{"id":2225819,"url":"http://patchwork.ozlabs.org/api/patches/2225819/?format=json","web_url":"http://patchwork.ozlabs.org/project/buildroot/patch/20260421162617.2830354-1-titouan.christophe@mind.be/","project":{"id":27,"url":"http://patchwork.ozlabs.org/api/projects/27/?format=json","name":"Buildroot development","link_name":"buildroot","list_id":"buildroot.buildroot.org","list_email":"buildroot@buildroot.org","web_url":"","scm_url":"","webscm_url":"","list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<20260421162617.2830354-1-titouan.christophe@mind.be>","list_archive_url":null,"date":"2026-04-21T16:26:17","name":"[for,2025.02.x] package/dash: add patch for CVE-2026-31323","commit_ref":null,"pull_url":null,"state":"accepted","archived":false,"hash":"5437b6be79ec451a4fc6b82cc2a7543a4a85b383","submitter":{"id":90763,"url":"http://patchwork.ozlabs.org/api/people/90763/?format=json","name":"Titouan Christophe","email":"titouan.christophe@mind.be"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/buildroot/patch/20260421162617.2830354-1-titouan.christophe@mind.be/mbox/","series":[{"id":500849,"url":"http://patchwork.ozlabs.org/api/series/500849/?format=json","web_url":"http://patchwork.ozlabs.org/project/buildroot/list/?series=500849","date":"2026-04-21T16:26:17","name":"[for,2025.02.x] package/dash: add patch for CVE-2026-31323","version":1,"mbox":"http://patchwork.ozlabs.org/series/500849/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2225819/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2225819/checks/","tags":{},"related":[],"headers":{"Return-Path":"","X-Original-To":["incoming-buildroot@patchwork.ozlabs.org","buildroot@buildroot.org"],"Delivered-To":["patchwork-incoming-buildroot@legolas.ozlabs.org","buildroot@buildroot.org"],"Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=buildroot.org header.i=@buildroot.org\n header.a=rsa-sha256 header.s=default header.b=kvdxJul8;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=buildroot.org\n (client-ip=140.211.166.137; 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charset=\"us-ascii\"","Content-Transfer-Encoding":"7bit","Errors-To":"buildroot-bounces@buildroot.org","Sender":"\"buildroot\" "},"content":"The vulnerability description is not disclosed yet.\n\nSigned-off-by: Titouan Christophe \n---\n package/dash/0002-fix-CVE-2026-31323.patch | 42 ++++++++++++++++++++++\n package/dash/dash.mk | 3 ++\n 2 files changed, 45 insertions(+)\n create mode 100644 package/dash/0002-fix-CVE-2026-31323.patch","diff":"diff --git a/package/dash/0002-fix-CVE-2026-31323.patch b/package/dash/0002-fix-CVE-2026-31323.patch\nnew file mode 100644\nindex 0000000000..5c92119db5\n--- /dev/null\n+++ b/package/dash/0002-fix-CVE-2026-31323.patch\n@@ -0,0 +1,42 @@\n+From 0034bfe185d3d875cebace8cb3ca5c9dabf9e0f3 Mon Sep 17 00:00:00 2001\n+From: Muchen Hou <996029583@qq.com>\n+Date: Mon, 13 Apr 2026 10:28:29 +0800\n+Subject: arith: Fix CVE-2026-31323 INTMAX_MIN / -1 overflow\n+\n+Division and remainder currently guard against division by zero, but not\n+against the signed overflow case INTMAX_MIN / -1. On affected systems\n+this can trigger SIGFPE during arithmetic expansion.\n+\n+Add an explicit guard before evaluating division or remainder.\n+\n+Signed-off-by: Muchen Hou <996029583@qq.com>\n+\n+Merge the overflow check with the zero division check.\n+\n+Signed-off-by: Herbert Xu \n+\n+CVE: CVE-2026-31323\n+Upstream: https://git.kernel.org/pub/scm/utils/dash/dash.git/commit/?h=601bc50bfc2858ab7a9ec327fe4e33a9c4877759&id=0034bfe185d3d875cebace8cb3ca5c9dabf9e0f3\n+Signed-off-by: Titouan Christophe \n+---\n+ src/arith_yacc.c | 4 ++--\n+ 1 file changed, 2 insertions(+), 2 deletions(-)\n+\n+diff --git a/src/arith_yacc.c b/src/arith_yacc.c\n+index 1a087c3..b978ef0 100644\n+--- a/src/arith_yacc.c\n++++ b/src/arith_yacc.c\n+@@ -98,8 +98,8 @@ static intmax_t do_binop(int op, intmax_t a, intmax_t b)\n+ \tdefault:\n+ \tcase ARITH_REM:\n+ \tcase ARITH_DIV:\n+-\t\tif (!b)\n+-\t\t\tyyerror(\"division by zero\");\n++\t\tif (!b || (a == INTMAX_MIN && b == -1))\n++\t\t\tyyerror(\"division error\");\n+ \t\treturn op == ARITH_REM ? a % b : a / b;\n+ \tcase ARITH_MUL:\n+ \t\treturn a * b;\n+-- \n+cgit 1.3-korg\n+\ndiff --git a/package/dash/dash.mk b/package/dash/dash.mk\nindex 0993cb99a6..a5455d8ea9 100644\n--- a/package/dash/dash.mk\n+++ b/package/dash/dash.mk\n@@ -13,6 +13,9 @@ DASH_AUTORECONF = YES\n \n DASH_CPE_ID_VENDOR = dash\n \n+# 0002-fix-CVE-2026-31323.patch\n+DASH_IGNORE_CVES += CVE-2026-31323\n+\n # dash does not build in parallel\n DASH_MAKE = $(MAKE1)\n \n","prefixes":["for","2025.02.x"]}