CVE-2021-29937 json
Free of uninitialized memory in telemetry
published 2021-02-17 5 y ago modified 2026-09-10 1 mo ago also GHSA-hpcx-3pw8-g3j2 , RUSTSEC-2021-0046 , EUVD-2021-1750
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.4%
- EPSS 1.4% chance of exploitation in 30 days, percentile 73%
- public exploits
- 0
- none known
Summary
An issue was discovered in the telemetry crate through 2021-02-17 for Rust. There is a drop of uninitialized memory if a value.clone() call panics within misc::vec_with_size().
Patch / fix
Exploit prediction
1.42% chance of exploitation in the next 30 days, higher than 73% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- rustsec.org https://rustsec.org/advisories/RUSTSEC-2021-0046.html referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
| GitHub | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| crates.io | telemetry | <0.1.3 |
0.1.3 |
Classification
- Weakness
-
- CWE-908 Use of Uninitialized Resource
References
-
github.com
/Yoric/telemetry.rs/commit/2820cf12f2e08645fd6d1f15b4a90a54d6082a81
web
-
rustsec.org
/advisories/RUSTSEC-2021-0046.html
web, exploit, vendor-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-29937
advisory
-
github.com
/Yoric/telemetry.rs/issues/45
web, report
-
github.com
/Yoric/telemetry.rs
package
-
crates.io
/crates/telemetry
package
Sources
- CVE List CVE-2021-29937
- GitHub Advisory GHSA-hpcx-3pw8-g3j2
- NVD CVE-2021-29937
- OSV RUSTSEC-2021-0046
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.