CVE-2021-45931: fedoraproject fedora Out-of-bounds Write
CVSS: 6.5v3.1MediumModified
Published 31-12-2021Last modified 04-08-2024
Vulnerability summary
CVE-2021-45931 is a medium (CVSS 6.5) Out-of-bounds Write vulnerability in fedoraproject fedora. EPSS estimates a 1.78% chance of exploitation in the next 30 days, higher than 77.9% of scored vulnerabilities. 2 public exploits are recorded.
CVSS score
6.5/10
010
Medium · v3.1 (NVD)EPSS score
1.78%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits2github, reference
Timeline
- 31-12-2021PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
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).
CVSS metrics
2 scores · 1 source · 2 versionsMedium 6.5Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HSourcesSingle source
Medium 4.3Preferred score · NVD (NIST)
AV:N/AC:M/Au:N/C:N/I:N/A:PSourcesSingle source
EPSS trend
Probability
1.78%
Chance of exploitation in the next 30 days
Percentile
78%
Versus all other CVEs
30-day change
0.00 pp
From 1.78% on 19-09-2026
19-09-202619-10-2026
EPSS score1.78%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
2 foundOss Fuzz Vulns
Maturity: poc
Exploit Reference (bugs.chromium.org)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
2 vendors · 2 products
References
7 links- github.com/google/oss-fuzz-vulns/blob/main/vulns/harfbuzz/OSV-2021-1159.yamlX Refsource MISCExploitThird Party Advisory
- bugs.chromium.org/p/oss-fuzz/issues/detail?id=37425X Refsource MISCExploitIssue TrackingThird Party Advisory
- github.com/harfbuzz/harfbuzz/commit/d3e09bf4654fe5478b6dbf2b26ebab6271317d81X Refsource MISCPatchThird Party Advisory