CVE-2025-68808

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-68808", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-12-24T10:30:51.045Z", "datePublished": "2026-01-13T15:29:15.164Z", "dateUpdated": "2026-08-05T12:11:39.465Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:11:39.465Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: vidtv: initialize local pointers upon transfer of memory ownership\n\nvidtv_channel_si_init() creates a temporary list (program, service, event)\nand ownership of the memory itself is transferred to the PAT/SDT/EIT\ntables through vidtv_psi_pat_program_assign(),\nvidtv_psi_sdt_service_assign(), vidtv_psi_eit_event_assign().\n\nThe problem here is that the local pointer where the memory ownership\ntransfer was completed is not initialized to NULL. This causes the\nvidtv_psi_pmt_create_sec_for_each_pat_entry() function to fail, and\nin the flow that jumps to free_eit, the memory that was freed by\nvidtv_psi_*_table_destroy() can be accessed again by\nvidtv_psi_*_event_destroy() due to the uninitialized local pointer, so it\nis freed once again.\n\nTherefore, to prevent use-after-free and double-free vulnerability,\nlocal pointers must be initialized to NULL when transferring memory\nownership."}], "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 vulnerable path is reached through demux ioctls such as DMX_START on a local /dev/dvb/adapter*/demux* device; no network or physical path exists.\nAC:L - In a reasonable vidtv test/debug deployment, the attacker can deterministically target the PMT allocation using per-task fault injection or attacker-induced memory pressure, with no race or victim-controlled timing.\nPR:L - No capability checks occur along the ioctl path; an ordinary local user with the device's video-group or active-seat ACL can trigger it.\nUI:N - Once the vidtv device is present, the attacker independently opens the demux node, configures a filter, and starts the feed without victim action.\nS:U - The corruption occurs within the host kernel reached by a host process and does not cross a VM, IOMMU, or separate security-authority boundary.\nC:H - The cleanup dereferences freed list and descriptor pointers, and heap grooming can convert these UAF and double-free conditions into kernel-memory disclosure or arbitrary-read primitives.\nI:H - Repeated frees of EIT, SDT, PAT, and nested descriptor allocations can corrupt allocator freelists and support arbitrary writes or control-flow hijacking.\nA:H - The defect demonstrably causes a KASAN kernel panic, while non-instrumented kernels can likewise crash from the UAF, invalid traversal, or double-free."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/media/test-drivers/vidtv/vidtv_channel.c"], "versions": [{"version": "3be8037960bccd13052cfdeba8805ad785041d70", "lessThan": "c342e294dac4988c8ada759b2f057246e48c5108", "status": "affected", "versionType": "git"}, {"version": "3be8037960bccd13052cfdeba8805ad785041d70", "lessThan": "12ab6ebb37789b84073e83e4d9b14a5e0d133323", "status": "affected", "versionType": "git"}, {"version": "3be8037960bccd13052cfdeba8805ad785041d70", "lessThan": "3caa18d35f1dabe85a3dd31bc387f391ac9f9b4e", "status": "affected", "versionType": "git"}, {"version": "3be8037960bccd13052cfdeba8805ad785041d70", "lessThan": "fb9bd6d8d314b748e946ed6555eb4a956ee8c4d8", "status": "affected", "versionType": "git"}, {"version": "3be8037960bccd13052cfdeba8805ad785041d70", "lessThan": "a69c7fd603bf5ad93177394fbd9711922ee81032", "status": "affected", "versionType": "git"}, {"version": "3be8037960bccd13052cfdeba8805ad785041d70", "lessThan": "30f4d4e5224a9e44e9ceb3956489462319d804ce", "status": "affected", "versionType": "git"}, {"version": "3be8037960bccd13052cfdeba8805ad785041d70", "lessThan": "98aabfe2d79f74613abc2b0b1cef08f97eaf5322", "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/test-drivers/vidtv/vidtv_channel.c"], "versions": [{"version": "5.10", "status": "affected"}, {"version": "0", "lessThan": "5.10", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.248", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.198", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.160", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.120", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.64", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.3", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19", "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": "5.10", "versionEndExcluding": "5.10.248"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "5.15.198"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.1.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.6.120"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.12.64"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.18.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.19"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/c342e294dac4988c8ada759b2f057246e48c5108"}, {"url": "https://git.kernel.org/stable/c/12ab6ebb37789b84073e83e4d9b14a5e0d133323"}, {"url": "https://git.kernel.org/stable/c/3caa18d35f1dabe85a3dd31bc387f391ac9f9b4e"}, {"url": "https://git.kernel.org/stable/c/fb9bd6d8d314b748e946ed6555eb4a956ee8c4d8"}, {"url": "https://git.kernel.org/stable/c/a69c7fd603bf5ad93177394fbd9711922ee81032"}, {"url": "https://git.kernel.org/stable/c/30f4d4e5224a9e44e9ceb3956489462319d804ce"}, {"url": "https://git.kernel.org/stable/c/98aabfe2d79f74613abc2b0b1cef08f97eaf5322"}], "title": "media: vidtv: initialize local pointers upon transfer of memory ownership", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/media/test-drivers/vidtv/vidtv_channel.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "c342e294dac4988c8ada759b2f057246e48c5108", "status": "affected", "version": "3be8037960bccd13052cfdeba8805ad785041d70", "versionType": "git"}, {"lessThan": "12ab6ebb37789b84073e83e4d9b14a5e0d133323", "status": "affected", "version": "3be8037960bccd13052cfdeba8805ad785041d70", "versionType": "git"}, {"lessThan": "3caa18d35f1dabe85a3dd31bc387f391ac9f9b4e", "status": "affected", "version": "3be8037960bccd13052cfdeba8805ad785041d70", "versionType": "git"}, {"lessThan": "fb9bd6d8d314b748e946ed6555eb4a956ee8c4d8", "status": "affected", "version": "3be8037960bccd13052cfdeba8805ad785041d70", "versionType": "git"}, {"lessThan": "a69c7fd603bf5ad93177394fbd9711922ee81032", "status": "affected", "version": "3be8037960bccd13052cfdeba8805ad785041d70", "versionType": "git"}, {"lessThan": "30f4d4e5224a9e44e9ceb3956489462319d804ce", "status": "affected", "version": "3be8037960bccd13052cfdeba8805ad785041d70", "versionType": "git"}, {"lessThan": "98aabfe2d79f74613abc2b0b1cef08f97eaf5322", "status": "affected", "version": "3be8037960bccd13052cfdeba8805ad785041d70", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/media/test-drivers/vidtv/vidtv_channel.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.10"}, {"lessThan": "5.10", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.248", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.198", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.160", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.120", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.64", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.3", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.19", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: vidtv: initialize local pointers upon transfer of memory ownership\n\nvidtv_channel_si_init() creates a temporary list (program, service, event)\nand ownership of the memory itself is transferred to the PAT/SDT/EIT\ntables through vidtv_psi_pat_program_assign(),\nvidtv_psi_sdt_service_assign(), vidtv_psi_eit_event_assign().\n\nThe problem here is that the local pointer where the memory ownership\ntransfer was completed is not initialized to NULL. This causes the\nvidtv_psi_pmt_create_sec_for_each_pat_entry() function to fail, and\nin the flow that jumps to free_eit, the memory that was freed by\nvidtv_psi_*_table_destroy() can be accessed again by\nvidtv_psi_*_event_destroy() due to the uninitialized local pointer, so it\nis freed once again.\n\nTherefore, to prevent use-after-free and double-free vulnerability,\nlocal pointers must be initialized to NULL when transferring memory\nownership."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nmedia: vidtv: inicializar punteros locales tras la transferencia de la propiedad de la memoria\n\nvidtv_channel_si_init() crea una lista temporal (programa, servicio, evento) y la propiedad de la memoria misma se transfiere a las tablas PAT/SDT/EIT a trav\u00e9s de vidtv_psi_pat_program_assign(), vidtv_psi_sdt_service_assign(), vidtv_psi_eit_event_assign().\n\nEl problema aqu\u00ed es que el puntero local donde se complet\u00f3 la transferencia de la propiedad de la memoria no se inicializa a NULL. Esto hace que la funci\u00f3n vidtv_psi_pmt_create_sec_for_each_pat_entry() falle, y en el flujo que salta a free_eit, la memoria que fue liberada por vidtv_psi_*_table_destroy() puede ser accedida de nuevo por vidtv_psi_*_event_destroy() debido al puntero local no inicializado, por lo que se libera una vez m\u00e1s.\n\nPor lo tanto, para prevenir la vulnerabilidad de uso despu\u00e9s de liberaci\u00f3n y doble liberaci\u00f3n, los punteros locales deben inicializarse a NULL al transferir la propiedad de la memoria."}], "id": "CVE-2025-68808", "lastModified": "2026-07-30T06:24:46.393", "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": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-01-13T16:16:02.967", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/12ab6ebb37789b84073e83e4d9b14a5e0d133323"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/30f4d4e5224a9e44e9ceb3956489462319d804ce"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3caa18d35f1dabe85a3dd31bc387f391ac9f9b4e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/98aabfe2d79f74613abc2b0b1cef08f97eaf5322"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a69c7fd603bf5ad93177394fbd9711922ee81032"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c342e294dac4988c8ada759b2f057246e48c5108"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fb9bd6d8d314b748e946ed6555eb4a956ee8c4d8"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Deferred"}

