CVE-2022-49820 (GCVE-0-2022-49820)

Vulnerability from cvelistv5 – Published: 2025-05-01 14:09 – Updated: 2026-05-11 19:07
VLAI
Title
mctp i2c: don't count unused / invalid keys for flow release
Summary
In the Linux kernel, the following vulnerability has been resolved: mctp i2c: don't count unused / invalid keys for flow release We're currently hitting the WARN_ON in mctp_i2c_flow_release: if (midev->release_count > midev->i2c_lock_count) { WARN_ONCE(1, "release count overflow"); This may be hit if we expire a flow before sending the first packet it contains - as we will not be pairing the increment of release_count (performed on flow release) with the i2c lock operation (only performed on actual TX). To fix this, only release a flow if we've encountered it previously (ie, dev_flow_state does not indicate NEW), as we will mark the flow as ACTIVE at the same time as accounting for the i2c lock operation. We also need to add an INVALID flow state, to indicate when we've done the release.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: f5b8abf9fc3dacd7529d363e26fe8230935d65f8 , < a5915a9a3ab4067ef8996a57738d156eabeb3a12 (git)
Affected: f5b8abf9fc3dacd7529d363e26fe8230935d65f8 , < 9cbd48d5fa14e4c65f8580de16686077f7cea02b (git)
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Linux Linux Affected: 5.18
Unaffected: 0 , < 5.18 (semver)
Unaffected: 6.0.10 , ≤ 6.0.* (semver)
Unaffected: 6.1 , ≤ * (original_commit_for_fix)
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    "redhat_vex": {
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      "cve": "CVE-2022-49820",
      "id": "CVE-2022-49820",
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      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
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      "title": "kernel: mctp i2c: don\u0027t count unused / invalid keys for flow release",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-49820.json",
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}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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