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CVE-2022-49612 (GCVE-0-2022-49612)

Vulnerability from cvelistv5 – Published: 2025-02-26 02:23 – Updated: 2026-05-11 19:03
VLAI
Title
power: supply: core: Fix boundary conditions in interpolation
Summary
In the Linux kernel, the following vulnerability has been resolved: power: supply: core: Fix boundary conditions in interpolation The functions power_supply_temp2resist_simple and power_supply_ocv2cap_simple handle boundary conditions incorrectly. The change was introduced in a4585ba2050f460f749bbaf2b67bd56c41e30283 ("power: supply: core: Use library interpolation"). There are two issues: First, the lines "high = i - 1" and "high = i" in ocv2cap have the wrong order compared to temp2resist. As a consequence, ocv2cap sets high=-1 if ocv>table[0].ocv, which causes an out-of-bounds read. Second, the logic of temp2resist is also not correct. Consider the case table[] = {{20, 100}, {10, 80}, {0, 60}}. For temp=5, we expect a resistance of 70% by interpolation. However, temp2resist sets high=low=2 and returns 60.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: a4585ba2050f460f749bbaf2b67bd56c41e30283 , < a762cee5d933fe4e2e1b773d60fc74fb8248d8c4 (git)
Affected: a4585ba2050f460f749bbaf2b67bd56c41e30283 , < 093d27bb6f2d1963f927ef59c9a2d37059175426 (git)
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Linux Linux Affected: 5.17
Unaffected: 0 , < 5.17 (semver)
Unaffected: 5.18.13 , ≤ 5.18.* (semver)
Unaffected: 5.19 , ≤ * (original_commit_for_fix)
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-29T21:13:14+00:00",
      "cve": "CVE-2022-49612",
      "id": "CVE-2022-49612",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:fixed": "201",
      "product_status:known_affected": "54",
      "product_status:known_not_affected": "134",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: power: supply: core: Fix boundary conditions in interpolation",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-49612.json",
      "version": "3"
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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.

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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.


Detection rules are retrieved from Rulezet.


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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.