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vuln-cve/data/2025/71xxx/CVE-2025-71162.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2025-71162",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2026-01-13T15:30:19.666Z",
"datePublished": "2026-01-25T14:36:09.029Z",
"dateUpdated": "2026-11-10T12:39:20.084Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-08-05T12:12:27.337Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: tegra-adma: Fix use-after-free\n\nA use-after-free bug exists in the Tegra ADMA driver when audio streams\nare terminated, particularly during XRUN conditions. The issue occurs\nwhen the DMA buffer is freed by tegra_adma_terminate_all() before the\nvchan completion tasklet finishes accessing it.\n\nThe race condition follows this sequence:\n\n 1. DMA transfer completes, triggering an interrupt that schedules the\n completion tasklet (tasklet has not executed yet)\n 2. Audio playback stops, calling tegra_adma_terminate_all() which\n frees the DMA buffer memory via kfree()\n 3. The scheduled tasklet finally executes, calling vchan_complete()\n which attempts to access the already-freed memory\n\nSince tasklets can execute at any time after being scheduled, there is\nno guarantee that the buffer will remain valid when vchan_complete()\nruns.\n\nFix this by properly synchronizing the virtual channel completion:\n - Calling vchan_terminate_vdesc() in tegra_adma_stop() to mark the\n descriptors as terminated instead of freeing the descriptor.\n - Add the callback tegra_adma_synchronize() that calls\n vchan_synchronize() which kills any pending tasklets and frees any\n terminated descriptors.\n\nCrash logs:\n[ 337.427523] BUG: KASAN: use-after-free in vchan_complete+0x124/0x3b0\n[ 337.427544] Read of size 8 at addr ffff000132055428 by task swapper/0/0\n\n[ 337.427562] Call trace:\n[ 337.427564] dump_backtrace+0x0/0x320\n[ 337.427571] show_stack+0x20/0x30\n[ 337.427575] dump_stack_lvl+0x68/0x84\n[ 337.427584] print_address_description.constprop.0+0x74/0x2b8\n[ 337.427590] kasan_report+0x1f4/0x210\n[ 337.427598] __asan_load8+0xa0/0xd0\n[ 337.427603] vchan_complete+0x124/0x3b0\n[ 337.427609] tasklet_action_common.constprop.0+0x190/0x1d0\n[ 337.427617] tasklet_action+0x30/0x40\n[ 337.427623] __do_softirq+0x1a0/0x5c4\n[ 337.427628] irq_exit+0x110/0x140\n[ 337.427633] handle_domain_irq+0xa4/0xe0\n[ 337.427640] gic_handle_irq+0x64/0x160\n[ 337.427644] call_on_irq_stack+0x20/0x4c\n[ 337.427649] do_interrupt_handler+0x7c/0x90\n[ 337.427654] el1_interrupt+0x30/0x80\n[ 337.427659] el1h_64_irq_handler+0x18/0x30\n[ 337.427663] el1h_64_irq+0x7c/0x80\n[ 337.427667] cpuidle_enter_state+0xe4/0x540\n[ 337.427674] cpuidle_enter+0x54/0x80\n[ 337.427679] do_idle+0x2e0/0x380\n[ 337.427685] cpu_startup_entry+0x2c/0x70\n[ 337.427690] rest_init+0x114/0x130\n[ 337.427695] arch_call_rest_init+0x18/0x24\n[ 337.427702] start_kernel+0x380/0x3b4\n[ 337.427706] __primary_switched+0xc0/0xc8"
}
],
"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 locally through ALSA PCM device ioctls that flow through ASoC and DMAengine into the Tegra ADMA driver; it is not packet-facing.\nAC:L - The attacker controls stream setup, period sizing, and repeated start/termination while causing the hardware period interrupts. A public looped reproducer reliably drives the race window.\nPR:L - No capability or namespace privilege check exists; the process needs only ordinary permission to open the ALSA PCM device, commonly granted to an unprivileged audio-session user.\nUI:N - The attacker can configure, start, and terminate their own PCM stream or induce its XRUN without any separate victim action.\nS:U - The corruption and its effects remain within the host kernel security authority; this is not a guest-host, IOMMU, or other security-boundary bypass.\nC:H - The freed kmalloc-256 descriptor is subsequently dereferenced for callback fields; reclaiming it can enable attacker-influenced kernel execution and arbitrary kernel-memory disclosure.\nI:H - vchan_complete() reads function pointers and a callback parameter from the freed descriptor and invokes a callback, supporting control-flow hijacking and arbitrary kernel modification.\nA:H - The KASAN-confirmed use-after-free can cause a kernel oops or panic, and the attacker can repeat the stream termination or XRUN sequence."
}
]
}
],
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{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"drivers/dma/tegra210-adma.c"
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"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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{
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"status": "unaffected",
"versionType": "semver"
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{
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"lessThanOrEqual": "5.10.*",
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{
"version": "5.15.199",
"lessThanOrEqual": "5.15.*",
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{
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"cpeApplicability": [
{
"nodes": [
{
"operator": "OR",
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"cpeMatch": [
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{
"url": "https://git.kernel.org/stable/c/2efd07a7c36949e6fa36a69183df24d368bf9e96"
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"title": "dmaengine: tegra-adma: Fix use-after-free",
"x_generator": {
"engine": "bippy-1.2.0"
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}
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