{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2023-53219", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-09-15T14:19:21.845Z", "datePublished": "2025-09-15T14:21:47.459Z", "dateUpdated": "2026-08-05T09:13:09.656Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T09:13:09.656Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: netup_unidvb: fix use-after-free at del_timer()\n\nWhen Universal DVB card is detaching, netup_unidvb_dma_fini()\nuses del_timer() to stop dma->timeout timer. But when timer\nhandler netup_unidvb_dma_timeout() is running, del_timer()\ncould not stop it. As a result, the use-after-free bug could\nhappen. The process is shown below:\n\n (cleanup routine) | (timer routine)\n | mod_timer(&dev->tx_sim_timer, ..)\nnetup_unidvb_finidev() | (wait a time)\n netup_unidvb_dma_fini() | netup_unidvb_dma_timeout()\n del_timer(&dma->timeout); |\n | ndev->pci_dev->dev //USE\n\nFix by changing del_timer() to del_timer_sync()." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The UAF is reached only through the PCI remove path (netup_unidvb_finidev → netup_unidvb_dma_fini) on a system with the NetUP PCIe DVB card bound; that is a local driver unbind/unload (or local hot-remove) path, not a network or USB-plug attack surface.\nAC:L - An attacker who keeps queuing DVB buffers (mod_timer in netup_unidvb_buf_queue) while triggering remove controls both sides of the del_timer vs. running netup_unidvb_dma_timeout race and can retry until the handler overlaps teardown; this matches guidance that attacker-controlled races score AC:L.\nPR:L - Triggering remove is via local driver unbind/module unload on an already-present card, scored Low consistent with other remove-cleanup CVEs (e.g. CVE-2023-53225) and the rule to prefer higher severity; DVB/vb2 buffer queueing that arms the timer is also reachable to ordinary video-group users.\nUI:N - The attacker initiates streaming and driver removal themselves; no separate victim action such as opening attacker-supplied content is required.\nS:U - The freed netup_unidvb_dev / embedded netup_dma and timer_list are ordinary kernel heap objects in the same security authority; there is no VM, IOMMU, or sandbox boundary crossed.\nC:H - Use-after-free of ndev/dma (dma->ndev, pci_dev, buffer lists) after kfree(ndev) allows a groomed reallocation to be read back through the still-running timeout handler, which per UAF guidance is Confidentiality High.\nI:H - The handler takes dma->lock and mutates free_buffers via list_del/vb2_buffer_done on freed memory, and the timer_list itself lives inside the freed object—heap-spray UAF primitives for arbitrary write/control-flow hijack, scored Integrity High.\nA:H - A use-after-free timer firing against freed dma/ndev reliably causes kernel oops/panic even when not fully exploited, which is Availability High." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/media/pci/netup_unidvb/netup_unidvb_core.c" ], "versions": [ { "version": "52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e", "lessThan": "dd5c77814f290b353917df329f36de1472d47154", "status": "affected", "versionType": "git" }, { "version": "52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e", "lessThan": "90229e9ee957d4514425e4a4d82c50ab5d57ac4d", "status": "affected", "versionType": "git" }, { "version": "52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e", "lessThan": "1550bcf2983ae1220cc8ab899a39a423fa7cb523", "status": "affected", "versionType": "git" }, { "version": "52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e", "lessThan": "f9982db735a8495eee14267cf193c806b957e942", "status": "affected", "versionType": "git" }, { "version": "52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e", "lessThan": "051af3f0b7d1cd8ab7f3e2523ad8ae1af44caba3", "status": "affected", "versionType": "git" }, { "version": "52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e", "lessThan": "07821524f67bf920342bc84ae8b3dea2a315a89e", "status": "affected", "versionType": "git" }, { "version": "52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e", "lessThan": "c8f9c05e1ebcc9c7bc211cc8b74d8fb86a8756fc", "status": "affected", "versionType": "git" }, { "version": "52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e", "lessThan": "0f5bb36bf9b39a2a96e730bf4455095b50713f63", "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/pci/netup_unidvb/netup_unidvb_core.c" ], "versions": [ { "version": "4.3", "status": "affected" }, { "version": "0", "lessThan": "4.3", "status": "unaffected", "versionType": "semver" }, { "version": "4.14.316", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.284", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.244", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.181", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.113", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.30", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.3.4", "lessThanOrEqual": "6.3.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.4", "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": "4.3", "versionEndExcluding": "4.14.316" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "4.19.284" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "5.4.244" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "5.10.181" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "5.15.113" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "6.1.30" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "6.3.4" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "6.4" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/dd5c77814f290b353917df329f36de1472d47154" }, { "url": "https://git.kernel.org/stable/c/90229e9ee957d4514425e4a4d82c50ab5d57ac4d" }, { "url": "https://git.kernel.org/stable/c/1550bcf2983ae1220cc8ab899a39a423fa7cb523" }, { "url": "https://git.kernel.org/stable/c/f9982db735a8495eee14267cf193c806b957e942" }, { "url": "https://git.kernel.org/stable/c/051af3f0b7d1cd8ab7f3e2523ad8ae1af44caba3" }, { "url": "https://git.kernel.org/stable/c/07821524f67bf920342bc84ae8b3dea2a315a89e" }, { "url": "https://git.kernel.org/stable/c/c8f9c05e1ebcc9c7bc211cc8b74d8fb86a8756fc" }, { "url": "https://git.kernel.org/stable/c/0f5bb36bf9b39a2a96e730bf4455095b50713f63" } ], "title": "media: netup_unidvb: fix use-after-free at del_timer()", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH" } }, { "other": { "type": "ssvc", "content": { "id": "CVE-2023-53219", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "version": "2.0.3", "timestamp": "2026-01-14T17:49:56.699110Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "cweId": "CWE-416", "description": "CWE-416 Use After Free" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-01-14T17:52:58.312Z" } } ] } }