fold: fix processing of malformed UTF-8 sequences

Resolves: RHEL-136086

coreutils-i18n.patch

@@ -203,7 +203,7 @@ index 8cd0d6b..d23edd5 100644
                /* Look for the last blank. */
                while (logical_end)
                  {
-@@ -215,11 +252,221 @@ fold_file (char const *filename, size_t width)
+@@ -215,11 +252,222 @@ fold_file (char const *filename, size_t width)
        line_out[offset_out++] = c;
      }
  
@@ -282,6 +282,7 @@ index 8cd0d6b..d23edd5 100644
 +
 +      /* Get a wide character. */
 +      state_bak = state;
++      convfail = 0;
 +      mblength = mbrtowc ((wchar_t *)&wc, bufpos, buflen, &state);
 +
 +      switch (mblength)

coreutils.spec

@@ -1,7 +1,7 @@
 Summary: A set of basic GNU tools commonly used in shell scripts
 Name:    coreutils
 Version: 8.32
-Release: 39%{?dist}
+Release: 40%{?dist}
 License: GPLv3+
 Url:     https://www.gnu.org/software/coreutils/
 Source0: https://ftp.gnu.org/gnu/%{name}/%{name}-%{version}.tar.xz
@@ -333,6 +333,9 @@ rm -f $RPM_BUILD_ROOT%{_infodir}/dir
 %license COPYING
 
 %changelog
+* Thu Jan 15 2026 Lukáš Zaoral <lzaoral@redhat.com> - 8.32-40
+- fold: fix processing of malformed UTF-8 sequences (RHEL-136086)
+
 * Mon Dec 09 2024 Lukáš Zaoral <lzaoral@redhat.com> - 8.32-39
 - fix sort fdlimit test failures on s390x with /dev/z90crypt (RHEL-60290)