| Title | GNU Binutils 2.47 Memory Corruption |
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| Description | A vulnerability was found in GNU Binutils 2.47. The ld linker has an assertion failure in _bfd_write_merged_section (bfd/merge.c:1121) when linking malformed ELF files with --shared -z now options. When the merge state of a merged section is inconsistent with its content, the BFD_ASSERT triggers. In non-assert builds (ASAN/release), this causes a NULL pointer dereference SEGV. Reproducer: ld --shared -z now -o /dev/null bug_11.o (with PoC file). Stack trace: #0 _bfd_write_merged_section bfd/merge.c:1121, #1 elf_link_input_bfd bfd/elflink.c:12213, #2 _bfd_elf_final_link bfd/elflink.c:13189, #3 ldwrite ld/ldwrite.c:548, #4 main ld/ldmain.c:1001. |
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| Source | ⚠️ https://sourceware.org/bugzilla/show_bug.cgi?id=34452 |
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| User | wsstssw (UID 100468) |
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| Submission | 08/12/2026 03:15 (1 month ago) |
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| Moderation | 09/13/2026 21:21 (1 month later) |
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| Status | Accepted |
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| VulDB entry | 403332 [GNU Binutils 2.47 Section Merge bfd/merge.c _bfd_write_merged_section null pointer dereference] |
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| Points | 20 |
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