CVE-2022-49273

Summary

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

rtc: pl031: fix rtc features null pointer dereference

When there is no interrupt line, rtc alarm feature is disabled.

The clearing of the alarm feature bit was being done prior to allocations of ldata->rtc device, resulting in a null pointer dereference.

Clear RTC_FEATURE_ALARM after the rtc device is allocated.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxd9b0dd54a1943f47a381a474f8ea2c94466110c0 < cd2722e411e8ab7e5ae41102f6925fa13dffdac5affected
LinuxLinuxd9b0dd54a1943f47a381a474f8ea2c94466110c0 < d274ce4a3dfd0b9a292667535578359b865765cbaffected
LinuxLinuxd9b0dd54a1943f47a381a474f8ea2c94466110c0 < 1b915703964f7e636961df04c540261dc55c6c70affected
LinuxLinuxd9b0dd54a1943f47a381a474f8ea2c94466110c0 < ea6af39f3da50c86367a71eb3cc674ade3ed244caffected
LinuxLinux5.12affected
LinuxLinux0 < 5.12unaffected
LinuxLinux5.15.33 <= 5.15.*unaffected
LinuxLinux5.16.19 <= 5.16.*unaffected
LinuxLinux5.17.2 <= 5.17.*unaffected
LinuxLinux5.18 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

References