Integer overflow in Linux Kernel
CVE-2019-11477
Jonathan Looney discovered that the TCP_SKB_CB(skb)->tcp_gso_segs value was subject to an integer overflow in the Linux kernel when handling TCP Selective Acknowledgments (SACKs). A remote attacker could use this to cause a denial of servi…
Vulnerability class: Integer Overflow
EPSS: 0.699 (98.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Linux Kernel — versions 4.4, 4.9, 4.14
Weakness classification (CWE)
Public proof-of-concept exploits
References
- VU#905115 (third-party-advisory, x_refsource_CERT-VN)
- [oss-security] 20190620 Re: Linux and FreeBSD Kernel: Multiple TCP-based remote denial of service issues (mailing-list, x_refsource_MLIST)
- 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)
- [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)
- [oss-security] 20191023 Membership application for linux-distros - VMware (mailing-list, x_refsource_MLIST)
- [oss-security] 20191029 Re: Membership application for linux-distros - VMware (mailing-list, x_refsource_MLIST)
Frequently asked questions
- What is CVE-2019-11477?
- CVE-2019-11477 is a high-severity vulnerability in Linux Kernel, classified under Integer Overflow or Wraparound. CVSS score: 7.5/10. Published 2019-06-18.
- How severe is CVE-2019-11477?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2019-11477 known to be exploited?
- 15 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.