Answer in brief
CVE-2026-23245 records a High severity (CVSS 7.8) vulnerability in net/sched: act_gate: snapshot parameters with RCU on replace. 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 1518-4 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-2026-23245 records a High severity (CVSS 7.8) vulnerability in net/sched: act_gate: snapshot parameters with RCU on replace. 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 1518-4 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 1518-4 PN/DP MFP (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=a51c328df3106663879645680609eb49b3ff6444 <fc98fd8d214693be91253d9a88cdf8e5e143d124 || >=a51c328df3106663879645680609eb49b3ff6444 <8b1251bbf0f10ac745ed74bad4d3b433caa1eeae || >=a51c328df3106663879645680609eb49b3ff6444 <dfc314d7c767e350f78a46a8f8b134f80e8ad432 || >=a51c328df3106663879645680609eb49b3ff6444 <035d0d09d5ab3ed3e93d18cde2b562a6719eea23 || >=a51c328df3106663879645680609eb49b3ff6444 <04d75529dc0f9be78786162ebab7424af4644df2 || >=a51c328df3106663879645680609eb49b3ff6444 <58b162e318d0243ad2d7d92456c0873f2494c351 || >=a51c328df3106663879645680609eb49b3ff6444 <62413a9c3cb183afb9bb6e94dd68caf4e4145f4c | fc98fd8d214693be91253d9a88cdf8e5e143d124, 8b1251bbf0f10ac745ed74bad4d3b433caa1eeae, dfc314d7c767e350f78a46a8f8b134f80e8ad432, 035d0d09d5ab3ed3e93d18cde2b562a6719eea23, 04d75529dc0f9be78786162ebab7424af4644df2, 58b162e318d0243ad2d7d92456c0873f2494c351, 62413a9c3cb183afb9bb6e94dd68caf4e4145f4c |
| Linux/Linuxgeneric | 5.8 | Not reported |
| Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
| Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
Published upstream
Mar 18, 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: net/sched: act_gate: snapshot parameters with RCU on replace The gate action can be replaced while the hrtimer callback or dump path is walking the schedule list. Convert the parameters to an RCU-protected snapshot and swap updates under tcf_lock, freeing the previous snapshot via call_rcu(). When REPLACE omits the entry list, preserve the existing schedule so the effective state is unchanged.
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 1518-4 PN/DP MFP (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=a51c328df3106663879645680609eb49b3ff6444 <fc98fd8d214693be91253d9a88cdf8e5e143d124 || >=a51c328df3106663879645680609eb49b3ff6444 <8b1251bbf0f10ac745ed74bad4d3b433caa1eeae || >=a51c328df3106663879645680609eb49b3ff6444 <dfc314d7c767e350f78a46a8f8b134f80e8ad432 || >=a51c328df3106663879645680609eb49b3ff6444 <035d0d09d5ab3ed3e93d18cde2b562a6719eea23 || >=a51c328df3106663879645680609eb49b3ff6444 <04d75529dc0f9be78786162ebab7424af4644df2 || >=a51c328df3106663879645680609eb49b3ff6444 <58b162e318d0243ad2d7d92456c0873f2494c351 || >=a51c328df3106663879645680609eb49b3ff6444 <62413a9c3cb183afb9bb6e94dd68caf4e4145f4c | fc98fd8d214693be91253d9a88cdf8e5e143d124, 8b1251bbf0f10ac745ed74bad4d3b433caa1eeae, dfc314d7c767e350f78a46a8f8b134f80e8ad432, 035d0d09d5ab3ed3e93d18cde2b562a6719eea23, 04d75529dc0f9be78786162ebab7424af4644df2, 58b162e318d0243ad2d7d92456c0873f2494c351, 62413a9c3cb183afb9bb6e94dd68caf4e4145f4c |
| Linux/Linuxgeneric | 5.8 | Not reported |
| Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
| Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
Published upstream
Mar 18, 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: net/sched: act_gate: snapshot parameters with RCU on replace The gate action can be replaced while the hrtimer callback or dump path is walking the schedule list. Convert the parameters to an RCU-protected snapshot and swap updates under tcf_lock, freeing the previous snapshot via call_rcu(). When REPLACE omits the entry list, preserve the existing schedule so the effective state is unchanged.
Quoted source text, attributed separately from HOL analysis.