{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-05-02T05:51:20.497","vulnerabilities":[{"cve":{"id":"CVE-2025-68183","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","published":"2025-12-16T14:15:50.880","lastModified":"2026-04-15T00:35:42.020","vulnStatus":"Deferred","cveTags":[],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nima: don't clear IMA_DIGSIG flag when setting or removing non-IMA xattr\n\nCurrently when both IMA and EVM are in fix mode, the IMA signature will\nbe reset to IMA hash if a program first stores IMA signature in\nsecurity.ima and then writes/removes some other security xattr for the\nfile.\n\nFor example, on Fedora, after booting the kernel with \"ima_appraise=fix\nevm=fix ima_policy=appraise_tcb\" and installing rpm-plugin-ima,\ninstalling/reinstalling a package will not make good reference IMA\nsignature generated. Instead IMA hash is generated,\n\n    # getfattr -m - -d -e hex /usr/bin/bash\n    # file: usr/bin/bash\n    security.ima=0x0404...\n\nThis happens because when setting security.selinux, the IMA_DIGSIG flag\nthat had been set early was cleared. As a result, IMA hash is generated\nwhen the file is closed.\n\nSimilarly, IMA signature can be cleared on file close after removing\nsecurity xattr like security.evm or setting/removing ACL.\n\nPrevent replacing the IMA file signature with a file hash, by preventing\nthe IMA_DIGSIG flag from being reset.\n\nHere's a minimal C reproducer which sets security.selinux as the last\nstep which can also replaced by removing security.evm or setting ACL,\n\n    #include <stdio.h>\n    #include <sys/xattr.h>\n    #include <fcntl.h>\n    #include <unistd.h>\n    #include <string.h>\n    #include <stdlib.h>\n\n    int main() {\n        const char* file_path = \"/usr/sbin/test_binary\";\n        const char* hex_string = \"030204d33204490066306402304\";\n        int length = strlen(hex_string);\n        char* ima_attr_value;\n        int fd;\n\n        fd = open(file_path, O_WRONLY|O_CREAT|O_EXCL, 0644);\n        if (fd == -1) {\n            perror(\"Error opening file\");\n            return 1;\n        }\n\n        ima_attr_value = (char*)malloc(length / 2 );\n        for (int i = 0, j = 0; i < length; i += 2, j++) {\n            sscanf(hex_string + i, \"%2hhx\", &ima_attr_value[j]);\n        }\n\n        if (fsetxattr(fd, \"security.ima\", ima_attr_value, length/2, 0) == -1) {\n            perror(\"Error setting extended attribute\");\n            close(fd);\n            return 1;\n        }\n\n        const char* selinux_value= \"system_u:object_r:bin_t:s0\";\n        if (fsetxattr(fd, \"security.selinux\", selinux_value, strlen(selinux_value), 0) == -1) {\n            perror(\"Error setting extended attribute\");\n            close(fd);\n            return 1;\n        }\n\n        close(fd);\n\n        return 0;\n    }"}],"metrics":{},"references":[{"url":"https://git.kernel.org/stable/c/02aa671c08a4834bef5166743a7b88686fbfa023","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/88b4cbcf6b041ae0f2fc8a34554a5b6a83a2b7cd","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d2993a7e98eb70c737c6f5365a190e79c72b8407","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/edd824eb45e4f7e05ad3ab090dab6dbdb79cd292","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}]}}]}