CVE-2024-36890

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An example of this is in wm831x_gpio_dbg_show().\n\n 171\tchar *label __free(kfree) = gpiochip_dup_line_label(chip, i);\n 172\tif (IS_ERR(label)) {\n 173\t\tdev_err(wm831x->dev, \"Failed to duplicate label\\n\");\n 174\t\tcontinue;\n 175 }\n\nThe auto clean up function should check for error pointers as well,\notherwise we're going to keep hitting issues like this."}], "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 cleanup handler is reached by a local `read()` of the debugfs files `/sys/kernel/debug/gpio` or `/sys/kernel/debug/pinctrl/*/pins`, which dispatch to the affected `dbg_show` callbacks. There is no network or remote path into any `__free(kfree)` site that can receive an error pointer.\nAC:L - Both sides of the trigger are attacker-controlled: the attacker drives system memory pressure to make `kstrdup()` in `gpiochip_dup_line_label()` return `ERR_PTR(-ENOMEM)` while repeatedly reading the debugfs file in a loop, and the resulting bad pointer value is fixed and deterministic rather than layout-dependent.\nPR:L - The kernel creates the gpio debugfs entry mode 0444 under a 0755 debugfs root, so on the many embedded, Android and industrial images that mount debugfs permissively an ordinary unprivileged local account can read it; no capability check exists on the path.\nUI:N - The attacker performs the debugfs read and the memory-pressure generation entirely on their own; no victim process, mount, or administrator action is required.\nS:U - The corruption is confined to the kernel's own slab allocator and page refcounts within the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - `kfree()` resolves the error pointer to a real populated `struct page` and either drops a refcount on an unrelated live page or splices a wild pointer onto a live slab freelist, so a subsequent allocation can hand out a pointer aliasing arbitrary kernel memory and disclose its contents.\nI:H - The same slab freelist poisoning gives a controlled kernel write when the wild pointer is later returned by `kmalloc()` and written to, and `folio_put()` on an in-use folio yields a page-level use-after-free \u2014 both are standard primitives for control-flow hijack.\nA:H - In the common case `virt_to_folio()` on `ERR_PTR(-ENOMEM)` dereferences bogus page metadata and the subsequent free corrupts allocator state, producing an immediate oops or a later panic, and it can be re-triggered on every read of the debugfs file."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": 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There is no network or remote path into any `__free(kfree)` site that can receive an error pointer.\nAC:L - Both sides of the trigger are attacker-controlled: the attacker drives system memory pressure to make `kstrdup()` in `gpiochip_dup_line_label()` return `ERR_PTR(-ENOMEM)` while repeatedly reading the debugfs file in a loop, and the resulting bad pointer value is fixed and deterministic rather than layout-dependent.\nPR:L - The kernel creates the gpio debugfs entry mode 0444 under a 0755 debugfs root, so on the many embedded, Android and industrial images that mount debugfs permissively an ordinary unprivileged local account can read it; no capability check exists on the path.\nUI:N - The attacker performs the debugfs read and the memory-pressure generation entirely on their own; no victim process, mount, or administrator action is required.\nS:U - The corruption is confined to the kernel's own slab allocator and page refcounts within the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - `kfree()` resolves the error pointer to a real populated `struct page` and either drops a refcount on an unrelated live page or splices a wild pointer onto a live slab freelist, so a subsequent allocation can hand out a pointer aliasing arbitrary kernel memory and disclose its contents.\nI:H - The same slab freelist poisoning gives a controlled kernel write when the wild pointer is later returned by `kmalloc()` and written to, and `folio_put()` on an in-use folio yields a page-level use-after-free \u2014 both are standard primitives for control-flow hijack.\nA:H - In the common case `virt_to_folio()` on `ERR_PTR(-ENOMEM)` dereferences bogus page metadata and the subsequent free corrupts allocator state, producing an immediate oops or a later panic, and it can be re-triggered on every read of the debugfs file."