From ae50fe724fd335798449ff0db8ef2181c54a309d Mon Sep 17 00:00:00 2001 From: Nick Clifton Date: Mon, 10 Nov 2025 13:53:03 +0000 Subject: [PATCH] Fix a potential illegal memory access when linking a corrupt input file. Resolves: RHEL-126877 --- binutils-CVE-2025-11083.patch | 71 +++++++++++++++++++++++++++++++++++ binutils.spec | 10 ++++- 2 files changed, 80 insertions(+), 1 deletion(-) create mode 100644 binutils-CVE-2025-11083.patch diff --git a/binutils-CVE-2025-11083.patch b/binutils-CVE-2025-11083.patch new file mode 100644 index 0000000..e235846 --- /dev/null +++ b/binutils-CVE-2025-11083.patch @@ -0,0 +1,71 @@ +From 9ca499644a21ceb3f946d1c179c38a83be084490 Mon Sep 17 00:00:00 2001 +From: "H.J. Lu" +Date: Thu, 18 Sep 2025 16:59:25 -0700 +Subject: [PATCH] elf: Don't match corrupt section header in linker input + +Don't swap in nor match corrupt section header in linker input to avoid +linker crash later. + + PR ld/33457 + * elfcode.h (elf_swap_shdr_in): Changed to return bool. Return + false for corrupt section header in linker input. + (elf_object_p): Reject if elf_swap_shdr_in returns false. + +Signed-off-by: H.J. Lu +--- + bfd/elfcode.h | 14 +++++++++----- + 1 file changed, 9 insertions(+), 5 deletions(-) + +--- binutils-2.41.orig/bfd/elfcode.h 2025-11-10 13:05:26.741890763 +0000 ++++ binutils-2.41/bfd/elfcode.h 2025-11-10 13:07:45.446523690 +0000 +@@ -311,7 +311,7 @@ elf_swap_ehdr_out (bfd *abfd, + /* Translate an ELF section header table entry in external format into an + ELF section header table entry in internal format. */ + +-static void ++static bool + elf_swap_shdr_in (bfd *abfd, + const Elf_External_Shdr *src, + Elf_Internal_Shdr *dst) +@@ -341,6 +341,9 @@ elf_swap_shdr_in (bfd *abfd, + { + _bfd_error_handler (_("warning: %pB has a section " + "extending past end of file"), abfd); ++ /* PR ld/33457: Don't match corrupt section header. */ ++ if (abfd->is_linker_input) ++ return false; + abfd->read_only = 1; + } + } +@@ -350,6 +353,7 @@ elf_swap_shdr_in (bfd *abfd, + dst->sh_entsize = H_GET_WORD (abfd, src->sh_entsize); + dst->bfd_section = NULL; + dst->contents = NULL; ++ return true; + } + + /* Translate an ELF section header table entry in internal format into an +@@ -642,9 +646,9 @@ elf_object_p (bfd *abfd) + + /* Read the first section header at index 0, and convert to internal + form. */ +- if (bfd_bread (&x_shdr, sizeof x_shdr, abfd) != sizeof (x_shdr)) ++ if (bfd_bread (&x_shdr, sizeof x_shdr, abfd) != sizeof (x_shdr) ++ || !elf_swap_shdr_in (abfd, &x_shdr, &i_shdr)) + goto got_no_match; +- elf_swap_shdr_in (abfd, &x_shdr, &i_shdr); + + /* If the section count is zero, the actual count is in the first + section header. */ +@@ -730,9 +734,9 @@ elf_object_p (bfd *abfd) + to internal form. */ + for (shindex = 1; shindex < i_ehdrp->e_shnum; shindex++) + { +- if (bfd_bread (&x_shdr, sizeof x_shdr, abfd) != sizeof (x_shdr)) ++ if (bfd_bread (&x_shdr, sizeof x_shdr, abfd) != sizeof (x_shdr) ++ || !elf_swap_shdr_in (abfd, &x_shdr, i_shdrp + shindex)) + goto got_no_match; +- elf_swap_shdr_in (abfd, &x_shdr, i_shdrp + shindex); + + /* Sanity check sh_link and sh_info. */ + if (i_shdrp[shindex].sh_link >= num_sec) diff --git a/binutils.spec b/binutils.spec index 35994c2..0cb1543 100644 --- a/binutils.spec +++ b/binutils.spec @@ -2,7 +2,7 @@ Summary: A GNU collection of binary utilities Name: binutils%{?_with_debug:-debug} Version: 2.41 -Release: 59%{?dist} +Release: 60%{?dist} License: GPL-3.0-or-later AND (GPL-3.0-or-later WITH Bison-exception-2.2) AND (LGPL-2.0-or-later WITH GCC-exception-2.0) AND BSD-3-Clause AND GFDL-1.3-or-later AND GPL-2.0-or-later AND LGPL-2.1-or-later AND LGPL-2.0-or-later URL: https://sourceware.org/binutils @@ -392,6 +392,11 @@ Patch62: binutils-CVE-2025-5244.patch # Lifetime: Fixed in 2.46 Patch63: binutils-CVE-2025-11082.patch +# Purpose: Stops a potential illegal memory access when linking a corrupt +# input file. PR 33457 +# Lifetime: Fixed in 2.46 +Patch64: binutils-CVE-2025-11083.patch + #---------------------------------------------------------------------------- # Purpose: Suppress the x86 linker's p_align-1 tests due to kernel bug on CentOS-10 @@ -1431,6 +1436,9 @@ exit 0 #---------------------------------------------------------------------------- %changelog +* Mon Nov 10 2025 Nick Clifton - 2.41-60 +- Fix a potential illegal memory access when linking a corrupt input file. (RHEL-126877) + * Tue Nov 04 2025 Nick Clifton - 2.41-59 - Fix a potential illegal memory access when linking a corrupt input file. (RHEL-125205)