usb: xhci: Fix invalid pointer dereference in Etron workaround
In the Linux kernel, the following vulnerability has been resolved: usb: xhci: Fix invalid pointer dereference in Etron workaround This check is performed before prepare_transfer() and prepare_ring(), so enqueue can already point at the final link TRB of a segment. And indeed it will, some 0.4% of times this code is called. Then enqueue + 1 is an invalid pointer. It will crash the kernel right away or load some junk which may look like a link TRB and cause the real link TRB to be replaced with a NOOP. This wouldn't end well. Use a functionally equivalent test which doesn't dereference the pointer and always gives correct result. Something has crashed my machine twice in recent days while playing with an Etron HC, and a control transfer stress test ran for confirmation has just crashed it again. The same test passes with this patch applied.
CVE-2025-37813
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-2025-37813
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": "fbc0a0c7718a6cb1dc5e0811a4f88a2b1deedfa1",
"lessThan": "142273a49f2c315eabdbdf5a71c15e479b75ca91",
"versionType": "git"
},
{
"status": "affected",
"version": "9258c9ed32294ce3a4b58c9d92fc49ba030d35c9",
"lessThan": "bce3055b08e303e28a8751f6073066f5c33a0744",
"versionType": "git"
},
{
"status": "affected",
"version": "5e1c67abc9301d05130b7e267c204e7005503b33",
"lessThan": "0624e29c595b05e7a0e6d1c368f0a05799928e30",
"versionType": "git"
},
{
"status": "affected",
"version": "5e1c67abc9301d05130b7e267c204e7005503b33",
"lessThan": "1ea050da5562af9b930d17cbbe9632d30f5df43a",
"versionType": "git"
},
{
"status": "affected",
"version": "4725344ca645a98a9d8e45e25b01a2244de5b8aa",
"versionType": "git"
},
{
"status": "affected",
"version": "6.6.66",
"lessThan": "6.6.89",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.12.2",
"lessThan": "6.12.26",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.11.11",
"lessThan": "6.12",
"versionType": "semver"
}
],
"programFiles": [
"drivers/usb/host/xhci-ring.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.13"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.13",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.89",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.26",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.14.5",
"versionType": "semver",
"lessThanOrEqual": "6.14.*"
},
{
"status": "unaffected",
"version": "6.15",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/usb/host/xhci-ring.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2025-37813
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #30477 · Revision 1
- Added to Heist Feed
- Publisher date