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "af53aaf20722d745a69a051114a1ae237f5b922e", "lessThan": "edca32f87329d6e341d2143a3b58ec254e8f6b88", "versionType": "git"}, {"status": "affected", "version": "f550466949e822afcd0b546a4fc35795930660bc", "lessThan": "946771c2a2b1150f9b7286feadc3aa1e15a1eb16", "versionType": "git"}, {"status": "affected", "version": "3c6cc62ce1265aa5623e2e1b29c0fe258bf6e232", "lessThan": "9f6eb0ab4f95240589ee85fd9886a944cd3645b2", "versionType": "git"}, {"status": "affected", "version": "54da6a0924311c7cf5015533991e44fb8eb12773", "lessThan": "ac6cf3ce9b7d12acb7b528248df5f87caa25fcdc", "versionType": "git"}, {"status": "affected", "version": "54da6a0924311c7cf5015533991e44fb8eb12773", "lessThan": "79cbe0be6c0317b215ddd8bd3e32f0afdac48543", "versionType": "git"}, {"status": "affected", "version": "54da6a0924311c7cf5015533991e44fb8eb12773", "lessThan": "cd7eb8f83fcf258f71e293f7fc52a70be8ed0128", "versionType": "git"}, {"status": "affected", "version": "6.1.79", "lessThan": "6.1.91", "versionType": "semver"}], "programFiles": ["include/linux/slab.h"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.5"}, {"status": "unaffected", "version": "0", "lessThan": "6.5", "versionType": "semver"}, {"status": "unaffected", "version": "6.1.91", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.31", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.8.10", "versionType": "semver", "lessThanOrEqual": "6.8.*"}, {"status": "unaffected", "version": "6.9", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["include/linux/slab.h"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/edca32f87329d6e341d2143a3b58ec254e8f6b88"}, {"url": "https://git.kernel.org/stable/c/946771c2a2b1150f9b7286feadc3aa1e15a1eb16"}, {"url": "https://git.kernel.org/stable/c/9f6eb0ab4f95240589ee85fd9886a944cd3645b2"}, {"url": "https://git.kernel.org/stable/c/ac6cf3ce9b7d12acb7b528248df5f87caa25fcdc"}, {"url": "https://git.kernel.org/stable/c/79cbe0be6c0317b215ddd8bd3e32f0afdac48543"}, {"url": "https://git.kernel.org/stable/c/cd7eb8f83fcf258f71e293f7fc52a70be8ed0128"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/slab: make __free(kfree) accept error pointers\n\nCurrently, if an automatically freed allocation is an error pointer that\nwill lead to a crash. An example of this is in wm831x_gpio_dbg_show().\n\n 171\tchar *label __free(kfree) = gpiochip_dup_line_label(chip, i);\n 172\tif (IS_ERR(label)) {\n 173\t\tdev_err(wm831x->dev, \"Failed to duplicate label\\n\");\n 174\t\tcontinue;\n 175 }\n\nThe auto clean up function should check for error pointers as well,\notherwise we're going to keep hitting issues like this."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.91", "versionStartIncluding": "6.1.79"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.31", "versionStartIncluding": "6.5"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.8.10", "versionStartIncluding": "6.5"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.9", "versionStartIncluding": "6.5"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:31:52.212Z"}}}, "cveMetadata": {"cveId": "CVE-2024-36890", "state": "PUBLISHED", "dateUpdated": "2026-08-05T11:31:52.212Z", "dateReserved": "2024-05-30T15:25:07.065Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-05-30T15:28:57.373Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["include/linux/slab.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "edca32f87329d6e341d2143a3b58ec254e8f6b88", "status": "affected", "version": "af53aaf20722d745a69a051114a1ae237f5b922e", "versionType": "git"}, {"lessThan": "946771c2a2b1150f9b7286feadc3aa1e15a1eb16", "status": "affected", "version": "f550466949e822afcd0b546a4fc35795930660bc", "versionType": "git"}, {"lessThan": "9f6eb0ab4f95240589ee85fd9886a944cd3645b2", "status": "affected", "version": "3c6cc62ce1265aa5623e2e1b29c0fe258bf6e232", "versionType": "git"}, {"lessThan": "ac6cf3ce9b7d12acb7b528248df5f87caa25fcdc", "status": "affected", "version": "54da6a0924311c7cf5015533991e44fb8eb12773", "versionType": "git"}, {"lessThan": "79cbe0be6c0317b215ddd8bd3e32f0afdac48543", "status": "affected", "version": "54da6a0924311c7cf5015533991e44fb8eb12773", "versionType": "git"}, {"lessThan": "cd7eb8f83fcf258f71e293f7fc52a70be8ed0128", "status": "affected", "version": "54da6a0924311c7cf5015533991e44fb8eb12773", "versionType": "git"}, {"lessThan": "6.1.91", "status": "affected", "version": "6.1.79", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["include/linux/slab.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.5"}, {"lessThan": "6.5", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.91", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.31", "versionType": "semver"}, {"lessThanOrEqual": "6.8.*", "status": "unaffected", "version": "6.8.10", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.9", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "C3AC03E4-5FB1-4289-ADD7-C4D83F763978", "versionEndExcluding": "6.1.91", "versionStartIncluding": "6.1.79", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "9CB26EA3-7B5D-4DF3-9158-7496BD09926F", "versionEndExcluding": "6.6.31", "versionStartIncluding": "6.5", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "6A6B920C-8D8F-4130-86B4-AD334F4CF2E3", "versionEndExcluding": "6.8.10", "versionStartIncluding": "6.