This patch applies the upstream fix as referenced in [1], using the commit shown in [2].
[1] https://nvd.nist.gov/vuln/detail/CVE-2026-41991 [2] https://cgit.git.savannah.gnu.org/cgit/gzip.git/commit/?id=4e6f8b24ab823146ab8776f0b7fe486ab34d4269 Adapted for gzip 1.14: - Refreshed NEWS hunks to match 1.14 release context. Signed-off-by: Jaipaul Cheernam <[email protected]> --- .../gzip/gzip-1.14/CVE-2026-41991.patch | 86 +++++++++++++++++++ meta/recipes-extended/gzip/gzip_1.14.bb | 1 + 2 files changed, 87 insertions(+) create mode 100644 meta/recipes-extended/gzip/gzip-1.14/CVE-2026-41991.patch diff --git a/meta/recipes-extended/gzip/gzip-1.14/CVE-2026-41991.patch b/meta/recipes-extended/gzip/gzip-1.14/CVE-2026-41991.patch new file mode 100644 index 0000000000..b1a3644020 --- /dev/null +++ b/meta/recipes-extended/gzip/gzip-1.14/CVE-2026-41991.patch @@ -0,0 +1,86 @@ +From 661918c7c0d5acf52508107d6bcdeb72a526ce52 Mon Sep 17 00:00:00 2001 +From: Paul Eggert <[email protected]> +Date: Thu, 16 Apr 2026 12:11:44 -0700 +Subject: [PATCH] gzexe: use -C if lacking mktemp +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +(Problem reported by Michał Majchrowicz.) +* gzexe.in: If mktemp is needed but not installed, +use ‘set -C’ to avoid a race when creating a temporary file. +* zdiff.in: Use the same pattern here, even though the old +code was probably OK anyway. + +CVE: CVE-2026-41991 +Upstream-Status: Backport [https://cgit.git.savannah.gnu.org/cgit/gzip.git/commit/?id=4e6f8b24ab823146ab8776f0b7fe486ab34d4269] +Signed-off-by: Jaipaul Cheernam <[email protected]> +--- + NEWS | 13 +++++++++---- + gzexe.in | 1 + + zdiff.in | 7 +++---- + 3 files changed, 13 insertions(+), 8 deletions(-) + +diff --git a/NEWS b/NEWS +index 881b6b6..3a05d7e 100644 +--- a/NEWS ++++ b/NEWS +@@ -4,10 +4,6 @@ GNU gzip NEWS -*- outline -*- + + ** Bug fixes + +- A buffer overflow has been fixed when decompressing an .lzh file +- after decompressing a .Z file. +- [bug present since the beginning] +- + 'gzip -d' no longer omits the last partial output buffer when the + input ends unexpectedly on an IBM Z platform. + [bug introduced in gzip-1.11] +@@ -18,6 +14,15 @@ GNU gzip NEWS -*- outline -*- + 'gzip -S' now rejects suffixes containing '/'. + [bug present since the beginning] + ++ A buffer overflow has been fixed when decompressing an .lzh file ++ after decompressing a .Z file. ++ [bug present since the beginning] ++ ++ On old-fashioned or limited platforms lacking mktemp, gzexe and ++ zdiff no longer have a race when creating a temporary file. ++ [bug present since the beginning] ++ ++ + ** Changes in behavior + + The GZIP environment variable is now silently ignored except for the +diff --git a/gzexe.in b/gzexe.in +index 1267d6e..09a2571 100644 +--- a/gzexe.in ++++ b/gzexe.in +@@ -127,6 +127,7 @@ for i do + tmp=`mktemp "${dir}gzexeXXXXXXXXX"` + else + tmp=${dir}gzexe$$ ++ (umask 77; set -C; > "$tmp") + fi && { cp -p "$file" "$tmp" 2>/dev/null || cp "$file" "$tmp"; } || { + res=$? + printf >&2 '%s\n' "$0: cannot copy $file" +diff --git a/zdiff.in b/zdiff.in +index a8689a0..c04a8c0 100644 +--- a/zdiff.in ++++ b/zdiff.in +@@ -156,12 +156,11 @@ case $file2 in + *) TMPDIR=/tmp/;; + esac + if command -v mktemp >/dev/null 2>&1; then +- tmp=`mktemp "${TMPDIR}zdiffXXXXXXXXX"` || +- exit 2 ++ tmp=`mktemp "${TMPDIR}zdiffXXXXXXXXX"` + else +- set -C + tmp=${TMPDIR}zdiff$$ +- fi ++ (umask 77; set -C; > "$tmp") ++ fi && + 'gzip' -cdfq -- "$file2" > "$tmp" || exit 2 + gzip_status=$( + exec 4>&1 diff --git a/meta/recipes-extended/gzip/gzip_1.14.bb b/meta/recipes-extended/gzip/gzip_1.14.bb index 99174a58c5..d6bd36f89f 100644 --- a/meta/recipes-extended/gzip/gzip_1.14.bb +++ b/meta/recipes-extended/gzip/gzip_1.14.bb @@ -7,6 +7,7 @@ LICENSE = "GPL-3.0-or-later" SRC_URI = "${GNU_MIRROR}/gzip/${BP}.tar.gz \ file://run-ptest \ file://CVE-2026-41992.patch \ + file://CVE-2026-41991.patch \ " SRC_URI:append:class-target = " file://wrong-path-fix.patch"
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