CVE-2026-43111

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This allows a concurrent roccat_release() to\nremove and free a reader while it's still being accessed, leading to a\nuse-after-free.\n\nProtect the readers list traversal with the readers_lock mutex."}], "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 - Roccat-specific sysfs/HID event paths feed roccat_report_event(), and exploitation of the vulnerable reader-list race requires local control of /dev/roccat* open/release activity on a system with an affected Roccat USB HID device. There is no network or adjacent protocol path.\nAC:L - The bug is a missing readers_lock around list traversal, and an attacker with device-node access can repeatedly open/close readers while generating reports through the Roccat device/sysfs path. The race is attacker-influenced rather than dependent on rare external conditions.\nPR:L - The relevant roccat char-device operations do not perform capability checks, but the attacker needs local DAC/udev access to the Roccat device/sysfs nodes. In a reasonable desktop or workstation deployment this is low-privileged user access, not real init-namespace root.\nUI:N - Once the affected device and driver are present, exploitation does not require a victim to perform an action. The attacker can drive the racing file operations and report generation directly.\nS:U - The vulnerability corrupts kernel memory within the same kernel security authority. It does not cross a VM, IOMMU, or other separate security scope boundary.\nC:H - This is a kernel use-after-free of struct roccat_reader during list traversal, allowing freed heap memory to be dereferenced after attacker-influenced reallocation. Following the required conservative UAF guidance, this can support high confidentiality impact.\nI:H - The stale reader object is not only read but can have cbuf_start updated and its list pointers traversed after free, giving a plausible kernel heap corruption primitive. Following the required conservative UAF guidance, this supports high integrity impact.\nA:H - Even without full exploitation, dereferencing or walking a freed list element can produce a kernel oops, panic, or hang. Repeated triggering can therefore cause high availability impact."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/hid/hid-roccat.c"], "versions": [{"version": "206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378", "lessThan": "20dca865460f7943cf70afca274b60dac371f546", "status": "affected", "versionType": "git"}, {"version": "206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378", "lessThan": "441689e3103694caa3e2d62b7d57c7bccefa5e37", "status": "affected", "versionType": "git"}, {"version": "206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378", "lessThan": "181ea51ab0f6370842c5b49cfb86824253a1189e", "status": "affected", "versionType": "git"}, {"version": "206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378", "lessThan": "e6a445513fbc6a0329d2d5ff375b6725750ec5a6", "status": "affected", "versionType": "git"}, {"version": "206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378", "lessThan": 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There is no network or adjacent protocol path.\nAC:L - The bug is a missing readers_lock around list traversal, and an attacker with device-node access can repeatedly open/close readers while generating reports through the Roccat device/sysfs path. The race is attacker-influenced rather than dependent on rare external conditions.\nPR:L - The relevant roccat char-device operations do not perform capability checks, but the attacker needs local DAC/udev access to the Roccat device/sysfs nodes. In a reasonable desktop or workstation deployment this is low-privileged user access, not real init-namespace root.\nUI:N - Once the affected device and driver are present, exploitation does not require a victim to perform an action. The attacker can drive the racing file operations and report generation directly.\nS:U - The vulnerability corrupts kernel memory within the same kernel security authority. It does not cross a VM, IOMMU, or other separate security scope boundary.\nC:H - This is a kernel use-after-free of struct roccat_reader during list traversal, allowing freed heap memory to be dereferenced after attacker-influenced reallocation. Following the required conservative UAF guidance, this can support high confidentiality impact.\nI:H - The stale reader object is not only read but can have cbuf_start updated and its list pointers traversed after free, giving a plausible kernel heap corruption primitive. Following the required conservative UAF guidance, this supports high integrity impact.\nA:H - Even without full exploitation, dereferencing or walking a freed list element can produce a kernel oops, panic, or hang. Repeated triggering can therefore cause high availability impact."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378", "lessThan": "20dca865460f7943cf70afca274b60dac371f546", "versionType": "git"}, {"status": "affected", "version": "206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378", "lessThan": "441689e3103694caa3e2d62b7d57c7bccefa5e37", "versionType": "git"}, {"status": "affected", "version": "206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378", "lessThan": "181ea51ab0f6370842c5b49cfb86824253a1189e", "versionType": "git"}, {"status": "affected", "version": "206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378", "lessThan": "e6a445513fbc6a0329d2d5ff375b6725750ec5a6", "versionType": "git"}, {"status": "affected", "version": "206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378", "lessThan": "e16a6d11bd77b81632165f02cf0d5946df74b3b7", "versionType": "git"}, {"status": "affected", "version": "206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378", "lessThan": "36bb2d0b915014bbdc5044982b31b57b78045b93", "versionType": "git"}, {"status": "affected", "version": "206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378", "lessThan": "bca0b595e15450dd66b1153c76c4ef1087ee011b", "versionType": "git"}, {"status": "affected", "version": "206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378", "lessThan": "d802d848308b35220f21a8025352f0c0aba15c12", "versionType": "git"}], "programFiles": ["drivers/hid/hid-roccat.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "2.6.35"}, {"status": "unaffected", "version": "0", "lessThan": "2.6.35", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.258", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.209", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.175", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.136", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.83", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.24", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "6.19.14", "versionType": "semver", "lessThanOrEqual": "6.19.*"}, {"status": "unaffected", "version": "7.0", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/hid/hid-roccat.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/20dca865460f7943cf70afca274b60dac371f546"}, {"url": "https://git.kernel.org/stable/c/441689e3103694caa3e2d62b7d57c7bccefa5e37"}, {"url": "https://git.kernel.org/stable/c/181ea51ab0f6370842c5b49cfb86824253a1189e"}, {"url": "https://git.kernel.org/stable/c/e6a445513fbc6a0329d2d5ff375b6725750ec5a6"}, {"url": "https://git.kernel.org/stable/c/e16a6d11bd77b81632165f02cf0d5946df74b3b7"}, {"url": "https://git.kernel.org/stable/c/36bb2d0b915014bbdc5044982b31b57b78045b93"}, {"url": "https://git.kernel.org/stable/c/bca0b595e15450dd66b1153c76c4ef1087ee011b"}, {"url": "https://git.kernel.org/stable/c/d802d848308b35220f21a8025352f0c0aba15c12"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: roccat: fix use-after-free in roccat_report_event\n\nroccat_report_event() iterates over the device->readers list without\nholding the readers_lock. 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This allows a concurrent roccat_release() to\nremove and free a reader while it's still being accessed, leading to a\nuse-after-free.\n\nProtect the readers list traversal with the readers_lock mutex."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nHID: roccat: correcci\u00f3n de uso despu\u00e9s de liberaci\u00f3n en roccat_report_event\n\nroccat_report_event() itera sobre la lista device -> readers sin mantener el readers_lock. Esto permite a un roccat_release() concurrente eliminar y liberar un lector mientras a\u00fan est\u00e1 siendo accedido, lo que lleva a un uso despu\u00e9s de liberaci\u00f3n.\n\nProteger el recorrido de la lista readers con el mutex readers_lock."}], "id": "CVE-2026-43111", "lastModified": "2026-11-11T21:10:00.200", "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"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-43111", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T15:14:39.429610Z", "version": "2.0.3"}}]}, "published": "2026-05-06T10:16:24.807", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/181ea51ab0f6370842c5b49cfb86824253a1189e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/20dca865460f7943cf70afca274b60dac371f546"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/36bb2d0b915014bbdc5044982b31b57b78045b93"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/441689e3103694caa3e2d62b7d57c7bccefa5e37"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/bca0b595e15450dd66b1153c76c4ef1087ee011b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d802d848308b35220f21a8025352f0c0aba15c12"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e16a6d11bd77b81632165f02cf0d5946df74b3b7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e6a445513fbc6a0329d2d5ff375b6725750ec5a6"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-784472.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-362"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: HID: roccat: fix use-after-free in roccat_report_event", "id": "2466989", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2466989"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-820", "details": ["A flaw was found in the Linux kernel's roccat Human Interface Device (HID) driver. This vulnerability, a use-after-free, arises from a synchronization issue where the `roccat_report_event()` function accesses a list of readers without adequate locking. A local attacker could exploit this to cause a system crash (denial of service) or potentially execute arbitrary code, compromising system integrity."], "name": "CVE-2026-43111", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-06T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-43111\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43111\nhttps://lore.kernel.org/linux-cve-announce/2026050624-CVE-2026-43111-1e4c@gregkh/T"], "threat_severity": "Moderate"}

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