CVE-2024-35958

net: ena: Fix incorrect descriptor free behavior

State: Published
Severity: 7.8 High
Published: May 20, 2024
Updated: Oct 15, 2026
Reserved: May 17, 2024

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux
3.1	5.5 Medium	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	CISA-ADP

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	548c4940b9f1f527f81509468dd60b61418880b6 to before b26aa765f7437e1bbe8db4c1641b12bd5dd378f0Affected 548c4940b9f1f527f81509468dd60b61418880b6 to before fdfbf54d128ab6ab255db138488f9650485795a2Affected 548c4940b9f1f527f81509468dd60b61418880b6 to before 19ff8fed3338898b70b2aad831386c78564912e1Affected 548c4940b9f1f527f81509468dd60b61418880b6 to before 5c7f2240d9835a7823d87f7460d8eae9f4e504c7Affected 548c4940b9f1f527f81509468dd60b61418880b6 to before c31baa07f01307b7ae05f3ce32b89d8e2ba0cc1dAffected 548c4940b9f1f527f81509468dd60b61418880b6 to before bf02d9fe00632d22fa91d34749c7aacf397b6cdeAffected
LinuxLinux	5.6Affected before 5.6Not affected 5.10.216 through 5.10.Not affected 5.15.156 through 5.15.Not affected 6.1.87 through 6.1.Not affected 6.6.28 through 6.6.Not affected 6.8.7 through 6.8.*Not affected 6.9 and laterNot affected

Product

Versions

LinuxLinux

548c4940b9f1f527f81509468dd60b61418880b6 to before b26aa765f7437e1bbe8db4c1641b12bd5dd378f0Affected
548c4940b9f1f527f81509468dd60b61418880b6 to before fdfbf54d128ab6ab255db138488f9650485795a2Affected
548c4940b9f1f527f81509468dd60b61418880b6 to before 19ff8fed3338898b70b2aad831386c78564912e1Affected
548c4940b9f1f527f81509468dd60b61418880b6 to before 5c7f2240d9835a7823d87f7460d8eae9f4e504c7Affected
548c4940b9f1f527f81509468dd60b61418880b6 to before c31baa07f01307b7ae05f3ce32b89d8e2ba0cc1dAffected
548c4940b9f1f527f81509468dd60b61418880b6 to before bf02d9fe00632d22fa91d34749c7aacf397b6cdeAffected

LinuxLinux

5.6Affected
before 5.6Not affected
5.10.216 through 5.10.*Not affected
5.15.156 through 5.15.*Not affected
6.1.87 through 6.1.*Not affected
6.6.28 through 6.6.*Not affected
6.8.7 through 6.8.*Not affected
6.9 and laterNot affected

References

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