CVE-2021-45931

Public Exploit

Description

HarfBuzz 2.9.0 has an out-of-bounds write in hb_bit_set_invertible_t::set (called from hb_sparseset_t<hb_bit_set_invertible_t>::set and hb_set_copy).

Category

6.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.13%
Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory gentoo.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/google/oss-fuzz-vulns/blob/main/vulns/harfbuzz/OSV-2021-1159.yaml third party advisory exploit
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=37425 issue tracking exploit third party advisory
https://github.com/harfbuzz/harfbuzz/commit/d3e09bf4654fe5478b6dbf2b26ebab6271317d81 third party advisory patch
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5A7TCR2MY46YK3NHQZB3SLESUH354IEA/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DI6247WOAKB46CZZ6SCDSJVWWCW3GMZH/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4EAIZKL4O67FN2CWJYHYKZEMNYWNWO3D/ vendor advisory
https://security.gentoo.org/glsa/202209-11 third party advisory vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-45931?
CVE-2021-45931 has been scored as a medium severity vulnerability.
How to fix CVE-2021-45931?
To fix CVE-2021-45931, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-45931 being actively exploited in the wild?
It is possible that CVE-2021-45931 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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