CVE-2025-40253

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-40253", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T07:20:57.181Z", "datePublished": "2025-12-04T16:08:15.340Z", "dateUpdated": "2026-10-15T22:02:41.932Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:08:55.944Z"}, "descriptions": [{"lang": "en", "value": "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 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."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:A - The malicious `TH_SWEEP_REQ` transmission header is delivered as a link-level MPC frame by the directly-attached CTC peer (a partner LPAR or a z/VM guest coupled via virtual CTCA), reaching `ctcmpc_unpack_skb()` straight from the channel read interrupt. MPC TH headers are regenerated per link and not routable, so the attacker must sit on the adjacent channel connection rather than across a routed network.\nAC:L - A single frame with `th_ch_flag = 0xfe` deterministically drives `ctcmpc_unpack_skb()` into `mpc_rcvd_sweep_req()` and the two consecutive `kfree()` calls every time \u2014 no race, no timing window, and no memory-layout precondition outside the attacker's control.\nPR:N - The attacker needs no account, credential, or capability on the target Linux image; it only has to be the CTC peer, and the path is reachable both in `MPCG_STATE_READY` and during the pre-establishment XID-negotiation states, where no authentication of any kind has occurred.\nUI:N - The remote peer triggers the double free entirely on its own by transmitting one frame on an already-active CTC link; no administrator or user action on the victim system is needed at attack time.\nS:U - The slab corruption occurs in the receiving kernel's own softirq/tasklet context and its consequences stay within that kernel's security authority; no hypervisor, IOMMU, or sandbox boundary is crossed.\nC:H - On kernels without freelist hardening the double free leaves the kmalloc-64 percpu freelist self-referential, so repeated allocations hand the same 40-byte object to unrelated kernel structures, yielding an aliasing/use-after-free primitive that exposes arbitrary kernel memory contents to the attacker-controlled objects.\nI:H - The same freelist corruption lets attacker-influenced allocations overlap live kernel objects (type confusion), giving a write primitive over adjacent/aliased kernel data and a realistic path to control-flow hijack \u2014 classic exploitable heap corruption, not a mere accounting error.\nA:H - With `CONFIG_SLAB_FREELIST_HARDENED` the immediate double free hits `BUG_ON(object == fp)` in `set_freepointer()` inside a tasklet, which is fatal in interrupt context; without it the corrupted freelist causes near-certain crashes, and either outcome is re-triggerable at will by the peer."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/s390/net/ctcm_mpc.c"], "versions": [{"version": "467ddbbe7e749d558f13e640f50f546149c930b3", "lessThan": "06f1dd1de0d33dbfbd2e1fc9fc57d8895f730de2", "status": "affected", "versionType": "git"}, {"version": "4d3c6d741816539b57fa1110c3f765a8c176d7b4", "lessThan": "6bf8ccaabce8cebb6cb1f255c93d0acdfe95c17a", "status": "affected", "versionType": "git"}, {"version": "2bd57101c3ecf3f8c0da1d26c2b6ad511adc6d50", "lessThan": "7616e2eee679746d526c7f5befd4eedb995935b5", "status": "affected", "versionType": "git"}, {"version": "0c0b20587b9f25a2ad14db7f80ebe49bdf29920a", "lessThan": "43096dab8cc60fc39133205fd149a54d3acebea8", "status": "affected", "versionType": "git"}, {"version": "0c0b20587b9f25a2ad14db7f80ebe49bdf29920a", "lessThan": "3b177b2ded563df16f6d5920671ffcfe5915d472", "status": "affected", "versionType": "git"}, {"version": "0c0b20587b9f25a2ad14db7f80ebe49bdf29920a", "lessThan": "b9dbfb1b5699f9f1e4991f96741bdf9047147589", "status": "affected", "versionType": "git"}, {"version": "0c0b20587b9f25a2ad14db7f80ebe49bdf29920a", "lessThan": "7ff76f8dc6b550f8d16487bf3cebc278be720b5c", "status": "affected", "versionType": "git"}, {"version": "0c0b20587b9f25a2ad14db7f80ebe49bdf29920a", "lessThan": "da02a1824884d6c84c5e5b5ac373b0c9e3288ec2", "status": "affected", "versionType": "git"}, {"version": "36933de59f67029e5739a98393891f9b94f27e0f", "status": "affected", "versionType": "git"}, {"version": "d886b4292a1c5b4facdb2dfdc31f0fecc71df898", "status": "affected", "versionType": "git"}, {"version": "4c9ba0fed125deba8416b995b0c274b0804c0c24", "status": "affected", "versionType": "git"}, {"version": "ea0053af5dab4d63a9c44563973fb2f3bfd9eb2b", "status": "affected", "versionType": "git"}, {"version": "5.4.195", "lessThan": "5.4.302", "status": "affected", "versionType": "semver"}, {"version": "5.10.117", "lessThan": "5.10.247", "status": "affected", "versionType": "semver"}, {"version": "5.15.41", "lessThan": "5.15.197", "status": "affected", "versionType": "semver"}, {"version": "4.9.315", "lessThan": "4.10", "status": "affected", "versionType": "semver"}, {"version": "4.14.280", "lessThan": "4.15", "status": "affected", "versionType": "semver"}, {"version": "4.19.244", "lessThan": "4.20", "status": "affected", "versionType": "semver"}, {"version": "5.17.9", "lessThan": "5.18", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/s390/net/ctcm_mpc.c"], "versions": [{"version": "5.18", "status": "affected"}, {"version": "0", "lessThan": "5.18", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.302", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.247", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.197", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.159", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.118", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.60", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.17.10", "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": "5.4.195", "versionEndExcluding": "5.4.302"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10.117", "versionEndExcluding": "5.10.247"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15.41", "versionEndExcluding": "5.15.197"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.1.159"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.6.118"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.12.60"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.17.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.18"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9.315"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14.280"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19.244"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17.9"}]}]}], "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"}], "title": "s390/ctcm: Fix double-kfree", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2025-40253", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-15T21:58:29.186367Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-15T22:02:41.932Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2025-40253", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-15T21:58:29.186367Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-15T21:58:30.319Z"}}], "cna": {"title": "s390/ctcm: Fix double-kfree", "metrics": [{"cvssV3_1": {"version": "3.1", "baseScore": 8.8, "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}, "scenarios": [{"lang": "en", "value": "AV:A - The malicious `TH_SWEEP_REQ` transmission header is delivered as a link-level MPC frame by the directly-attached CTC peer (a partner LPAR or a z/VM guest coupled via virtual CTCA), reaching `ctcmpc_unpack_skb()` straight from the channel read interrupt. MPC TH headers are regenerated per link and not routable, so the attacker must sit on the adjacent channel connection rather than across a routed network.\nAC:L - A single frame with `th_ch_flag = 0xfe` deterministically drives `ctcmpc_unpack_skb()` into `mpc_rcvd_sweep_req()` and the two consecutive `kfree()` calls every time \u2014 no race, no timing window, and no memory-layout precondition outside the attacker's control.\nPR:N - The attacker needs no account, credential, or capability on the target Linux image; it only has to be the CTC peer, and the path is reachable both in `MPCG_STATE_READY` and during the pre-establishment XID-negotiation states, where no authentication of any kind has occurred.\nUI:N - The remote peer triggers the double free entirely on its own by transmitting one frame on an already-active CTC link; no administrator or user action on the victim system is needed at attack time.\nS:U - The slab corruption occurs in the receiving kernel's own softirq/tasklet context and its consequences stay within that kernel's security authority; no hypervisor, IOMMU, or sandbox boundary is crossed.\nC:H - On kernels without freelist hardening the double free leaves the kmalloc-64 percpu freelist self-referential, so repeated allocations hand the same 40-byte object to unrelated kernel structures, yielding an aliasing/use-after-free primitive that exposes arbitrary kernel memory contents to the attacker-controlled objects.\nI:H - The same freelist corruption lets attacker-influenced allocations overlap live kernel objects (type confusion), giving a write primitive over adjacent/aliased kernel data and a realistic path to control-flow hijack \u2014 classic exploitable heap corruption, not a mere accounting error.\nA:H - With `CONFIG_SLAB_FREELIST_HARDENED` the immediate double free hits `BUG_ON(object == fp)` in `set_freepointer()` inside a tasklet, which is fatal in interrupt context; without it the corrupted freelist causes near-certain crashes, and either outcome is re-triggerable at will by the peer."