CVE-2021-26951 json
Out of bounds write in calamine
published 2021-01-06 5 y ago modified 2026-06-17 4 mo ago also GHSA-ppqp-78xx-3r38 , RUSTSEC-2021-0015 , EUVD-2021-1826
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.7%
- EPSS 1.7% chance of exploitation in 30 days, percentile 77%
- public exploits
- 0
- none known
Summary
An issue was discovered in the calamine crate before 0.17.0 for Rust. It allows attackers to overwrite heap-memory locations because Vec::set_len is used without proper memory claiming, and this uninitialized memory is used for a user-provided Read operation, as demonstrated by Sectors::get.
Patch / fix
- crates.io calamine 0.17.0
- calamine_project calamine 0.17.0
Exploit prediction
1.75% chance of exploitation in the next 30 days, higher than 77% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- rustsec.org https://rustsec.org/advisories/RUSTSEC-2021-0015.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 |
| OSV | 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 | calamine | <0.17.0 >=0.0.0-0, <0.17.0 |
0.17.0 |
Classification
References
-
rustsec.org
/advisories/RUSTSEC-2021-0015.html
web, exploit, vendor-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-26951
advisory
-
github.com
/tafia/calamine/issues/199
web, report
-
github.com
/tafia/calamine
package
-
crates.io
/crates/calamine
package
Sources
- CVE List CVE-2021-26951
- GitHub Advisory GHSA-ppqp-78xx-3r38
- NVD CVE-2021-26951
- OSV RUSTSEC-2021-0015
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.