CVE-2022-48637

Summary

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

bnxt: prevent skb UAF after handing over to PTP worker

When reading the timestamp is required bnxt_tx_int() hands over the ownership of the completed skb to the PTP worker. The skb should not be used afterwards, as the worker may run before the rest of our code and free the skb, leading to a use-after-free.

Since dev_kfree_skb_any() accepts NULL make the loss of ownership more obvious and set skb to NULL.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux83bb623c968e7351aee5111547693f95f330dc5a < 08483e4c0c83b221b8891434a04cec405dee94a6affected
LinuxLinux83bb623c968e7351aee5111547693f95f330dc5a < 32afa1f23e42cc635ccf4c39f24514d03d1e8338affected
LinuxLinux83bb623c968e7351aee5111547693f95f330dc5a < c31f26c8f69f776759cbbdfb38e40ea91aa0dd65affected
LinuxLinux5.14affected
LinuxLinux0 < 5.14unaffected
LinuxLinux5.15.71 <= 5.15.*unaffected
LinuxLinux5.19.12 <= 5.19.*unaffected
LinuxLinux6.0 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

CVE Program Container

Additional References

References