CVE-2026-68217
Estado: RecibidaSin puntuar—
In the Linux kernel, the following vulnerability has been resolved:
media: pwc: Drain fill_buf on start_streaming() failure
pwc_isoc_init() submits its isochronous URBs with usb_submit_urb(.., GFP_KERNEL) in a loop. After the first URB is submitted, its completion handler pwc_isoc_handler() can run on another CPU before the loop finishes:
pwc_get_next_fill_buf() detaches a buffer from pdev->queued_bufs and stores it in pdev->fill_buf. The error path in start_streaming() only drains pdev->queued_bufs, so the buffer parked in pdev->fill_buf is leaked. vb2_start_streaming() then triggers WARN_ON(owned_by_drv_count).
Leer descripción completaMostrar menos
stop_streaming() already handles this since commit 80b0963e1698 ("[media] pwc: fix WARN_ON"), which added the fill_buf drain in the teardown path but not in the start_streaming() error path. Mirror that handling on failure so start_streaming() returns with no buffer owned by the driver.
Issue identified by automated review of the INV-003 series at https://sashiko.dev/
Detalles técnicos trazas, registros y código del informe original
start_streaming()
pwc_isoc_init()
usb_submit_urb(urbs[0], GFP_KERNEL)
pwc_isoc_handler(urbs[0])
pdev->fill_buf =
pwc_get_next_fill_buf(pdev)
usb_submit_urb(urbs[i>0], ..) -> fails
pwc_isoc_cleanup(pdev) /* kills URBs */
return ret;
pwc_cleanup_queued_bufs(pdev, VB2_BUF_STATE_QUEUED)CVSS
NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.22%
- Percentil entre todas las CVEs puntuadas: 11
- Fecha de la puntuación: 5/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
Referencias
- https://git.kernel.org/stable/c/5d4812668b03f823b5044789d6aa77fe56b42587
- https://git.kernel.org/stable/c/906e410dcffbbd99fb4081abab817a830033aa28
- https://git.kernel.org/stable/c/97f3c15957ec7e6d249f05407ad947c0644df24d
- https://git.kernel.org/stable/c/9afd605dcd96c7a45f338eded1de16679b30e1df
- https://git.kernel.org/stable/c/a4afffd148991a826e8995362fb10cf8705c1130
- https://git.kernel.org/stable/c/a56e7641e09bd80b976e944ae759109b86fd5b38
- https://git.kernel.org/stable/c/acc789b2173070638cad89c2b61d33ed338be0dd
- https://git.kernel.org/stable/c/eabe9a59640698137d7382d5b549e95dc37f7565
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-68217",
"cveTags": [],
"metrics": {},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "885fe18f5542fe283a17f70583383c6cadcba1c3",
"lessThan": "97f3c15957ec7e6d249f05407ad947c0644df24d",
"versionType": "git"
},
{
"status": "affected",
"version": "885fe18f5542fe283a17f70583383c6cadcba1c3",
"lessThan": "a4afffd148991a826e8995362fb10cf8705c1130",
"versionType": "git"
},
{
"status": "affected",
"version": "885fe18f5542fe283a17f70583383c6cadcba1c3",
"lessThan": "eabe9a59640698137d7382d5b549e95dc37f7565",
"versionType": "git"
},
{
"status": "affected",
"version": "885fe18f5542fe283a17f70583383c6cadcba1c3",
"lessThan": "a56e7641e09bd80b976e944ae759109b86fd5b38",
"versionType": "git"
},
{
"status": "affected",
"version": "885fe18f5542fe283a17f70583383c6cadcba1c3",
"lessThan": "acc789b2173070638cad89c2b61d33ed338be0dd",
"versionType": "git"
},
{
"status": "affected",
"version": "885fe18f5542fe283a17f70583383c6cadcba1c3",
"lessThan": "9afd605dcd96c7a45f338eded1de16679b30e1df",
"versionType": "git"
},
{
"status": "affected",
"version": "885fe18f5542fe283a17f70583383c6cadcba1c3",
"lessThan": "5d4812668b03f823b5044789d6aa77fe56b42587",
"versionType": "git"
},
{
"status": "affected",
"version": "885fe18f5542fe283a17f70583383c6cadcba1c3",
"lessThan": "906e410dcffbbd99fb4081abab817a830033aa28",
"versionType": "git"
}
],
"programFiles": [
"drivers/media/usb/pwc/pwc-if.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.1"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.1",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.265",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.216",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.183",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.148",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.101",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.42",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.6",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/media/usb/pwc/pwc-if.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-08-10T13:20:09.657",
"references": [
{
"url": "https://git.kernel.org/stable/c/5d4812668b03f823b5044789d6aa77fe56b42587",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/906e410dcffbbd99fb4081abab817a830033aa28",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/97f3c15957ec7e6d249f05407ad947c0644df24d",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/9afd605dcd96c7a45f338eded1de16679b30e1df",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/a4afffd148991a826e8995362fb10cf8705c1130",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/a56e7641e09bd80b976e944ae759109b86fd5b38",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/acc789b2173070638cad89c2b61d33ed338be0dd",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/eabe9a59640698137d7382d5b549e95dc37f7565",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: pwc: Drain fill_buf on start_streaming() failure\n\npwc_isoc_init() submits its isochronous URBs with\nusb_submit_urb(.., GFP_KERNEL) in a loop. After the first URB is\nsubmitted, its completion handler pwc_isoc_handler() can run on another\nCPU before the loop finishes:\n\n start_streaming()\n pwc_isoc_init()\n usb_submit_urb(urbs[0], GFP_KERNEL)\n pwc_isoc_handler(urbs[0])\n pdev->fill_buf =\n pwc_get_next_fill_buf(pdev)\n usb_submit_urb(urbs[i>0], ..) -> fails\n pwc_isoc_cleanup(pdev) /* kills URBs */\n return ret;\n pwc_cleanup_queued_bufs(pdev, VB2_BUF_STATE_QUEUED)\n\npwc_get_next_fill_buf() detaches a buffer from pdev->queued_bufs and\nstores it in pdev->fill_buf. The error path in start_streaming() only\ndrains pdev->queued_bufs, so the buffer parked in pdev->fill_buf is\nleaked. vb2_start_streaming() then triggers\nWARN_ON(owned_by_drv_count).\n\nstop_streaming() already handles this since commit 80b0963e1698\n(\"[media] pwc: fix WARN_ON\"), which added the fill_buf drain in the\nteardown path but not in the start_streaming() error path. Mirror that\nhandling on failure so start_streaming() returns with no buffer owned\nby the driver.\n\nIssue identified by automated review of the INV-003 series at\nhttps://sashiko.dev/"
}
],
"lastModified": "2026-08-19T17:20:37.867",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}