5.5

CVE-2020-10768: linux kernel kernel Expected Behavior Violation

Modified
AliasesUBUNTU-CVE-2020-10768DEBIAN-CVE-2020-10768
Published 15-09-2020Last modified 04-08-2024

Vulnerability summary

CVE-2020-10768 is a medium (CVSS 5.5) Expected Behavior Violation vulnerability in linux kernel kernel. EPSS estimates a 0.40% chance of exploitation in the next 30 days, higher than 33.9% 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
0.40%
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 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 prctl() function, where it can be used to enable indirect branch speculation after it has been disabled. This call incorrectly reports it as being 'force disabled' when it is not and opens the system to Spectre v2 attacks. The highest threat from this vulnerability is to confidentiality.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.40%

Chance of exploitation in the next 30 days

Percentile

34%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.40% 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