Landing: 952275b4a6c4
Project / Subsystem
binutils / risc-v
Date
2026-06-05
Author
Jan Beulich <jbeulich@sourceware.org>
Commit
952275b4a6c44fee709cb47236df9f604327d1d4
Source
public_inbox
Perf win
No
Breaking
No
All attributes
- project
- binutils
- subsystem
- risc-v
- patch_id
- —
- commit_hash
- 952275b4a6c44fee709cb47236df9f604327d1d4
- source_type
- public_inbox
- headline
- Avoid buffer underrun in subset parsing
- tldr
- The RISC-V ISA extension parser now prevents buffer underruns by adding boundary checks and correcting indentation.
- author
- Jan Beulich <jbeulich@sourceware.org>
- outcome
- committed
- performance_win
- false
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • risc-v
- • bugfix
- • security
- • parser
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-06-05T00:00:00.000Z
This commit fixes a potential buffer underrun vulnerability in the RISC-V ISA extension parsing logic by adding explicit boundary checks. Previous code could attempt to access memory before the start of a buffer when validating extension names, which constitutes undefined behavior. The fix adds q > subset checks before dereferencing *(q - 1) or *(q - 2). Additionally, indentation issues were corrected to improve code readability and maintainability.