CVE-2021-26956 json
An issue was discovered in the xcb crate through 2021-02-04 for Rust.
published 5y ago modified 4mo ago also EUVD-2021-1806
- 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 78%
- public exploits
- 0
- none known
Summary
An issue was discovered in the xcb crate through 2021-02-04 for Rust. It has a soundness violation because bytes from an X server can be interpreted as any data type returned by xcb::xproto::GetPropertyReply::value.
Patch / fix
- rust-xcb Debian 14, Debian 13, Debian 12 1.1.1-1
debian advisories DEBIAN-CVE-2021-26956
Is CVE-2021-26956 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerExploit prediction
1.75% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- rustsec.org https://rustsec.org/advisories/RUSTSEC-2021-0019.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 |
References
-
rustsec.org
/advisories/RUSTSEC-2021-0019.html
exploit, vendor-advisory
Sources
- CVE List CVE-2021-26956
- NVD CVE-2021-26956
Fencer Intel 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.