OSV-2026-962

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Import Source
https://github.com/google/oss-fuzz-vulns/blob/main/vulns/harfbuzz/OSV-2026-962.yaml
JSON Data
https://api.osv.dev/v1/vulns/OSV-2026-962
Published
2026-06-24T00:03:23Z
Modified
2026-06-24T00:03:23Z
Summary
Use-of-uninitialized-value in iup_delta_optimize
Details

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=526770452

Crash type: Use-of-uninitialized-value
Crash state:
iup_delta_optimize
OT::tuple_delta_t::optimize
OT::TupleVariationData<OT::NumType<true, unsigned short, 2u>>::tuple_variations_
References

Affected packages

OSS-Fuzz / harfbuzz

Package

Name
harfbuzz
Purl
pkg:generic/harfbuzz

Affected ranges

Type
GIT
Repo
https://github.com/harfbuzz/harfbuzz.git
Events
Introduced
fb7af519b5a0e2d72b0621c05ba70fb1b2eaacaf
Fixed
6c2107ace765f95c67d65a21f94b54a2f12d80dc

Affected versions

11.*
11.5.0
11.5.1
12.*
12.0.0
12.1.0
12.2.0
12.3.0
12.3.1
12.3.2
13.*
13.0.0
13.0.1
13.1.0
13.1.1
13.2.0
13.2.1
14.*
14.0.0
14.1.0
14.2.0
14.2.1
14.3.0
14.3.1

Ecosystem specific 

{
    "severity": "MEDIUM"
}

Database specific

introduced_range 
"dd291f482cc4131c0b3e9107d5eb474f89b67443:d59f62ac14b98a0b8c72ec7a00eb76b22b1800c8"
source 
"https://github.com/google/oss-fuzz-vulns/blob/main/vulns/harfbuzz/OSV-2026-962.yaml"