CVE-2021-47016

Summary

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

m68k: mvme147,mvme16x: Don't wipe PCC timer config bits

Don't clear the timer 1 configuration bits when clearing the interrupt flag and counter overflow. As Michael reported, "This results in no timer interrupts being delivered after the first. Initialization then hangs in calibrate_delay as the jiffies counter is not updated."

On mvme16x, enable the timer after requesting the irq, consistent with mvme147.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux7529b90d051e4629884771ba2b1d3a87d2c6a9d7 < f6a90818a32058fca62cda3a2027a6a2364e1878affected
LinuxLinux7529b90d051e4629884771ba2b1d3a87d2c6a9d7 < 1dfb26df15fc7036a74221d43de7427f74293daeaffected
LinuxLinux7529b90d051e4629884771ba2b1d3a87d2c6a9d7 < 73fdeb612d25b5e105c219e05434285a45d23576affected
LinuxLinux7529b90d051e4629884771ba2b1d3a87d2c6a9d7 < 5d34225169346cab5145978d153b9ce90e9ace21affected
LinuxLinux7529b90d051e4629884771ba2b1d3a87d2c6a9d7 < 43262178c043032e7c42d00de44c818ba05f9967affected
LinuxLinux5.2affected
LinuxLinux0 < 5.2unaffected
LinuxLinux5.4.119 <= 5.4.*unaffected
LinuxLinux5.10.37 <= 5.10.*unaffected
LinuxLinux5.11.21 <= 5.11.*unaffected
LinuxLinux5.12.4 <= 5.12.*unaffected
LinuxLinux5.13 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

CVE Program Container

Additional References

References