{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-68217", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-30T09:28:09.375Z", "datePublished": "2026-08-10T12:00:36.773Z", "dateUpdated": "2026-08-19T16:31:48.858Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-19T16:31:48.858Z" }, "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/" } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/media/usb/pwc/pwc-if.c" ], "versions": [ { "version": "885fe18f5542fe283a17f70583383c6cadcba1c3", "lessThan": "97f3c15957ec7e6d249f05407ad947c0644df24d", "status": "affected", "versionType": "git" }, { "version": "885fe18f5542fe283a17f70583383c6cadcba1c3", "lessThan": "a4afffd148991a826e8995362fb10cf8705c1130", "status": "affected", "versionType": "git" }, { "version": "885fe18f5542fe283a17f70583383c6cadcba1c3", "lessThan": "eabe9a59640698137d7382d5b549e95dc37f7565", "status": "affected", "versionType": "git" }, { "version": "885fe18f5542fe283a17f70583383c6cadcba1c3", "lessThan": "a56e7641e09bd80b976e944ae759109b86fd5b38", "status": "affected", "versionType": "git" }, { "version": "885fe18f5542fe283a17f70583383c6cadcba1c3", "lessThan": "acc789b2173070638cad89c2b61d33ed338be0dd", "status": "affected", "versionType": "git" }, { "version": "885fe18f5542fe283a17f70583383c6cadcba1c3", "lessThan": "9afd605dcd96c7a45f338eded1de16679b30e1df", "status": "affected", "versionType": "git" }, { "version": "885fe18f5542fe283a17f70583383c6cadcba1c3", "lessThan": "5d4812668b03f823b5044789d6aa77fe56b42587", "status": "affected", "versionType": "git" }, { "version": "885fe18f5542fe283a17f70583383c6cadcba1c3", "lessThan": "906e410dcffbbd99fb4081abab817a830033aa28", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/media/usb/pwc/pwc-if.c" ], "versions": [ { "version": "3.1", "status": "affected" }, { "version": "0", "lessThan": "3.1", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.265", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.216", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.183", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.148", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.101", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.42", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1.6", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.1", "versionEndExcluding": "5.10.265" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.1", "versionEndExcluding": "5.15.216" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.1", "versionEndExcluding": "6.1.183" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.1", "versionEndExcluding": "6.6.148" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.1", "versionEndExcluding": "6.12.101" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.1", "versionEndExcluding": "6.18.42" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.1", "versionEndExcluding": "7.1.6" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.1", "versionEndExcluding": "7.2" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/97f3c15957ec7e6d249f05407ad947c0644df24d" }, { "url": "https://git.kernel.org/stable/c/a4afffd148991a826e8995362fb10cf8705c1130" }, { "url": "https://git.kernel.org/stable/c/eabe9a59640698137d7382d5b549e95dc37f7565" }, { "url": "https://git.kernel.org/stable/c/a56e7641e09bd80b976e944ae759109b86fd5b38" }, { "url": "https://git.kernel.org/stable/c/acc789b2173070638cad89c2b61d33ed338be0dd" }, { "url": "https://git.kernel.org/stable/c/9afd605dcd96c7a45f338eded1de16679b30e1df" }, { "url": "https://git.kernel.org/stable/c/5d4812668b03f823b5044789d6aa77fe56b42587" }, { "url": "https://git.kernel.org/stable/c/906e410dcffbbd99fb4081abab817a830033aa28" } ], "title": "media: pwc: Drain fill_buf on start_streaming() failure", "x_generator": { "engine": "bippy-1.2.0" } } } }