{"id":"CVE-2026-43111","state":"PUBLISHED","title":"HID: roccat: fix use-after-free in roccat_report_event","description":"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. 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.","publishedAt":"2026-05-06T07:40:37.916Z","updatedAt":"2026-10-19T19:06:13.763Z","severity":{"score":7.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378","status":"affected","lessThan":"20dca865460f7943cf70afca274b60dac371f546","versionType":"git"},{"version":"206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378","status":"affected","lessThan":"441689e3103694caa3e2d62b7d57c7bccefa5e37","versionType":"git"},{"version":"206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378","status":"affected","lessThan":"181ea51ab0f6370842c5b49cfb86824253a1189e","versionType":"git"},{"version":"206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378","status":"affected","lessThan":"e6a445513fbc6a0329d2d5ff375b6725750ec5a6","versionType":"git"},{"version":"206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378","status":"affected","lessThan":"e16a6d11bd77b81632165f02cf0d5946df74b3b7","versionType":"git"},{"version":"206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378","status":"affected","lessThan":"36bb2d0b915014bbdc5044982b31b57b78045b93","versionType":"git"},{"version":"206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378","status":"affected","lessThan":"bca0b595e15450dd66b1153c76c4ef1087ee011b","versionType":"git"},{"version":"206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378","status":"affected","lessThan":"d802d848308b35220f21a8025352f0c0aba15c12","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hid/hid-roccat.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.35","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.35","versionType":"semver"},{"version":"5.10.258","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.209","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.175","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.136","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.83","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.24","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.14","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hid/hid-roccat.c"]}],"references":["https://git.kernel.org/stable/c/20dca865460f7943cf70afca274b60dac371f546","https://git.kernel.org/stable/c/441689e3103694caa3e2d62b7d57c7bccefa5e37","https://git.kernel.org/stable/c/181ea51ab0f6370842c5b49cfb86824253a1189e","https://git.kernel.org/stable/c/e6a445513fbc6a0329d2d5ff375b6725750ec5a6","https://git.kernel.org/stable/c/e16a6d11bd77b81632165f02cf0d5946df74b3b7","https://git.kernel.org/stable/c/36bb2d0b915014bbdc5044982b31b57b78045b93","https://git.kernel.org/stable/c/bca0b595e15450dd66b1153c76c4ef1087ee011b","https://git.kernel.org/stable/c/d802d848308b35220f21a8025352f0c0aba15c12","https://cert-portal.siemens.com/productcert/html/ssa-784472.html"],"weaknesses":["CWE-362"],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/43xxx/CVE-2026-43111.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-43111","state":"PUBLISHED","datePublished":"2026-05-06T07:40:37.916Z","dateUpdated":"2026-10-19T19:06:13.763Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-05-01T14:12:55.986Z"},"containers":{"cna":{"title":"HID: roccat: fix use-after-free in roccat_report_event","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. 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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378","status":"affected","lessThan":"20dca865460f7943cf70afca274b60dac371f546","versionType":"git"},{"version":"206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378","status":"affected","lessThan":"441689e3103694caa3e2d62b7d57c7bccefa5e37","versionType":"git"},{"version":"206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378","status":"affected","lessThan":"181ea51ab0f6370842c5b49cfb86824253a1189e","versionType":"git"},{"version":"206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378","status":"affected","lessThan":"e6a445513fbc6a0329d2d5ff375b6725750ec5a6","versionType":"git"},{"version":"206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378","status":"affected","lessThan":"e16a6d11bd77b81632165f02cf0d5946df74b3b7","versionType":"git"},{"version":"206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378","status":"affected","lessThan":"36bb2d0b915014bbdc5044982b31b57b78045b93","versionType":"git"},{"version":"206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378","status":"affected","lessThan":"bca0b595e15450dd66b1153c76c4ef1087ee011b","versionType":"git"},{"version":"206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378","status":"affected","lessThan":"d802d848308b35220f21a8025352f0c0aba15c12","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hid/hid-roccat.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.35","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.35","versionType":"semver"},{"version":"5.10.258","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.209","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.175","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.136","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.83","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.24","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.14","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hid/hid-roccat.c"]}],"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"}],"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."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-05T12:25:58.562Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.35","versionEndExcluding":"5.10.258"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.35","versionEndExcluding":"5.15.209"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.35","versionEndExcluding":"6.1.175"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.35","versionEndExcluding":"6.6.136"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.35","versionEndExcluding":"6.12.83"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.35","versionEndExcluding":"6.18.24"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.35","versionEndExcluding":"6.19.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.35","versionEndExcluding":"7.0"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"affected":[{"vendor":"Siemens","product":"SIMATIC S7-1500 TM MFP - GNU/Linux subsystem","defaultStatus":"unknown","versions":[{"version":"0","status":"affected","lessThan":"*","versionType":"custom"}]}],"references":[{"url":"https://cert-portal.siemens.com/productcert/html/ssa-784472.html"}],"providerMetadata":{"shortName":"siemens-SADP","orgId":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e","dateUpdated":"2026-10-15T01:19:09.979Z"},"x_adpType":"supplier"},{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-43111","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2026-10-16T15:14:39.429610Z"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-362","lang":"en","type":"CWE","description":"CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-19T19:06:13.763Z"}}]}}}