ring-buffer: Check resize_disabled before publishing the new subbuf order
In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Check resize_disabled before publishing the new subbuf order ring_buffer_subbuf_order_set() stores the new order and only then walks the CPUs, returning -EBUSY if any of them has resizing disabled. A user mapped buffer has resizing disabled, and __rb_map_vma() reads buffer->subbuf_order without buffer->mutex, so an mmap of an already mapped CPU racing the failing order change sizes the mapping with the new order and inserts pages past the sub-buffer into the VMA. Check the CPUs before storing the new order.
CVE-2026-97617
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-2026-97617
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": "117c39200d9d760cbd5944bb89efb7b9c51965aa",
"lessThan": "f2099644e1b2a2c0805c5240d63ab0522d9d0174",
"versionType": "git"
},
{
"status": "affected",
"version": "117c39200d9d760cbd5944bb89efb7b9c51965aa",
"lessThan": "9fd4ea952e6ac12a63c3fe89f08ad02771aa2c06",
"versionType": "git"
},
{
"status": "affected",
"version": "117c39200d9d760cbd5944bb89efb7b9c51965aa",
"lessThan": "32bf47db9237c5b8b6f6aaa5356bb4c79d241f76",
"versionType": "git"
},
{
"status": "affected",
"version": "117c39200d9d760cbd5944bb89efb7b9c51965aa",
"lessThan": "d860c67c051685abb0460b593b193f0f45f4fa92",
"versionType": "git"
}
],
"programFiles": [
"kernel/trace/ring_buffer.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.10"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.10",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.111",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.53",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.7",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"kernel/trace/ring_buffer.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-97617
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #38053 · Revision 1
- Added to Heist Feed
- Publisher date