Answer in brief
CVE-2026-43238 records a Unknown severity vulnerability in net/sched: act_skbedit: fix divide-by-zero in tcf_skbedit_hash(). 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 | >=38a6f0865796e26fc38fff4858f681d9ae76fa0f <59809fda4da7730cfe84a948033f47eb45db073d || >=38a6f0865796e26fc38fff4858f681d9ae76fa0f <9c735a7d98c982a786b0db71eb6566ee00aaa04f || >=38a6f0865796e26fc38fff4858f681d9ae76fa0f <015cebdfcb97b5347fb7f598ea712a281cb35840 || >=38a6f0865796e26fc38fff4858f681d9ae76fa0f <4ece5eb4836f8ff03b9004dc2430a7169f282851 || >=38a6f0865796e26fc38fff4858f681d9ae76fa0f <3c2b95b26860bd6f8e2310d31ea1200d3f8f173e || >=38a6f0865796e26fc38fff4858f681d9ae76fa0f <be054cc66f739a9ba615dba9012a07fab8e7dd6f | 59809fda4da7730cfe84a948033f47eb45db073d, 9c735a7d98c982a786b0db71eb6566ee00aaa04f, 015cebdfcb97b5347fb7f598ea712a281cb35840, 4ece5eb4836f8ff03b9004dc2430a7169f282851, 3c2b95b26860bd6f8e2310d31ea1200d3f8f173e, be054cc66f739a9ba615dba9012a07fab8e7dd6f |
| Linux/Linuxgeneric | 5.19 | Not reported |
Published upstream
May 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Nov 6, 2026
In the Linux kernel, the following vulnerability has been resolved: net/sched: act_skbedit: fix divide-by-zero in tcf_skbedit_hash() Commit 38a6f0865796 ("net: sched: support hash selecting tx queue") added SKBEDIT_F_TXQ_SKBHASH support. The inclusive range size is computed as: mapping_mod = queue_mapping_max - queue_mapping + 1; The range size can be 65536 when the requested range covers all possible u16 queue IDs (e.g. queue_mapping=0 and queue_mapping_max=U16_MAX). That value cannot be represented in a u16 and previously wrapped to 0, so tcf_skbedit_hash() could trigger a divide-by-zero: queue_mapping += skb_get_hash(skb) % params->mapping_mod; Compute mapping_mod in a wider type and reject ranges larger than U16_MAX to prevent params->mapping_mod from becoming 0 and avoid the crash.
Quoted source text, attributed separately from HOL analysis.