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "467ddbbe7e749d558f13e640f50f546149c930b3", "lessThan": "06f1dd1de0d33dbfbd2e1fc9fc57d8895f730de2", "versionType": "git"}, {"status": "affected", "version": "4d3c6d741816539b57fa1110c3f765a8c176d7b4", "lessThan": "6bf8ccaabce8cebb6cb1f255c93d0acdfe95c17a", "versionType": "git"}, {"status": "affected", "version": "2bd57101c3ecf3f8c0da1d26c2b6ad511adc6d50", "lessThan": "7616e2eee679746d526c7f5befd4eedb995935b5", "versionType": "git"}, {"status": "affected", "version": "0c0b20587b9f25a2ad14db7f80ebe49bdf29920a", "lessThan": "43096dab8cc60fc39133205fd149a54d3acebea8", "versionType": "git"}, {"status": "affected", "version": "0c0b20587b9f25a2ad14db7f80ebe49bdf29920a", "lessThan": "3b177b2ded563df16f6d5920671ffcfe5915d472", "versionType": "git"}, {"status": "affected", "version": "0c0b20587b9f25a2ad14db7f80ebe49bdf29920a", "lessThan": "b9dbfb1b5699f9f1e4991f96741bdf9047147589", "versionType": "git"}, {"status": "affected", "version": "0c0b20587b9f25a2ad14db7f80ebe49bdf29920a", "lessThan": "7ff76f8dc6b550f8d16487bf3cebc278be720b5c", "versionType": "git"}, {"status": "affected", "version": "0c0b20587b9f25a2ad14db7f80ebe49bdf29920a", "lessThan": "da02a1824884d6c84c5e5b5ac373b0c9e3288ec2", "versionType": "git"}, {"status": "affected", "version": "36933de59f67029e5739a98393891f9b94f27e0f", "versionType": "git"}, {"status": "affected", "version": "d886b4292a1c5b4facdb2dfdc31f0fecc71df898", "versionType": "git"}, {"status": "affected", "version": "4c9ba0fed125deba8416b995b0c274b0804c0c24", "versionType": "git"}, {"status": "affected", "version": "ea0053af5dab4d63a9c44563973fb2f3bfd9eb2b", "versionType": "git"}, {"status": "affected", "version": "5.4.195", "lessThan": "5.4.302", "versionType": "semver"}, {"status": "affected", "version": "5.10.117", "lessThan": "5.10.247", "versionType": "semver"}, {"status": "affected", "version": "5.15.41", "lessThan": "5.15.197", "versionType": "semver"}, {"status": "affected", "version": "4.9.315", "lessThan": "4.10", "versionType": "semver"}, {"status": "affected", "version": "4.14.280", "lessThan": "4.15", "versionType": "semver"}, {"status": "affected", "version": "4.19.244", "lessThan": "4.20", "versionType": "semver"}, {"status": "affected", "version": "5.17.9", "lessThan": "5.18", "versionType": "semver"}], "programFiles": ["drivers/s390/net/ctcm_mpc.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.18"}, {"status": "unaffected", "version": "0", "lessThan": "5.18", "versionType": "semver"}, {"status": "unaffected", "version": "5.4.302", "versionType": "semver", "lessThanOrEqual": "5.4.*"}, {"status": "unaffected", "version": "5.10.247", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.197", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.159", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.118", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.60", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.17.10", "versionType": "semver", "lessThanOrEqual": "6.17.*"}, {"status": "unaffected", "version": "6.18", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/s390/net/ctcm_mpc.c"], "defaultStatus": "affected"}], "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"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "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 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."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.4.302", "versionStartIncluding": "5.4.195"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.247", "versionStartIncluding": "5.10.117"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.197", "versionStartIncluding": "5.15.41"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.159", "versionStartIncluding": "5.18"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.118", "versionStartIncluding": "5.18"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.60", "versionStartIncluding": "5.18"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.17.10", "versionStartIncluding": "5.18"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18", "versionStartIncluding": "5.18"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "4.9.315"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "4.14.280"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "4.19.244"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "5.17.9"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:08:55.944Z"}}}, "cveMetadata": {"cveId": "CVE-2025-40253", "state": "PUBLISHED", "dateUpdated": "2026-10-15T22:02:41.932Z", "dateReserved": "2025-04-16T07:20:57.181Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2025-12-04T16:08:15.340Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/s390/net/ctcm_mpc.