{ "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" } } } }