FKIE_CVE-2026-89871

Vulnerability from fkie_nvd - Published: 2026-09-16 11:16 - Updated: 2026-09-16 11:16
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: media: video-i2c: fix kthread error pointer left in kthread_vid_cap on failure kthread_run() returns an ERR_PTR on failure, not NULL. When start_streaming() fails, data->kthread_vid_cap is left holding this error pointer instead of being cleared. This causes two subsequent bugs: 1. A future call to start_streaming() sees a non-NULL kthread_vid_cap and returns 0 (success) immediately, without actually starting the capture thread. 2. A call to stop_streaming() checks 'kthread_vid_cap == NULL' which is false for an error pointer, and proceeds to call kthread_stop() on the error pointer, leading to a kernel crash. Fix this by resetting kthread_vid_cap to NULL on failure before jumping to the error path.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0e7f2cd72a4f9268ee09a13b13f3339e7cc71557
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0fac63cac6689588da530764ccb6ba55ee8e4d8b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3d1b10d81fe54852ed953f4129577b733bbd6907
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/52fd9d80c0cea7bf09e7ee36cad316e5c39b7fe6
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5c35d380bea60503c4fe0986fe1de6a3263282b3
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/76e379754ba618989f6215be608d5c04774a611d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/968c5213e34c48d35febdfd09cf3dc58ad039140
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/db0f4531aa55cfb0171684ebfffe3ff04b79d5a8
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/media/i2c/video-i2c.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "db0f4531aa55cfb0171684ebfffe3ff04b79d5a8",
              "status": "affected",
              "version": "5cebaac609744414463d1ecc28fdecd26c1b9bc1",
              "versionType": "git"
            },
            {
              "lessThan": "0fac63cac6689588da530764ccb6ba55ee8e4d8b",
              "status": "affected",
              "version": "5cebaac609744414463d1ecc28fdecd26c1b9bc1",
              "versionType": "git"
            },
            {
              "lessThan": "5c35d380bea60503c4fe0986fe1de6a3263282b3",
              "status": "affected",
              "version": "5cebaac609744414463d1ecc28fdecd26c1b9bc1",
              "versionType": "git"
            },
            {
              "lessThan": "3d1b10d81fe54852ed953f4129577b733bbd6907",
              "status": "affected",
              "version": "5cebaac609744414463d1ecc28fdecd26c1b9bc1",
              "versionType": "git"
            },
            {
              "lessThan": "968c5213e34c48d35febdfd09cf3dc58ad039140",
              "status": "affected",
              "version": "5cebaac609744414463d1ecc28fdecd26c1b9bc1",
              "versionType": "git"
            },
            {
              "lessThan": "52fd9d80c0cea7bf09e7ee36cad316e5c39b7fe6",
              "status": "affected",
              "version": "5cebaac609744414463d1ecc28fdecd26c1b9bc1",
              "versionType": "git"
            },
            {
              "lessThan": "0e7f2cd72a4f9268ee09a13b13f3339e7cc71557",
              "status": "affected",
              "version": "5cebaac609744414463d1ecc28fdecd26c1b9bc1",
              "versionType": "git"
            },
            {
              "lessThan": "76e379754ba618989f6215be608d5c04774a611d",
              "status": "affected",
              "version": "5cebaac609744414463d1ecc28fdecd26c1b9bc1",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/media/i2c/video-i2c.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.18"
            },
            {
              "lessThan": "4.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.270",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.51",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: video-i2c: fix kthread error pointer left in kthread_vid_cap on failure\n\nkthread_run() returns an ERR_PTR on failure, not NULL.\nWhen start_streaming() fails, data-\u003ekthread_vid_cap is left holding\nthis error pointer instead of being cleared.\n\nThis causes two subsequent bugs:\n1. A future call to start_streaming() sees a non-NULL kthread_vid_cap\n   and returns 0 (success) immediately, without actually starting the\n   capture thread.\n2. A call to stop_streaming() checks \u0027kthread_vid_cap == NULL\u0027 which\n   is false for an error pointer, and proceeds to call kthread_stop()\n   on the error pointer, leading to a kernel crash.\n\nFix this by resetting kthread_vid_cap to NULL on failure before\njumping to the error path."
    }
  ],
  "id": "CVE-2026-89871",
  "lastModified": "2026-09-16T11:16:55.287",
  "metrics": {},
  "published": "2026-09-16T11:16:55.287",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0e7f2cd72a4f9268ee09a13b13f3339e7cc71557"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0fac63cac6689588da530764ccb6ba55ee8e4d8b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3d1b10d81fe54852ed953f4129577b733bbd6907"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/52fd9d80c0cea7bf09e7ee36cad316e5c39b7fe6"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5c35d380bea60503c4fe0986fe1de6a3263282b3"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/76e379754ba618989f6215be608d5c04774a611d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/968c5213e34c48d35febdfd09cf3dc58ad039140"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/db0f4531aa55cfb0171684ebfffe3ff04b79d5a8"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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

Author Source Type Date Other

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.



Related by attack behaviour

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.