dmaengine: tegra-adma: Fix use-after-free
In the Linux kernel, the following vulnerability has been resolved: dmaengine: tegra-adma: Fix use-after-free A use-after-free bug exists in the Tegra ADMA driver when audio streams are terminated, particularly during XRUN conditions. The issue occurs when the DMA buffer is freed by tegra_adma_terminate_all() before the vchan completion tasklet finishes accessing it. The race condition follows this sequence: 1. DMA transfer completes, triggering an interrupt that schedules the completion tasklet (tasklet has not executed yet) 2. Audio playback stops, calling tegra_adma_terminate_all() which frees the DMA buffer memory via kfree() 3. The scheduled tasklet finally executes, calling vchan_complete() which attempts to access the already-freed memory Since tasklets can execute at any time after being scheduled, there is no guarantee that the buffer will remain valid when vchan_complete() runs. Fix this by properly synchronizing the virtual channel completion: - Calling vchan_terminate_vdesc() in tegra_adma_stop() to mark the descriptors as terminated instead of freeing the descriptor. - Add the callback tegra_adma_synchronize() that calls vchan_synchronize() which kills any pending tasklets and frees any terminated descriptors. Crash logs: [ 337.427523] BUG: KASAN: use-after-free in vchan_complete+0x124/0x3b0 [ 337.427544] Read of size 8 at addr ffff000132055428 by task swapper/0/0 [ 337.427562] Call trace: [ 337.427564] dump_backtrace+0x0/0x320 [ 337.427571] show_stack+0x20/0x30
CVE-2025-71162
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2025-71162
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "f46b195799b5cb05338e7c44cb3617eacb56d755",
"lessThan": "5f8d1d66a952d0396671e1f21ff8127a4d14fb4e",
"versionType": "git"
},
{
"status": "affected",
"version": "f46b195799b5cb05338e7c44cb3617eacb56d755",
"lessThan": "76992310f80776b4d1f7f8915f59b92883a3e44c",
"versionType": "git"
},
{
"status": "affected",
"version": "f46b195799b5cb05338e7c44cb3617eacb56d755",
"lessThan": "ae3eed72de682ddbba507ed2d6b848c21a6b721e",
"versionType": "git"
},
{
"status": "affected",
"version": "f46b195799b5cb05338e7c44cb3617eacb56d755",
"lessThan": "59cb421b0902fbef2b9512ae8ba198a20f26b41f",
"versionType": "git"
},
{
"status": "affected",
"version": "f46b195799b5cb05338e7c44cb3617eacb56d755",
"lessThan": "cb2c9c4bb1322cc3c9984ad17db8cdd2663879ca",
"versionType": "git"
},
{
"status": "affected",
"version": "f46b195799b5cb05338e7c44cb3617eacb56d755",
"lessThan": "be655c3736b3546f39bc8116ffbf2a3b6cac96c4",
"versionType": "git"
},
{
"status": "affected",
"version": "f46b195799b5cb05338e7c44cb3617eacb56d755",
"lessThan": "2efd07a7c36949e6fa36a69183df24d368bf9e96",
"versionType": "git"
}
],
"programFiles": [
"drivers/dma/tegra210-adma.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.7"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.7",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.249",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.199",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.162",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.122",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.67",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.7",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "6.19",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/dma/tegra210-adma.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2025-71162
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #27143 · Revision 1
- Added to Heist Feed
- Publisher date