From 033f224986c46c111fd3cff4ce4a25b1875b39c3 Mon Sep 17 00:00:00 2001 From: Praveen Kumar Date: Fri, 26 Sep 2025 12:41:06 +0530 Subject: [PATCH] polkit: fix CVE-2025-7519 A flaw was found in polkit. When processing an XML policy with 32 or more nested elements in depth, an out-of-bounds write can be triggered. This issue can lead to a crash or other unexpected behavior, and arbitrary code execution is not discarded. To exploit this flaw, a high-privilege account is needed as it's required to place the malicious policy file properly. Reference: https://nvd.nist.gov/vuln/detail/CVE-2025-7519 Upstream-patch: https://github.com/polkit-org/polkit/commit/107d3801361b9f9084f78710178e683391f1d245 Signed-off-by: Praveen Kumar Signed-off-by: Gyorgy Sarvari --- .../polkit/files/CVE-2025-7519.patch | 34 +++++++++++++++++++ .../recipes-extended/polkit/polkit_0.119.bb | 1 + 2 files changed, 35 insertions(+) create mode 100644 meta-oe/recipes-extended/polkit/files/CVE-2025-7519.patch diff --git a/meta-oe/recipes-extended/polkit/files/CVE-2025-7519.patch b/meta-oe/recipes-extended/polkit/files/CVE-2025-7519.patch new file mode 100644 index 0000000000..78945a88fc --- /dev/null +++ b/meta-oe/recipes-extended/polkit/files/CVE-2025-7519.patch @@ -0,0 +1,34 @@ +From 107d3801361b9f9084f78710178e683391f1d245 Mon Sep 17 00:00:00 2001 +From: Jan Rybar +Date: Fri, 6 Jun 2025 13:25:55 +0200 +Subject: [PATCH] Nested .policy files cause xml parsing overflow leading to + crash + +CVE: CVE-2025-7519 + +Upstream-Status: Backport [https://github.com/polkit-org/polkit/commit/107d3801361b9f9084f78710178e683391f1d245] + +Signed-off-by: Praveen Kumar +--- + src/polkitbackend/polkitbackendactionpool.c | 6 ++++++ + 1 file changed, 6 insertions(+) + +diff --git a/src/polkitbackend/polkitbackendactionpool.c b/src/polkitbackend/polkitbackendactionpool.c +index 43f89cb..f4acca9 100644 +--- a/src/polkitbackend/polkitbackendactionpool.c ++++ b/src/polkitbackend/polkitbackendactionpool.c +@@ -739,6 +739,12 @@ _start (void *data, const char *el, const char **attr) + guint num_attr; + ParserData *pd = data; + ++ if (pd->stack_depth < 0 || pd->stack_depth >= PARSER_MAX_DEPTH) ++ { ++ g_warning ("XML parsing reached max depth?"); ++ goto error; ++ } ++ + for (num_attr = 0; attr[num_attr] != NULL; num_attr++) + ; + +-- +2.40.0 diff --git a/meta-oe/recipes-extended/polkit/polkit_0.119.bb b/meta-oe/recipes-extended/polkit/polkit_0.119.bb index eff80cd43d..6f39af9d78 100644 --- a/meta-oe/recipes-extended/polkit/polkit_0.119.bb +++ b/meta-oe/recipes-extended/polkit/polkit_0.119.bb @@ -28,6 +28,7 @@ SRC_URI = "http://www.freedesktop.org/software/polkit/releases/polkit-${PV}.tar. file://0002-CVE-2021-4115-GHSL-2021-077-fix.patch \ file://0003-Added-support-for-duktape-as-JS-engine.patch \ file://0004-Make-netgroup-support-optional.patch \ + file://CVE-2025-7519.patch \ " SRC_URI[sha256sum] = "c8579fdb86e94295404211285fee0722ad04893f0213e571bd75c00972fd1f5c"