138 lines
8.2 KiB
JSON
138 lines
8.2 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-2025-39696",
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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": "2025-04-16T07:20:57.114Z",
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"datePublished": "2025-09-05T17:21:02.068Z",
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"dateUpdated": "2026-08-05T12:04:37.787Z"
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},
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T12:04:37.787Z"
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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\nALSA: hda: tas2781: Fix wrong reference of tasdevice_priv\n\nDuring the conversion to unify the calibration data management, the\nreference to tasdevice_priv was wrongly set to h->hda_priv instead of\nh->priv. This resulted in memory corruption and crashes eventually.\nUnfortunately it's a void pointer, hence the compiler couldn't know\nthat it's wrong."
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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 corruption occurs in the tas2781 HDA I2C codec driver's firmware-ready callback during local driver bind; there is no network, adjacent-network, or peer-supplied data path into `tas2563_save_calibration()`. Exploiting the resulting kernel heap corruption requires local presence on the affected machine.\nAC:L - The wrong pointer is dereferenced unconditionally every time `tasdev_fw_ready()` runs on a TAS2563 (ACPI HID INT8866) system — no race, no timing window, and no memory-layout precondition the attacker cannot influence. The driver is enabled in stock distro kernels and the hardware is common in consumer Lenovo laptops, so this is not a rare-config case.\nPR:L - No capability, credential, or privilege check exists anywhere on the path — the corruption fires from a kernel firmware-load worker at boot, before any authentication. A plain unprivileged local account on the affected system is sufficient to be positioned to leverage the resulting heap damage, so Low rather than High.\nUI:N - The vulnerable code is reached automatically from the asynchronous `request_firmware_nowait()` completion callback during device probe/bind; no victim must log in, mount anything, open a device node, or take any other action.\nS:U - The type confusion corrupts kernel heap memory belonging to the same kernel that hosts the vulnerable driver, with no crossing of a VM, IOMMU, or sandbox boundary. Impact and vulnerable component share one security authority.\nC:H - The function performs OOB reads of `p->dev` and `p->ndev` hundreds/thousands of bytes past a 24-byte allocation and writes a live kernel heap pointer (`cd->data`) into an unrelated adjacent object, which can surface kernel addresses to userspace and defeat KASLR. Heap corruption of this kind is leverageable into broader memory disclosure.\nI:H - This is an out-of-bounds write: `cali_dat_sz_per_dev`, `total_sz`, `data`, and the five `cali_reg` fields are written ~790–810 bytes beyond the object, and `devm_kzalloc()` performs a list insertion through an uncontrolled `struct device *`, giving a write through a wild pointer. OOB write plus type confusion is High integrity impact under the standard treatment.\nA:H - The maintainer explicitly states this \"resulted in memory corruption and crashes eventually\"; dereferencing the garbage `p->dev` inside `devm_kzalloc()` (spinlock acquisition and list_add at an arbitrary address) reliably produces an oops or panic, and the corrupted neighbouring heap objects cause later crashes. Any kernel crash is High."
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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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"sound/hda/codecs/side-codecs/tas2781_hda_i2c.c"
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],
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"versions": [
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{
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"version": "4fe238513407d83f38bf5782e8bcdd7b8baeb85d",
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"lessThan": "2812815aa79637d39d4398ecd7e58f65d1c79231",
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"status": "affected",
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"versionType": "git"
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"lessThan": "3f4422e7c9436abf81a00270be7e4d6d3760ec0e",
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"status": "affected",
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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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"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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"sound/hda/codecs/side-codecs/tas2781_hda_i2c.c"
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],
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"versions": [
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{
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"version": "6.16",
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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": "6.16",
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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": "6.16.4",
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"lessThanOrEqual": "6.16.*",
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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": "6.17",
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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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"versionStartIncluding": "6.16",
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"versionEndExcluding": "6.16.4"
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},
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{
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"vulnerable": true,
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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/2812815aa79637d39d4398ecd7e58f65d1c79231"
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},
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{
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"url": "https://git.kernel.org/stable/c/3f4422e7c9436abf81a00270be7e4d6d3760ec0e"
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}
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],
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"title": "ALSA: hda: tas2781: Fix wrong reference of tasdevice_priv",
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