Answer in brief
CVE-2026-23103 records a High severity (CVSS 7.8) vulnerability in ipvlan: Make the addrs_lock be per port. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (generic), Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
Answer in brief
CVE-2026-23103 records a High severity (CVSS 7.8) vulnerability in ipvlan: Make the addrs_lock be per port. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (generic), Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (generic) and additional mapped packages. 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 7.8. 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), Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (generic), Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=8230819494b3bf284ca7262ac5f877333147b937 <3c149b662cbb202a450e81f938e702ba333864ad || >=8230819494b3bf284ca7262ac5f877333147b937 <70feb16e3fbfb10b15de1396557c38e99f1ab8df || >=8230819494b3bf284ca7262ac5f877333147b937 <88f83e6c9cdb46b8c8ddd0ba01393362963cf589 || >=8230819494b3bf284ca7262ac5f877333147b937 <04ba6de6eff61238e5397c14ac26a6578c7735a5 || >=8230819494b3bf284ca7262ac5f877333147b937 <1f300c10d92c547c3a7d978e1212ff52f18256ed || >=8230819494b3bf284ca7262ac5f877333147b937 <6a81e2db096913d7e43aada1c350c1282e76db39 || >=8230819494b3bf284ca7262ac5f877333147b937 <d3ba32162488283c0a4c5bedd8817aec91748802 | 3c149b662cbb202a450e81f938e702ba333864ad, 70feb16e3fbfb10b15de1396557c38e99f1ab8df, 88f83e6c9cdb46b8c8ddd0ba01393362963cf589, 04ba6de6eff61238e5397c14ac26a6578c7735a5, 1f300c10d92c547c3a7d978e1212ff52f18256ed, 6a81e2db096913d7e43aada1c350c1282e76db39, d3ba32162488283c0a4c5bedd8817aec91748802 |
| Linux/Linuxgeneric | 4.17 | Not reported |
| Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
Published upstream
Feb 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 14, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 14, 2026
In the Linux kernel, the following vulnerability has been resolved: ipvlan: Make the addrs_lock be per port Make the addrs_lock be per port, not per ipvlan dev. Initial code seems to be written in the assumption, that any address change must occur under RTNL. But it is not so for the case of IPv6. So 1) Introduce per-port addrs_lock. 2) It was needed to fix places where it was forgotten to take lock (ipvlan_open/ipvlan_close) This appears to be a very minor problem though. Since it's highly unlikely that ipvlan_add_addr() will be called on 2 CPU simultaneously. But nevertheless, this could cause: 1) False-negative of ipvlan_addr_busy(): one interface iterated through all port->ipvlans + ipvlan->addrs under some ipvlan spinlock, and another added IP under its own lock. Though this is only possible for IPv6, since looks like only ipvlan_addr6_event() can be called without rtnl_lock. 2) Race since ipvlan_ht_addr_add(port) is called under different ipvlan->addrs_lock locks This should not affect performance, since add/remove IP is a rare situation and spinlock is not taken on fast paths.
Quoted source text, attributed separately from HOL analysis.
CVSS is 7.8. 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), Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (generic), Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=8230819494b3bf284ca7262ac5f877333147b937 <3c149b662cbb202a450e81f938e702ba333864ad || >=8230819494b3bf284ca7262ac5f877333147b937 <70feb16e3fbfb10b15de1396557c38e99f1ab8df || >=8230819494b3bf284ca7262ac5f877333147b937 <88f83e6c9cdb46b8c8ddd0ba01393362963cf589 || >=8230819494b3bf284ca7262ac5f877333147b937 <04ba6de6eff61238e5397c14ac26a6578c7735a5 || >=8230819494b3bf284ca7262ac5f877333147b937 <1f300c10d92c547c3a7d978e1212ff52f18256ed || >=8230819494b3bf284ca7262ac5f877333147b937 <6a81e2db096913d7e43aada1c350c1282e76db39 || >=8230819494b3bf284ca7262ac5f877333147b937 <d3ba32162488283c0a4c5bedd8817aec91748802 | 3c149b662cbb202a450e81f938e702ba333864ad, 70feb16e3fbfb10b15de1396557c38e99f1ab8df, 88f83e6c9cdb46b8c8ddd0ba01393362963cf589, 04ba6de6eff61238e5397c14ac26a6578c7735a5, 1f300c10d92c547c3a7d978e1212ff52f18256ed, 6a81e2db096913d7e43aada1c350c1282e76db39, d3ba32162488283c0a4c5bedd8817aec91748802 |
| Linux/Linuxgeneric | 4.17 | Not reported |
| Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
Published upstream
Feb 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 14, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 14, 2026
In the Linux kernel, the following vulnerability has been resolved: ipvlan: Make the addrs_lock be per port Make the addrs_lock be per port, not per ipvlan dev. Initial code seems to be written in the assumption, that any address change must occur under RTNL. But it is not so for the case of IPv6. So 1) Introduce per-port addrs_lock. 2) It was needed to fix places where it was forgotten to take lock (ipvlan_open/ipvlan_close) This appears to be a very minor problem though. Since it's highly unlikely that ipvlan_add_addr() will be called on 2 CPU simultaneously. But nevertheless, this could cause: 1) False-negative of ipvlan_addr_busy(): one interface iterated through all port->ipvlans + ipvlan->addrs under some ipvlan spinlock, and another added IP under its own lock. Though this is only possible for IPv6, since looks like only ipvlan_addr6_event() can be called without rtnl_lock. 2) Race since ipvlan_ht_addr_add(port) is called under different ipvlan->addrs_lock locks This should not affect performance, since add/remove IP is a rare situation and spinlock is not taken on fast paths.
Quoted source text, attributed separately from HOL analysis.