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Merge pull request #28250 from satyam102006:fix/stackblur-overflow-28233

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imgproc: fix heap-buffer-overflow in stackBlur #28233 #28250

### Summary
Fixes a heap-buffer-overflow in `cv::stackBlur` when the kernel size is larger than the image dimensions 
### Changes
* Added input validation to clamp the kernel size to the image dimensions.
* Added a regression test (`regression_28233`) covering 1x1 and small image cases.

Fixes #28233
This commit is contained in:
satyam yadav
2025-12-22 13:52:12 +05:30
committed by GitHub
parent a66443fdc2
commit 15fe69b5af
3 changed files with 23 additions and 4 deletions
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modules/imgproc/test/test_stackblur.cpp
+13
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@@ -311,5 +311,18 @@ TEST_P(StackBlur_GaussianBlur, compare)
}
INSTANTIATE_TEST_CASE_P(Imgproc, StackBlur_GaussianBlur, testing::Values(CV_8U, CV_16S, CV_16U, CV_32F));
TEST(Imgproc_StackBlur, regression_28233)
{
Mat src1(1, 1, CV_8UC1, Scalar(123));
Mat dst1;
EXPECT_NO_THROW(stackBlur(src1, dst1, Size(9, 1)));
EXPECT_EQ(dst1.at<uchar>(0, 0), 123);
Mat src2(3, 3, CV_8UC1, Scalar(50));
Mat dst2;
EXPECT_NO_THROW(stackBlur(src2, dst2, Size(11, 11)));
EXPECT_EQ(dst2.at<uchar>(1, 1), 50);
}
}
}