How severe is CVE-2011-1927?

CVE-2011-1927 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2011-1927 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-1927?

CVE-2011-1927 primarily affects Linux Linux Kernel. In total, 17 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-1927?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2011-1927 published?

CVE-2011-1927 was published on 2012-06-13 and last updated on 2026-06-16.

CVE-2011-1927

CVE-2011-1927 is a medium-severity vulnerability in Linux Linux Kernel with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 3% (83rd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Linux Linux Kernel
Published: 2012-06-13
Last modified: 2026-06-16

Description

The ip_expire function in net/ipv4/ip_fragment.c in the Linux kernel before 2.6.39 does not properly construct ICMP_TIME_EXCEEDED packets after a timeout, which allows remote attackers to cause a denial of service (invalid pointer dereference) via crafted fragmented packets.

Frequently asked questions

What is CVE-2011-1927?: The ip_expire function in net/ipv4/ip_fragment.c in the Linux kernel before 2.6.39 does not properly construct ICMP_TIME_EXCEEDED packets after a timeout, which allows remote attackers to cause a denial of service (invalid pointer dereference) via crafted fragmented packets.
How severe is CVE-2011-1927?: CVE-2011-1927 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2011-1927 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-1927?: CVE-2011-1927 primarily affects Linux Linux Kernel. In total, 17 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-1927?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-1927 published?: CVE-2011-1927 was published on 2012-06-13 and last updated on 2026-06-16.

References

Affected products (17)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.38:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.38:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.38:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.38:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.38:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.38:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.38:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.38:rc7:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.38:rc8:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.38.1:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.38.2:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.38.3:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.38.4:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.38.5:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.38.6:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.38.7:*:*:*:*:*:*:*

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