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CVE-2021-47367

virtio-net: fix pages leaking when building skb in big mode

Medium5.5EPSS 0.23%
Published
Updated
Reserved
Assigned by
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: virtio-net: fix pages leaking when building skb in big mode We try to use build_skb() if we had sufficient tailroom. But we forget to release the unused pages chained via private in big mode which will leak pages. Fixing this by release the pages after building the skb in big mode.

Scores

CVSS scores of CVE-2021-47367, by who scored it
Scored byCVSSScoreVector
CISA-ADPADP (enrichment)3.1Medium5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
NVDNVD · Analyzed3.1Medium5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
EPSS (exploitation in 30 days)
0.23% · top 87% of all CVEs (6 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.

Weakness

Affected products

  • Linux · Linux

    • affected fb32856b16ad9d5bcd75b76a274e2c515ac7b9d7 – < f020bb63b5d2e5576acadd10e158fe3b04af67ba
    • affected fb32856b16ad9d5bcd75b76a274e2c515ac7b9d7 – < afd92d82c9d715fb97565408755acad81573591a

  • Linux · Linux

    • affected 5.13
    • unaffected < 5.13
    • unaffected 5.14.9 – ≤ 5.14.*
    • unaffected 5.15 – ≤ *

References (2)

Sources

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

Badge for a README or a ticket

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Record last updated .