{"cvss":0.0,"datePublished":"2026-08-04T07:16:31.477","dateUpdated":"2026-11-03T18:15:39.353","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nInput: ims-pcu - fix heap-buffer-overflow in ims_pcu_process_data()\n\nThe `ims_pcu_process_data()` processes incoming URB data byte by byte.\nHowever, it fails to check if the `read_pos` index exceeds\nIMS_PCU_BUF_SIZE.\n\nIf a malicious USB device sends a packet larger than IMS_PCU_BUF_SIZE,\n`read_pos` will increment indefinitely. Moreover, since `read_pos` is\nlocated immediately after `read_buf`, the attacker can overwrite\n`read_pos` itself to arbitrarily control the index.\n\nThis manipulated `read_pos` is subsequently used in\n`ims_pcu_handle_response()` to copy data into `cmd_buf`, leading to a\nheap buffer overflow.\n\nSpecifically, an attacker can overwrite the `cmd_done.wait.head` located\nat offset 136 relative to `cmd_buf` in the `ims_pcu_handle_response()`.\nConsequently, when the driver calls `complete(&pcu->cmd_done)`, it\ntriggers a control flow hijack by using the manipulated pointer.\n\nFix this by adding a bounds check for `read_pos` before writing to\n`read_buf`. If the packet is too long, discard it, log a warning,\nand reset the parser state.\n\n[dtor: factor out resetting packet state, reset checksum as well]","id":"CVE-2026-64565","raw":{"affected":[{"affectedData":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/input/misc/ims-pcu.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"06cfff93fd40441292567b999091beab11c74504","status":"affected","version":"628329d52474323938a03826941e166bc7c8eff4","versionType":"git"},{"lessThan":"992a7173364dcf63e30012af43da3c2f279839f9","status":"affected","version":"628329d52474323938a03826941e166bc7c8eff4","versionType":"git"},{"lessThan":"3a801bc75ba1d121d0ed60e7234f93ba5651d87d","status":"affected","version":"628329d52474323938a03826941e166bc7c8eff4","versionType":"git"},{"lessThan":"40bbbf2e91fd60715525bf0405c67876af817edf","status":"affected","version":"628329d52474323938a03826941e166bc7c8eff4","versionType":"git"},{"lessThan":"ca9f8c09845fb8c51b6d447f6428eecd1b8b0a49","status":"affected","version":"628329d52474323938a03826941e166bc7c8eff4","versionType":"git"},{"lessThan":"d03a740e087de7dcb2a26dc1123377bd3d1d84ca","status":"affected","version":"628329d52474323938a03826941e166bc7c8eff4","versionType":"git"},{"lessThan":"875115b82c295277b81b6dfee7debc725f44e854","status":"affected","version":"628329d52474323938a03826941e166bc7c8eff4","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/input/misc/ims-pcu.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"3.10"},{"lessThan":"3.10","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.265","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.216","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.183","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.148","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.101","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.42","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1","versionType":"original_commit_for_fix"}]}],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"cveTags":[],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nInput: ims-pcu - fix heap-buffer-overflow in ims_pcu_process_data()\n\nThe `ims_pcu_process_data()` processes incoming URB data byte by byte.\nHowever, it fails to check if the `read_pos` index exceeds\nIMS_PCU_BUF_SIZE.\n\nIf a malicious USB device sends a packet larger than IMS_PCU_BUF_SIZE,\n`read_pos` will increment indefinitely. Moreover, since `read_pos` is\nlocated immediately after `read_buf`, the attacker can overwrite\n`read_pos` itself to arbitrarily control the index.\n\nThis manipulated `read_pos` is subsequently used in\n`ims_pcu_handle_response()` to copy data into `cmd_buf`, leading to a\nheap buffer overflow.\n\nSpecifically, an attacker can overwrite the `cmd_done.wait.head` located\nat offset 136 relative to `cmd_buf` in the `ims_pcu_handle_response()`.\nConsequently, when the driver calls `complete(&pcu->cmd_done)`, it\ntriggers a control flow hijack by using the manipulated pointer.\n\nFix this by adding a bounds check for `read_pos` before writing to\n`read_buf`. If the packet is too long, discard it, log a warning,\nand reset the parser state.\n\n[dtor: factor out resetting packet state, reset checksum as well]"},{"lang":"es","value":"En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nEntrada: ims-pcu - soluciona desbordamiento de búfer de pila en ims_pcu_process_data()\n\nLa ’ims_pcu_process_data()’ procesa los datos URB entrantes byte a byte.\nSin embargo, no verifica si el índice ’read_pos’ excede ’IMS_PCU_BUF_SIZE’.\n\nSi un dispositivo USB malicioso envía un paquete más grande que ’IMS_PCU_BUF_SIZE’, ’read_pos’ se incrementará indefinidamente. Además, dado que ’read_pos’ se encuentra inmediatamente después de ’read_buf’, el atacante puede sobrescribir el propio ’read_pos’ para controlar arbitrariamente el índice.\n\nEste ’read_pos’ manipulado se utiliza posteriormente en ’ims_pcu_handle_response()’ para copiar datos en ’cmd_buf’, lo que lleva a un desbordamiento de búfer de pila.\n\nEspecíficamente, un atacante puede sobrescribir el ’cmd_done.wait.head’ ubicado en el desplazamiento 136 con respecto a ’cmd_buf’ en ’ims_pcu_handle_response()’. En consecuencia, cuando el controlador llama a ’complete(&pcu  ->  cmd_done)’, desencadena un secuestro de flujo de control mediante el uso del puntero manipulado.\n\nSolucione esto añadiendo una comprobación de límites para ’read_pos’ antes de escribir en ’read_buf’. Si el paquete es demasiado largo, deséchelo, registre una advertencia y reinicie el estado del analizador.\n\n[dtor: refactorizar el restablecimiento del estado del paquete, restablecer la suma de verificación también]"}],"id":"CVE-2026-64565","lastModified":"2026-11-03T18:15:39.353","metrics":{},"published":"2026-08-04T07:16:31.477","references":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","url":"https://git.kernel.org/stable/c/06cfff93fd40441292567b999091beab11c74504"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","url":"https://git.kernel.org/stable/c/3a801bc75ba1d121d0ed60e7234f93ba5651d87d"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","url":"https://git.kernel.org/stable/c/40bbbf2e91fd60715525bf0405c67876af817edf"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","url":"https://git.kernel.org/stable/c/875115b82c295277b81b6dfee7debc725f44e854"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","url":"https://git.kernel.org/stable/c/992a7173364dcf63e30012af43da3c2f279839f9"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","url":"https://git.kernel.org/stable/c/ca9f8c09845fb8c51b6d447f6428eecd1b8b0a49"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","url":"https://git.kernel.org/stable/c/d03a740e087de7dcb2a26dc1123377bd3d1d84ca"}],"sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","vulnStatus":"Awaiting Analysis"},"severity":"UNKNOWN","source":"nvd","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nInput: ims-pcu - fix heap-buffer-overflow in ims..."}