{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-05-05T22:37:40.023","vulnerabilities":[{"cve":{"id":"CVE-2025-22035","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","published":"2025-04-16T15:15:56.110","lastModified":"2025-11-03T20:17:38.707","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Fix use-after-free in print_graph_function_flags during tracer switching\n\nKairui reported a UAF issue in print_graph_function_flags() during\nftrace stress testing [1]. This issue can be reproduced if puting a\n'mdelay(10)' after 'mutex_unlock(&trace_types_lock)' in s_start(),\nand executing the following script:\n\n  $ echo function_graph > current_tracer\n  $ cat trace > /dev/null &\n  $ sleep 5  # Ensure the 'cat' reaches the 'mdelay(10)' point\n  $ echo timerlat > current_tracer\n\nThe root cause lies in the two calls to print_graph_function_flags\nwithin print_trace_line during each s_show():\n\n  * One through 'iter->trace->print_line()';\n  * Another through 'event->funcs->trace()', which is hidden in\n    print_trace_fmt() before print_trace_line returns.\n\nTracer switching only updates the former, while the latter continues\nto use the print_line function of the old tracer, which in the script\nabove is print_graph_function_flags.\n\nMoreover, when switching from the 'function_graph' tracer to the\n'timerlat' tracer, s_start only calls graph_trace_close of the\n'function_graph' tracer to free 'iter->private', but does not set\nit to NULL. This provides an opportunity for 'event->funcs->trace()'\nto use an invalid 'iter->private'.\n\nTo fix this issue, set 'iter->private' to NULL immediately after\nfreeing it in graph_trace_close(), ensuring that an invalid pointer\nis not passed to other tracers. Additionally, clean up the unnecessary\n'iter->private = NULL' during each 'cat trace' when using wakeup and\nirqsoff tracers.\n\n [1] https://lore.kernel.org/all/20231112150030.84609-1-ryncsn@gmail.com/"},{"lang":"es","value":"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: tracing: Fix use-after-free en print_graph_function_flags durante el cambio de tracer Kairui informó de un problema de UAF en print_graph_function_flags() durante las pruebas de estrés de ftrace [1]. Este problema se puede reproducir si se pone un 'mdelay(10)' después de 'mutex_unlock(&trace_types_lock)' en s_start() y se ejecuta el siguiente script: $ echo function_graph > current_tracer $ cat trace > /dev/null & $ sleep 5 # Asegurarse de que 'cat' alcance el punto 'mdelay(10)' $ echo timerlat > current_tracer La causa raíz se encuentra en las dos llamadas a print_graph_function_flags dentro de print_trace_line durante cada s_show(): * Una a través de 'iter->trace->print_line()'; * Otra función mediante 'event->funcs->trace()', que está oculta en print_trace_fmt() antes del retorno de print_trace_line. Al cambiar de trazador, solo se actualiza el primero, mientras que el segundo continúa usando la función print_line del trazador anterior, que en el script anterior es print_graph_function_flags. Además, al cambiar del trazador 'function_graph' al trazador 'timerlat', s_start solo llama a graph_trace_close del trazador 'function_graph' para liberar 'iter->private', pero no lo establece en NULL. Esto permite que 'event->funcs->trace()' use un 'iter->private' no válido. Para solucionar este problema, establezca 'iter->private' en NULL inmediatamente después de liberarlo en graph_trace_close(), lo que garantiza que no se pase un puntero no válido a otros trazadores. Además, limpie el 'iter->private = NULL' innecesario durante cada 'cat trace' al usar los trazadores wakeup e irqsoff. [1] https://lore.kernel.org/all/20231112150030.84609-1-ryncsn@gmail.com/"}],"metrics":{"cvssMetricV31":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","cvssData":{"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","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9}]},"weaknesses":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","description":[{"lang":"en","value":"CWE-416"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14.324","versionEndExcluding":"4.15","matchCriteriaId":"71EE7896-7ADF-4518-840E-AFA5008A220C"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19.293","versionEndExcluding":"4.20","matchCriteriaId":"D51950EF-B814-4998-A0B2-65B014DDF4B1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4.255","versionEndExcluding":"5.4.292","matchCriteriaId":"6E1C0F63-4CF8-4DBE-8382-68AAF5BA2EEF"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10.193","versionEndExcluding":"5.10.236","matchCriteriaId":"C6A39FE1-2EDE-4A5B-A6B8-1FF7FB12FCD7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15.129","versionEndExcluding":"5.15.180","matchCriteriaId":"954DCB85-1A70-4D6F-803D-F08554B92053"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.50","versionEndExcluding":"6.1.134","matchCriteriaId":"64F3AB12-D09C-4CC0-A1D0-80C64AE2F11C"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4.13","versionEndExcluding":"6.6.87","matchCriteriaId":"043416BF-CC26-44F1-88BF-D9468ABD1929"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"6.12.23","matchCriteriaId":"26CAB76D-F00F-43CE-BEAD-7097F8FB1D6C"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13","versionEndExcluding":"6.13.11","matchCriteriaId":"E7E864B0-8C00-4679-BA55-659B4C9C3AD3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.14","versionEndExcluding":"6.14.2","matchCriteriaId":"FADAE5D8-4808-442C-B218-77B2CE8780A0"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/099ef3385800828b74933a96c117574637c3fb3a","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/42561fe62c3628ea3bc9623f64f047605e98857f","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/70be951bc01e4a0e10d443f3510bb17426f257fb","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/7f81f27b1093e4895e87b74143c59c055c3b1906","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/81a85b12132c8ffe98f5ddbdc185481790aeaa1b","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/a2cce54c1748216535dda02e185d07a084be837e","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/c85efe6e13743cac6ba4ccf144cb91f44c86231a","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/de7b309139f862a44379ecd96e93c9133c69f813","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/f14752d66056d0c7bffe5092130409417d3baa70","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html","source":"af854a3a-2127-422b-91ae-364da2661108"}]}}]}