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CVE-2025-38539

tracing: Add down_write(trace_event_sem) when adding trace event

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.4.297, 5.10.241, 5.15.190, 6.1.147, 6.6.100, and 2 more
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: no
  • Technical impact: total

Summary

In the Linux kernel, the following vulnerability has been resolved: tracing: Add down_write(trace_event_sem) when adding trace event When a module is loaded, it adds trace events defined by the module. It may also need to modify the modules trace printk formats to replace enum names with their values. If two modules are loaded at the same time, the adding of the event to the ftrace_events list can corrupt the walking of the list in the code that is modifying the printk format strings and crash the kernel. The addition of the event should take the trace_event_sem for write while it adds the new event. Also add a lockdep_assert_held() on that semaphore in __trace_add_event_dirs() as it iterates the list.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: no · Technical impact: total

  3. Record last updated

Affected versions

  • Linux Linux

    From 110bf2b764eb6026b868d84499263cb24b1bcc8d · fixed in e70f5ee4c8824736332351b703c46f9469ed7f6c; From 110bf2b764eb6026b868d84499263cb24b1bcc8d · fixed in db45632479ceecb669612ed8dbce927e3c6279fc; From 110bf2b764eb6026b868d84499263cb24b1bcc8d · fixed in ca60064ea03f14e06c763de018403cb56ba3207d; From 110bf2b764eb6026b868d84499263cb24b1bcc8d · fixed in 7803b28c9aa8d8bd4e19ebcf5f0db9612b0f333b; From 110bf2b764eb6026b868d84499263cb24b1bcc8d · fixed in 6bc94f20a4c304997288f9a45278c9d0c06987d3; From 110bf2b764eb6026b868d84499263cb24b1bcc8d · fixed in 33e20747b47ddc03569b6bc27a2d6894c1428182; From 110bf2b764eb6026b868d84499263cb24b1bcc8d · fixed in 70fecd519caad0c1741c3379d5348c9000a5b29d; From 110bf2b764eb6026b868d84499263cb24b1bcc8d · fixed in b5e8acc14dcb314a9b61ff19dcd9fdd0d88f70df

  • Linux Linux

    2.6.31

  • KernelLinux

    From 2.6.31 · fixed in 5.4.297; From 5.5.0 · fixed in 5.10.241; From 5.11.0 · fixed in 5.15.190; From 5.16.0 · fixed in 6.1.147; From 6.2.0 · fixed in 6.6.100; From 6.7.0 · fixed in 6.12.40; From 6.13.0 · fixed in 6.15.8

References 8

git.kernel.org