Answer in brief
CVE-2026-43406 records a Critical severity (CVSS 9.1) vulnerability in libceph: prevent potential out-of-bounds reads in process_message_header(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 9.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=cd1a677cad994021b19665ed476aea63f5d54f31 <76ccf21a12c5f6d6790bc32c7da82446d877b2f4 || >=cd1a677cad994021b19665ed476aea63f5d54f31 <75582aaa580c11aed4c7731cad6b068b700e7efb || >=cd1a677cad994021b19665ed476aea63f5d54f31 <50156622eb0888e62541d715a98584480a1bc7cb || >=cd1a677cad994021b19665ed476aea63f5d54f31 <dbd857a9e1e33ea71eaf3e211877027e533770d1 || >=cd1a677cad994021b19665ed476aea63f5d54f31 <69fe5af33fa3806f398d21c081d73c66e5523bc2 || >=cd1a677cad994021b19665ed476aea63f5d54f31 <035867ae6f18df0aeedb2a57a5b74091bd4e3fe8 || >=cd1a677cad994021b19665ed476aea63f5d54f31 <69fb5d91bba44ecf7eb80530b85fa4fb028921d5 | 76ccf21a12c5f6d6790bc32c7da82446d877b2f4, 75582aaa580c11aed4c7731cad6b068b700e7efb, 50156622eb0888e62541d715a98584480a1bc7cb, dbd857a9e1e33ea71eaf3e211877027e533770d1, 69fe5af33fa3806f398d21c081d73c66e5523bc2, 035867ae6f18df0aeedb2a57a5b74091bd4e3fe8, 69fb5d91bba44ecf7eb80530b85fa4fb028921d5 |
| Linux/Linuxgeneric | 5.11 | Not reported |
Published upstream
May 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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.
Quoted source text, attributed separately from HOL analysis.