{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2025-38656", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T04:51:24.030Z", "datePublished": "2025-08-22T16:00:59.678Z", "dateUpdated": "2026-08-05T12:03:42.882Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:03:42.882Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: iwlwifi: Fix error code in iwl_op_mode_dvm_start()\n\nPreserve the error code if iwl_setup_deferred_work() fails. The current\ncode returns ERR_PTR(0) (which is NULL) on this path. I believe the\nmissing error code potentially leads to a use after free involving\ndebugfs." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The vulnerable code is only reachable through the iwlwifi driver's PCI probe / firmware-load callback and the `iwl_opmode_register()` path when the `iwldvm` module loads — local module-load or device-bind activity, not any network or wireless frame processing (the radio is not even up at this point).\nAC:L - Reaching the faulty branch requires `alloc_ordered_workqueue()` to fail with ENOMEM at one specific small allocation during a one-shot driver probe; an attacker can raise system-wide memory pressure but cannot influence the timing of a boot-time or hotplug probe, so success depends on conditions outside their control.\nPR:L - Driver probe is normally triggered by root (modprobe, sysfs bind/unbind) or by hotplug, but an unprivileged local user can supply the only other precondition — memory exhaustion — while a probe occurs, so basic local user privileges are assumed rather than full root.\nUI:N - No victim action beyond ordinary system operation is needed; the probe path executes automatically at boot, on module autoload, or on device hotplug.\nS:U - The freed objects and the stale debugfs dentry all live in the kernel's own security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The commit identifies a resulting use-after-free involving debugfs; `ieee80211_free_hw()` has already freed the `iwl_priv` allocation while `drv->dbgfs_op_mode` still references the orphaned tree, and a UAF on reclaimed slab memory can be leveraged to read attacker-chosen kernel data.\nI:H - The same use-after-free lets a reclaiming allocation overlap the freed object, giving a write primitive over kernel heap state that can be escalated to control-flow corruption.\nA:H - The driver is left in a half-torn-down state with a dangling debugfs reference, and dereferencing freed memory produces an oops/panic — a full availability loss, on top of the WiFi device being permanently unusable." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/wireless/intel/iwlwifi/dvm/main.c" ], "versions": [ { "version": "c0e43c3f6c0a79381b468574c241065998412b7c", "lessThan": "991e2066f6009d3cb898413058c62dbcc92bd6d2", "status": "affected", "versionType": "git" }, { "version": "70a1b527eaea9430b1bd87de59f3b9f6bd225701", "lessThan": "1d068272c21d886d06526454b68368100ba0a720", "status": "affected", "versionType": "git" }, { "version": "90a0d9f339960448a3acc1437a46730f975efd6a", "lessThan": "cf80c02a9fdb6c5bc8508beb6a0f6a1294fc32f6", "status": "affected", "versionType": "git" }, { "version": "c80832d445653baba5ac80cd2c2637c437ac881b", "status": "affected", "versionType": "git" }, { "version": "b398120fbe0acfef60b16f6a0f69902d385d7728", "status": "affected", "versionType": "git" }, { "version": "2e9f85ee3b46453a2f250a57d3a9f10c70c71202", "status": "affected", "versionType": "git" }, { "version": "6663c52608d8d8727bf1911e6d9218069ba1c85e", "status": "affected", "versionType": "git" }, { "version": "ca980f1911a7144d451d1c31298ab8507c6bd88f", "status": "affected", "versionType": "git" }, { "version": "7dd6350307af6521b6240b295c93b7eec4daebe6", "status": "affected", "versionType": "git" }, { "version": "5.4.297", "lessThan": "5.5", "status": "affected", "versionType": "semver" }, { "version": "5.10.241", "lessThan": "5.11", "status": "affected", "versionType": "semver" }, { "version": "5.15.190", "lessThan": "5.16", "status": "affected", "versionType": "semver" }, { "version": "6.1.148", "lessThan": "6.2", "status": "affected", "versionType": "semver" }, { "version": "6.6.102", "lessThan": "6.7", "status": "affected", "versionType": "semver" }, { "version": "6.12.42", "lessThan": "6.13", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/wireless/intel/iwlwifi/dvm/main.c" ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4.297" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10.241" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15.190" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1.148" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.102" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12.42" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/991e2066f6009d3cb898413058c62dbcc92bd6d2" }, { "url": "https://git.kernel.org/stable/c/1d068272c21d886d06526454b68368100ba0a720" }, { "url": "https://git.kernel.org/stable/c/cf80c02a9fdb6c5bc8508beb6a0f6a1294fc32f6" } ], "title": "wifi: iwlwifi: Fix error code in iwl_op_mode_dvm_start()", "x_generator": { "engine": "bippy-1.2.0" } } } }