{"id":"CVE-2025-40253","title":"s390/ctcm: Fix double-kfree","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ns390/ctcm: Fix double-kfree\n\nThe function 'mpc_rcvd_sweep_req(mpcginfo)' is called conditionally\nfrom function 'ctcmpc_unpack_skb'. It frees passed mpcginfo.\nAfter that…","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= 467ddbbe7e749d558f13e640f50f546149c930b3 < 06f1dd1de0d33dbfbd2e1fc9fc57d8895f730de2","Linux >= 4d3c6d741816539b57fa1110c3f765a8c176d7b4 < 6bf8ccaabce8cebb6cb1f255c93d0acdfe95c17a","Linux >= 2bd57101c3ecf3f8c0da1d26c2b6ad511adc6d50 < 7616e2eee679746d526c7f5befd4eedb995935b5","Linux >= 0c0b20587b9f25a2ad14db7f80ebe49bdf29920a < 43096dab8cc60fc39133205fd149a54d3acebea8","Linux >= 0c0b20587b9f25a2ad14db7f80ebe49bdf29920a < 3b177b2ded563df16f6d5920671ffcfe5915d472","Linux >= 0c0b20587b9f25a2ad14db7f80ebe49bdf29920a < b9dbfb1b5699f9f1e4991f96741bdf9047147589","Linux >= 0c0b20587b9f25a2ad14db7f80ebe49bdf29920a < 7ff76f8dc6b550f8d16487bf3cebc278be720b5c","Linux >= 0c0b20587b9f25a2ad14db7f80ebe49bdf29920a < da02a1824884d6c84c5e5b5ac373b0c9e3288ec2","Linux 36933de59f67029e5739a98393891f9b94f27e0f","Linux d886b4292a1c5b4facdb2dfdc31f0fecc71df898","Linux 4c9ba0fed125deba8416b995b0c274b0804c0c24","Linux ea0053af5dab4d63a9c44563973fb2f3bfd9eb2b","Linux >= 5.4.195 < 5.4.302","Linux >= 5.10.117 < 5.10.247","Linux >= 5.15.41 < 5.15.197","Linux >= 4.9.315 < 4.10","Linux >= 4.14.280 < 4.15","Linux >= 4.19.244 < 4.20","Linux >= 5.17.9 < 5.18","Linux 5.18"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-15T21:58:29.186367Z"},"published":"2025-12-04","updated":"2026-10-15","sourceUpdated":"2026-10-15T22:02:41.932Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-40253","references":[{"url":"https://git.kernel.org/stable/c/06f1dd1de0d33dbfbd2e1fc9fc57d8895f730de2"},{"url":"https://git.kernel.org/stable/c/6bf8ccaabce8cebb6cb1f255c93d0acdfe95c17a"},{"url":"https://git.kernel.org/stable/c/7616e2eee679746d526c7f5befd4eedb995935b5"},{"url":"https://git.kernel.org/stable/c/43096dab8cc60fc39133205fd149a54d3acebea8"},{"url":"https://git.kernel.org/stable/c/3b177b2ded563df16f6d5920671ffcfe5915d472"},{"url":"https://git.kernel.org/stable/c/b9dbfb1b5699f9f1e4991f96741bdf9047147589"},{"url":"https://git.kernel.org/stable/c/7ff76f8dc6b550f8d16487bf3cebc278be720b5c"},{"url":"https://git.kernel.org/stable/c/da02a1824884d6c84c5e5b5ac373b0c9e3288ec2"}],"tags":["cve.org"],"epss":0.003,"epssPercentile":0.21141,"ingestedAt":"2026-10-15T22:48:25.553Z","slug":"CVE-2025-40253","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ns390/ctcm: Fix double-kfree\n\nThe function 'mpc_rcvd_sweep_req(mpcginfo)' is called conditionally\nfrom function 'ctcmpc_unpack_skb'. It frees passed mpcginfo.\nAfter that a call to function 'kfree' in function 'ctcmpc_unpack_skb'\nfrees it again.\n\nRemove 'kfree' call in function 'mpc_rcvd_sweep_req(mpcginfo)'.\n\nBug detected by the clang static analyzer.\n\n## Affected\n\n- `Linux >= 467ddbbe7e749d558f13e640f50f546149c930b3 < 06f1dd1de0d33dbfbd2e1fc9fc57d8895f730de2`\n- `Linux >= 4d3c6d741816539b57fa1110c3f765a8c176d7b4 < 6bf8ccaabce8cebb6cb1f255c93d0acdfe95c17a`\n- `Linux >= 2bd57101c3ecf3f8c0da1d26c2b6ad511adc6d50 < 7616e2eee679746d526c7f5befd4eedb995935b5`\n- `Linux >= 0c0b20587b9f25a2ad14db7f80ebe49bdf29920a < 43096dab8cc60fc39133205fd149a54d3acebea8`\n- `Linux >= 0c0b20587b9f25a2ad14db7f80ebe49bdf29920a < 3b177b2ded563df16f6d5920671ffcfe5915d472`\n- `Linux >= 0c0b20587b9f25a2ad14db7f80ebe49bdf29920a < b9dbfb1b5699f9f1e4991f96741bdf9047147589`\n- `Linux >= 0c0b20587b9f25a2ad14db7f80ebe49bdf29920a < 7ff76f8dc6b550f8d16487bf3cebc278be720b5c`\n- `Linux >= 0c0b20587b9f25a2ad14db7f80ebe49bdf29920a < da02a1824884d6c84c5e5b5ac373b0c9e3288ec2`\n- `Linux 36933de59f67029e5739a98393891f9b94f27e0f`\n- `Linux d886b4292a1c5b4facdb2dfdc31f0fecc71df898`\n- `Linux 4c9ba0fed125deba8416b995b0c274b0804c0c24`\n- `Linux ea0053af5dab4d63a9c44563973fb2f3bfd9eb2b`\n- `Linux >= 5.4.195 < 5.4.302`\n- `Linux >= 5.10.117 < 5.10.247`\n- `Linux >= 5.15.41 < 5.15.197`\n- `Linux >= 4.9.315 < 4.10`\n- `Linux >= 4.14.280 < 4.15`\n- `Linux >= 4.19.244 < 4.20`\n- `Linux >= 5.17.9 < 5.18`\n- `Linux 5.18`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}