CVE-2011-1576

The Generic Receive Offload (GRO) implementation in the Linux kernel 2.6.18 on Red Hat Enterprise Linux 5 and 2.6.32 on Red Hat Enterprise Linux 6, as used in Red Hat Enterprise Virtualization (RHEV) Hypervisor and other products, allows remote attackers to cause a denial of service via crafted VLAN packets that are processed by the napi_reuse_skb function, leading to (1) a memory leak or (2) memory corruption, a different vulnerability than CVE-2011-1478.

Published: 2011-08-31 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-1576 is rated Moderate Risk (43.4/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.00%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2011-1576

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.78% 1.00% +0.23%
2 2025-03-30 0.41% 0.78% +0.37%
3 2025-03-29 — 0.41% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-1576

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.7 2.0 MEDIUM
AV:A/AC:M/Au:N/C:N/I:N/A:C Click to expand
Access vector (AV:A)
Requires access to an adjacent network segment.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:C)
Complete availability impact.
 5.5 6.9 [email protected]

Weakness enumeration for CVE-2011-1576

OS Trackers for CVE-2011-1576

vendor priority summary link
redhat medium — https://access.redhat.com/security/cve/CVE-2011-1576
ubuntu low CVE-2011-1576 low priority: Ubuntu including 8 source packages (linux, linux-ec2, …), 48 status rows across 6 suites (hardy, lucid, maverick, natty, oneiric, upstream): DNE 24, released 19, not-affected 4, ignored 1. https://ubuntu.com/security/CVE-2011-1576

Affected software / configurations for CVE-2011-1576

Vendor Product Version Raw CPE
linux linux_kernel 2.6.18 cpe:2.3:o:linux:linux_kernel:2.6.18:*:*:*:*:*:*:*
redhat enterprise_linux 5 cpe:2.3:o:redhat:enterprise_linux:5:*:*:*:*:*:*:*
redhat enterprise_virtualization_hypervisor — cpe:2.3:a:redhat:enterprise_virtualization_hypervisor:*:*:*:*:*:*:*:*
redhat enterprise_linux 6.0 cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*

References for CVE-2011-1576

cvelogic Threat Intelligence