{"dataType": "CVE_RECORD", "cveMetadata": {"cveId": "CVE-2023-52439", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-20T12:30:33.291Z", "datePublished": "2024-02-20T18:34:49.323Z", "dateUpdated": "2024-09-11T17:33:35.621Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-05-28T19:49:24.554Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nuio: Fix use-after-free in uio_open\n\ncore-1\t\t\t\tcore-2\n-------------------------------------------------------\nuio_unregister_device\t\tuio_open\n\t\t\t\tidev = idr_find()\ndevice_unregister(&idev->dev)\nput_device(&idev->dev)\nuio_device_release\n\t\t\t\tget_device(&idev->dev)\nkfree(idev)\nuio_free_minor(minor)\n\t\t\t\tuio_release\n\t\t\t\tput_device(&idev->dev)\n\t\t\t\tkfree(idev)\n-------------------------------------------------------\n\nIn the core-1 uio_unregister_device(), the device_unregister will kfree\nidev when the idev->dev kobject ref is 1. But after core-1\ndevice_unregister, put_device and before doing kfree, the core-2 may\nget_device. Then:\n1. After core-1 kfree idev, the core-2 will do use-after-free for idev.\n2. When core-2 do uio_release and put_device, the idev will be double\n freed.\n\nTo address this issue, we can get idev atomic & inc idev reference with\nminor_lock."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/uio/uio.c"], "versions": [{"version": "57c5f4df0a5a", "lessThan": "3174e0f7de1b", "status": "affected", "versionType": "git"}, {"version": "57c5f4df0a5a", "lessThan": "e93da893d52d", "status": "affected", "versionType": "git"}, {"version": "57c5f4df0a5a", "lessThan": "5e0be1229ae1", "status": "affected", "versionType": "git"}, {"version": "57c5f4df0a5a", "lessThan": "5cf604ee538e", "status": "affected", "versionType": "git"}, {"version": "57c5f4df0a5a", "lessThan": "17a8519cb359", "status": "affected", "versionType": "git"}, {"version": "57c5f4df0a5a", "lessThan": "35f102607054", "status": "affected", "versionType": "git"}, {"version": "57c5f4df0a5a", "lessThan": "913205930da6", "status": "affected", "versionType": "git"}, {"version": "57c5f4df0a5a", "lessThan": "0c9ae0b86050", "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/uio/uio.c"], "versions": [{"version": "4.18", "status": "affected"}, {"version": "0", "lessThan": "4.18", "status": "unaffected", "versionType": "custom"}, {"version": "4.19.306", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "custom"}, {"version": "5.4.268", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "custom"}, {"version": "5.10.209", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "custom"}, {"version": "5.15.148", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "custom"}, {"version": "6.1.74", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "custom"}, {"version": "6.6.13", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "custom"}, {"version": "6.7.1", "lessThanOrEqual": "6.7.*", "status": "unaffected", "versionType": "custom"}, {"version": "6.8", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "references": [{"url": "https://git.kernel.org/stable/c/3174e0f7de1ba392dc191625da83df02d695b60c"}, {"url": "https://git.kernel.org/stable/c/e93da893d52d82d57fc0db2ca566024e0f26ff50"}, {"url": "https://git.kernel.org/stable/c/5e0be1229ae199ebb90b33102f74a0f22d152570"}, {"url": "https://git.kernel.org/stable/c/5cf604ee538ed0c467abe3b4cda5308a6398f0f7"}, {"url": "https://git.kernel.org/stable/c/17a8519cb359c3b483fb5c7367efa9a8a508bdea"}, {"url": "https://git.kernel.org/stable/c/35f102607054faafe78d2a6994b18d5d9d6e92ad"}, {"url": "https://git.kernel.org/stable/c/913205930da6213305616ac539447702eaa85e41"}, {"url": "https://git.kernel.org/stable/c/0c9ae0b8605078eafc3bea053cc78791e97ba2e2"}, {"url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00016.html"}, {"url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html"}], "title": "uio: Fix use-after-free in