CVE-2010-2521

CVE-2010-2521 is a critical-severity vulnerability in Linux Linux Kernel with a CVSS 2.0 base score of 10.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.

Key facts

• Severity: Critical (CVSS 2.0 base score 10.0)
• EPSS exploit prediction: 9% (95th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-119
• Affected product: Linux Linux Kernel
• Published: 2010-09-07
• Last modified: 2026-06-16

Description

Multiple buffer overflows in fs/nfsd/nfs4xdr.c in the XDR implementation in the NFS server in the Linux kernel before 2.6.34-rc6 allow remote attackers to cause a denial of service (panic) or possibly execute arbitrary code via a crafted NFSv4 compound WRITE request, related to the read_buf and nfsd4_decode_compound functions.

Frequently asked questions

What is CVE-2010-2521?

Multiple buffer overflows in fs/nfsd/nfs4xdr.c in the XDR implementation in the NFS server in the Linux kernel before 2.6.34-rc6 allow remote attackers to cause a denial of service (panic) or possibly execute arbitrary code via a crafted NFSv4 compound WRITE request, related to the read_buf and nfsd4_decode_compound functions.

How severe is CVE-2010-2521?

CVE-2010-2521 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-2010-2521 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (95th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2010-2521?

CVE-2010-2521 primarily affects Linux Linux Kernel. In total, 149 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2010-2521?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2010-2521 published?

CVE-2010-2521 was published on 2010-09-07 and last updated on 2026-06-16.

References

• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=2bc3c1179c781b359d4f2f3439cb3df72afc17fc
• http://lists.opensuse.org/opensuse-security-announce/2010-09/msg00004.html
• http://secunia.com/advisories/43315
• http://securitytracker.com/id?1024286
• http://www.debian.org/security/2010/dsa-2094
• http://www.kernel.org/pub/linux/kernel/v2.6/testing/v2.6.34/ChangeLog-2.6.34-rc6
• http://www.mandriva.com/security/advisories?name=MDVSA-2010:198
• http://www.mandriva.com/security/advisories?name=MDVSA-2011:051
• http://www.openwall.com/lists/oss-security/2010/07/07/1
• http://www.openwall.com/lists/oss-security/2010/07/09/2
• http://www.redhat.com/support/errata/RHSA-2010-0610.html
• http://www.redhat.com/support/errata/RHSA-2010-0893.html
• http://www.redhat.com/support/errata/RHSA-2010-0907.html
• http://www.securityfocus.com/archive/1/516397/100/0/threaded
• http://www.securityfocus.com/bid/42249
• http://www.ubuntu.com/usn/USN-1000-1
• http://www.vmware.com/security/advisories/VMSA-2011-0003.html
• http://www.vupen.com/english/advisories/2010/3050
• https://bugzilla.redhat.com/show_bug.cgi?id=612028
• https://rhn.redhat.com/errata/RHSA-2010-0606.html

Affected products (149)

• cpe:2.3:o:linux:linux_kernel:*:rc5:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:2.6.0:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:2.6.1:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:2.6.2:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:2.6.3:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:2.6.4:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:2.6.5:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:2.6.6:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:2.6.7:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:2.6.8:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:2.6.8.1:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:2.6.9:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:2.6.10:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:2.6.11:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:2.6.11.1:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:2.6.11.2:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:2.6.11.3:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:2.6.11.4:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:2.6.11.5:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:2.6.11.6:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:2.6.11.7:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:2.6.11.8:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:2.6.11.9:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:2.6.11.10:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:2.6.11.11:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:2.6.11.12:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:2.6.12:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:2.6.12.1:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:2.6.12.2:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:2.6.12.3:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:2.6.12.4:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:2.6.12.5:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:2.6.12.6:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:2.6.13:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:2.6.13.1:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:2.6.13.2:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:2.6.13.3:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:2.6.13.4:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:2.6.13.5:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:2.6.14:*:*:*:*:*:*:*

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