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vuln-cve/data/2024/27xxx/CVE-2024-27073.json
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{
"dataType": "CVE_RECORD",
"cveMetadata": {
"cveId": "CVE-2024-27073",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2024-02-19T14:20:24.216Z",
"datePublished": "2024-05-01T13:04:37.653Z",
"dateUpdated": "2026-08-05T11:29:22.792Z"
},
"containers": {
"cna": {
"providerMetadata": {
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"shortName": "Linux",
"dateUpdated": "2026-08-05T11:29:22.792Z"
},
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{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: ttpci: fix two memleaks in budget_av_attach\n\nWhen saa7146_register_device and saa7146_vv_init fails, budget_av_attach\nshould free the resources it allocates, like the error-handling of\nttpci_budget_init does. Besides, there are two fixme comment refers to\nsuch deallocations."
}
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{
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"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 code is a PCI probe-time attach callback, and the resulting dangling state is exercised through local device files (/dev/dvb/adapterN/demux0, dvr0, dvbnet); there is no remote or adjacent-network path into budget_av_attach.\nAC:L - Once the failure branch has been taken, the attacker deterministically drives the use-after-free by opening the still-registered dvr0/demux0 node and starting a feed, with no race to win and unlimited retries.\nPR:L - Reaching the stale DVB character devices requires only an unprivileged local account with access to /dev/dvb, which is the norm for the video group on desktops and for the media/DVB application account on the set-top-box and embedded systems that carry these ttpci cards.\nUI:N - No victim action is needed; the leaked and dangling registrations are created automatically during driver probe and remain live until reboot.\nS:U - The freed saa7146_dev object, the leaked budget_av allocation and the orphaned DVB/i2c registrations all live inside the kernel's own security authority, crossing no VM, IOMMU or sandbox boundary.\nC:H - budget->dev is left pointing at kmem_cache memory freed by saa7146_init_one's error path, so subsequent demux/dvr operations read attacker-groomable freed slab contents (including the dev->mem MMIO pointer), a use-after-free that can be leveraged for kernel information disclosure.\nI:H - start_ts_capture() performs saa7146_write() through the freed device's dev->mem pointer, so an attacker who reclaims that slab controls the destination of kernel writel() operations, yielding a write primitive suitable for control-flow hijacking.\nA:H - Beyond the unbounded leak of the budget_av allocation, the DMA page table and the pinned module reference, any access to the orphaned demux/dvr/dvbnet nodes dereferences freed memory and performs MMIO through an iounmap'd mapping, reliably oopsing or panicking the kernel."
}
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}
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"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"title": "media: ttpci: fix two memleaks in budget_av_attach",
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"integrityImpact": "NONE",
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"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "LOW",
"confidentialityImpact": "NONE"
}
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{
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"content": {
"timestamp": "2024-06-06T18:09:11.753345Z",
"id": "CVE-2024-27073",
"options": [
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