CVE-2026-99019 (GCVE-0-2026-99019)

Vulnerability from cvelistv5 – Published: 2026-10-23 12:20 – Updated: 2026-10-30 12:40
VLAI
Title
scsi: ch: Do not keep references to data transfer element devices
Summary
In the Linux kernel, the following vulnerability has been resolved: scsi: ch: Do not keep references to data transfer element devices ch_readconfig() looks up the scsi_device of every data transfer element whose SCSI id the changer reports in READ ELEMENT STATUS, and stores it in ch->dt[]. scsi_device_lookup() takes a reference, and nothing ever drops it: ch_destroy() frees the array with kfree(). ch->dt[] is read nowhere else - it only supplies the vendor, model and revision printed in the same loop. Once such a drive is removed, its scsi_device can never be released. It stays on the host's device list at its address, so a new device there is refused by anything that walks the list - target_core_pscsi reports "scsi_device_get() failed for H:C:T:L" - and the low-level driver's module can no longer be unloaded. Only a reboot recovers. It shows with any changer that reports its drives' ids; with the mhvtl virtual library (IBM 3573-TL personality), each create and remove of a library with four drives leaves four references behind, counted by the module's use count in lsmod. With ch not bound the count is unchanged, and with this patch applied it is unchanged too. Drop the reference as soon as the name has been printed, and remove the now unused dt[] array. That also removes the array leaked when ch_probe() fails after ch_readconfig(). The same leak was reported with an RFC patch in 2022, which was not merged.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6637 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: daa6eda65a53e5addf86c6bc829129ff51b08bda , < 7412c6fb671dda9776deebb283daf0bb2f1b48e5 (git)
Affected: daa6eda65a53e5addf86c6bc829129ff51b08bda , < 03287b176e8f7cc5680a7053e2d53bd5cb05d80c (git)
Affected: daa6eda65a53e5addf86c6bc829129ff51b08bda , < 72ad7b08ffd5d9495715db0d74ce325a485f1b52 (git)
Affected: daa6eda65a53e5addf86c6bc829129ff51b08bda , < ec6ecab1b7577ae555ee6b81480814d123dd9ec0 (git)
Affected: daa6eda65a53e5addf86c6bc829129ff51b08bda , < cef2cedb6f7a394b278775b3d6ffb9b20ecd61db (git)
Affected: daa6eda65a53e5addf86c6bc829129ff51b08bda , < a34a230ccea1b8b667ae59dca11295a2c8f81738 (git)
Affected: daa6eda65a53e5addf86c6bc829129ff51b08bda , < 1d35a17f1c2ed4154731895694a1a3557f0da766 (git)
Affected: daa6eda65a53e5addf86c6bc829129ff51b08bda , < 27c0f718d3b3c99e6d315308e95d987d0382a8a8 (git)
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Linux Linux Affected: 2.6.13
Unaffected: 0 , < 2.6.13 (semver)
Unaffected: 5.10.273 , ≤ 5.10.* (semver)
Unaffected: 5.15.224 , ≤ 5.15.* (semver)
Unaffected: 6.1.191 , ≤ 6.1.* (semver)
Unaffected: 6.6.160 , ≤ 6.6.* (semver)
Unaffected: 6.12.114 , ≤ 6.12.* (semver)
Unaffected: 6.18.58 , ≤ 6.18.* (semver)
Unaffected: 7.2.11 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: ch: Do not keep references to data transfer element devices\n\nch_readconfig() looks up the scsi_device of every data transfer element\nwhose SCSI id the changer reports in READ ELEMENT STATUS, and stores it in\nch-\u003edt[]. scsi_device_lookup() takes a reference, and nothing ever drops\nit: ch_destroy() frees the array with kfree(). ch-\u003edt[] is read nowhere\nelse - it only supplies the vendor, model and revision printed in the same\nloop.\n\nOnce such a drive is removed, its scsi_device can never be released. It\nstays on the host\u0027s device list at its address, so a new device there is\nrefused by anything that walks the list - target_core_pscsi reports\n\"scsi_device_get() failed for H:C:T:L\" - and the low-level driver\u0027s module\ncan no longer be unloaded. Only a reboot recovers.\n\nIt shows with any changer that reports its drives\u0027 ids; with the mhvtl\nvirtual library (IBM 3573-TL personality), each create and remove of a\nlibrary with four drives leaves four references behind, counted by the\nmodule\u0027s use count in lsmod. With ch not bound the count is unchanged, and\nwith this patch applied it is unchanged too.\n\nDrop the reference as soon as the name has been printed, and remove the now\nunused dt[] array. That also removes the array leaked when ch_probe() fails\nafter ch_readconfig().\n\nThe same leak was reported with an RFC patch in 2022, which was not merged."
          }
        ],
        "id": "CVE-2026-99019",
        "lastModified": "2026-10-30T13:21:37.843",
        "metrics": {},
        "published": "2026-10-23T13:17:24.770",
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        "vulnStatus": "Received"
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      "cve": "CVE-2026-99019",
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      "product_status:known_not_affected": "278",
      "source": "Red Hat CSAF VEX",
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      "title": "kernel: kernel: Denial of Service via reference count leak in SCSI changer driver",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-99019.json",
      "version": "3"
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      "cve": "CVE-2026-99019",
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      "initial_release_date": "2026-10-27T17:58:18Z",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-99019",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/2026/cve-2026-99019.json",
      "version": "2"
    }
  }
}



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Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

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    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.