CVE-2026-43406

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Source
https://cve.org/CVERecord?id=CVE-2026-43406
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-43406.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-43406
Downstream
Related
Published
2026-05-08T14:21:46.246Z
Modified
2026-06-24T09:14:07.692263467Z
Severity
  • 9.1 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H CVSS Calculator
Summary
libceph: prevent potential out-of-bounds reads in process_message_header()
Details

In the Linux kernel, the following vulnerability has been resolved:

libceph: prevent potential out-of-bounds reads in processmessageheader()

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 processmessageheader().

Perform an explicit bounds check before decoding the message header.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43406.json",
    "cna_assigner": "Linux"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
cd1a677cad994021b19665ed476aea63f5d54f31
Fixed
76ccf21a12c5f6d6790bc32c7da82446d877b2f4
Fixed
75582aaa580c11aed4c7731cad6b068b700e7efb
Fixed
50156622eb0888e62541d715a98584480a1bc7cb
Fixed
dbd857a9e1e33ea71eaf3e211877027e533770d1
Fixed
69fe5af33fa3806f398d21c081d73c66e5523bc2
Fixed
035867ae6f18df0aeedb2a57a5b74091bd4e3fe8
Fixed
69fb5d91bba44ecf7eb80530b85fa4fb028921d5

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-43406.json"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
5.11.0
Fixed
5.15.203
Type
ECOSYSTEM
Events
Introduced
5.16.0
Fixed
6.1.167
Type
ECOSYSTEM
Events
Introduced
6.2.0
Fixed
6.6.130
Type
ECOSYSTEM
Events
Introduced
6.7.0
Fixed
6.12.78
Type
ECOSYSTEM
Events
Introduced
6.13.0
Fixed
6.18.19
Type
ECOSYSTEM
Events
Introduced
6.19.0
Fixed
6.19.9

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-43406.json"