Vulnerability-Lookup

CVE-2026-23253 (GCVE-0-2026-23253)

Vulnerability from cvelistv5 – Published: 2026-03-18 17:01 – Updated: 2026-08-05 12:20

Title

media: dvb-core: fix wrong reinitialization of ringbuffer on reopen

Summary

In the Linux kernel, the following vulnerability has been resolved: media: dvb-core: fix wrong reinitialization of ringbuffer on reopen dvb_dvr_open() calls dvb_ringbuffer_init() when a new reader opens the DVR device. dvb_ringbuffer_init() calls init_waitqueue_head(), which reinitializes the waitqueue list head to empty. Since dmxdev->dvr_buffer.queue is a shared waitqueue (all opens of the same DVR device share it), this orphans any existing waitqueue entries from io_uring poll or epoll, leaving them with stale prev/next pointers while the list head is reset to {self, self}. The waitqueue and spinlock in dvr_buffer are already properly initialized once in dvb_dmxdev_init(). The open path only needs to reset the buffer data pointer, size, and read/write positions. Replace the dvb_ringbuffer_init() call in dvb_dvr_open() with direct assignment of data/size and a call to dvb_ringbuffer_reset(), which properly resets pread, pwrite, and error with correct memory ordering without touching the waitqueue or spinlock.

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/527cfa8a3486b3555…
https://git.kernel.org/stable/c/fb378cf89be434ed1…
https://git.kernel.org/stable/c/f1e520ca2e83ece67…
https://git.kernel.org/stable/c/af050ab44fa1b1897…
https://git.kernel.org/stable/c/d71781bad59b1c9d6…
https://git.kernel.org/stable/c/cfd94642025e6f71c…
https://git.kernel.org/stable/c/32eb8e4adc207ef31…
https://git.kernel.org/stable/c/bfbc0b5b32a8f28ce…

Impacted products

2 products

Vendor	Product	Version	CPE status
Linux	Linux	Affected: 34731df288a5ffe4b0c396caf8cd24c6a710a222 , < 527cfa8a3486b3555c5c15e2f62be484a11398dc (git) Affected: 34731df288a5ffe4b0c396caf8cd24c6a710a222 , < fb378cf89be434ed1f10ab79cc4788fba8ae868d (git) Affected: 34731df288a5ffe4b0c396caf8cd24c6a710a222 , < f1e520ca2e83ece6731af6167c9e5e16931ecba0 (git) Affected: 34731df288a5ffe4b0c396caf8cd24c6a710a222 , < af050ab44fa1b1897a940d7d756e512232f5e5df (git) Affected: 34731df288a5ffe4b0c396caf8cd24c6a710a222 , < d71781bad59b1c9d60d7068004581f9bf19c0c9d (git) Affected: 34731df288a5ffe4b0c396caf8cd24c6a710a222 , < cfd94642025e6f71c8f754bdec0800ee95e4f3dd (git) Affected: 34731df288a5ffe4b0c396caf8cd24c6a710a222 , < 32eb8e4adc207ef31bc6e5ae56bab940b0176066 (git) Affected: 34731df288a5ffe4b0c396caf8cd24c6a710a222 , < bfbc0b5b32a8f28ce284add619bf226716a59bc0 (git)	guessed
Linux	Linux	Affected: 2.6.17 Unaffected: 0 , < 2.6.17 (semver) Unaffected: 5.10.253 , ≤ 5.10.* (semver) Unaffected: 5.15.203 , ≤ 5.15.* (semver) Unaffected: 6.1.167 , ≤ 6.1.* (semver) Unaffected: 6.6.130 , ≤ 6.6.* (semver) Unaffected: 6.12.77 , ≤ 6.12.* (semver) Unaffected: 6.18.17 , ≤ 6.18.* (semver) Unaffected: 6.19.7 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)	guessed

