dmaengine: tegra: Fix burst size calculation
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.
CVE-2026-72149
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-2026-72149
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": "ee17028009d49fffed8cc963455d33b1fd3f1d08",
"lessThan": "735951baa311c66353405dcac39375dd66441db0",
"versionType": "git"
},
{
"status": "affected",
"version": "ee17028009d49fffed8cc963455d33b1fd3f1d08",
"lessThan": "8f0f5de1091119679d87f60dfb1acbff4b2a0ed3",
"versionType": "git"
},
{
"status": "affected",
"version": "ee17028009d49fffed8cc963455d33b1fd3f1d08",
"lessThan": "a3b76b54e06d73166af4d1a284a0e0711889060c",
"versionType": "git"
},
{
"status": "affected",
"version": "ee17028009d49fffed8cc963455d33b1fd3f1d08",
"lessThan": "7926c1e4be86379945fb5f168888ac4d2aaf6c91",
"versionType": "git"
},
{
"status": "affected",
"version": "ee17028009d49fffed8cc963455d33b1fd3f1d08",
"lessThan": "6e37e9e230c7e848bd8e8cd4db15bb18bcf11ad1",
"versionType": "git"
},
{
"status": "affected",
"version": "ee17028009d49fffed8cc963455d33b1fd3f1d08",
"lessThan": "4651df83b6c796daead3447e8fd874322918ee4f",
"versionType": "git"
}
],
"programFiles": [
"drivers/dma/tegra186-gpc-dma.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.19"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.19",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.178",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.145",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.97",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.40",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.5",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/dma/tegra186-gpc-dma.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-72149
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #32960 · Revision 1
- Added to Heist Feed
- Publisher date