CVE-2011-2699
CVE-2011-2699 is a high-severity vulnerability in Redhat Enterprise Linux with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.
Key facts
- Severity: High (CVSS 3.x base score 7.5)
- CVSS v2: 7.8
- EPSS exploit prediction: 6% (92nd percentile)
- Actively exploited: Not listed in CISA KEV
- Affected product: Redhat Enterprise Linux
- Published:
- Last modified:
Description
The IPv6 implementation in the Linux kernel before 3.1 does not generate Fragment Identification values separately for each destination, which makes it easier for remote attackers to cause a denial of service (disrupted networking) by predicting these values and sending crafted packets.
Frequently asked questions
- What is CVE-2011-2699?
- The IPv6 implementation in the Linux kernel before 3.1 does not generate Fragment Identification values separately for each destination, which makes it easier for remote attackers to cause a denial of service (disrupted networking) by predicting these values and sending crafted packets.
- How severe is CVE-2011-2699?
- CVE-2011-2699 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
- Is CVE-2011-2699 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2011-2699?
- CVE-2011-2699 primarily affects Redhat Enterprise Linux. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2011-2699?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2011-2699 published?
- CVE-2011-2699 was published on 2012-05-24 and last updated on 2026-06-16.
References
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=87c48fa3b4630905f98268dde838ee43626a060c
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.1
- http://www.mandriva.com/security/advisories?name=MDVSA-2013:150
- http://www.openwall.com/lists/oss-security/2011/07/20/5
- http://www.securitytracker.com/id?1027274
- https://bugzilla.redhat.com/show_bug.cgi?id=723429
- https://github.com/torvalds/linux/commit/87c48fa3b4630905f98268dde838ee43626a060c
Affected products (3)
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:4.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_mrg:2.0:*:*:*:*:*:*:*
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