uio_open", "x_generator": {"engine": "bippy-a5840b7849dd"}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T22:55:41.851Z"}, "title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/3174e0f7de1ba392dc191625da83df02d695b60c", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/e93da893d52d82d57fc0db2ca566024e0f26ff50", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/5e0be1229ae199ebb90b33102f74a0f22d152570", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/5cf604ee538ed0c467abe3b4cda5308a6398f0f7", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/17a8519cb359c3b483fb5c7367efa9a8a508bdea", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/35f102607054faafe78d2a6994b18d5d9d6e92ad", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/913205930da6213305616ac539447702eaa85e41", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/0c9ae0b8605078eafc3bea053cc78791e97ba2e2", "tags": ["x_transferred"]}, {"url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00016.html", "tags": ["x_transferred"]}, {"url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html", "tags": ["x_transferred"]}]}, {"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2023-52439", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-09-10T16:02:55.773038Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T17:33:35.621Z"}}]}, "dataVersion": "5.1"}

{"dataType": "CVE_RECORD", "cveMetadata": {"cveId": "CVE-2023-52439", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-20T12:30:33.291Z", "datePublished": "2024-02-20T18:34:49.323Z", "dateUpdated": "2024-08-02T22:55:41.851Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-05-28T19:49:24.554Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nuio: Fix use-after-free in uio_open\n\ncore-1\t\t\t\tcore-2\n-------------------------------------------------------\nuio_unregister_device\t\tuio_open\n\t\t\t\tidev = idr_find()\ndevice_unregister(&idev->dev)\nput_device(&idev->dev)\nuio_device_release\n\t\t\t\tget_device(&idev->dev)\nkfree(idev)\nuio_free_minor(minor)\n\t\t\t\tuio_release\n\t\t\t\tput_device(&idev->dev)\n\t\t\t\tkfree(idev)\n-------------------------------------------------------\n\nIn the core-1 uio_unregister_device(), the device_unregister will kfree\nidev when the idev->dev kobject ref is 1. But after core-1\ndevice_unregister, put_device and before doing kfree, the core-2 may\nget_device. Then:\n1. After core-1 kfree idev, the core-2 will do use-after-free for idev.\n2. When core-2 do uio_release and put_device, the idev will be double\n freed.\n\nTo address this issue, we can get idev atomic & inc idev reference with\nminor_lock."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/uio/uio.c"], "versions": [{"version": "57c5f4df0a5a", "lessThan": "3174e0f7de1b", "status": "affected", "versionType": "git"}, {"version": "57c5f4df0a5a", "lessThan": "e93da893d52d", "status": "affected", "versionType": "git"}, {"version": "57c5f4df0a5a", "lessThan": "5e0be1229ae1", "status": "affected", "versionType": "git"}, {"version": "57c5f4df0a5a", "lessThan": "5cf604ee538e", "status": "affected", "versionType": "git"}, {"version": "57c5f4df0a5a", "lessThan": "17a8519cb359", "status": "affected", "versionType": "git"}, {"version": "57c5f4df0a5a", "lessThan": "35f102607054", "status": "affected", "versionType": "git"}, {"version": "57c5f4df0a5a", "lessThan": "913205930da6", "status": "affected", "versionType": "git"}, {"version": "57c5f4df0a5a", "lessThan": "0c9ae0b86050", "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/uio/uio.c"], "versions": [{"version": "4.18", "status": "affected"}, {"version": "0", "lessThan": "4.18", "status": "unaffected", "versionType": "custom"}, {"version": "4.19.306", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "custom"}, {"version": "5.4.268", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "custom"}, {"version": "5.10.209", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "custom"}, {"version": "5.15.148", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "custom"}, {"version": "6.1.74", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "custom"}, {"version": "6.6.13", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "custom"}, {"version": "6.7.1", "lessThanOrEqual": "6.7.*", "status": "unaffected", "versionType": "custom"}, {"version": "6.8", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "references": [{"url": "https://git.kernel.org/stable/c/3174e0f7de1ba392dc191625da83df02d695b60c"}, {"url": "https://git.kernel.org/stable/c/e93da893d52d82d57fc0db2ca566024e0f26ff50"}, {"url": "https://git.kernel.org/stable/c/5e0be1229ae199ebb90b33102f74a0f22d152570"}, {"url": "https://git.kernel.org/stable/c/5cf604ee538ed0c467abe3b4cda5308a6398f0f7"}, {"url": "https://git.kernel.org/stable/c/17a8519cb359c3b483fb5c7367efa9a8a508bdea"}, {"url": "https://git.kernel.org/stable/c/35f102607054faafe78d2a6994b18d5d9d6e92ad"}, {"url": "https://git.kernel.org/stable/c/913205930da6213305616ac539447702eaa85e41"}, {"url": "https://git.kernel.org/stable/c/0c9ae0b8605078eafc3bea053cc78791e97ba2e2"}, {"url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00016.html"}, {"url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html"}], "title": "uio: