CVE-2026-50643Out‑of‑Bounds Read in 8cc
Updated under an hour ago ()
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It affects rui314 8cc. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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8cc is vulnerable to an Out‑of‑Bounds Read due to improper handling of #line directives and GNU linemarkers. The compiler accepts attacker-controlled filename and line number metadata and later uses it without validation when accessing source line arrays. By supplying invalid or oversized line numbers, an attacker can trigger out-of-bounds memory access and a crash. Maintainer of this project was notified early about this vulnerability, but didn't respond with the details of vulnerability or vulnerable version range. Version corresponding to the commit b480958 was tested and confirmed as vulnerable, other versions were not tested but might also be vulnerable.
- CVSS
- 5.1 MEDIUM (v4.0, CNA)CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N
- Weakness (CWE)
- CWE-125
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- CERT-PL
- NVD analysis
- Deferred
- Record last updated
- Jun 18, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
rui314 8cc rui314:8cc (from the name) | b480958 | CNA record |
References
- https://cert.pl/en/posts/2026/06/CVE-2026-50641third-party-advisory
- https://github.com/rui314/8ccproduct
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.