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CVE-2026-461538021q: delete cleared egress QoS mappings

Description

In the Linux kernel, the following vulnerability has been resolved: 8021q: delete cleared egress QoS mappings vlan_dev_set_egress_priority() currently keeps cleared egress priority mappings in the hash as tombstones. Repeated set/clear cycles with distinct skb priorities therefore accumulate mapping nodes until device teardown and leak memory. Delete mappings when vlan_prio is cleared instead of keeping tombstones. Now that the egress mapping lists are RCU protected, the node can be unlinked safely and freed after a grace period.

Timeline

  1. ID reserved

    By Linux

  2. · 15 days later

    Published

  3. · 5 months 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-2026-46153, by who scored it
Scored byCVSSScoreVector
NVDNVD · Analyzed3.1Medium5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS (exploitation in 30 days)
0.11% · top 99% of all CVEs (14 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: Medium 5.5.

Affected products

  • Linux · Linux

    • affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < a52e122c9e4d56ad9a03b32c915a199276d989c3
    • affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 7dddc74af369478ba7f9bc136d0fc1dc4570cb66

  • Linux · Linux

    • affected 2.6.12
    • unaffected < 2.6.12
    • unaffected 7.0.7 – ≤ 7.0.*
    • unaffected 7.1 – ≤ *

References

References2

Sources

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

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Record last updated .