CVE-2024-35977

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This can trigger a NULL pointer\ndereference:\n\n BUG: kernel NULL pointer dereference, address: 0000000000000000\n ...\n Call Trace:\n <TASK>\n ...\n ? ttyport_receive_buf\n\nA simplified version of crashing code is as follows:\n\n static inline size_t serdev_controller_receive_buf(struct serdev_controller *ctrl,\n const u8 *data,\n size_t count)\n {\n struct serdev_device *serdev = ctrl->serdev;\n\n if (!serdev || !serdev->ops->receive_buf) // CRASH!\n return 0;\n\n return serdev->ops->receive_buf(serdev, data, count);\n }\n\nIt assumes that if SERPORT_ACTIVE is set and serdev exists, serdev->ops\nwill also exist. This conflicts with the existing cros_ec_uart_probe()\nlogic, as it first calls devm_serdev_device_open() (which sets\nSERPORT_ACTIVE), and only later sets serdev->ops via\nserdev_device_set_client_ops().\n\nCommit 01f95d42b8f4 (\"platform/chrome: cros_ec_uart: fix race\ncondition\") attempted to fix a similar race condition, but while doing\nso, made the window of error for this race condition to happen much\nwider.\n\nAttempt to fix the race condition again, making sure we fully setup\nbefore calling devm_serdev_device_open()."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/platform/chrome/cros_ec_uart.c"], "versions": [{"version": "01f95d42b8f4e88f20d68791b0a85dbb9e3d1ac9", "lessThan": "cfd758041d8b79aa8c3f811b6bd6105379f2f702", "status": "affected", "versionType": "git"}, {"version": "01f95d42b8f4e88f20d68791b0a85dbb9e3d1ac9", "lessThan": "9e9bb74a93b7daa32313ccaefd0edc529d40daf8", "status": "affected", "versionType": "git"}, {"version": "01f95d42b8f4e88f20d68791b0a85dbb9e3d1ac9", "lessThan": "5e700b384ec13f5bcac9855cb28fcc674f1d3593", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/platform/chrome/cros_ec_uart.c"], "versions": [{"version": "6.3", "status": "affected"}, {"version": "0", "lessThan": "6.3", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.28", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.8.7", "lessThanOrEqual": "6.8.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.9", "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": "6.3", "versionEndExcluding": "6.6.28"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "6.8.7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "6.9"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/cfd758041d8b79aa8c3f811b6bd6105379f2f702"}, {"url": "https://git.kernel.org/stable/c/9e9bb74a93b7daa32313ccaefd0edc529d40daf8"}, {"url": "https://git.kernel.org/stable/c/5e700b384ec13f5bcac9855cb28fcc674f1d3593"}], "title": "platform/chrome: cros_ec_uart: properly fix race condition", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T03:21:49.031Z"}, "title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/cfd758041d8b79aa8c3f811b6bd6105379f2f702", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/9e9bb74a93b7daa32313ccaefd0edc529d40daf8", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/5e700b384ec13f5bcac9855cb28fcc674f1d3593", "tags": ["x_transferred"]}]}, {"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2024-35977", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-09-10T15:40:22.902281Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T17:33:13.323Z"}}]}}

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This can trigger a NULL pointer\ndereference:\n\n BUG: kernel NULL pointer dereference, address: 0000000000000000\n ...\n Call Trace:\n <TASK>\n ...\n ? ttyport_receive_buf\n\nA simplified version of crashing code is as follows:\n\n static inline size_t serdev_controller_receive_buf(struct serdev_controller *ctrl,\n const u8 *data,\n size_t count)\n {\n struct serdev_device *serdev = ctrl->serdev;\n\n if (!serdev || !serdev->ops->receive_buf) // CRASH!\n return 0;\n\n return serdev->ops->receive_buf(serdev, data, count);\n }\n\nIt assumes that if SERPORT_ACTIVE is set and serdev exists, serdev->ops\nwill also exist. 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This can trigger a NULL pointer\ndereference:\n\n BUG: kernel NULL pointer dereference, address: 0000000000000000\n ...\n Call Trace:\n <TASK>\n ...\n ? ttyport_receive_buf\n\nA simplified version of crashing code is as follows:\n\n static inline size_t serdev_controller_receive_buf(struct serdev_controller *ctrl,\n const u8 *data,\n size_t count)\n {\n struct serdev_device *serdev = ctrl->serdev;\n\n if (!serdev || !serdev->ops->receive_buf) // CRASH!\n return 0;\n\n return serdev->ops->receive_buf(serdev, data, count);\n }\n\nIt assumes that if SERPORT_ACTIVE is set and serdev exists, serdev->ops\nwill also exist. This conflicts with the existing cros_ec_uart_probe()\nlogic, as it first calls devm_serdev_device_open() (which sets\nSERPORT_ACTIVE), and only later sets serdev->ops via\nserdev_device_set_client_ops().\n\nCommit 01f95d42b8f4 (\"platform/chrome: cros_ec_uart: fix race\ncondition\") attempted to fix a similar race condition, but while doing\nso, made the window of error for this race condition to happen much\nwider.\n\nAttempt to fix the race condition again, making sure we fully setup\nbefore calling devm_serdev_device_open()."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: plataforma/chrome: cros_ec_uart: corrige correctamente la condici\u00f3n de ejecuci\u00f3n. La funci\u00f3n cros_ec_uart_probe() llama a devm_serdev_device_open() antes de llamar a serdev_device_set_client_ops(). Esto puede desencadenar una desreferencia del puntero NULL: ERROR: desreferencia del puntero NULL del kernel, direcci\u00f3n: 0000000000000000... Seguimiento de llamadas: ...? ttyport_receive_buf Una versi\u00f3n simplificada del c\u00f3digo de bloqueo es la siguiente: static inline size_t serdev_controller_receive_buf(struct serdev_controller *ctrl, const u8 *data, size_t count) { struct serdev_device *serdev = ctrl-&gt;serdev; if (!serdev || !serdev-&gt;ops-&gt;receive_buf) // \u00a1CRASH! devolver 0; devolver serdev-&gt;ops-&gt;receive_buf(serdev, datos, recuento); } Se supone que si SERPORT_ACTIVE est\u00e1 configurado y serdev existe, serdev-&gt;ops tambi\u00e9n existir\u00e1. Esto entra en conflicto con la l\u00f3gica cros_ec_uart_probe() existente, ya que primero llama a devm_serdev_device_open() (que configura SERPORT_ACTIVE), y solo luego configura serdev-&gt;ops a trav\u00e9s de serdev_device_set_client_ops(). La confirmaci\u00f3n 01f95d42b8f4 (\"plataforma/chrome: cros_ec_uart: arreglar condici\u00f3n de ejecuci\u00f3n\") intent\u00f3 arreglar una condici\u00f3n de ejecuci\u00f3n similar, pero al hacerlo, hizo que la ventana de error para que esta condici\u00f3n de ejecuci\u00f3n ocurriera fuera mucho m\u00e1s amplia. Intente corregir la condici\u00f3n de ejecuci\u00f3n nuevamente, asegur\u00e1ndose de realizar la configuraci\u00f3n completa antes de llamar a devm_serdev_device_open()."}], "id": "CVE-2024-35977", "lastModified": "2026-06-17T07:35:51.797", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 4.7, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-35977", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-09-10T15:40:22.902281Z", "version": "2.0.3"}}]}, "published": "2024-05-20T10:15:12.340", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5e700b384ec13f5bcac9855cb28fcc674f1d3593"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9e9bb74a93b7daa32313ccaefd0edc529d40daf8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/cfd758041d8b79aa8c3f811b6bd6105379f2f702"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5e700b384ec13f5bcac9855cb28fcc674f1d3593"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9e9bb74a93b7daa32313ccaefd0edc529d40daf8"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/cfd758041d8b79aa8c3f811b6bd6105379f2f702"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-362"}, {"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: platform/chrome: cros_ec_uart: properly fix race condition", "id": "2281882", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2281882"}, "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:\nplatform/chrome: cros_ec_uart: properly fix race condition\nThe cros_ec_uart_probe() function calls devm_serdev_device_open() before\nit calls serdev_device_set_client_ops(). This can trigger a NULL pointer\ndereference:\nBUG: kernel NULL pointer dereference, address: 0000000000000000\n...\nCall Trace:\n<TASK>\n...\n? ttyport_receive_buf\nA simplified version of crashing code is as follows:\nstatic inline size_t serdev_controller_receive_buf(struct serdev_controller *ctrl,\nconst u8 *data,\nsize_t count)\n{\nstruct serdev_device *serdev = ctrl->serdev;\nif (!serdev || !serdev->ops->receive_buf) // CRASH!\nreturn 0;\nreturn serdev->ops->receive_buf(serdev, data, count);\n}\nIt assumes that if SERPORT_ACTIVE is set and serdev exists, serdev->ops\nwill also exist. This conflicts with the existing cros_ec_uart_probe()\nlogic, as it first calls devm_serdev_device_open() (which sets\nSERPORT_ACTIVE), and only later sets serdev->ops via\nserdev_device_set_client_ops().\nCommit 01f95d42b8f4 (\"platform/chrome: cros_ec_uart: fix race\ncondition\") attempted to fix a similar race condition, but while doing\nso, made the window of error for this race condition to happen much\nwider.\nAttempt to fix the race condition again, making sure we fully setup\nbefore calling devm_serdev_device_open().", "A race condition vulnerability was found in the Linux kernel's `cros_ec_uart` driver. This issue occurs because the `cros_ec_uart_probe()` function calls `devm_serdev_device_open()` before initializing the `serdev->ops` via `serdev_device_set_client_ops()`. This mismatch can cause a NULL pointer dereference when accessing `serdev->ops->receive_buf`, leading to a crash."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2024-35977", "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": "2024-05-20T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-35977\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-35977\nhttps://lore.kernel.org/linux-cve-announce/2024052025-CVE-2024-35977-5edd@gregkh/T"], "statement": "Red Hat Enterprise Linux is not vulnerable to this CVE, as it does not affect the versions or configurations of the Linux kernel used in its distributions.", "threat_severity": "Moderate"}

{}