4.9

CVE-2020-15437: linux linux_kernel NULL Pointer Dereference

Modified
AliasesUBUNTU-CVE-2020-15437DEBIAN-CVE-2020-15437
Published 23-11-2020Last modified 04-08-2024

Vulnerability summary

CVE-2020-15437 is a medium (CVSS 4.9) NULL Pointer Dereference vulnerability in linux linux_kernel. EPSS estimates a 0.43% chance of exploitation in the next 30 days, higher than 37.4% of scored vulnerabilities. 1 public exploit is recorded.

Priority
Routine

Not severe (CVSS 4.4, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
4.9/10
010
Medium · v2.0 (NVD)
EPSS score
0.43%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits1reference

Advisory lineage

Upstream 0 · Downstream 21 · Related 19
OPENSUSE-SU-2020:2161-1OPENSUSE-SU-2020:2193-1OPENSUSE-SU-2020:2260-1OPENSUSE-SU-2021:0242-1RHSA-2021:1578RHSA-2021:1739

Timeline

  1. 23-11-2020
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

The Linux kernel before version 5.8 is vulnerable to a NULL pointer dereference in drivers/tty/serial/8250/8250_core.c:serial8250_isa_init_ports() that allows local users to cause a denial of service by using the p->serial_in pointer which uninitialized.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.43%

Chance of exploitation in the next 30 days

Percentile

37%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.43% 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

1 found
  • referenceUnverified

    Exploit Reference (lkml.org)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Version check

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

Ubuntu41 products
  • linuxAll versions (No fix recorded) | < 4.4.0-189.219 | < 4.15.0-115.116 | < 5.4.0-45.49
  • linux-aws< 4.4.0-1077.81 | < 4.4.0-1113.126 | < 4.15.0-1080.84 | < 5.4.0-1022.22
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.3All versions (No fix recorded)
  • linux-aws-5.4< 5.4.0-1022.22~18.04.1
Debian1 product
  • linux< 5.7.17-1
Linux1 product

3 vendors · 43 products

References

7 links