CVE-2024-35958

Summary

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

net: ena: Fix incorrect descriptor free behavior

ENA has two types of TX queues:

  • queues which only process TX packets arriving from the network stack
  • queues which only process TX packets forwarded to it by XDP_REDIRECT or XDP_TX instructions

The ena_free_tx_bufs() cycles through all descriptors in a TX queue and unmaps + frees every descriptor that hasn't been acknowledged yet by the device (uncompleted TX transactions). The function assumes that the processed TX queue is necessarily from the first category listed above and ends up using napi_consume_skb() for descriptors belonging to an XDP specific queue.

This patch solves a bug in which, in case of a VF reset, the descriptors aren't freed correctly, leading to crashes.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux548c4940b9f1f527f81509468dd60b61418880b6 < b26aa765f7437e1bbe8db4c1641b12bd5dd378f0affected
LinuxLinux548c4940b9f1f527f81509468dd60b61418880b6 < fdfbf54d128ab6ab255db138488f9650485795a2affected
LinuxLinux548c4940b9f1f527f81509468dd60b61418880b6 < 19ff8fed3338898b70b2aad831386c78564912e1affected
LinuxLinux548c4940b9f1f527f81509468dd60b61418880b6 < 5c7f2240d9835a7823d87f7460d8eae9f4e504c7affected
LinuxLinux548c4940b9f1f527f81509468dd60b61418880b6 < c31baa07f01307b7ae05f3ce32b89d8e2ba0cc1daffected
LinuxLinux548c4940b9f1f527f81509468dd60b61418880b6 < bf02d9fe00632d22fa91d34749c7aacf397b6cdeaffected
LinuxLinux5.6affected
LinuxLinux0 < 5.6unaffected
LinuxLinux5.10.216 <= 5.10.*unaffected
LinuxLinux5.15.156 <= 5.15.*unaffected
LinuxLinux6.1.87 <= 6.1.*unaffected
LinuxLinux6.6.28 <= 6.6.*unaffected
LinuxLinux6.8.7 <= 6.8.*unaffected
LinuxLinux6.9 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

CVE Program Container

Additional References

Additional References

References