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "06f1dd1de0d33dbfbd2e1fc9fc57d8895f730de2", "status": "affected", "version": "467ddbbe7e749d558f13e640f50f546149c930b3", "versionType": "git"}, {"lessThan": "6bf8ccaabce8cebb6cb1f255c93d0acdfe95c17a", "status": "affected", "version": "4d3c6d741816539b57fa1110c3f765a8c176d7b4", "versionType": "git"}, {"lessThan": "7616e2eee679746d526c7f5befd4eedb995935b5", "status": "affected", "version": "2bd57101c3ecf3f8c0da1d26c2b6ad511adc6d50", "versionType": "git"}, {"lessThan": "43096dab8cc60fc39133205fd149a54d3acebea8", "status": "affected", "version": "0c0b20587b9f25a2ad14db7f80ebe49bdf29920a", "versionType": "git"}, {"lessThan": "3b177b2ded563df16f6d5920671ffcfe5915d472", "status": "affected", "version": "0c0b20587b9f25a2ad14db7f80ebe49bdf29920a", "versionType": "git"}, {"lessThan": "b9dbfb1b5699f9f1e4991f96741bdf9047147589", "status": "affected", "version": "0c0b20587b9f25a2ad14db7f80ebe49bdf29920a", "versionType": "git"}, {"lessThan": "7ff76f8dc6b550f8d16487bf3cebc278be720b5c", "status": "affected", "version": "0c0b20587b9f25a2ad14db7f80ebe49bdf29920a", "versionType": "git"}, {"lessThan": "da02a1824884d6c84c5e5b5ac373b0c9e3288ec2", "status": "affected", "version": "0c0b20587b9f25a2ad14db7f80ebe49bdf29920a", "versionType": "git"}, {"status": "affected", "version": "36933de59f67029e5739a98393891f9b94f27e0f", "versionType": "git"}, {"status": "affected", "version": "d886b4292a1c5b4facdb2dfdc31f0fecc71df898", "versionType": "git"}, {"status": "affected", "version": "4c9ba0fed125deba8416b995b0c274b0804c0c24", "versionType": "git"}, {"status": "affected", "version": "ea0053af5dab4d63a9c44563973fb2f3bfd9eb2b", "versionType": "git"}, {"lessThan": "5.4.302", "status": "affected", "version": "5.4.195", "versionType": "semver"}, {"lessThan": "5.10.247", "status": "affected", "version": "5.10.117", "versionType": "semver"}, {"lessThan": "5.15.197", "status": "affected", "version": "5.15.41", "versionType": "semver"}, {"lessThan": "4.10", "status": "affected", "version": "4.9.315", "versionType": "semver"}, {"lessThan": "4.15", "status": "affected", "version": "4.14.280", "versionType": "semver"}, {"lessThan": "4.20", "status": "affected", "version": "4.19.244", "versionType": "semver"}, {"lessThan": "5.18", "status": "affected", "version": "5.17.9", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/s390/net/ctcm_mpc.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.18"}, {"lessThan": "5.18", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.4.*", "status": "unaffected", "version": "5.4.302", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.247", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.197", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.159", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.118", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.60", "versionType": "semver"}, {"lessThanOrEqual": "6.17.*", "status": "unaffected", "version": "6.17.10", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.18", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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 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."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ns390/ctcm: Correcci\u00f3n de doble kfree\n\nLa funci\u00f3n 'mpc_rcvd_sweep_req(mpcginfo)' es llamada condicionalmente desde la funci\u00f3n 'ctcmpc_unpack_skb'. Libera el mpcginfo pasado. Despu\u00e9s de eso, una llamada a la funci\u00f3n 'kfree' en la funci\u00f3n 'ctcmpc_unpack_skb' lo libera de nuevo.\n\nEliminar la llamada a 'kfree' en la funci\u00f3n 'mpc_rcvd_sweep_req(mpcginfo)'.\n\nError detectado por el analizador est\u00e1tico de clang."}], "id": "CVE-2025-40253", "lastModified": "2026-10-19T19:10:00.130", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-40253", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-15T21:58:29.186367Z", "version": "2.0.3"}}]}, "published": "2025-12-04T16:16:18.937", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/06f1dd1de0d33dbfbd2e1fc9fc57d8895f730de2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3b177b2ded563df16f6d5920671ffcfe5915d472"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/43096dab8cc60fc39133205fd149a54d3acebea8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6bf8ccaabce8cebb6cb1f255c93d0acdfe95c17a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7616e2eee679746d526c7f5befd4eedb995935b5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7ff76f8dc6b550f8d16487bf3cebc278be720b5c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b9dbfb1b5699f9f1e4991f96741bdf9047147589"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/da02a1824884d6c84c5e5b5ac373b0c9e3288ec2"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Deferred"}

{"bugzilla": {"description": "kernel: s390/ctcm: Fix double-kfree", "id": "2418871", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2418871"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\ns390/ctcm: Fix double-kfree\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.\nRemove 'kfree' call in function 'mpc_rcvd_sweep_req(mpcginfo)'.\nBug detected by the clang static analyzer."], "name": "CVE-2025-40253", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-12-04T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-40253\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-40253\nhttps://lore.kernel.org/linux-cve-announce/2025120431-CVE-2025-40253-e855@gregkh/T"], "threat_severity": "Low"}

{}