Answer in brief
CVE-2026-46266 records a Unknown severity vulnerability in inet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP. 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.
A CVSS score is not reported in the current record. 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.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <db76b75ede3810e7cf9cfea5067d4f3e0993768b || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <19e42490c89bac9a388f28179e66bebbef350f99 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <531c1aec81bfe19d00af13da5531fbb8209e4bd2 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <719d3932b8f6e3348ce2f0ac58e278301fc17575 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c89477ad79446867394360b29bb801010fc3ff22 | db76b75ede3810e7cf9cfea5067d4f3e0993768b, 19e42490c89bac9a388f28179e66bebbef350f99, 531c1aec81bfe19d00af13da5531fbb8209e4bd2, 719d3932b8f6e3348ce2f0ac58e278301fc17575, c89477ad79446867394360b29bb801010fc3ff22 |
| Linux/Linuxgeneric | 2.6.12 | Not reported |
Published upstream
Jun 3, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 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: inet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP Yizhou Zhao reported that simply having one RAW socket on protocol IPPROTO_RAW (255) was dangerous. socket(AF_INET, SOCK_RAW, 255); A malicious incoming ICMP packet can set the protocol field to 255 and match this socket, leading to FNHE cache changes. inner = IP(src="192.168.2.1", dst="8.8.8.8", proto=255)/Raw("TEST") pkt = IP(src="192.168.1.1", dst="192.168.2.1")/ICMP(type=3, code=4, nexthopmtu=576)/inner "man 7 raw" states: A protocol of IPPROTO_RAW implies enabled IP_HDRINCL and is able to send any IP protocol that is specified in the passed header. Receiving of all IP protocols via IPPROTO_RAW is not possible using raw sockets. Make sure we drop these malicious packets.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-46266 records a Unknown severity vulnerability in inet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP. 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.
A CVSS score is not reported in the current record. 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.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <db76b75ede3810e7cf9cfea5067d4f3e0993768b || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <19e42490c89bac9a388f28179e66bebbef350f99 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <531c1aec81bfe19d00af13da5531fbb8209e4bd2 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <719d3932b8f6e3348ce2f0ac58e278301fc17575 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c89477ad79446867394360b29bb801010fc3ff22 | db76b75ede3810e7cf9cfea5067d4f3e0993768b, 19e42490c89bac9a388f28179e66bebbef350f99, 531c1aec81bfe19d00af13da5531fbb8209e4bd2, 719d3932b8f6e3348ce2f0ac58e278301fc17575, c89477ad79446867394360b29bb801010fc3ff22 |
| Linux/Linuxgeneric | 2.6.12 | Not reported |
Published upstream
Jun 3, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 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: inet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP Yizhou Zhao reported that simply having one RAW socket on protocol IPPROTO_RAW (255) was dangerous. socket(AF_INET, SOCK_RAW, 255); A malicious incoming ICMP packet can set the protocol field to 255 and match this socket, leading to FNHE cache changes. inner = IP(src="192.168.2.1", dst="8.8.8.8", proto=255)/Raw("TEST") pkt = IP(src="192.168.1.1", dst="192.168.2.1")/ICMP(type=3, code=4, nexthopmtu=576)/inner "man 7 raw" states: A protocol of IPPROTO_RAW implies enabled IP_HDRINCL and is able to send any IP protocol that is specified in the passed header. Receiving of all IP protocols via IPPROTO_RAW is not possible using raw sockets. Make sure we drop these malicious packets.
Quoted source text, attributed separately from HOL analysis.