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          "programFiles": [
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              "status": "unaffected",
              "version": "5.15.203",
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              "status": "unaffected",
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              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.6.130",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.77",
              "versionType": "semver"
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              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.17",
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              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.7",
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              "status": "unaffected",
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            }
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        }
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        {
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: dvb-core: fix wrong reinitialization of ringbuffer on reopen\n\ndvb_dvr_open() calls dvb_ringbuffer_init() when a new reader opens the\nDVR device.  dvb_ringbuffer_init() calls init_waitqueue_head(), which\nreinitializes the waitqueue list head to empty.\n\nSince dmxdev-\u003edvr_buffer.queue is a shared waitqueue (all opens of the\nsame DVR device share it), this orphans any existing waitqueue entries\nfrom io_uring poll or epoll, leaving them with stale prev/next pointers\nwhile the list head is reset to {self, self}.\n\nThe waitqueue and spinlock in dvr_buffer are already properly\ninitialized once in dvb_dmxdev_init().  The open path only needs to\nreset the buffer data pointer, size, and read/write positions.\n\nReplace the dvb_ringbuffer_init() call in dvb_dvr_open() with direct\nassignment of data/size and a call to dvb_ringbuffer_reset(), which\nproperly resets pread, pwrite, and error with correct memory ordering\nwithout touching the waitqueue or spinlock."
        }
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerability is in the DVB DVR device driver, accessible via opening /dev/dvb/adapter*/dvr* character device files. This requires local system access.\nAC:L - The attacker controls both sides of the race \u2014 closing a DVR fd from one thread while reopening it from another. The attacker can reliably trigger the waitqueue reinitialization while stale entries exist.\nPR:L - DVB device files are typically accessible to local users (e.g., via \"video\" group membership). On Android phones, set-top boxes, and embedded media devices, the device user has access to DVB hardware. No elevated privileges are required.\nUI:N - No user interaction is needed. The attacker can open, poll, close, and reopen the DVR device entirely on their own.\nS:U - The vulnerability operates within the kernel\u0027s security authority. There is no crossing of security boundaries like VM escape or IOMMU bypass.\nC:H - The waitqueue list corruption creates orphaned entries with stale pointers, which is a use-after-free primitive. UAF gives the attacker control over freed memory contents, enabling arbitrary kernel memory reads.\nI:H - The list corruption from the orphaned waitqueue entries provides write primitives through stale prev/next pointer manipulation. This is a classic kernel list corruption that can be leveraged for arbitrary write and code execution via heap spraying.\nA:H - The stale list pointers will cause a kernel crash/oops when the orphaned wait_queue_entry is removed, as it dereferences corrupted prev/next pointers. This was confirmed by syzbot."
            }
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      ],
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        "dateUpdated": "2026-08-05T12:20:57.385Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/527cfa8a3486b3555c5c15e2f62be484a11398dc"
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          "url": "https://git.kernel.org/stable/c/fb378cf89be434ed1f10ab79cc4788fba8ae868d"
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        {
          "url": "https://git.kernel.org/stable/c/f1e520ca2e83ece6731af6167c9e5e16931ecba0"
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        {
          "url": "https://git.kernel.org/stable/c/af050ab44fa1b1897a940d7d756e512232f5e5df"
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        {
          "url": "https://git.kernel.org/stable/c/bfbc0b5b32a8f28ce284add619bf226716a59bc0"
