CVE-2024-36940

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There is no remote or adjacent protocol handler involved.\nAC:L - The failing condition in `pinctrl_claim_hogs()` includes `-ENOMEM` from `create_pinctrl()`'s `kzalloc()` and from `pinctrl_dt_to_map()`, which a local attacker can drive via sustained memory pressure timed against a driver probe. Once the free happens the devres release is guaranteed to run on the dangling pointer, so no unwinnable race is required.\nPR:L - An unprivileged local account suffices to apply the allocation pressure that induces the `pinctrl_claim_hogs()` error path on a system where an affected pinctrl driver probes or re-probes. No capability check guards `pinctrl_enable()` itself, and the resulting double free is in shared kernel slab state.\nUI:N - The vulnerable path executes autonomously during driver probe and devres teardown; no victim action such as mounting a filesystem or opening a file is needed.\nS:U - The corruption is confined to kernel slab memory within the same security authority \u2014 a standard kernel-level compromise with no crossing of a VM, IOMMU, or sandbox boundary.\nC:H - `pinctrl_unregister()` reads extensively through the freed `pctldev` (`->mutex`, `->node`, `->desc->pins`, `->p`), and if the slab object is reclaimed by attacker-groomed data the double free enables heap-layout manipulation that can be leveraged into arbitrary kernel memory disclosure.\nI:H - The stale `list_del(&pctldev->node)` writes through `next`/`prev` pointers in freed \u2014 and potentially attacker-controlled \u2014 memory, giving a write-what-where primitive, while the second `kfree()` corrupts the slab freelist and permits overlapping-allocation attacks leading to control-flow hijack.\nA:H - Double free plus use-after-free reliably corrupts the SLUB freelist and locks/destroys an already-destroyed mutex, producing an oops or panic; drivers that ignore `pinctrl_enable()`'s return value (e.g. sppctl) leave a dangling pointer live until unbind, guaranteeing a later crash."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/pinctrl/core.c"], "versions": [{"version": "6118714275f0a313ecc296a87ed1af32d9691bed", "lessThan": "735f4c6b6771eafe336404c157ca683ad72a040d", "status": "affected", "versionType": "git"}, {"version": "6118714275f0a313ecc296a87ed1af32d9691bed", "lessThan": "cdaa171473d98962ae86f2a663d398fda2fbeefd", "status": "affected", "versionType": "git"}, {"version": "6118714275f0a313ecc296a87ed1af32d9691bed", "lessThan": 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"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": "4.11", "versionEndExcluding": "4.19.314"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "5.4.276"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "5.10.217"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "5.15.159"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "6.1.91"}, {"vulnerable": true, "criteria": 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There is no remote or adjacent protocol handler involved.\nAC:L - The failing condition in `pinctrl_claim_hogs()` includes `-ENOMEM` from `create_pinctrl()`'s `kzalloc()` and from `pinctrl_dt_to_map()`, which a local attacker can drive via sustained memory pressure timed against a driver probe. Once the free happens the devres release is guaranteed to run on the dangling pointer, so no unwinnable race is required.\nPR:L - An unprivileged local account suffices to apply the allocation pressure that induces the `pinctrl_claim_hogs()` error path on a system where an affected pinctrl driver probes or re-probes. 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freelist and permits overlapping-allocation attacks leading to control-flow hijack.\nA:H - Double free plus use-after-free reliably corrupts the SLUB freelist and locks/destroys an already-destroyed mutex, producing an oops or panic; drivers that ignore `pinctrl_enable()`'s return value (e.g. sppctl) leave a dangling pointer live until unbind, guaranteeing a later crash."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6118714275f0a313ecc296a87ed1af32d9691bed", "lessThan": "735f4c6b6771eafe336404c157ca683ad72a040d", "versionType": "git"}, {"status": "affected", "version": "6118714275f0a313ecc296a87ed1af32d9691bed", "lessThan": "cdaa171473d98962ae86f2a663d398fda2fbeefd", "versionType": "git"}, {"status": "affected", "version": "6118714275f0a313ecc296a87ed1af32d9691bed", "lessThan": "288bc4aa75f150d6f1ee82dd43c6da1b438b6068", "versionType": "git"}, 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Es un puntero administrado por devm_ que se libera mediante devm_pinctrl_dev_release(), por lo que liberarlo en pinctrl_enable() generar\u00e1 una doble liberaci\u00f3n. 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{"affected_release": [{"advisory": "RHSA-2024:5102", "cpe": "cpe:/a:redhat:enterprise_linux:8::nfv", "package": "kernel-rt-0:4.18.0-553.16.1.rt7.357.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-08-08T00:00:00Z"}, {"advisory": "RHSA-2024:5101", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "kernel-0:4.18.0-553.16.1.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-08-08T00:00:00Z"}, {"advisory": "RHSA-2024:9315", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-503.11.1.el9_5", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-11-12T00:00:00Z"}, {"advisory": "RHSA-2024:9315", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-503.11.1.el9_5", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-11-12T00:00:00Z"}, {"advisory": "RHSA-2025:10701", "cpe": "cpe:/a:redhat:rhel_eus:9.4", "package": "kernel-0:5.14.0-427.76.1.el9_4", "product_name": "Red Hat Enterprise Linux 9.4 Extended Update Support", "release_date": "2025-07-09T00:00:00Z"}], "bugzilla": {"description": "kernel: pinctrl: core: delete incorrect free in pinctrl_enable()", "id": "2284477", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2284477"}, "csaw": false, "cvss3": {"cvss3_base_score": "2.3", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L", "status": "verified"}, "cwe": "CWE-415", "details": ["In the Linux kernel, the following vulnerability has been resolved:\npinctrl: core: delete incorrect free in pinctrl_enable()\nThe \"pctldev\" struct is allocated in devm_pinctrl_register_and_init().\nIt's a devm_ managed pointer that is freed by devm_pinctrl_dev_release(),\nso freeing it in pinctrl_enable() will lead to a double free.\nThe devm_pinctrl_dev_release() function frees the pindescs and destroys\nthe mutex as well."], "name": "CVE-2024-36940", "package_state": [{"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": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-05-30T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-36940\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-36940\nhttps://lore.kernel.org/linux-cve-announce/2024053043-CVE-2024-36940-0c83@gregkh/T"], "threat_severity": "Low"}

{}