CVE-2026-68214

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These transfers go through i2c_mux_master_xfer(),\nwhich calls rtl2832_deselect() after the transfer completes,\nrescheduling i2c_gate_work via schedule_delayed_work(). If this\ntransfer is still in flight when rtl2832_remove() runs,\nrtl2832_deselect() can reschedule i2c_gate_work after it has been\ncancelled, causing a use-after-free when kfree(dev) is called.\n\nFix this by calling i2c_mux_del_adapters() before\ncancel_delayed_work_sync(). Once the mux adapter is unregistered, no\nnew I2C transfers can go through it, so rtl2832_deselect() can no\nlonger reschedule i2c_gate_work. The subsequent\ncancel_delayed_work_sync() is then guaranteed to be final."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/media/dvb-frontends/rtl2832.c"], "versions": [{"version": "cddcc40b1b1553010acb89add84c64b5d123ec94", "lessThan": "1e8a6bc19403661661fed5ae82f6eca6c9cdfad2", "status": "affected", "versionType": "git"}, {"version": "cddcc40b1b1553010acb89add84c64b5d123ec94", "lessThan": "68a9c0290897c1436ddceb8cea604c93377a0299", "status": "affected", "versionType": "git"}, {"version": "cddcc40b1b1553010acb89add84c64b5d123ec94", "lessThan": "13c06056699e66ff7109ba68658cc6ea4a23f516", "status": "affected", "versionType": "git"}, {"version": "cddcc40b1b1553010acb89add84c64b5d123ec94", "lessThan": "9acd5bbbe1df8e487e49488692c224496d4c9e16", "status": "affected", "versionType": "git"}, {"version": "cddcc40b1b1553010acb89add84c64b5d123ec94", 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{"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-11-06T16:44:42.918474Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-06T16:55:09.435Z"}}]}}

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While the cancel waits for any running instance\nof i2c_gate_work to finish, it does not prevent the timer from being\nrescheduled by a concurrent thread.\n\nDuring probe, the r820t_attach() call attempts I2C transfers through\nthe mux adapter. These transfers go through i2c_mux_master_xfer(),\nwhich calls rtl2832_deselect() after the transfer completes,\nrescheduling i2c_gate_work via schedule_delayed_work(). If this\ntransfer is still in flight when rtl2832_remove() runs,\nrtl2832_deselect() can reschedule i2c_gate_work after it has been\ncancelled, causing a use-after-free when kfree(dev) is called.\n\nFix this by calling i2c_mux_del_adapters() before\ncancel_delayed_work_sync(). Once the mux adapter is unregistered, no\nnew I2C transfers can go through it, so rtl2832_deselect() can no\nlonger reschedule i2c_gate_work. The subsequent\ncancel_delayed_work_sync() is then guaranteed to be final."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.265", "versionStartIncluding": "4.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.216", "versionStartIncluding": "4.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.183", "versionStartIncluding": "4.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.148", "versionStartIncluding": "4.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.101", "versionStartIncluding": "4.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.42", "versionStartIncluding": "4.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.1.6", "versionStartIncluding": "4.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.2", "versionStartIncluding": "4.7"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-19T16:31:42.193Z"}}}, "cveMetadata": {"cveId": "CVE-2026-68214", "state": "PUBLISHED", "dateUpdated": "2026-11-06T16:55:09.435Z", "dateReserved": "2026-07-30T09:28:09.375Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-08-10T12:00:33.539Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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While the cancel waits for any running instance\nof i2c_gate_work to finish, it does not prevent the timer from being\nrescheduled by a concurrent thread.\n\nDuring probe, the r820t_attach() call attempts I2C transfers through\nthe mux adapter. These transfers go through i2c_mux_master_xfer(),\nwhich calls rtl2832_deselect() after the transfer completes,\nrescheduling i2c_gate_work via schedule_delayed_work(). If this\ntransfer is still in flight when rtl2832_remove() runs,\nrtl2832_deselect() can reschedule i2c_gate_work after it has been\ncancelled, causing a use-after-free when kfree(dev) is called.\n\nFix this by calling i2c_mux_del_adapters() before\ncancel_delayed_work_sync(). Once the mux adapter is unregistered, no\nnew I2C transfers can go through it, so rtl2832_deselect() can no\nlonger reschedule i2c_gate_work. The subsequent\ncancel_delayed_work_sync() is then guaranteed to be final."