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      "title": "media: dvb-core: fix wrong reinitialization of ringbuffer on reopen",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23253",
    "datePublished": "2026-03-18T17:01:44.126Z",
    "dateReserved": "2026-01-13T15:37:45.990Z",
    "dateUpdated": "2026-08-05T12:20:57.385Z",
    "state": "PUBLISHED"
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    "epss": {
      "cve": "CVE-2026-23253",
      "date": "2026-09-15",
      "epss": "0.00129",
      "percentile": "0.02918"
    },
    "microsoft_vex": {
      "current_release_date": "2026-03-27T14:38:22.000Z",
      "cve": "CVE-2026-23253",
      "id": "msrc_CVE-2026-23253",
      "initial_release_date": "2026-03-02T00:00:00.000Z",
      "product_status:fixed": "1",
      "product_status:known_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "media: dvb-core: fix wrong reinitialization of ringbuffer on reopen",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-23253.json",
      "version": "2"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-23253\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-03-18T18:16:23.383\",\"lastModified\":\"2026-06-17T10:21:11.537\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmedia: dvb-core: fix wrong reinitialization of ringbuffer on reopen\\n\\ndvb_dvr_open() calls dvb_ringbuffer_init() when a new reader opens the\\nDVR device.  dvb_ringbuffer_init() calls init_waitqueue_head(), which\\nreinitializes the waitqueue list head to empty.\\n\\nSince dmxdev-\u003edvr_buffer.queue is a shared waitqueue (all opens of the\\nsame DVR device share it), this orphans any existing waitqueue entries\\nfrom io_uring poll or epoll, leaving them with stale prev/next pointers\\nwhile the list head is reset to {self, self}.\\n\\nThe waitqueue and spinlock in dvr_buffer are already properly\\ninitialized once in dvb_dmxdev_init().  The open path only needs to\\nreset the buffer data pointer, size, and read/write positions.\\n\\nReplace the dvb_ringbuffer_init() call in dvb_dvr_open() with direct\\nassignment of data/size and a call to dvb_ringbuffer_reset(), which\\nproperly resets pread, pwrite, and error with correct memory ordering\\nwithout touching the waitqueue or spinlock.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\\n\\nmedia: dvb-core: corrige la reinicializaci\u00f3n incorrecta del b\u00fafer circular al reabrir\\n\\ndvb_dvr_open() llama a dvb_ringbuffer_init() cuando un nuevo lector abre el dispositivo DVR. dvb_ringbuffer_init() llama a init_waitqueue_head(), lo que reinicializa la cabecera de la lista de la cola de espera a vac\u00eda.\\n\\nDado que dmxdev-\u0026gt;dvr_buffer.queue es una cola de espera compartida (todas las aperturas del mismo dispositivo DVR la comparten), esto deja hu\u00e9rfanas las entradas existentes de la cola de espera de io_uring poll o epoll, dej\u00e1ndolas con punteros prev/next obsoletos mientras la cabecera de la lista se restablece a {self, self}.\\n\\nLa cola de espera y el spinlock en dvr_buffer ya est\u00e1n correctamente inicializados una vez en dvb_dmxdev_init(). La ruta de apertura solo necesita restablecer el puntero de datos del b\u00fafer, el tama\u00f1o y las posiciones de lectura/escritura.\\n\\nReemplace la llamada a dvb_ringbuffer_init() en dvb_dvr_open() con la asignaci\u00f3n directa de datos/tama\u00f1o y una llamada a dvb_ringbuffer_reset(), que restablece correctamente pread, pwrite y error con el ordenamiento de memoria correcto sin tocar la cola de espera o el 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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-03T14:40:09+00:00",
      "cve": "CVE-2026-23253",
      "id": "CVE-2026-23253",
      "initial_release_date": "2026-03-18T00:00:00+00:00",
      "product_status:known_affected": "76",
      "product_status:known_not_affected": "198",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Kernel: Denial of Service via DVB DVR ringbuffer reinitialization flaw",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23253.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-07-15T05:30:53Z",
      "cve": "CVE-2026-23253",
      "id": "CVE-2026-23253",
      "initial_release_date": "2026-03-19T00:27:07Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "215",
      "product_status:known_not_affected": "24",
      "product_status:recommended": "268",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-23253",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-23253.json",
      "version": "11"
    }
  }
}

