PT-2025-11651 · Ghc · Ghc

Published 2025-03-18 · Updated 2025-11-14

OSV

Subword division operations may produce incorrect results

Arithmetic operations may produce incorrect results when compiled with optimizations. For the most part, this bug only causes availability and data integrity issues. However, in some circumstances, it may result in other, more complicated security related flaws, such as buffer overflow conditions.

Related Identifiers

HSEC-2025-0001

Affected Products

Ghc

References · 10

• https://osv.dev/vulnerability/HSEC-2025-0001 · Vendor Advisory
• https://github.com/haskell/security-advisories · Note
• https://gitlab.haskell.org/ghc/ghc/-/issues/26711 · Note
• https://discourse.haskell.org/t/critical-code-generation-bug-with-ghc-9-12-3/13505/2 · Note
• https://gitlab.haskell.org/ghc/ghc/-/merge_requests/13820 · Note
• https://raw.githubusercontent.com/haskell/security-advisories/refs/heads/generated/osv-export · Note
• https://gitlab.haskell.org/ghc/ghc/-/issues/25653 · Note
• https://haskell.github.io/security-advisories · Note
• https://discourse.haskell.org/t/psa-correctness-issue-in-ghc-9-12/11204 · Note
• https://gitlab.haskell.org/ghc/ghc/-/issues/26668 · Note