6.5

CVE-2019-14877: newlib_project newlib NULL Pointer Dereference

CVSS: 6.5v3.0MediumModified
AliasesUBUNTU-CVE-2019-14877DEBIAN-CVE-2019-14877
Published 19-03-2020Last modified 05-08-2024
Open JSON

Vulnerability summary

CVE-2019-14877 is a medium (CVSS 6.5) NULL Pointer Dereference vulnerability in newlib_project newlib. EPSS estimates a 1.29% chance of exploitation in the next 30 days, higher than 69.8% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
36/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.0 (CVE.org)
EPSS score
1.29%
0%100%
Low · -0.04 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Timeline

  1. 19-03-2020
    PublishedVulnerability first disclosed.
  2. 05-08-2024
    Last modifiedVulnerability information updated.

Description

In the __mdiff function of the newlib libc library, all versions prior to 3.3.0 (see newlib/libc/stdlib/mprec.c), Balloc is used to allocate big integers, however no check is performed to verify if the allocation succeeded or not. The access to _wds and _sign will trigger a null pointer dereference bug in case of a memory allocation failure.

CVSS metrics

7 scores · 4 sources · 3 versions

EPSS trend

Probability

1.29%

Chance of exploitation in the next 30 days

Percentile

70%

Versus all other CVEs

30-day change

-0.04 pp

From 1.33% on 18-09-2026

18-09-202618-10-2026
EPSS score
1.29%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (census-labs.com)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Debian2 products
  • newlib< 3.3.0-1
  • picolibc< 1.4.3-1
Newlib_project1 product
Red hat1 product
  • newliball newlib versions prior to 3.3.0
Ubuntu1 product
  • newlibAll versions (No fix recorded)

4 vendors · 5 products

References

4 links