cxl/mbox: Break poison list loop on an empty payload
In the Linux kernel, the following vulnerability has been resolved: cxl/mbox: Break poison list loop on an empty payload A device that returns count == 0 with CXL_POISON_FLAG_MORE set on every iteration never advances nr_records, so the max_errors guard never trips and the do/while loops forever while holding poison.mutex. That hangs the sysfs-triggered scan thread and blocks all subsequent poison operations on the device. The existing "Protect against an uncleared _FLAG_MORE" guard was intended to bound a misbehaving device but does not cover the count == 0 case. Stop the loop on an empty payload so a malfunctioning or malicious device cannot wedge the poison scan.
CVE-2026-93097
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-2026-93097
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": "ed83f7ca398b3798b82c1d5d1113011c0e5a2198",
"lessThan": "86771c105293ca26bfcc320b4f60d32c137b54aa",
"versionType": "git"
},
{
"status": "affected",
"version": "ed83f7ca398b3798b82c1d5d1113011c0e5a2198",
"lessThan": "42eab80981f4d2ac820e253e80ecf92f8cd91f69",
"versionType": "git"
},
{
"status": "affected",
"version": "ed83f7ca398b3798b82c1d5d1113011c0e5a2198",
"lessThan": "6ad491cef1a812cf7b53aa769cd8869516c47362",
"versionType": "git"
},
{
"status": "affected",
"version": "ed83f7ca398b3798b82c1d5d1113011c0e5a2198",
"lessThan": "e77594e0cea67ab1c2317a27aa77a744e26ad6a6",
"versionType": "git"
},
{
"status": "affected",
"version": "ed83f7ca398b3798b82c1d5d1113011c0e5a2198",
"lessThan": "8b301c4afbce4bc3f94528441d8d5ce1366504ad",
"versionType": "git"
}
],
"programFiles": [
"drivers/cxl/core/mbox.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.4"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.4",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.110",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.52",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.6",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/cxl/core/mbox.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-93097
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #37825 · Revision 1
- Added to Heist Feed
- Publisher date