Integer overflow in Broadcom Fabric Operating System
CVE-2019-18805
An issue was discovered in net/ipv4/sysctl_net_ipv4.c in the Linux kernel before 5.0.11. There is a net/ipv4/tcp_input.c signed integer overflow in tcp_ack_update_rtt() when userspace writes a very large integer to /proc/sys/net/ipv4/tcp_min_rtt_wlen, leading to a denial of service or possibly unspecified other impact, aka CID-19fad20d15a6.
Vulnerability class: Integer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.035 (89.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 89.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.034 · newest: 0.035 · change: +0.000
Affected products
Weakness classification (CWE)
References
- cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.11 (Patch, Mailing List, Vendor Advisory)
- git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/ (Patch, Mailing List, Vendor Advisory)
- lists.opensuse.org/opensuse-security-announce/2019-11/msg00035.html (vendor-advisory, Mailing List, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2019-11/msg00039.html (vendor-advisory, Mailing List, Third Party Advisory)
- security.netapp.com/advisory/ntap-20191205-0001/ (Third Party Advisory)
- access.redhat.com/errata/RHSA-2020:0740 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-18805?
- CVE-2019-18805 is a critical-severity vulnerability in Broadcom Fabric Operating System, classified under Integer Overflow or Wraparound. CVSS score: 9.8/10. Published 2019-11-07.
- How severe is CVE-2019-18805?
- Critical severity. CVSS v3 base score is 9.8 out of 10.