{"bugzilla": {"description": "kernel: media: vidtv: initialize local pointers upon transfer of memory ownership", "id": "2429100", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2429100"}, "csaw": false, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nmedia: vidtv: initialize local pointers upon transfer of memory ownership\nvidtv_channel_si_init() creates a temporary list (program, service, event)\nand ownership of the memory itself is transferred to the PAT/SDT/EIT\ntables through vidtv_psi_pat_program_assign(),\nvidtv_psi_sdt_service_assign(), vidtv_psi_eit_event_assign().\nThe problem here is that the local pointer where the memory ownership\ntransfer was completed is not initialized to NULL. This causes the\nvidtv_psi_pmt_create_sec_for_each_pat_entry() function to fail, and\nin the flow that jumps to free_eit, the memory that was freed by\nvidtv_psi_*_table_destroy() can be accessed again by\nvidtv_psi_*_event_destroy() due to the uninitialized local pointer, so it\nis freed once again.\nTherefore, to prevent use-after-free and double-free vulnerability,\nlocal pointers must be initialized to NULL when transferring memory\nownership."], "name": "CVE-2025-68808", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-01-13T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-68808\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-68808\nhttps://lore.kernel.org/linux-cve-announce/2026011310-CVE-2025-68808-4cb9@gregkh/T"]}

{}