CVE-2021-28030
Use of Uninitialized Resource in truetype
An issue was discovered in the truetype crate before 0.30.1 for Rust. Attackers can read the contents of uninitialized memory locations via a user-provided Read operation within Tape::take_bytes.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
An issue was discovered in the truetype crate before 0.30.1 for Rust. Attackers can read the contents of uninitialized memory locations via a user-provided Read operation within Tape::take_bytes.
- Record
CVE-2021-28030- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:P/I:N/A:N - Weakness
- CWE-908
- Updated
- 2026-11-02
CVE ListNo score
An issue was discovered in the truetype crate before 0.30.1 for Rust. Attackers can read the contents of uninitialized memory locations via a user-provided Read operation within Tape::take_bytes.
- Record
CVE-2021-28030- Updated
- 2026-11-02
EUVDEUVD-2021-1887No score
An issue was discovered in the truetype crate before 0.30.1 for Rust. Attackers can read the contents of uninitialized memory locations via a user-provided Read operation within Tape::take_bytes.
- Record
EUVD-2021-1887- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-v7q4-97x4-4qw2
Use of Uninitialized Resource in truetype
An issue was discovered in the truetype crate before 0.30.1 for Rust. Attackers can read the contents of uninitialized memory locations via a user-provided Read operation within Tape::take_bytes.
- Record
GHSA-v7q4-97x4-4qw2- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-908
- Updated
- 2026-11-02
OSVGHSA-v7q4-97x4-4qw2
Use of Uninitialized Resource in truetype
An issue was discovered in the truetype crate before 0.30.1 for Rust. Attackers can read the contents of uninitialized memory locations via a user-provided Read operation within Tape::take_bytes.
- Record
GHSA-v7q4-97x4-4qw2- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-908
- Updated
- 2026-11-02
OSVRUSTSEC-2021-0029
Tape::take_bytes exposes uninitialized memory to a user-provided Read
Affected versions of this crate passed an unininitialized buffer to a
user-provided Read instance in Tape::take_bytes.
This can result in safe Read implementations reading from the uninitialized
buffer leading to undefined behavior.
The flaw was corrected in commit 1f2dc7f37dd by removing the unsafe block
and zero-initializing the buffer.
- Record
RUSTSEC-2021-0029- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
Affected products
Affected packages
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-28030 is a high vulnerability (CVSS 7.5) in Truetype Project Truetype, published February 17, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.18%, the 68th percentile. Fixed in truetype 0.30.1.