Fix use-after-free in uio_open", "x_generator": {"engine": "bippy-a5840b7849dd"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2023-52439", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-09-10T16:02:55.773038Z"}}}], "providerMetadata": {"shortName": "CISA-ADP", "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "dateUpdated": "2024-09-11T12:42:17.509Z"}, "title": "CISA ADP Vulnrichment"}]}, "dataVersion": "5.1"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "5A94A44F-4F9A-4447-AF13-47B88B4CD211", "versionEndExcluding": "4.19.306", "versionStartExcluding": "4.18.0", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "35ADF607-EDCA-45AB-8FB6-9F2D40D47C0C", "versionEndExcluding": "5.4.268", "versionStartIncluding": "4.20.0", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "5D2E4F24-2FBB-4434-8598-2B1499E566B5", "versionEndExcluding": "5.10.209", "versionStartIncluding": "5.5.0", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "E25E1389-4B0F-407A-9C94-5908FF3EE88B", "versionEndExcluding": "5.15.148", "versionStartIncluding": "5.11.0", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "F7DD9841-CE11-470D-A285-A2E8E0F6640D", "versionEndExcluding": "6.1.74", "versionStartIncluding": "5.16.0", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "74A1FFC7-19FA-450E-BC2D-2BBD2EBF0A5F", "versionEndExcluding": "6.6.13", "versionStartIncluding": "6.2.0", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "664EB721-F519-48BB-B1C8-897D5990CD78", "versionEndExcluding": "6.7.1", "versionStartIncluding": "6.7.0", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:4.18:-:*:*:*:*:*:*", "matchCriteriaId": "6AE7DC47-EAFA-42D5-BCF5-C7039EE3D771", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:4.18:rc5:*:*:*:*:*:*", "matchCriteriaId": "DB2B91AF-ACE1-4F6F-B2D0-9D4B7D8D20CE", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:4.18:rc6:*:*:*:*:*:*", "matchCriteriaId": "30FBD992-DD41-441E-A6C7-D39DAC45DA34", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:4.18:rc7:*:*:*:*:*:*", "matchCriteriaId": "10979D17-76B4-465F-A475-78680FBECEBD", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:4.18:rc8:*:*:*:*:*:*", "matchCriteriaId": "56BF1EDD-3351-4E3E-AD42-54AF093ADB89", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nuio: Fix use-after-free in uio_open\n\ncore-1\t\t\t\tcore-2\n-------------------------------------------------------\nuio_unregister_device\t\tuio_open\n\t\t\t\tidev = idr_find()\ndevice_unregister(&idev->dev)\nput_device(&idev->dev)\nuio_device_release\n\t\t\t\tget_device(&idev->dev)\nkfree(idev)\nuio_free_minor(minor)\n\t\t\t\tuio_release\n\t\t\t\tput_device(&idev->dev)\n\t\t\t\tkfree(idev)\n-------------------------------------------------------\n\nIn the core-1 uio_unregister_device(), the device_unregister will kfree\nidev when the idev->dev kobject ref is 1. But after core-1\ndevice_unregister, put_device and before doing kfree, the core-2 may\nget_device. Then:\n1. After core-1 kfree idev, the core-2 will do use-after-free for idev.\n2. When core-2 do uio_release and put_device, the idev will be double\n freed.\n\nTo address this issue, we can get idev atomic & inc idev reference with\nminor_lock."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: uio: corrige use-after-free en uio_open core-1 core-2 ------------------------------------------------------- uio_unregister_device uio_open idev = idr_find() device_unregister(&idev->dev) put_device(&idev->dev) uio_device_release get_device(&idev->dev) kfree(idev) uio_free_minor(minor) uio_release put_device(&idev->dev) kfree(idev) ------------------------------------------------------- In the core-1 uio_unregister_device(), the device_unregister se liberar\u00e1 idev cuando la referencia del objeto idev->dev kobject es 1. But after core-1 device_unregister, put_device and before doing kfree, the core-2 may get_device. Then: 1. After core-1 kfree idev, the core-2 will do use-after-free for idev. 2. When core-2 do uio_release and put_device, el idev se liberar\u00e1 dos veces. Para solucionar este problema, podemos obtener la referencia de idev atomic & inc idev con minor_lock."