CVE-2020-36514
`Read` on uninitialized buffer in `fill_buf()` and `read_up_to()`
An issue was discovered in the acc_reader crate through 2020-12-27 for Rust. fill_buf may read from uninitialized memory locations.
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
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
An issue was discovered in the acc_reader crate through 2020-12-27 for Rust. fill_buf may read from uninitialized memory locations.
- Record
CVE-2020-36514- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-908
- Updated
- 2026-11-02
CVE List No score
An issue was discovered in the acc_reader crate through 2020-12-27 for Rust. fill_buf may read from uninitialized memory locations.
- Record
CVE-2020-36514- Updated
- 2026-11-02
EUVDEUVD-2022-0657 No score
An issue was discovered in the acc_reader crate through 2020-12-27 for Rust. fill_buf may read from uninitialized memory locations.
- Record
EUVD-2022-0657- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-p4cr-64x4-f92f
Use of Uninitialized Resource in acc_reader.
An issue was discovered in the acc_reader crate through 2020-12-27 for Rust. fill_buf may read from uninitialized memory locations.
- Record
GHSA-p4cr-64x4-f92f- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-908
- Updated
- 2026-11-02
GitHub AdvisoriesGHSA-hv9v-7w3v-rj6f No score
`Read` on uninitialized buffer in `fill_buf()` and `read_up_to()`
Affected versions of this crate passes an uninitialized buffer to a user-provided Read implementation.
Arbitrary Read implementations can read from the uninitialized buffer (memory exposure) and also can return incorrect number of bytes written to the buffer.
Reading from uninitialized memory produces undefined values that can quickly invoke undefined behavior.
- Record
GHSA-hv9v-7w3v-rj6f- Updated
- 2026-11-02
OSVGHSA-799f-r78p-gq9c
Use of Uninitialized Resource in acc_reader.
An issue was discovered in the acc_reader crate through 2020-12-27 for Rust. read_up_to may read from uninitialized memory locations.
- Record
GHSA-799f-r78p-gq9c- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-908
- Updated
- 2026-11-02
OSVGHSA-p4cr-64x4-f92f
Use of Uninitialized Resource in acc_reader.
An issue was discovered in the acc_reader crate through 2020-12-27 for Rust. fill_buf may read from uninitialized memory locations.
- Record
GHSA-p4cr-64x4-f92f- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-908
- Updated
- 2026-11-02
OSVGHSA-hv9v-7w3v-rj6f No score
`Read` on uninitialized buffer in `fill_buf()` and `read_up_to()`
Affected versions of this crate passes an uninitialized buffer to a user-provided Read implementation.
Arbitrary Read implementations can read from the uninitialized buffer (memory exposure) and also can return incorrect number of bytes written to the buffer.
Reading from uninitialized memory produces undefined values that can quickly invoke undefined behavior.
- Record
GHSA-hv9v-7w3v-rj6f- Updated
- 2026-11-02
OSVRUSTSEC-2020-0155 No score
`Read` on uninitialized buffer in `fill_buf()` and `read_up_to()`
Affected versions of this crate passes an uninitialized buffer to a user-provided Read implementation.
Arbitrary Read implementations can read from the uninitialized buffer (memory exposure) and also can return incorrect number of bytes written to the buffer.
Reading from uninitialized memory produces undefined values that can quickly invoke undefined behavior.
- Record
RUSTSEC-2020-0155- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
acc_readercrates.io |
through 2.0.0 | None known |
acc_readercrates.io From an advisory covering 2 CVEs |
through 2.0.0 | None known |
acc_readercrates.io From an advisory covering 2 CVEs |
0.0.0-0 and later | None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| 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-2020-36514 is a critical vulnerability (CVSS 9.8) in Acc Reader Project Reader, published December 27, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.23%, the 69th percentile. No source names a fixed version.
References
rustsec.org/advisories/RUSTSEC-2020-0155.html
raw.githubusercontent.com/rustsec/advisory-db/main/crates/acc_reader/RUSTSEC-2020-0155.md
github.com/netvl/acc_reader/issues/1
nvd.nist.gov/vuln/detail/CVE-2020-36514
crates.io/crates/acc_reader