Linux Kills Strncpy
Introduction The C string library is compact, fast and efficient. However, if not used correctly and carefully, it leads to buffer overrun errors which either cause programs to crash or worse allow arbitrary code to execute. Hackers have found errors in the use of C string functions to be a goldmine in security weaknesses to exploit.
- ▪Introduction The C string library is compact, fast and efficient.
- ▪However, if not used correctly and carefully, it leads to buffer overrun errors which either cause programs to crash or worse allow arbitrary code to execute.
- ▪Hackers have found errors in the use of C string functions to be a goldmine in security weaknesses to exploit.
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| Original publisher | Stephen Smith's Blog |
| Canonical URL | https://smist08.wordpress.com/2026/06/25/linux-kills-strncpy/ |
| Publication time | Fri, 26 Jun 2026 06:19:39 +0000 |
| Retrieval time | 2026-06-26T06:37:29.198Z |
| Last seen | 2026-06-26T06:37:29.198Z |
| Headline source | Publisher (no WeSearch rewrite) |
| Excerpt source | publisher body |
| Excerpt method | First ~120 words (~800 chars) of extracted publisher body, fair-use limited. |
| Summary | WeSearch · cerebras-chat (WeSearch summarizer) |
| Summary source text | contentText |
| Citation coverage | Summary is a WeSearch-generated derivative; primary citation is the original publisher URL. |
| Cluster | Zx5Dd3wqyX2z |
| Cluster logic | Grouped by semantic title/content similarity across sources within a rolling window. Same-publisher template collisions are excluded from coverage comparison. |
| Ranking reason | Story pages are not engagement-ranked. Hub feeds use recency, with optional source-diversified chronological ordering (cap consecutive stories per source). No personalized ranking. |
| Publisher visit | Yes — open original |
| Substitutes article? | No — link-out required for full text |
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| Indexing | May the item be indexed (stored, ranked, made findable)? | Allowed |
| Snippet | May a short excerpt of the publisher's text be shown? | Allowed |
| AI summary | May WeSearch generate its own short summary of the article? | Limited |
| Retrieval / RAG | May the content be exposed for third-party retrieval-augmented generation? | Not asserted |
| Model training | May the content be used to train AI models? | Not asserted |
| Commercial reuse | May the content be reused commercially? | Not permitted |
Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.
Opening excerpt (first ~120 words) tap to expand
Introduction The C string library is compact, fast and efficient. However, if not used correctly and carefully, it leads to buffer overrun errors which either cause programs to crash or worse allow arbitrary code to execute. Hackers have found errors in the use of C string functions to be a goldmine in security weaknesses to exploit. The Linux kernel is written in C and uses these string functions and has been spending a lot of time fixing problems in the kernel’s string usage and improving the string library’s API. The original root of many problems is the strcpy(dest, src); function which copies bytes from the src to the dest until a NULL terminator is reached. The problem being if the src string is larger than the destination buffer or the src string isn’t NULL terminated at all.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at Stephen Smith's Blog.
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