libceph: prevent potential out-of-bounds reads in process_message_header()
In the Linux kernel, the following vulnerability has been resolved: libceph: prevent potential out-of-bounds reads in process_message_header() If the message frame is (maliciously) corrupted in a way that the length of the control segment ends up being less than the size of the message header or a different frame is made to look like a message frame, out-of-bounds reads may ensue in process_message_header(). Perform an explicit bounds check before decoding the message header.
CVE-2026-43406
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-2026-43406
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": "cd1a677cad994021b19665ed476aea63f5d54f31",
"lessThan": "76ccf21a12c5f6d6790bc32c7da82446d877b2f4",
"versionType": "git"
},
{
"status": "affected",
"version": "cd1a677cad994021b19665ed476aea63f5d54f31",
"lessThan": "75582aaa580c11aed4c7731cad6b068b700e7efb",
"versionType": "git"
},
{
"status": "affected",
"version": "cd1a677cad994021b19665ed476aea63f5d54f31",
"lessThan": "50156622eb0888e62541d715a98584480a1bc7cb",
"versionType": "git"
},
{
"status": "affected",
"version": "cd1a677cad994021b19665ed476aea63f5d54f31",
"lessThan": "dbd857a9e1e33ea71eaf3e211877027e533770d1",
"versionType": "git"
},
{
"status": "affected",
"version": "cd1a677cad994021b19665ed476aea63f5d54f31",
"lessThan": "69fe5af33fa3806f398d21c081d73c66e5523bc2",
"versionType": "git"
},
{
"status": "affected",
"version": "cd1a677cad994021b19665ed476aea63f5d54f31",
"lessThan": "035867ae6f18df0aeedb2a57a5b74091bd4e3fe8",
"versionType": "git"
},
{
"status": "affected",
"version": "cd1a677cad994021b19665ed476aea63f5d54f31",
"lessThan": "69fb5d91bba44ecf7eb80530b85fa4fb028921d5",
"versionType": "git"
}
],
"programFiles": [
"net/ceph/messenger_v2.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.11"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.11",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.15.203",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"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": [
"net/ceph/messenger_v2.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-43406
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #40073 · Revision 1
- Added to Heist Feed
- Publisher date