Vulnerability in Linux Kernel
CVE-2019-11479
Jonathan Looney discovered that the Linux kernel default MSS is hard-coded to 48 bytes. This allows a remote peer to fragment TCP resend queues significantly more than if a larger MSS were enforced. A remote attacker could use this to caus…
EPSS: 0.917 (99.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
Affected products
- Linux Kernel — versions 4.4, 4.9, 4.14
Weakness classification (CWE)
Public proof-of-concept exploits
References
- 108818 (vdb-entry, x_refsource_BID)
- VU#905115 (third-party-advisory, x_refsource_CERT-VN)
- RHSA-2019:1594 (vendor-advisory, x_refsource_REDHAT)
- RHSA-2019:1602 (vendor-advisory, x_refsource_REDHAT)
- [oss-security] 20190628 Re: linux-distros membership application - Microsoft (mailing-list, x_refsource_MLIST)
- USN-4041-2 (vendor-advisory, x_refsource_UBUNTU)
- [oss-security] 20190706 Re: linux-distros membership application - Microsoft (mailing-list, x_refsource_MLIST)
- [oss-security] 20190706 Re: linux-distros membership application - Microsoft (mailing-list, x_refsource_MLIST)
- RHSA-2019:1699 (vendor-advisory, x_refsource_REDHAT)
- USN-4041-1 (vendor-advisory, x_refsource_UBUNTU)
Frequently asked questions
- What is CVE-2019-11479?
- CVE-2019-11479 is a medium-severity vulnerability in Linux Kernel, classified under Asymmetric Resource Consumption (Amplification). CVSS score: 5.3/10. Published 2019-06-18.
- How severe is CVE-2019-11479?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2019-11479 known to be exploited?
- 7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.