Integer overflow in Newlib Project
CVE-2021-3420
A flaw was found in newlib in versions prior to 4.0.0. Improper overflow validation in the memory allocation functions mEMALIGn, pvALLOc, nano_memalign, nano_valloc, nano_pvalloc could case an integer overflow, leading to an allocation of a small buffer and then to a heap-based buffer overflow.
Vulnerability class: Integer Overflow
EPSS: 0.021 (79.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Newlib_project Newlib
- Fedoraproject Fedora — versions 32, 33, 34
- N/a Newlib — versions newlib versions prior to 4.0.0
Weakness classification (CWE)
References
- secalert@redhat.com (Patch, Third Party Advisory, x_refsource_MISC, Issue Tracking, Broken Link)
- secalert@redhat.com (x_refsource_FEDORA, vendor-advisory)
- secalert@redhat.com (x_refsource_FEDORA, vendor-advisory)
- secalert@redhat.com (x_refsource_FEDORA, vendor-advisory)
Frequently asked questions
- What is CVE-2021-3420?
- CVE-2021-3420 is a critical-severity vulnerability in Newlib Project, classified under Integer Overflow or Wraparound. CVSS score: 9.8/10. Published 2021-03-05.
- How severe is CVE-2021-3420?
- Critical severity. CVSS v3 base score is 9.8 out of 10.