5.5

CVE-2020-10767: linux kernel kernel Expected Behavior Violation

Modified
AliasesUBUNTU-CVE-2020-10767DEBIAN-CVE-2020-10767
Published 15-09-2020Last modified 04-08-2024

Vulnerability summary

CVE-2020-10767 is a medium (CVSS 5.5) Expected Behavior Violation vulnerability in linux kernel kernel. EPSS estimates a 0.38% chance of exploitation in the next 30 days, higher than 32.2% 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 (CVE.org)
EPSS score
0.38%
0%100%
Low · +0.01 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 31 · Related 23
DLA-2323-1MGASA-2020-0333OPENSUSE-SU-2020:0935-1OPENSUSE-SU-2020:1153-1OPENSUSE-SU-2021:0242-1OPENSUSE-SU-2024:10728-1

Timeline

  1. 15-09-2020
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

A flaw was found in the Linux kernel before 5.8-rc1 in the implementation of the Enhanced IBPB (Indirect Branch Prediction Barrier). The IBPB mitigation will be disabled when STIBP is not available or when the Enhanced Indirect Branch Restricted Speculation (IBRS) is available. This flaw allows a local attacker to perform a Spectre V2 style attack when this configuration is active. The highest threat from this vulnerability is to confidentiality.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.38%

Chance of exploitation in the next 30 days

Percentile

32%

Versus all other CVEs

30-day change

Increase +0.01 pp

From 0.37% 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.

Ubuntu46 products
  • linux< 4.4.0-186.216 | < 4.15.0-115.116 | < 5.4.0-45.49
  • linux-aws< 4.4.0-1075.79 | < 4.4.0-1111.123 | < 4.15.0-1080.84 | < 5.4.0-1022.22
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.3< 5.3.0-1032.34~18.04.2
  • linux-aws-5.4< 5.4.0-1022.22~18.04.1
Debian1 product
  • linux< 5.7.6-1
Linux1 product
Linux kernel1 product

4 vendors · 49 products

References

12 links
Show all 12 references