CVE-2022-50541

published 2025-10-07

CVE-2022-50541: In the Linux kernel, the following vulnerability has been resolved: dmaengine: ti: k3-udma: Reset UDMA_CHAN_RT byte counters to prevent overflow…

Priority P4 21 medium 5.5 CVSS 3.1

AV L AC L PR L UI N S U C N I N A H

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

dmaengine: ti: k3-udma: Reset UDMA_CHAN_RT byte counters to prevent overflow

UDMA_CHAN_RT_*BCNT_REG stores the real-time channel bytecount statistics.
These registers are 32-bit hardware counters and the driver uses these
counters to monitor the operational progress status for a channel, when
transferring more than 4GB of data it was observed that these counters
overflow and completion calculation of a operation gets affected and the
transfer hangs indefinitely.

This commit adds changes to decrease the byte count for every complete
transaction so that these registers never overflow and the proper byte
count statistics is maintained for ongoing transaction by the RT counters.

Earlier uc->bcnt used to maintain a count of the completed bytes at driver
side, since the RT counters maintain the statistics of current transaction
now, the maintenance of uc->bcnt is not necessary.

Affected

12 ranges

Vendor	Product	Version range	Fixed in
debian	linux	< linux 6.0.3-1 (bookworm)	linux 6.0.3-1 (bookworm)
linux	linux	—	—
linux	linux	>= 25dcb5dd7b7ce5587c1df18f584ff78f51a68a94 < d68da10b0cceb4177b653833e794b2923a4ffbd7	d68da10b0cceb4177b653833e794b2923a4ffbd7
linux	linux	>= 25dcb5dd7b7ce5587c1df18f584ff78f51a68a94 < e0b16bfbd3a4a8d09614046335f4482313e7c0c4	e0b16bfbd3a4a8d09614046335f4482313e7c0c4
linux	linux	>= 25dcb5dd7b7ce5587c1df18f584ff78f51a68a94 < a065657643a62a24b4435ddcaea45f1e9378749e	a065657643a62a24b4435ddcaea45f1e9378749e
linux	linux	>= 25dcb5dd7b7ce5587c1df18f584ff78f51a68a94 < 7c94dcfa8fcff2dba53915f1dabfee49a3df8b88	7c94dcfa8fcff2dba53915f1dabfee49a3df8b88
linux	linux_kernel	>= 0 < 6.0.3-1	6.0.3-1
linux	linux_kernel	>= 0 < 6.0.3-1	6.0.3-1
linux	linux_kernel	>= 0 < 6.0.3-1	6.0.3-1
linux	linux_kernel	>= 5.16 < 5.19.17	5.19.17
linux	linux_kernel	>= 5.6 < 5.15.75	5.15.75
linux	linux_kernel	>= 6.0 < 6.0.3	6.0.3

CVSS provenance

nvd v3.1 5.5 MEDIUM CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

osv 5.5 MEDIUM

vendor_debian 5.5 MEDIUM

vendor_redhat 5.5 MEDIUM

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