Answer in brief
CVE-2025-37914 records a Unknown severity vulnerability in net_sched: ets: Fix double list add in class with netem as child qdisc. 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.
Answer in brief
CVE-2025-37914 records a Unknown severity vulnerability in net_sched: ets: Fix double list add in class with netem as child qdisc. 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 | >=dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33 <24388ba0a1b1b6d4af1b205927ac7f7b119ee4ea || >=dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33 <554acc5a2ea9703e08023eb9a003f9e5a830a502 || >=dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33 <9efb6a0fa88e0910d079fdfeb4f7ce4d4ac6c990 || >=dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33 <72c3da7e6ceb74e74ddbb5a305a35c9fdfcac6e3 || >=dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33 <1f01e9f961605eb397c6ecd1d7b0233dfbf9077c || >=dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33 <bc321f714de693aae06e3786f88df2975376d996 || >=dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33 <1a6d0c00fa07972384b0c308c72db091d49988b6 | 24388ba0a1b1b6d4af1b205927ac7f7b119ee4ea, 554acc5a2ea9703e08023eb9a003f9e5a830a502, 9efb6a0fa88e0910d079fdfeb4f7ce4d4ac6c990, 72c3da7e6ceb74e74ddbb5a305a35c9fdfcac6e3, 1f01e9f961605eb397c6ecd1d7b0233dfbf9077c, bc321f714de693aae06e3786f88df2975376d996, 1a6d0c00fa07972384b0c308c72db091d49988b6 |
| Linux/Linuxgeneric | 5.6 | Not reported |
Published upstream
May 20, 2025
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: net_sched: ets: Fix double list add in class with netem as child qdisc As described in Gerrard's report [1], there are use cases where a netem child qdisc will make the parent qdisc's enqueue callback reentrant. In the case of ets, there won't be a UAF, but the code will add the same classifier to the list twice, which will cause memory corruption. In addition to checking for qlen being zero, this patch checks whether the class was already added to the active_list (cl_is_active) before doing the addition to cater for the reentrant case. [1] https://lore.kernel.org/netdev/CAHcdcOm+03OD2j6R0=YHKqmy=VgJ8xEOKuP6c7mSgnp-TEJJbw@mail.gmail.com/
Quoted source text, attributed separately from HOL analysis.
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 | >=dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33 <24388ba0a1b1b6d4af1b205927ac7f7b119ee4ea || >=dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33 <554acc5a2ea9703e08023eb9a003f9e5a830a502 || >=dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33 <9efb6a0fa88e0910d079fdfeb4f7ce4d4ac6c990 || >=dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33 <72c3da7e6ceb74e74ddbb5a305a35c9fdfcac6e3 || >=dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33 <1f01e9f961605eb397c6ecd1d7b0233dfbf9077c || >=dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33 <bc321f714de693aae06e3786f88df2975376d996 || >=dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33 <1a6d0c00fa07972384b0c308c72db091d49988b6 | 24388ba0a1b1b6d4af1b205927ac7f7b119ee4ea, 554acc5a2ea9703e08023eb9a003f9e5a830a502, 9efb6a0fa88e0910d079fdfeb4f7ce4d4ac6c990, 72c3da7e6ceb74e74ddbb5a305a35c9fdfcac6e3, 1f01e9f961605eb397c6ecd1d7b0233dfbf9077c, bc321f714de693aae06e3786f88df2975376d996, 1a6d0c00fa07972384b0c308c72db091d49988b6 |
| Linux/Linuxgeneric | 5.6 | Not reported |
Published upstream
May 20, 2025
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: net_sched: ets: Fix double list add in class with netem as child qdisc As described in Gerrard's report [1], there are use cases where a netem child qdisc will make the parent qdisc's enqueue callback reentrant. In the case of ets, there won't be a UAF, but the code will add the same classifier to the list twice, which will cause memory corruption. In addition to checking for qlen being zero, this patch checks whether the class was already added to the active_list (cl_is_active) before doing the addition to cater for the reentrant case. [1] https://lore.kernel.org/netdev/CAHcdcOm+03OD2j6R0=YHKqmy=VgJ8xEOKuP6c7mSgnp-TEJJbw@mail.gmail.com/
Quoted source text, attributed separately from HOL analysis.