CVE-2019-18282: debian debian_linux Use of Insufficiently Random Values
Vulnerability summary
CVE-2019-18282 is a medium (CVSS 5.3) Use of Insufficiently Random Values vulnerability in debian debian_linux. EPSS estimates a 2.92% chance of exploitation in the next 30 days, higher than 87% of scored vulnerabilities.
Not severe (CVSS 5.3, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 5Timeline
- 16-01-2020PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
The flow_dissector feature in the Linux kernel 4.3 through 5.x before 5.3.10 has a device tracking vulnerability, aka CID-55667441c84f. This occurs because the auto flowlabel of a UDP IPv6 packet relies on a 32-bit hashrnd value as a secret, and because jhash (instead of siphash) is used. The hashrnd value remains the same starting from boot time, and can be inferred by an attacker. This affects net/core/flow_dissector.c and related code.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated5.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- OSV · DebianEcosystem advisory · calculated5.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
EPSS trend
Probability
2.92%
Chance of exploitation in the next 30 days
Percentile
87%
Versus all other CVEs
30-day change
Increase +0.31 pp
From 2.60% 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.
Ubuntu32 products
- linux< 4.4.0-170.199 | < 4.15.0-74.84
- linux-aws< 4.4.0-1059.63 | < 4.4.0-1099.110 | < 4.15.0-1057.59
- linux-aws-5.0< 5.0.0-1023.26~18.04.1
- linux-aws-fips< 4.15.0-2018.18 | All versions (No fix recorded)
- linux-aws-hwe< 4.15.0-1057.59~16.04.1
Netapp12 products
Debian2 products
- linux< 5.3.15-1
- debian_linuxEOL8.0
Linux1 product
- linux_kernel≥ 4.3, ≤ 5.3.10
4 vendors · 47 products
References
8 links- cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.10X Refsource MISCREPORTMailing ListVendor Advisory
lists.debian.org/debian-lts-announce/2020/03/msg00001.htmlMailing ListX Refsource MLISTThird Party Advisory- www.computer.org/csdl/proceedings-article/sp/2020/349700b594/1j2LgrHDR2oX Refsource MISCThird Party Advisory