CVE-2021-47172

Summary

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

iio: adc: ad7124: Fix potential overflow due to non sequential channel numbers

Channel numbering must start at 0 and then not have any holes, or it is possible to overflow the available storage. Note this bug was introduced as part of a fix to ensure we didn't rely on the ordering of child nodes. So we need to support arbitrary ordering but they all need to be there somewhere.

Note I hit this when using qemu to test the rest of this series. Arguably this isn't the best fix, but it is probably the most minimal option for backporting etc.

Alexandru's sign-off is here because he carried this patch in a larger set that Jonathan then applied.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux5408cbc6337300d6f1a87c797273c535ed96305a < f49149964d2423fb618fb6b755bb1eaa431cca2caffected
LinuxLinuxd7857e4ee1ba69732b16c73b2f2dde83ecd78ee4 < f70122825076117787b91e7f219e21c09f11a5b9affected
LinuxLinuxd7857e4ee1ba69732b16c73b2f2dde83ecd78ee4 < 26da8040eccc6c6b0e415e9a3baf72fd39eb2fdcaffected
LinuxLinuxd7857e4ee1ba69732b16c73b2f2dde83ecd78ee4 < f2a772c51206b0c3f262e4f6a3812c89a650191baffected
LinuxLinux5.4.14 < 5.4.124affected
LinuxLinux5.5affected
LinuxLinux0 < 5.5unaffected
LinuxLinux5.4.124 <= 5.4.*unaffected
LinuxLinux5.10.42 <= 5.10.*unaffected
LinuxLinux5.12.9 <= 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