io_uring/kbuf: check if target buffer list is still legacy on recycle
In the Linux kernel, the following vulnerability has been resolved: io_uring/kbuf: check if target buffer list is still legacy on recycle There's a gap between when the buffer was grabbed and when it potentially gets recycled, where if the list is empty, someone could've upgraded it to a ring provided type. This can happen if the request is forced via io-wq. The legacy recycling is missing checking if the buffer_list still exists, and if it's of the correct type. Add those checks.
CVE-2026-43366
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-2026-43366
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": "c7fb19428d67dd0a2a78a4f237af01d39c78dc5a",
"lessThan": "a7b33671e418fca507feebd1d56e7f4952a4b25c",
"versionType": "git"
},
{
"status": "affected",
"version": "c7fb19428d67dd0a2a78a4f237af01d39c78dc5a",
"lessThan": "439a6728ec4641ffad1ca796622c19bc525e570f",
"versionType": "git"
},
{
"status": "affected",
"version": "c7fb19428d67dd0a2a78a4f237af01d39c78dc5a",
"lessThan": "f3fb54e7a8b4aadcc2836ee463eec8c88709b8aa",
"versionType": "git"
},
{
"status": "affected",
"version": "c7fb19428d67dd0a2a78a4f237af01d39c78dc5a",
"lessThan": "50ad880db3013c6fee0ef13781762a39e2e7ef83",
"versionType": "git"
},
{
"status": "affected",
"version": "c7fb19428d67dd0a2a78a4f237af01d39c78dc5a",
"lessThan": "97b57f69fee1b61b41acbf37e7720cac9d389fa4",
"versionType": "git"
},
{
"status": "affected",
"version": "c7fb19428d67dd0a2a78a4f237af01d39c78dc5a",
"lessThan": "c2c185be5c85d37215397c8e8781abf0a69bec1f",
"versionType": "git"
}
],
"programFiles": [
"io_uring/kbuf.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": "6.1.167",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.130",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.78",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.19",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "6.19.9",
"versionType": "semver",
"lessThanOrEqual": "6.19.*"
},
{
"status": "unaffected",
"version": "7.0",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"io_uring/kbuf.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-43366
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #40065 · Revision 1
- Added to Heist Feed
- Publisher date