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CVE-2022-49786

blk-cgroup: properly pin the parent in blkcg_css_online

Description

In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: properly pin the parent in blkcg_css_online blkcg_css_online is supposed to pin the blkcg of the parent, but 397c9f46ee4d refactored things and along the way, changed it to pin the css instead. This results in extra pins, and we end up leaking blkcgs and cgroups.

Timeline

  1. ID reserved

    By Linux

  2. Published

  3. · 18 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-2022-49786, 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)
0.17% · top 94% of all CVEs (12 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 397c9f46ee4d99024c64954b007c1b5762d01cb4 – < d118247e404d6338f7b90636a3c6b95a387ed163
    • affected 397c9f46ee4d99024c64954b007c1b5762d01cb4 – < d7dbd43f4a828fa1d9a8614d5b0ac40aee6375fe

  • Linux · Linux

    • affected 5.19
    • unaffected < 5.19
    • unaffected 6.0.10 – ≤ 6.0.*
    • unaffected 6.1 – ≤ *

References

References2

Sources

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

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Record last updated .