dmaengine: tegra-adma: Fix use-after-free

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2025-71162
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-01-25 15:15:53 UTC
Updated2026-07-14 13:18:04 UTC
DescriptionIn 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 [ 337.427575] dump_stack_lvl+0x68/0x84 [ 337.427584] print_address_description.constprop.0+0x74/0x2b8 [ 337.427590] kasan_report+0x1f4/0x210 [ 337.427598] __asan_load8+0xa0/0xd0 [ 337.427603] vchan_complete+0x124/0x3b0 [ 337.427609] tasklet_action_common.constprop.0+0x190/0x1d0 [ 337.427617] tasklet_action+0x30/0x40 [ 337.427623] __do_softirq+0x1a0/0x5c4 [ 337.427628] irq_exit+0x110/0x140 [ 337.427633] handle_domain_irq+0xa4/0xe0 [ 337.427640] gic_handle_irq+0x64/0x160 [ 337.427644] call_on_irq_stack+0x20/0x4c [ 337.427649] do_interrupt_handler+0x7c/0x90 [ 337.427654] el1_interrupt+0x30/0x80 [ 337.427659] el1h_64_irq_handler+0x18/0x30 [ 337.427663] el1h_64_irq+0x7c/0x80 [ 337.427667] cpuidle_enter_state+0xe4/0x540 [ 337.427674] cpuidle_enter+0x54/0x80 [ 337.427679] do_idle+0x2e0/0x380 [ 337.427685] cpu_startup_entry+0x2c/0x70 [ 337.427690] rest_init+0x114/0x130 [ 337.427695] arch_call_rest_init+0x18/0x24 [ 337.427702] start_kernel+0x380/0x3b4 [ 337.427706] __primary_switched+0xc0/0xc8

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Problem Types: CWE-416

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected f46b195799b5cb05338e7c44cb3617eacb56d755 5f8d1d66a952d0396671e1f21ff8127a4d14fb4e git Not specified
CNA Linux Linux affected f46b195799b5cb05338e7c44cb3617eacb56d755 76992310f80776b4d1f7f8915f59b92883a3e44c git Not specified
CNA Linux Linux affected f46b195799b5cb05338e7c44cb3617eacb56d755 ae3eed72de682ddbba507ed2d6b848c21a6b721e git Not specified
CNA Linux Linux affected f46b195799b5cb05338e7c44cb3617eacb56d755 59cb421b0902fbef2b9512ae8ba198a20f26b41f git Not specified
CNA Linux Linux affected f46b195799b5cb05338e7c44cb3617eacb56d755 cb2c9c4bb1322cc3c9984ad17db8cdd2663879ca git Not specified
CNA Linux Linux affected f46b195799b5cb05338e7c44cb3617eacb56d755 be655c3736b3546f39bc8116ffbf2a3b6cac96c4 git Not specified
CNA Linux Linux affected f46b195799b5cb05338e7c44cb3617eacb56d755 2efd07a7c36949e6fa36a69183df24d368bf9e96 git Not specified
CNA Linux Linux affected 4.7 Not specified
CNA Linux Linux unaffected 4.7 semver Not specified
CNA Linux Linux unaffected 5.10.249 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.199 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.162 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.122 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.67 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.7 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19 * original_commit_for_fix Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.6 * custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.6 * custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.6 * custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.6 * custom Not specified
ADP Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.6 * custom Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/ae3eed72de682ddbba507ed2d6b848c21a6b721e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
cert-portal.siemens.com/productcert/html/ssa-019113.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
git.kernel.org/stable/c/59cb421b0902fbef2b9512ae8ba198a20f26b41f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/cb2c9c4bb1322cc3c9984ad17db8cdd2663879ca 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/2efd07a7c36949e6fa36a69183df24d368bf9e96 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/76992310f80776b4d1f7f8915f59b92883a3e44c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/be655c3736b3546f39bc8116ffbf2a3b6cac96c4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/5f8d1d66a952d0396671e1f21ff8127a4d14fb4e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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