5.5

CVE-2019-20812: linux linux_kernel Uncontrolled Resource Consumption

Modified
AliasesUBUNTU-CVE-2019-20812DEBIAN-CVE-2019-20812
Published 03-06-2020Last modified 05-08-2024

Vulnerability summary

CVE-2019-20812 is a medium (CVSS 5.5) Uncontrolled Resource Consumption vulnerability in linux linux_kernel. EPSS estimates a 0.44% chance of exploitation in the next 30 days, higher than 38.3% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.44%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 18 · Related 17
OPENSUSE-SU-2020:0801-1OPENSUSE-SU-2020:0935-1OPENSUSE-SU-2021:0242-1RHSA-2020:4431SUSE-SU-2020:1587-1SUSE-SU-2020:1599-1

Timeline

  1. 03-06-2020
    PublishedVulnerability first disclosed.
  2. 05-08-2024
    Last modifiedVulnerability information updated.

Description

An issue was discovered in the Linux kernel before 5.4.7. The prb_calc_retire_blk_tmo() function in net/packet/af_packet.c can result in a denial of service (CPU consumption and soft lockup) in a certain failure case involving TPACKET_V3, aka CID-b43d1f9f7067.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.44%

Chance of exploitation in the next 30 days

Percentile

38%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.44% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu34 products
  • linuxAll versions (No fix recorded) | < 4.4.0-173.203 | < 4.15.0-88.88
  • linux-aws< 4.4.0-1061.65 | < 4.4.0-1101.112 | < 4.15.0-1060.62
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-fips< 4.15.0-2018.18 | All versions (No fix recorded)
  • linux-aws-hwe< 4.15.0-1060.62~16.04.1
Debian1 product
  • linux< 5.4.8-1
Linux1 product

3 vendors · 36 products

References

9 links