FKIE_CVE-2026-23253

Vulnerability from fkie_nvd - Published: 2026-03-18 18:16 - Updated: 2026-06-17 10:21

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/32eb8e4adc207ef31bc6e5ae56bab940b0176066	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/527cfa8a3486b3555c5c15e2f62be484a11398dc	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/af050ab44fa1b1897a940d7d756e512232f5e5df	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/bfbc0b5b32a8f28ce284add619bf226716a59bc0	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/cfd94642025e6f71c8f754bdec0800ee95e4f3dd	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d71781bad59b1c9d60d7068004581f9bf19c0c9d	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f1e520ca2e83ece6731af6167c9e5e16931ecba0	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/fb378cf89be434ed1f10ab79cc4788fba8ae868d	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	7.0

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/media/dvb-core/dmxdev.c"
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              "status": "unaffected",
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: dvb-core: fix wrong reinitialization of ringbuffer on reopen\n\ndvb_dvr_open() calls dvb_ringbuffer_init() when a new reader opens the\nDVR device.  dvb_ringbuffer_init() calls init_waitqueue_head(), which\nreinitializes the waitqueue list head to empty.\n\nSince dmxdev-\u003edvr_buffer.queue is a shared waitqueue (all opens of the\nsame DVR device share it), this orphans any existing waitqueue entries\nfrom io_uring poll or epoll, leaving them with stale prev/next pointers\nwhile the list head is reset to {self, self}.\n\nThe waitqueue and spinlock in dvr_buffer are already properly\ninitialized once in dvb_dmxdev_init().  The open path only needs to\nreset the buffer data pointer, size, and read/write positions.\n\nReplace the dvb_ringbuffer_init() call in dvb_dvr_open() with direct\nassignment of data/size and a call to dvb_ringbuffer_reset(), which\nproperly resets pread, pwrite, and error with correct memory ordering\nwithout touching the waitqueue or spinlock."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nmedia: dvb-core: corrige la reinicializaci\u00f3n incorrecta del b\u00fafer circular al reabrir\n\ndvb_dvr_open() llama a dvb_ringbuffer_init() cuando un nuevo lector abre el dispositivo DVR. dvb_ringbuffer_init() llama a init_waitqueue_head(), lo que reinicializa la cabecera de la lista de la cola de espera a vac\u00eda.\n\nDado que dmxdev-\u0026gt;dvr_buffer.queue es una cola de espera compartida (todas las aperturas del mismo dispositivo DVR la comparten), esto deja hu\u00e9rfanas las entradas existentes de la cola de espera de io_uring poll o epoll, dej\u00e1ndolas con punteros prev/next obsoletos mientras la cabecera de la lista se restablece a {self, self}.\n\nLa cola de espera y el spinlock en dvr_buffer ya est\u00e1n correctamente inicializados una vez en dvb_dmxdev_init(). La ruta de apertura solo necesita restablecer el puntero de datos del b\u00fafer, el tama\u00f1o y las posiciones de lectura/escritura.\n\nReemplace la llamada a dvb_ringbuffer_init() en dvb_dvr_open() con la asignaci\u00f3n directa de datos/tama\u00f1o y una llamada a dvb_ringbuffer_reset(), que restablece correctamente pread, pwrite y error con el ordenamiento de memoria correcto sin tocar la cola de espera o el spinlock."
    }
  ],
  "id": "CVE-2026-23253",
  "lastModified": "2026-06-17T10:21:11.537",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-03-18T18:16:23.383",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/32eb8e4adc207ef31bc6e5ae56bab940b0176066"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/527cfa8a3486b3555c5c15e2f62be484a11398dc"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/af050ab44fa1b1897a940d7d756e512232f5e5df"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/bfbc0b5b32a8f28ce284add619bf226716a59bc0"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/cfd94642025e6f71c8f754bdec0800ee95e4f3dd"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/d71781bad59b1c9d60d7068004581f9bf19c0c9d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/f1e520ca2e83ece6731af6167c9e5e16931ecba0"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/fb378cf89be434ed1f10ab79cc4788fba8ae868d"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

GHSA-2M3P-78C9-6W3J

Vulnerability from github – Published: 2026-03-18 18:31 – Updated: 2026-04-18 09:30

Details

In the Linux kernel, the following vulnerability has been resolved:

media: dvb-core: fix wrong reinitialization of ringbuffer on reopen

dvb_dvr_open() calls dvb_ringbuffer_init() when a new reader opens the DVR device. dvb_ringbuffer_init() calls init_waitqueue_head(), which reinitializes the waitqueue list head to empty.

Since dmxdev->dvr_buffer.queue is a shared waitqueue (all opens of the same DVR device share it), this orphans any existing waitqueue entries from io_uring poll or epoll, leaving them with stale prev/next pointers while the list head is reset to {self, self}.

The waitqueue and spinlock in dvr_buffer are already properly initialized once in dvb_dmxdev_init(). The open path only needs to reset the buffer data pointer, size, and read/write positions.

Replace the dvb_ringbuffer_init() call in dvb_dvr_open() with direct assignment of data/size and a call to dvb_ringbuffer_reset(), which properly resets pread, pwrite, and error with correct memory ordering without touching the waitqueue or spinlock.

Severity

7.8 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Show details on source website

