243 lines
13 KiB
JSON
243 lines
13 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2025-68808",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2025-12-24T10:30:51.045Z",
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"datePublished": "2026-01-13T15:29:15.164Z",
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"dateUpdated": "2026-08-05T12:11:39.465Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T12:11:39.465Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"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."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"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."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/media/test-drivers/vidtv/vidtv_channel.c"
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],
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"versions": [
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{
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"version": "3be8037960bccd13052cfdeba8805ad785041d70",
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"lessThan": "c342e294dac4988c8ada759b2f057246e48c5108",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "3be8037960bccd13052cfdeba8805ad785041d70",
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"lessThan": "12ab6ebb37789b84073e83e4d9b14a5e0d133323",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "3be8037960bccd13052cfdeba8805ad785041d70",
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"lessThan": "3caa18d35f1dabe85a3dd31bc387f391ac9f9b4e",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "3be8037960bccd13052cfdeba8805ad785041d70",
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"lessThan": "fb9bd6d8d314b748e946ed6555eb4a956ee8c4d8",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "3be8037960bccd13052cfdeba8805ad785041d70",
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"lessThan": "a69c7fd603bf5ad93177394fbd9711922ee81032",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "3be8037960bccd13052cfdeba8805ad785041d70",
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"lessThan": "30f4d4e5224a9e44e9ceb3956489462319d804ce",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "3be8037960bccd13052cfdeba8805ad785041d70",
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"lessThan": "98aabfe2d79f74613abc2b0b1cef08f97eaf5322",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/media/test-drivers/vidtv/vidtv_channel.c"
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],
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"versions": [
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{
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"version": "5.10",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "5.10",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.10.248",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.198",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.160",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.120",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.64",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.3",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.19",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.10",
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"versionEndExcluding": "5.10.248"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.10",
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"versionEndExcluding": "5.15.198"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.10",
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"versionEndExcluding": "6.1.160"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.10",
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"versionEndExcluding": "6.6.120"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.10",
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"versionEndExcluding": "6.12.64"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.10",
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"versionEndExcluding": "6.18.3"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.10",
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"versionEndExcluding": "6.19"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/c342e294dac4988c8ada759b2f057246e48c5108"
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},
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{
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"url": "https://git.kernel.org/stable/c/12ab6ebb37789b84073e83e4d9b14a5e0d133323"
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},
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{
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"url": "https://git.kernel.org/stable/c/3caa18d35f1dabe85a3dd31bc387f391ac9f9b4e"
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},
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{
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"url": "https://git.kernel.org/stable/c/fb9bd6d8d314b748e946ed6555eb4a956ee8c4d8"
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},
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{
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"url": "https://git.kernel.org/stable/c/a69c7fd603bf5ad93177394fbd9711922ee81032"
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},
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{
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"url": "https://git.kernel.org/stable/c/30f4d4e5224a9e44e9ceb3956489462319d804ce"
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},
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{
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"url": "https://git.kernel.org/stable/c/98aabfe2d79f74613abc2b0b1cef08f97eaf5322"
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}
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],
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"title": "media: vidtv: initialize local pointers upon transfer of memory ownership",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |