cbcvebase.
CVE-2025-22035
published 2025-04-16

CVE-2025-22035: In the Linux kernel, the following vulnerability has been resolved: tracing: Fix use-after-free in print_graph_function_flags during tracer switching Kairui…

PriorityP340high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.25%
15.9th percentile
In the Linux kernel, the following vulnerability has been resolved: tracing: Fix use-after-free in print_graph_function_flags during tracer switching Kairui reported a UAF issue in print_graph_function_flags() during ftrace stress testing [1]. This issue can be reproduced if puting a 'mdelay(10)' after 'mutex_unlock(&trace_types_lock)' in s_start(), and executing the following script: $ echo function_graph > current_tracer $ cat trace > /dev/null & $ sleep 5 # Ensure the 'cat' reaches the 'mdelay(10)' point $ echo timerlat > current_tracer The root cause lies in the two calls to print_graph_function_flags within print_trace_line during each s_show(): * One through 'iter->trace->print_line()'; * Another through 'event->funcs->trace()', which is hidden in print_trace_fmt() before print_trace_line returns. Tracer switching only updates the former, while the latter continues to use the print_line function of the old tracer, which in the script above is print_graph_function_flags. Moreover, when switching from the 'function_graph' tracer to the 'timerlat' tracer, s_start only calls graph_trace_close of the 'function_graph' tracer to free 'iter->private', but does not set it to NULL. This provides an opportunity for 'event->funcs->trace()' to use an invalid 'iter->private'. To fix this issue, set 'iter->private' to NULL immediately after freeing it in graph_trace_close(), ensuring that an invalid pointer is not passed to other tracers. Additionally, clean up the unnecessary 'iter->private = NULL' during each 'cat trace' when using wakeup and irqsoff tracers. [1] https://lore.kernel.org/all/[email protected]/

Affected

45 ranges· showing 25
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.135-1 (bookworm)linux 6.1.135-1 (bookworm)
debianlinux-6.1< linux 6.1.135-1 (bookworm)linux 6.1.135-1 (bookworm)
linuxlinux
linuxlinux
linuxlinux
linuxlinux
linuxlinux>= 05319d707732c728eb721ac616a50e7978eb499a < 42561fe62c3628ea3bc9623f64f047605e98857f42561fe62c3628ea3bc9623f64f047605e98857f
linuxlinux>= 2cb0c037c927db4ec928cc927488e52aa359786e < a2cce54c1748216535dda02e185d07a084be837ea2cce54c1748216535dda02e185d07a084be837e
linuxlinux>= 4.14.324 < 4.154.15
linuxlinux>= 4.19.293 < 4.204.20
linuxlinux>= 5.10.193 < 5.10.2365.10.236
linuxlinux>= 5.15.129 < 5.15.1805.15.180
linuxlinux>= 5.4.255 < 5.4.2925.4.292
linuxlinux>= 6.1.50 < 6.1.1346.1.134
linuxlinux>= 6.4.13 < 6.56.5
linuxlinux>= b8205dfed68183dc1470e83863c5ded6d7fa30a9 < de7b309139f862a44379ecd96e93c9133c69f813de7b309139f862a44379ecd96e93c9133c69f813
linuxlinux>= ce6e2b14bc094866d9173db6935da2d752f06d8b < 81a85b12132c8ffe98f5ddbdc185481790aeaa1b81a85b12132c8ffe98f5ddbdc185481790aeaa1b
linuxlinux>= eecb91b9f98d6427d4af5fdb8f108f52572a39e7 < 099ef3385800828b74933a96c117574637c3fb3a099ef3385800828b74933a96c117574637c3fb3a
linuxlinux>= eecb91b9f98d6427d4af5fdb8f108f52572a39e7 < c85efe6e13743cac6ba4ccf144cb91f44c86231ac85efe6e13743cac6ba4ccf144cb91f44c86231a
linuxlinux>= eecb91b9f98d6427d4af5fdb8f108f52572a39e7 < f14752d66056d0c7bffe5092130409417d3baa70f14752d66056d0c7bffe5092130409417d3baa70
linuxlinux>= eecb91b9f98d6427d4af5fdb8f108f52572a39e7 < 70be951bc01e4a0e10d443f3510bb17426f257fb70be951bc01e4a0e10d443f3510bb17426f257fb
linuxlinux>= eecb91b9f98d6427d4af5fdb8f108f52572a39e7 < 7f81f27b1093e4895e87b74143c59c055c3b19067f81f27b1093e4895e87b74143c59c055c3b1906
linuxlinux_kernel>= 0 < 5.10.237-15.10.237-1
linuxlinux_kernel>= 0 < 6.1.135-16.1.135-1
linuxlinux_kernel>= 0 < 6.12.25-16.12.25-1

CVSS provenance

nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
osv8.8HIGH
vendor_ubuntu8.8HIGH
vendor_debian7.8HIGH
vendor_msrc7.8HIGH
vendor_redhat7.8HIGH
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