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{
  "affected": [],
  "aliases": [
    "CVE-2026-23253"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-18T18:16:23Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: dvb-core: fix wrong reinitialization of ringbuffer on reopen\n\ndvb_dvr_open() calls dvb_ringbuffer_init() when a new reader opens the\nDVR device.  dvb_ringbuffer_init() calls init_waitqueue_head(), which\nreinitializes the waitqueue list head to empty.\n\nSince dmxdev-\u003edvr_buffer.queue is a shared waitqueue (all opens of the\nsame DVR device share it), this orphans any existing waitqueue entries\nfrom io_uring poll or epoll, leaving them with stale prev/next pointers\nwhile the list head is reset to {self, self}.\n\nThe waitqueue and spinlock in dvr_buffer are already properly\ninitialized once in dvb_dmxdev_init().  The open path only needs to\nreset the buffer data pointer, size, and read/write positions.\n\nReplace the dvb_ringbuffer_init() call in dvb_dvr_open() with direct\nassignment of data/size and a call to dvb_ringbuffer_reset(), which\nproperly resets pread, pwrite, and error with correct memory ordering\nwithout touching the waitqueue or spinlock.",
  "id": "GHSA-2m3p-78c9-6w3j",
  "modified": "2026-04-18T09:30:17Z",
  "published": "2026-03-18T18:31:17Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23253"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/32eb8e4adc207ef31bc6e5ae56bab940b0176066"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/527cfa8a3486b3555c5c15e2f62be484a11398dc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/af050ab44fa1b1897a940d7d756e512232f5e5df"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bfbc0b5b32a8f28ce284add619bf226716a59bc0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cfd94642025e6f71c8f754bdec0800ee95e4f3dd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d71781bad59b1c9d60d7068004581f9bf19c0c9d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f1e520ca2e83ece6731af6167c9e5e16931ecba0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fb378cf89be434ed1f10ab79cc4788fba8ae868d"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

MSRC_CVE-2026-23253

Vulnerability from csaf_microsoft - Published: 2026-03-02 00:00 - Updated: 2026-03-27 14:38

Summary

media: dvb-core: fix wrong reinitialization of ringbuffer on reopen

Scope

1 vulnerability in this advisory, including CVE-2026-23253.

CVE-2026-23253

Fixed: 1 product Known affected: 1 product

https://learn.microsoft.com/en-us/azure/azure-linux/tutoria…

Open the full advisory

OPENSUSE-SU-2026:20826-1

Vulnerability from csaf_opensuse - Published: 2026-05-28 12:58 - Updated: 2026-05-28 12:58

Summary

Security update for the Linux Kernel

Severity

Important

Scope

206 vulnerabilities in this advisory, including CVE-2026-23253.

CVE-2026-23253

5.5 (Medium)


                
                  CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Recommended: 136 products

Open the full advisory

SUSE-SU-2026:21841-1

Vulnerability from csaf_suse - Published: 2026-05-28 11:40 - Updated: 2026-05-28 11:40

Summary

Security update for the Linux Kernel

Severity

Important

Scope

206 vulnerabilities in this advisory, including CVE-2026-23253.

CVE-2026-23253

5.5 (Medium)


                
                  CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Recommended: 28 products

Open the full advisory

SUSE-SU-2026:21845-1

Vulnerability from csaf_suse - Published: 2026-05-28 11:49 - Updated: 2026-05-28 11:49

Summary

Security update for the Linux Kernel

Severity

Important

Scope

206 vulnerabilities in this advisory, including CVE-2026-23253.

CVE-2026-23253

5.5 (Medium)


                
                  CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Recommended: 9 products

Open the full advisory

SUSE-SU-2026:21860-1

Vulnerability from csaf_suse - Published: 2026-05-28 11:40 - Updated: 2026-05-28 11:40

Summary

Security update for the Linux Kernel

Severity

Important

Scope

206 vulnerabilities in this advisory, including CVE-2026-23253.

CVE-2026-23253

5.5 (Medium)


                
                  CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Recommended: 114 products

Open the full advisory

SUSE-SU-2026:21876-1

Vulnerability from csaf_suse - Published: 2026-05-29 15:23 - Updated: 2026-05-29 15:23

Summary

Security update for the Linux Kernel

Severity

Important

Scope

181 vulnerabilities in this advisory, including CVE-2026-23253.

CVE-2026-23253

5.5 (Medium)


                
                  CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Recommended: 7 products

Open the full advisory

SUSE-SU-2026:21877-1

Vulnerability from csaf_suse - Published: 2026-05-29 16:26 - Updated: 2026-05-29 16:26

Summary

Security update for the Linux Kernel

Severity

Important

Scope

181 vulnerabilities in this advisory, including CVE-2026-23253.

CVE-2026-23253

5.5 (Medium)


                
                  CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Recommended: 17 products

Open the full advisory

SUSE-SU-2026:21916-1

Vulnerability from csaf_suse - Published: 2026-05-29 17:37 - Updated: 2026-05-29 17:37

Summary

Security update for the Linux Kernel

Severity

Important

Scope

181 vulnerabilities in this advisory, including CVE-2026-23253.

CVE-2026-23253

5.5 (Medium)


                
                  CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Recommended: 4 products

Open the full advisory

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.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-23253 (GCVE-0-2026-23253)

Tags

Sightings

Nomenclature