSA-2011-0003.html
vupen.com / english/advisories/2010/3050