{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2025-68740",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2025-68740"
  ],
  "published": "2025-12-24T12:10:34Z",
  "summary": "ima: Handle error code returned by ima_filter_rule_match()",
  "details": "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 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.",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.160",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-68740"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/d14e0ec6a6828ee0dffa163fb5d513c9a21f0a51"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f2f4627b74c120fcdd8e1db93bc91f9bbaf46f85"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/88cd5fbf5869731be8fc6f7cecb4e0d6ab3d8749"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/cca3e7df3c0f99542033657ba850b9a6d27f8784"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c2238d487a640ae3511e1b6f4640ab27ce10d7f6"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/de4431faf308d0c533cb386f5fa9af009bc86158"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/32952c4f4d1b2deb30dce72ba109da808a9018e1"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/738c9738e690f5cea24a3ad6fd2d9a323cf614f6"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-12T04:54:46Z"
  }
}