{"id":"CVE-2025-68740","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nima: Handle error code returned by ima_filter_rule_match()\n\nIn ima_match_rules(), if ima_filter_rule_match() returns -ENOENT due to\nthe rule being NULL, the function in…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nima: Handle error code returned by ima_filter_rule_match()\n\nIn ima_match_rules(), if ima_filter_rule_match() returns -ENOENT due to\nthe rule being NULL, the function in…","severity":"none","published":"2025-12-24","updated":"2026-09-29","sourceUpdated":"2026-09-29T19:10:00.160","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-68740","references":[{"url":"https://git.kernel.org/stable/c/32952c4f4d1b2deb30dce72ba109da808a9018e1","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/738c9738e690f5cea24a3ad6fd2d9a323cf614f6","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/88cd5fbf5869731be8fc6f7cecb4e0d6ab3d8749","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c2238d487a640ae3511e1b6f4640ab27ce10d7f6","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/cca3e7df3c0f99542033657ba850b9a6d27f8784","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d14e0ec6a6828ee0dffa163fb5d513c9a21f0a51","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/de4431faf308d0c533cb386f5fa9af009bc86158","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f2f4627b74c120fcdd8e1db93bc91f9bbaf46f85","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd"],"epss":0.00207,"epssPercentile":0.09667,"ingestedAt":"2026-09-29T19:44:04.087Z","slug":"CVE-2025-68740","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nima: Handle error code returned by ima_filter_rule_match()\n\nIn ima_match_rules(), if ima_filter_rule_match() returns -ENOENT due to\nthe rule being NULL, the function incorrectly skips the 'if (!rc)' check\nand sets 'result = true'. The LSM rule is considered a match, causing\nextra files to be measured by IMA.\n\nThis issue can be reproduced in the following scenario:\nAfter unloading the SELinux policy module via 'semodule -d', if an IMA\nmeasurement is triggered before ima_lsm_rules is updated,\nin ima_match_rules(), the first call to ima_filter_rule_match() returns\n-ESTALE. This causes the code to enter the 'if (rc == -ESTALE &&\n!rule_reinitialized)' block, perform ima_lsm_copy_rule() and retry. In\nima_lsm_copy_rule(), since the SELinux module has been removed, the rule\nbecomes NULL, and the second call to ima_filter_rule_match() returns\n-ENOENT. This bypasses the 'if (!rc)' check and results in a false match.\n\nCall trace:\n  selinux_audit_rule_match+0x310/0x3b8\n  security_audit_rule_match+0x60/0xa0\n  ima_match_rules+0x2e4/0x4a0\n  ima_match_policy+0x9c/0x1e8\n  ima_get_action+0x48/0x60\n  process_measurement+0xf8/0xa98\n  ima_bprm_check+0x98/0xd8\n  security_bprm_check+0x5c/0x78\n  search_binary_handler+0x6c/0x318\n  exec_binprm+0x58/0x1b8\n  bprm_execve+0xb8/0x130\n  do_execveat_common.isra.0+0x1a8/0x258\n  __arm64_sys_execve+0x48/0x68\n  invoke_syscall+0x50/0x128\n  el0_svc_common.constprop.0+0xc8/0xf0\n  do_el0_svc+0x24/0x38\n  el0_svc+0x44/0x200\n  el0t_64_sync_handler+0x100/0x130\n  el0t_64_sync+0x3c8/0x3d0\n\nFix this by changing 'if (!rc)' to 'if (rc <= 0)' to ensure that error\ncodes like -ENOENT do not bypass the check and accidentally result in a\nsuccessful match.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}