Buffer overflow in Gnu Grub2
CVE-2021-3696
A heap out-of-bounds write may heppen during the handling of Huffman tables in the PNG reader. This may lead to data corruption in the heap space. Confidentiality, Integrity and Availablity impact may be considered Low as it's very complex…
Vulnerability class: Buffer Overflow
EPSS: 0.005 (37.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.5 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L.
Affected products
- Gnu Grub2
- Netapp Ontap_select_deploy_administration_utility
- Redhat Codeready_linux_builder
- Redhat Developer_tools — versions 1.0
- Redhat Enterprise_linux — versions 8.0, 8.1, 8.4
- Redhat Enterprise_linux_eus — versions 8.2, 8.4, 8.6
- Redhat Enterprise_linux_for_power_little_endian — versions 8.0, 9.0
- Redhat Enterprise_linux_for_power_little_endian_eus — versions 8.2, 8.4, 8.6
- Redhat Enterprise_linux_server_aus — versions 8.2, 8.4, 8.6
- Redhat Enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions — versions 8.1, 8.2, 8.4
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secalert@redhat.com (Third Party Advisory, x_refsource_MISC, Issue Tracking)
- secalert@redhat.com (vendor-advisory, Third Party Advisory, x_refsource_GENTOO)
- secalert@redhat.com (x_refsource_CONFIRM, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-3696?
- CVE-2021-3696 is a medium-severity vulnerability in Gnu Grub2, classified under Out-of-bounds Write. CVSS score: 4.5/10. Published 2022-07-06.
- How severe is CVE-2021-3696?
- Medium severity. CVSS v3 base score is 4.5 out of 10.
- Is CVE-2021-3696 known to be exploited?
- 18 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.