{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-68183","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-12-16T13:41:40.252Z","datePublished":"2025-12-16T13:43:01.178Z","dateUpdated":"2026-05-11T21:48:15.966Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T21:48:15.966Z"},"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    }"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["security/integrity/ima/ima_appraise.c"],"versions":[{"version":"e3ccfe1ad7d895487977ef64eda3441d16c9851a","lessThan":"d2993a7e98eb70c737c6f5365a190e79c72b8407","status":"affected","versionType":"git"},{"version":"e3ccfe1ad7d895487977ef64eda3441d16c9851a","lessThan":"edd824eb45e4f7e05ad3ab090dab6dbdb79cd292","status":"affected","versionType":"git"},{"version":"e3ccfe1ad7d895487977ef64eda3441d16c9851a","lessThan":"02aa671c08a4834bef5166743a7b88686fbfa023","status":"affected","versionType":"git"},{"version":"e3ccfe1ad7d895487977ef64eda3441d16c9851a","lessThan":"88b4cbcf6b041ae0f2fc8a34554a5b6a83a2b7cd","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["security/integrity/ima/ima_appraise.c"],"versions":[{"version":"5.14","status":"affected"},{"version":"0","lessThan":"5.14","status":"unaffected","versionType":"semver"},{"version":"6.6.117","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.58","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.17.8","lessThanOrEqual":"6.17.*","status":"unaffected","versionType":"semver"},{"version":"6.18","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.14","versionEndExcluding":"6.6.117"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.14","versionEndExcluding":"6.12.58"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.14","versionEndExcluding":"6.17.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.14","versionEndExcluding":"6.18"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/d2993a7e98eb70c737c6f5365a190e79c72b8407"},{"url":"https://git.kernel.org/stable/c/edd824eb45e4f7e05ad3ab090dab6dbdb79cd292"},{"url":"https://git.kernel.org/stable/c/02aa671c08a4834bef5166743a7b88686fbfa023"},{"url":"https://git.kernel.org/stable/c/88b4cbcf6b041ae0f2fc8a34554a5b6a83a2b7cd"}],"title":"ima: don't clear IMA_DIGSIG flag when setting or removing non-IMA xattr","x_generator":{"engine":"bippy-1.2.0"}}}}