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.9:rc1:*:*:*:*:*:*", "matchCriteriaId": "22BEDD49-2C6D-402D-9DBF-6646F6ECD10B", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.9:rc2:*:*:*:*:*:*", "matchCriteriaId": "DF73CB2A-DFFD-46FB-9BFE-AA394F27EA37", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.9:rc3:*:*:*:*:*:*", "matchCriteriaId": "52048DDA-FC5A-4363-95A0-A6357B4D7F8C", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.9:rc4:*:*:*:*:*:*", "matchCriteriaId": "A06B2CCF-3F43-4FA9-8773-C83C3F5764B2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.9:rc5:*:*:*:*:*:*", "matchCriteriaId": "F850DCEC-E08B-4317-A33B-D2DCF39F601B", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.9:rc6:*:*:*:*:*:*", "matchCriteriaId": "91326417-E981-482E-A5A3-28BC1327521B", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.9:rc7:*:*:*:*:*:*", "matchCriteriaId": "DAECDCD8-F556-4606-8D7B-5C6D47A501F2", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/slab: make __free(kfree) accept error pointers\n\nCurrently, if an automatically freed allocation is an error pointer that\nwill lead to a crash. An example of this is in wm831x_gpio_dbg_show().\n\n 171\tchar *label __free(kfree) = gpiochip_dup_line_label(chip, i);\n 172\tif (IS_ERR(label)) {\n 173\t\tdev_err(wm831x->dev, \"Failed to duplicate label\\n\");\n 174\t\tcontinue;\n 175 }\n\nThe auto clean up function should check for error pointers as well,\notherwise we're going to keep hitting issues like this."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mm/slab: make __free(kfree) acepta punteros de error Actualmente, si una asignaci\u00f3n liberada autom\u00e1ticamente es un puntero de error que provocar\u00e1 un bloqueo. Un ejemplo de esto est\u00e1 en wm831x_gpio_dbg_show(). 171 caracteres *etiqueta __free(kfree) = gpiochip_dup_line_label(chip, i); 172 if (IS_ERR(etiqueta)) { 173 dev_err(wm831x->dev, \"Error al duplicar la etiqueta\\n\"); 174 contin\u00faan; 175 } La funci\u00f3n de limpieza autom\u00e1tica tambi\u00e9n deber\u00eda comprobar si hay indicadores de error; de lo contrario, seguiremos teniendo problemas como este."}], "id": "CVE-2024-36890", "lastModified": "2026-08-04T11:18:27.523", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-36890", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-06-06T18:34:10.099765Z", "version": "2.0.3"}}]}, "published": "2024-05-30T16:15:12.493", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/79cbe0be6c0317b215ddd8bd3e32f0afdac48543"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/946771c2a2b1150f9b7286feadc3aa1e15a1eb16"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9f6eb0ab4f95240589ee85fd9886a944cd3645b2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ac6cf3ce9b7d12acb7b528248df5f87caa25fcdc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/cd7eb8f83fcf258f71e293f7fc52a70be8ed0128"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/edca32f87329d6e341d2143a3b58ec254e8f6b88"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/79cbe0be6c0317b215ddd8bd3e32f0afdac48543"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9f6eb0ab4f95240589ee85fd9886a944cd3645b2"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ac6cf3ce9b7d12acb7b528248df5f87caa25fcdc"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/cd7eb8f83fcf258f71e293f7fc52a70be8ed0128"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-763"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: mm/slab: make __free(kfree) accept error pointers", "id": "2284569", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2284569"}, "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"}, "cwe": "CWE-20", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nmm/slab: make __free(kfree) accept error pointers\nCurrently, if an automatically freed allocation is an error pointer that\nwill lead to a crash. An example of this is in wm831x_gpio_dbg_show().\n171char *label __free(kfree) = gpiochip_dup_line_label(chip, i);\n172if (IS_ERR(label)) {\n173dev_err(wm831x->dev, \"Failed to duplicate label\\n\");\n174continue;\n175 }\nThe auto clean up function should check for error pointers as well,\notherwise we're going to keep hitting issues like this."], "name": "CVE-2024-36890", "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": "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not 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-2024-36890\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-36890\nhttps://lore.kernel.org/linux-cve-announce/2024053033-CVE-2024-36890-b999@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-07-13T11:14:43.543358+00:00", "updated": "2025-07-13T11:14:43.543406+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}