CVE-2024-26858

Summary

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

net/mlx5e: Use a memory barrier to enforce PTP WQ xmit submission tracking occurs after populating the metadata_map

Just simply reordering the functions mlx5e_ptp_metadata_map_put and mlx5e_ptpsq_track_metadata in the mlx5e_txwqe_complete context is not good enough since both the compiler and CPU are free to reorder these two functions. If reordering does occur, the issue that was supposedly fixed by 7e3f3ba97e6c ("net/mlx5e: Track xmit submission to PTP WQ after populating metadata map") will be seen. This will lead to NULL pointer dereferences in mlx5e_ptpsq_mark_ts_cqes_undelivered in the NAPI polling context due to the tracking list being populated before the metadata map.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux4d510506b46504664eacf8a44a9e8f3e54c137b8 < d1f71615dbb305f14f3b756cce015d70d8667549affected
LinuxLinux7e3f3ba97e6cc6fce5bf62df2ca06c8e59040167 < 936ef086161ab89a7f38f7a0761d6a3063c3277eaffected
LinuxLinux7e3f3ba97e6cc6fce5bf62df2ca06c8e59040167 < b7cf07586c40f926063d4d09f7de28ff82f62b2aaffected
LinuxLinuxa9d6c0c5a6bd9ca88e964f8843ea41bc085de866affected
LinuxLinux6.6.3 < 6.6.22affected
LinuxLinux6.5.13 < 6.6affected
LinuxLinux6.7affected
LinuxLinux0 < 6.7unaffected
LinuxLinux6.6.22 <= 6.6.*unaffected
LinuxLinux6.7.10 <= 6.7.*unaffected
LinuxLinux6.8 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

CVE Program Container

Additional References

References