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CVE-2024-39293

Revert "xsk: Support redirect to any socket bound to the same umem"

Description

In the Linux kernel, the following vulnerability has been resolved: Revert "xsk: Support redirect to any socket bound to the same umem" This reverts commit 2863d665ea41282379f108e4da6c8a2366ba66db. This patch introduced a potential kernel crash when multiple napi instances redirect to the same AF_XDP socket. By removing the queue_index check, it is possible for multiple napi instances to access the Rx ring at the same time, which will result in a corrupted ring state which can lead to a crash when flushing the rings in __xsk_flush(). This can happen when the linked list of sockets to flush gets corrupted by concurrent accesses. A quick and small fix is not possible, so let us revert this for now.

Timeline

  1. ID reserved

    By Linux

  2. · 1 day later

    Published

  3. · 2 years later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2024-39293, by who scored it
Scored byCVSSScoreVector
LinuxCNA (assigner)3.1Critical9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVDNVD · Modified3.1Medium4.7CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS (exploitation in 30 days)
0.31% · top 75% of all CVEs (11 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.

Affected products

  • Linux · Linux

    • affected 2863d665ea41282379f108e4da6c8a2366ba66db – < 19cb40b1064566ea09538289bfcf5bc7ecb9b6f5
    • affected 2863d665ea41282379f108e4da6c8a2366ba66db – < 7fcf26b315bbb728036da0862de6b335da83dff2

  • Linux · Linux

    • affected 6.9
    • unaffected < 6.9
    • unaffected 6.9.5 – ≤ 6.9.*
    • unaffected 6.10 – ≤ *

References

References2

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .