CVE-2021-47401

Summary

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

ipack: ipoctal: fix stack information leak

The tty driver name is used also after registering the driver and must specifically not be allocated on the stack to avoid leaking information to user space (or triggering an oops).

Drivers should not try to encode topology information in the tty device name but this one snuck in through staging without anyone noticing and another driver has since copied this malpractice.

Fixing the ABI is a separate issue, but this at least plugs the security hole.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxba4dc61fe8c545a5d6a68b63616776556b771f51 < acb96e782bad427ca4bb1bd94af660acd1462380affected
LinuxLinuxba4dc61fe8c545a5d6a68b63616776556b771f51 < 741ea2670e021350e54f491106bdaa22dc50e6a0affected
LinuxLinuxba4dc61fe8c545a5d6a68b63616776556b771f51 < 2725925982dc96a78069cd118ea3d66759bfdad7affected
LinuxLinuxba4dc61fe8c545a5d6a68b63616776556b771f51 < 829f13d6079cf7a2465522f39acb43033e9b320daffected
LinuxLinuxba4dc61fe8c545a5d6a68b63616776556b771f51 < 8657158a3b68c85234e6da3d8eae33d6183588b7affected
LinuxLinuxba4dc61fe8c545a5d6a68b63616776556b771f51 < 5f6a309a699675680df15d9b6d389114515b4426affected
LinuxLinuxba4dc61fe8c545a5d6a68b63616776556b771f51 < 0a9c36a2e06a249acbed64e8e0b84637c2ad7575affected
LinuxLinuxba4dc61fe8c545a5d6a68b63616776556b771f51 < a89936cce87d60766a75732a9e7e25c51164f47caffected
LinuxLinux3.5affected
LinuxLinux0 < 3.5unaffected
LinuxLinux4.4.286 <= 4.4.*unaffected
LinuxLinux4.9.285 <= 4.9.*unaffected
LinuxLinux4.14.249 <= 4.14.*unaffected
LinuxLinux4.19.209 <= 4.19.*unaffected
LinuxLinux5.4.151 <= 5.4.*unaffected
LinuxLinux5.10.71 <= 5.10.*unaffected
LinuxLinux5.14.10 <= 5.14.*unaffected
LinuxLinux5.15 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

CVE Program Container

Additional References

References