yasm: patch CVE-2023-29579

Details: https://nvd.nist.gov/vuln/detail/CVE-2023-29579

The patch was taken from Debian:
https://sources.debian.org/patches/yasm/1.3.0-8/1000-x86-dir-cpu-CVE-2023-29579.patch/

Signed-off-by: Gyorgy Sarvari <skandigraun@gmail.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
(cherry picked from commit cc30757a7fd0af5f60b9a6408b3eb94c0810acda)

2 files changed, 41 insertions, 1 deletions

diff --git a/meta-oe/recipes-devtools/yasm/yasm/CVE-2023-29579.patch b/meta-oe/recipes-devtools/yasm/yasm/CVE-2023-29579.patch
new file mode 100644
index 0000000000..58b4ed1996
--- /dev/null
+++ b/meta-oe/recipes-devtools/yasm/yasm/CVE-2023-29579.patch
@@ -0,0 +1,39 @@
+From 81c1b7b0a28f052eaadddcb010944bf67e6ae257 Mon Sep 17 00:00:00 2001
+From: Gyorgy Sarvari <skandigraun@gmail.com>
+Date: Sat, 15 Nov 2025 13:24:21 +0100
+Subject: [PATCH] Make sure CPU feature parsing use large enough string buffer.
+  Fixes CVE-2023-29579.
+
+Author: Petter Reinholdtsen <pere@debian.org>
+Bug: https://github.com/yasm/yasm/issues/214
+Bug-Debian: https://bugs.debian.org/1035951
+Forwarded:  https://github.com/yasm/yasm/issues/214
+Last-Update: 2025-04-30
+
+This patch is taken from Debian:
+https://sources.debian.org/patches/yasm/1.3.0-8/1000-x86-dir-cpu-CVE-2023-29579.patch/
+
+CVE: CVE-2023-29579
+Upstream-Status: Submitted [https://github.com/yasm/yasm/issues/214]
+
+Signed-off-by: Gyorgy Sarvari <skandigraun@gmail.com>
+---
+ modules/arch/x86/x86arch.c | 5 +++--
+ 1 file changed, 3 insertions(+), 2 deletions(-)
+
+diff --git a/modules/arch/x86/x86arch.c b/modules/arch/x86/x86arch.c
+index bac11774..58327958 100644
+--- a/modules/arch/x86/x86arch.c
++++ b/modules/arch/x86/x86arch.c
+@@ -165,8 +165,9 @@ x86_dir_cpu(yasm_object *object, yasm_valparamhead *valparams,
+                 yasm_error_set(YASM_ERROR_SYNTAX,
+                                N_("invalid argument to [%s]"), "CPU");
+             else {
+-                char strcpu[16];
+-                sprintf(strcpu, "%lu", yasm_intnum_get_uint(intcpu));
++                char strcpu[21]; /* 21 = ceil(log10(LONG_MAX)+1) */
++                assert(8*sizeof(unsigned long) <= 64);
++                snprintf(strcpu, sizeof(strcpu), "%lu", yasm_intnum_get_uint(intcpu));
+                 yasm_x86__parse_cpu(arch_x86, strcpu, strlen(strcpu));
+             }
+         } else
diff --git a/meta-oe/recipes-devtools/yasm/yasm_git.bb b/meta-oe/recipes-devtools/yasm/yasm_git.bb
index d1c37cb2ae..d89f9aebe3 100644
--- a/meta-oe/recipes-devtools/yasm/yasm_git.bb
+++ b/meta-oe/recipes-devtools/yasm/yasm_git.bb
@@ -14,7 +14,8 @@ SRC_URI = "git://github.com/yasm/yasm.git;branch=master;protocol=https \
            file://CVE-2023-31975.patch \
            file://CVE-2023-37732.patch \
            file://CVE-2024-22653.patch \
-"
+           file://CVE-2023-29579.patch \
+           "
 
 S = "${WORKDIR}/git"