Riskcovery

CVE-2026-72149

dmaengine: tegra: Fix burst size calculation

State
Published
Severity
7.5 High
Published
Aug 15, 2026
Updated
Oct 16, 2026
Reserved
Aug 9, 2026

Read the record on cve.org

Description

In the Linux kernel, the following vulnerability has been resolved:

dmaengine: tegra: Fix burst size calculation

Currently, the Tegra GPC DMA hardware requires the transfer length to be a multiple of the max burst size configured for the channel. When a client requests a transfer where the length is not evenly divisible by the configured max burst size, the DMA hangs with partial burst at the end.

Fix this by reducing the burst size to the largest power-of-2 value that evenly divides the transfer length. For example, a 40-byte transfer with a 16-byte max burst will now use an 8-byte burst (40 / 8 = 5 complete bursts) instead of causing a hang.

This issue was observed with the PL011 UART driver where TX DMA transfers of arbitrary lengths were stuck.

Scores

CVSSScoreVectorSource
3.17.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HLinux

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • ee17028009d49fffed8cc963455d33b1fd3f1d08 to before 735951baa311c66353405dcac39375dd66441db0Affected
  • ee17028009d49fffed8cc963455d33b1fd3f1d08 to before 8f0f5de1091119679d87f60dfb1acbff4b2a0ed3Affected
  • ee17028009d49fffed8cc963455d33b1fd3f1d08 to before a3b76b54e06d73166af4d1a284a0e0711889060cAffected
  • ee17028009d49fffed8cc963455d33b1fd3f1d08 to before 7926c1e4be86379945fb5f168888ac4d2aaf6c91Affected
  • ee17028009d49fffed8cc963455d33b1fd3f1d08 to before 6e37e9e230c7e848bd8e8cd4db15bb18bcf11ad1Affected
  • ee17028009d49fffed8cc963455d33b1fd3f1d08 to before 4651df83b6c796daead3447e8fd874322918ee4fAffected
LinuxLinux
  • 5.19Affected
  • before 5.19Not affected
  • 6.1.178 through 6.1.*Not affected
  • 6.6.145 through 6.6.*Not affected
  • 6.12.97 through 6.12.*Not affected
  • 6.18.40 through 6.18.*Not affected
  • 7.1.5 through 7.1.*Not affected
  • 7.2 and laterNot affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.