CVE-2026-45978 (GCVE-0-2026-45978)

Vulnerability from cvelistv5 – Published: 2026-05-27 12:18 – Updated: 2026-05-27 12:18
VLAI
Title
staging: greybus: lights: avoid NULL deref
Summary
In the Linux kernel, the following vulnerability has been resolved: staging: greybus: lights: avoid NULL deref gb_lights_light_config() stores channel_count before allocating the channels array. If kcalloc() fails, gb_lights_release() iterates the non-zero count and dereferences light->channels, which is NULL. Allocate channels first and only then publish channels_count so the cleanup path can't walk a NULL pointer.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 2870b52bae4c81823ffcb3ed2b0626fb39d64f48 , < a118724d7641b832fa14323e2733e28ae4834552 (git)
Affected: 2870b52bae4c81823ffcb3ed2b0626fb39d64f48 , < 3cbe694d235d96f628ec7dc6ae4d8bdddb768699 (git)
Affected: 2870b52bae4c81823ffcb3ed2b0626fb39d64f48 , < ba5022162da63059bae36c4fd84d7031f582c71f (git)
Affected: 2870b52bae4c81823ffcb3ed2b0626fb39d64f48 , < 65f2c608096d766540953d9b170d216aa3b5eb95 (git)
Affected: 2870b52bae4c81823ffcb3ed2b0626fb39d64f48 , < 01b91cb3e748032fd96bbe0043812b426a52f091 (git)
Affected: 2870b52bae4c81823ffcb3ed2b0626fb39d64f48 , < 06162d85f830582da6e9e5fcf9c9504d6da9ae0b (git)
Affected: 2870b52bae4c81823ffcb3ed2b0626fb39d64f48 , < da46264a7016034a5bbbad034c012ef218b7d0af (git)
Affected: 2870b52bae4c81823ffcb3ed2b0626fb39d64f48 , < efcffd9a6ad8d190651498d5eda53bfc7cf683a7 (git)
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Linux Linux Affected: 4.9
Unaffected: 0 , < 4.9 (semver)
Unaffected: 5.10.252 , ≤ 5.10.* (semver)
Unaffected: 5.15.202 , ≤ 5.15.* (semver)
Unaffected: 6.1.165 , ≤ 6.1.* (semver)
Unaffected: 6.6.128 , ≤ 6.6.* (semver)
Unaffected: 6.12.75 , ≤ 6.12.* (semver)
Unaffected: 6.18.14 , ≤ 6.18.* (semver)
Unaffected: 6.19.4 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/staging/greybus/light.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.9"
            },
            {
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "5.10.252",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.202",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.165",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.128",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.75",
              "versionType": "semver"
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            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.14",
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            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
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                  "versionStartIncluding": "4.9",
                  "vulnerable": true
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              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nstaging: greybus: lights: avoid NULL deref\n\ngb_lights_light_config() stores channel_count before allocating the\nchannels array. If kcalloc() fails, gb_lights_release() iterates the\nnon-zero count and dereferences light-\u003echannels, which is NULL.\n\nAllocate channels first and only then publish channels_count so the\ncleanup path can\u0027t walk a NULL pointer."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-27T12:18:36.753Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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          "url": "https://git.kernel.org/stable/c/a118724d7641b832fa14323e2733e28ae4834552"
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      "title": "staging: greybus: lights: avoid NULL deref",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-45978",
    "datePublished": "2026-05-27T12:18:36.753Z",
    "dateReserved": "2026-05-13T15:03:33.090Z",
    "dateUpdated": "2026-05-27T12:18:36.753Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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      "cve": "CVE-2026-45978",
      "date": "2026-05-29",
      "epss": "0.00024",
      "percentile": "0.07393"
    },
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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.


Detection rules are retrieved from Rulezet.