{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-04-30T01:24:06.776","vulnerabilities":[{"cve":{"id":"CVE-2025-37816","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","published":"2025-05-08T07:15:52.837","lastModified":"2025-11-12T21:37:34.917","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmei: vsc: Fix fortify-panic caused by invalid counted_by() use\n\ngcc 15 honors the __counted_by(len) attribute on vsc_tp_packet.buf[]\nand the vsc-tp.c code is using this in a wrong way. len does not contain\nthe available size in the buffer, it contains the actual packet length\n*without* the crc. So as soon as vsc_tp_xfer() tries to add the crc to\nbuf[] the fortify-panic handler gets triggered:\n\n[   80.842193] memcpy: detected buffer overflow: 4 byte write of buffer size 0\n[   80.842243] WARNING: CPU: 4 PID: 272 at lib/string_helpers.c:1032 __fortify_report+0x45/0x50\n...\n[   80.843175]  __fortify_panic+0x9/0xb\n[   80.843186]  vsc_tp_xfer.cold+0x67/0x67 [mei_vsc_hw]\n[   80.843210]  ? seqcount_lockdep_reader_access.constprop.0+0x82/0x90\n[   80.843229]  ? lockdep_hardirqs_on+0x7c/0x110\n[   80.843250]  mei_vsc_hw_start+0x98/0x120 [mei_vsc]\n[   80.843270]  mei_reset+0x11d/0x420 [mei]\n\nThe easiest fix would be to just drop the counted-by but with the exception\nof the ack buffer in vsc_tp_xfer_helper() which only contains enough room\nfor the packet-header, all other uses of vsc_tp_packet always use a buffer\nof VSC_TP_MAX_XFER_SIZE bytes for the packet.\n\nInstead of just dropping the counted-by, split the vsc_tp_packet struct\ndefinition into a header and a full-packet definition and use a fixed\nsize buf[] in the packet definition, this way fortify-source buffer\noverrun checking still works when enabled."},{"lang":"es","value":"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mei: vsc: Se corrige el problema de fortify-panic causado por el uso no válido de counted_by() gcc 15 respeta el atributo __counted_by(len) en vsc_tp_packet.buf[] y el código vsc-tp.c lo usa de manera incorrecta. len no contiene el tamaño disponible en el búfer, contiene la longitud real del paquete *sin* el crc. Entonces, tan pronto como vsc_tp_xfer() intenta agregar el crc a buf[], se activa el controlador fortify-panic: [80.842193] memcpy: desbordamiento de búfer detectado: escritura de 4 bytes de tamaño de búfer 0 [80.842243] ADVERTENCIA: CPU: 4 PID: 272 en lib/string_helpers.c:1032 __fortify_report+0x45/0x50 ... [80.843175] __fortify_panic+0x9/0xb [80.843186] vsc_tp_xfer.cold+0x67/0x67 [mei_vsc_hw] [80.843210] ? lockdep_hardirqs_on+0x7c/0x110 [ 80.843250] mei_vsc_hw_start+0x98/0x120 [mei_vsc] [ 80.843270] mei_reset+0x11d/0x420 [mei] La solución más fácil sería simplemente omitir el conteo, pero con la excepción del búfer de reconocimiento en vsc_tp_xfer_helper() que solo contiene suficiente espacio para el encabezado del paquete, todos los demás usos de vsc_tp_packet siempre usan un búfer de VSC_TP_MAX_XFER_SIZE bytes para el paquete. En lugar de simplemente eliminar el conteo, divida la definición de la estructura vsc_tp_packet en un encabezado y una definición de paquete completo y use un buf[] de tamaño fijo en la definición del paquete, de esta manera la verificación de desbordamiento del búfer de fortify-source aún funciona cuando está habilitada."}],"metrics":{"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","baseScore":5.5,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":3.6}]},"weaknesses":[{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"NVD-CWE-noinfo"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"6.12.26","matchCriteriaId":"ADF8DED6-5191-4112-A6A1-96DB750D05C0"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13","versionEndExcluding":"6.14.5","matchCriteriaId":"6B25CA7E-4CD0-46DB-B4EF-13A3516071FB"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.15:rc1:*:*:*:*:*:*","matchCriteriaId":"8D465631-2980-487A-8E65-40AE2B9F8ED1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.15:rc2:*:*:*:*:*:*","matchCriteriaId":"4C9D071F-B28E-46EC-AC61-22B913390211"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.15:rc3:*:*:*:*:*:*","matchCriteriaId":"13FC0DDE-E513-465E-9E81-515702D49B74"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/00f1cc14da0f06d2897b8c528df7c7dcf1b8da50","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/3e243378f27cc7d11682a3ad720228b0723affa5","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/ac04663c67f244810b3492e9ecd9f7cdbefeca2d","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]}]}}]}