}], "id": "CVE-2026-68214", "lastModified": "2026-11-06T17:19:22.450", "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-68214", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-06T16:44:42.918474Z", "version": "2.0.3"}}]}, "published": "2026-08-10T13:20:09.287", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/13c06056699e66ff7109ba68658cc6ea4a23f516"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1e8a6bc19403661661fed5ae82f6eca6c9cdfad2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/24bef237eef8dd1ebcffb129ba21891ddad0d309"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2c71bda6edc630a1f8c3c45d8df5fc22d234e042"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/680daf40a82d483949f87f0d8f98639dc47e610c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/68a9c0290897c1436ddceb8cea604c93377a0299"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/90d781711418881f8c836c2a859cc2886625d750"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9acd5bbbe1df8e487e49488692c224496d4c9e16"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel rtl2832 driver: Use-after-free vulnerability leading to system instability", "id": "2513175", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2513175"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-364", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nmedia: rtl2832: fix use-after-free in rtl2832_remove()\ncancel_delayed_work_sync() is called before i2c_mux_del_adapters()\nin rtl2832_remove(). While the cancel waits for any running instance\nof i2c_gate_work to finish, it does not prevent the timer from being\nrescheduled by a concurrent thread.\nDuring probe, the r820t_attach() call attempts I2C transfers through\nthe mux adapter. These transfers go through i2c_mux_master_xfer(),\nwhich calls rtl2832_deselect() after the transfer completes,\nrescheduling i2c_gate_work via schedule_delayed_work(). If this\ntransfer is still in flight when rtl2832_remove() runs,\nrtl2832_deselect() can reschedule i2c_gate_work after it has been\ncancelled, causing a use-after-free when kfree(dev) is called.\nFix this by calling i2c_mux_del_adapters() before\ncancel_delayed_work_sync(). Once the mux adapter is unregistered, no\nnew I2C transfers can go through it, so rtl2832_deselect() can no\nlonger reschedule i2c_gate_work. The subsequent\ncancel_delayed_work_sync() is then guaranteed to be final.", "A flaw was found in the Linux kernel's `media: rtl2832` driver. A timing issue during the removal of the `rtl2832` device can lead to a use-after-free vulnerability. This occurs when the system attempts to access memory that has already been released, which can cause system instability or a denial of service (DoS). A local attacker could potentially exploit this flaw."], "name": "CVE-2026-68214", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:enterprise_linux_nvidia:", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux for NVIDIA 26"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "rhcos", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-08-10T12:00:33Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-68214\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-68214\nhttps://git.kernel.org/stable/c/24bef237eef8dd1ebcffb129ba21891ddad0d309\nhttps://git.kernel.org/stable/c/2c71bda6edc630a1f8c3c45d8df5fc22d234e042\nhttps://git.kernel.org/stable/c/680daf40a82d483949f87f0d8f98639dc47e610c\nhttps://git.kernel.org/stable/c/90d781711418881f8c836c2a859cc2886625d750\nhttps://git.kernel.org/stable/c/9acd5bbbe1df8e487e49488692c224496d4c9e16"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[cddcc40b1b1553010acb89add84c64b5d123ec94,9acd5bbbe1df8e487e49488692c224496d4c9e16)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[cddcc40b1b1553010acb89add84c64b5d123ec94,24bef237eef8dd1ebcffb129ba21891ddad0d309)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[cddcc40b1b1553010acb89add84c64b5d123ec94,2c71bda6edc630a1f8c3c45d8df5fc22d234e042)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[cddcc40b1b1553010acb89add84c64b5d123ec94,90d781711418881f8c836c2a859cc2886625d750)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[cddcc40b1b1553010acb89add84c64b5d123ec94,680daf40a82d483949f87f0d8f98639dc47e610c)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "4.7"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,4.7)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.148,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.101,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.42,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.6,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc1,*)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-10T15:15:04.693358+00:00", "updated": "2026-08-13T05:45:03.010531+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-364", "CWE-416"]}