}], "id": "CVE-2023-52439", "lastModified": "2024-06-27T12:15:14.160", "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": "nvd@nist.gov", "type": "Primary"}]}, "published": "2024-02-20T21:15:08.213", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0c9ae0b8605078eafc3bea053cc78791e97ba2e2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/17a8519cb359c3b483fb5c7367efa9a8a508bdea"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3174e0f7de1ba392dc191625da83df02d695b60c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/35f102607054faafe78d2a6994b18d5d9d6e92ad"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5cf604ee538ed0c467abe3b4cda5308a6398f0f7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5e0be1229ae199ebb90b33102f74a0f22d152570"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/913205930da6213305616ac539447702eaa85e41"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e93da893d52d82d57fc0db2ca566024e0f26ff50"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00016.html"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-415"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2024:3627", "cpe": "cpe:/a:redhat:enterprise_linux:8::nfv", "package": "kernel-rt-0:4.18.0-553.5.1.rt7.346.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-06-05T00:00:00Z"}, {"advisory": "RHSA-2024:3618", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "kernel-0:4.18.0-553.5.1.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-06-05T00:00:00Z"}, {"advisory": "RHSA-2024:5281", "cpe": "cpe:/o:redhat:rhel_aus:8.6", "package": "kernel-0:4.18.0-372.118.1.el8_6", "product_name": "Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support", "release_date": "2024-08-13T00:00:00Z"}, {"advisory": "RHSA-2024:5281", "cpe": "cpe:/o:redhat:rhel_tus:8.6", "package": "kernel-0:4.18.0-372.118.1.el8_6", "product_name": "Red Hat Enterprise Linux 8.6 Telecommunications Update Service", "release_date": "2024-08-13T00:00:00Z"}, {"advisory": "RHSA-2024:5281", "cpe": "cpe:/o:redhat:rhel_e4s:8.6", "package": "kernel-0:4.18.0-372.118.1.el8_6", "product_name": "Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions", "release_date": "2024-08-13T00:00:00Z"}, {"advisory": "RHSA-2024:4823", "cpe": "cpe:/a:redhat:rhel_eus:9.2", "package": "kernel-0:5.14.0-284.75.1.el9_2", "product_name": "Red Hat Enterprise Linux 9.2 Extended Update Support", "release_date": "2024-07-24T00:00:00Z"}, {"advisory": "RHSA-2024:4831", "cpe": "cpe:/a:redhat:rhel_eus:9.2::nfv", "package": "kernel-rt-0:5.14.0-284.75.1.rt14.360.el9_2", "product_name": "Red Hat Enterprise Linux 9.2 Extended Update Support", "release_date": "2024-07-24T00:00:00Z"}], "bugzilla": {"description": "kernel: uio: Fix use-after-free in uio_open", "id": "2265271", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2265271"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "verified"}, "cwe": "CWE-416", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nuio: Fix use-after-free in uio_open\ncore-1core-2\n-------------------------------------------------------\nuio_unregister_deviceuio_open\nidev = idr_find()\ndevice_unregister(&idev->dev)\nput_device(&idev->dev)\nuio_device_release\nget_device(&idev->dev)\nkfree(idev)\nuio_free_minor(minor)\nuio_release\nput_device(&idev->dev)\nkfree(idev)\n-------------------------------------------------------\nIn the core-1 uio_unregister_device(), the device_unregister will kfree\nidev when the idev->dev kobject ref is 1. But after core-1\ndevice_unregister, put_device and before doing kfree, the core-2 may\nget_device. Then:\n1. After core-1 kfree idev, the core-2 will do use-after-free for idev.\n2. When core-2 do uio_release and put_device, the idev will be double\nfreed.\nTo address this issue, we can get idev atomic & inc idev reference with\nminor_lock.", "A flaw was found in the Linux kernel\u2019s uio subsystem. A use-after-free memory flaw in the uio_open functionality allows a local user to crash or escalate their privileges on the system."], "mitigation": {"lang": "en:us", "value": "To mitigate this issue, prevent module uio from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically."}, "name": "CVE-2023-52439", "package_state": [{"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": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-02-20T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-52439\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-52439\nhttps://lore.kernel.org/linux-cve-announce/2024022026-wobbling-jumbo-748e@gregkh/T/#u"], "threat_severity": "Moderate"}