From: Peter Marko <[email protected]> Pick patch per [1].
[1] https://security-tracker.debian.org/tracker/CVE-2026-76956 Signed-off-by: Peter Marko <[email protected]> --- .../expat/expat/CVE-2026-76956.patch | 26 +++++++++++++++++++ meta/recipes-core/expat/expat_2.8.3.bb | 1 + 2 files changed, 27 insertions(+) create mode 100644 meta/recipes-core/expat/expat/CVE-2026-76956.patch diff --git a/meta/recipes-core/expat/expat/CVE-2026-76956.patch b/meta/recipes-core/expat/expat/CVE-2026-76956.patch new file mode 100644 index 00000000000..96d9b68ee7c --- /dev/null +++ b/meta/recipes-core/expat/expat/CVE-2026-76956.patch @@ -0,0 +1,26 @@ +From 40daa9996d616e66a75dea41ed2b18f2c3901b9f Mon Sep 17 00:00:00 2001 +From: Sorrachat <[email protected]> +Date: Fri, 14 Aug 2026 17:29:50 -0400 +Subject: [PATCH] lib: Fix inverted getentropy() return in + writeRandomBytes_getentropy + +CVE: CVE-2026-76956 +Upstream-Status: Backport [https://github.com/libexpat/libexpat/commit/40daa9996d616e66a75dea41ed2b18f2c3901b9f] +Signed-off-by: Peter Marko <[email protected]> +--- + lib/random_getentropy.c | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +diff --git a/lib/random_getentropy.c b/expat/lib/random_getentropy.c +index d258df6a..ad8b1984 100644 +--- a/lib/random_getentropy.c ++++ b/lib/random_getentropy.c +@@ -54,7 +54,7 @@ + bool + writeRandomBytes_getentropy(void *target, size_t count) { + errno = 0; +- const bool success = getentropy(target, count); ++ const bool success = (getentropy(target, count) == 0); + // MSan does not understand `getentropy`, so explain its effects + if (success) + MSAN_UNPOISON(target, count); diff --git a/meta/recipes-core/expat/expat_2.8.3.bb b/meta/recipes-core/expat/expat_2.8.3.bb index 5d30a844fa0..c3c9f738453 100644 --- a/meta/recipes-core/expat/expat_2.8.3.bb +++ b/meta/recipes-core/expat/expat_2.8.3.bb @@ -13,6 +13,7 @@ SRC_URI = "${GITHUB_BASE_URI}/download/R_${VERSION_TAG}/expat-${PV}.tar.bz2 \ file://CVE-2026-66046-01.patch \ file://CVE-2026-66046-02.patch \ file://CVE-2026-76641.patch \ + file://CVE-2026-76956.patch \ " GITHUB_BASE_URI = "https://github.com/libexpat/libexpat/releases/";
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