CVE-2019-18805: broadcom fabric_operating_system Integer Overflow or Wraparound
Vulnerability summary
CVE-2019-18805 is a critical (CVSS 9.8) Integer Overflow or Wraparound vulnerability in broadcom fabric_operating_system. EPSS estimates a 3.47% chance of exploitation in the next 30 days, higher than 89.1% of scored vulnerabilities.
Severe, CVSS 9.8 (NVD); no exploitation reported by the 5 checked sources; EPSS 3% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 17 · Related 14Timeline
- 07-11-2019PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
3.47%
Chance of exploitation in the next 30 days
Percentile
89%
Versus all other CVEs
30-day change
Increase +0.04 pp
From 3.43% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu27 products
- linux< 4.4.0-157.185 | < 4.15.0-60.67
- linux-aws< 4.4.0-1054.58 | < 4.4.0-1090.101 | < 4.15.0-1047.49
- linux-aws-fips< 4.15.0-2018.18 | All versions (No fix recorded)
- linux-aws-hwe< 4.15.0-1047.49~16.04.1
- linux-azure< 4.15.0-1059.64~14.04.1 | < 4.15.0-1056.61 | < 5.0.0-1014.14~18.04.1
Netapp13 products
- active_iq_unified_managerna
- aff_a400_firmwarena
- aff_a700s_firmwarena
- data_availability_servicesna
- e-series_santricity_os_controller≥ 11.0.0, ≤ 11.60.3
Broadcom1 product
Debian1 product
- linux< 5.2.6-1
Linux1 product
- linux_kernel≥ 4.4, < 4.4.180 | ≥ 4.9, < 4.9.172 | ≥ 4.14, < 4.14.115 | ≥ 4.19, < 4.19.38 | ≥ 5.0, < 5.0.11 | 5.1:rc1 | 5.1:rc2 | 5.1:rc3 | 5.1:rc4 | 5.1:rc5 | 5.1:rc6 | 5.1:rc7
Opensuse1 product
- leapEOL15.0 | 15.1
Redhat1 product
- enterprise_linuxEOL7.0
7 vendors · 45 products
References
9 links- cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.11X Refsource MISCREPORTMailing ListPatchVendor Advisory
- lists.opensuse.org/opensuse-security-announce/2019-11/msg00035.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2019-11/msg00039.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
