CVE-2024-38618

Summary

In the Linux kernel, the following vulnerability has been resolved:

ALSA: timer: Set lower bound of start tick time

Currently ALSA timer doesn't have the lower limit of the start tick time, and it allows a very small size, e.g. 1 tick with 1ns resolution for hrtimer. Such a situation may lead to an unexpected RCU stall, where the callback repeatedly queuing the expire update, as reported by fuzzer.

This patch introduces a sanity check of the timer start tick time, so that the system returns an error when a too small start size is set. As of this patch, the lower limit is hard-coded to 100us, which is small enough but can still work somehow.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxbbaf5e97337287479eb78dbc3822d9560bbfd2e2 < 68396c825c43664b20a3a1ba546844deb2b4e48faffected
LinuxLinuxbbaf5e97337287479eb78dbc3822d9560bbfd2e2 < 74bfb8d90f2601718ae203faf45a196844c01fa1affected
LinuxLinuxbbaf5e97337287479eb78dbc3822d9560bbfd2e2 < bdd0aa055b8ec7e24bbc19513f3231958741d0abaffected
LinuxLinuxbbaf5e97337287479eb78dbc3822d9560bbfd2e2 < 83f0ba8592b9e258fd80ac6486510ab1dcd7ad6eaffected
LinuxLinuxbbaf5e97337287479eb78dbc3822d9560bbfd2e2 < ceab795a67dd28dd942d0d8bba648c6c0f7a044baffected
LinuxLinuxbbaf5e97337287479eb78dbc3822d9560bbfd2e2 < 2c95241ac5fc90c929d6c0c023e84bf0d30e84c3affected
LinuxLinuxbbaf5e97337287479eb78dbc3822d9560bbfd2e2 < abb1ad69d98cf1ff25bb14fff0e7c3f66239e1cdaffected
LinuxLinuxbbaf5e97337287479eb78dbc3822d9560bbfd2e2 < 4a63bd179fa8d3fcc44a0d9d71d941ddd62f0c4eaffected
LinuxLinux2.6.29affected
LinuxLinux0 < 2.6.29unaffected
LinuxLinux4.19.316 <= 4.19.*unaffected
LinuxLinux5.4.278 <= 5.4.*unaffected
LinuxLinux5.10.219 <= 5.10.*unaffected
LinuxLinux5.15.161 <= 5.15.*unaffected
LinuxLinux6.1.93 <= 6.1.*unaffected
LinuxLinux6.6.33 <= 6.6.*unaffected
LinuxLinux6.9.3 <= 6.9.*unaffected
LinuxLinux6.10 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

CVE Program Container

Additional References

References