Answer in brief
CVE-2026-68141 records a High severity (CVSS 7.5) vulnerability in net/af_iucv: fix NULL deref in afiucv_hs_callback_syn(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), 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.
CVSS is 7.5. 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), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=3881ac441f642d56503818123446f7298442236b <8bb111f87ded6acb9837ec9b45d6f02cda94c51f || >=3881ac441f642d56503818123446f7298442236b <46453b16f38ec7147351f7447e2aec6ea330f7b3 || >=3881ac441f642d56503818123446f7298442236b <33736ff5e7c97d3348ce812e8bd2e125d840743c || >=3881ac441f642d56503818123446f7298442236b <0e857185591fe79934427c9c0c1c31dc776be134 || >=3881ac441f642d56503818123446f7298442236b <47a5116e56a6b6fe1e909f244e39cd0fc26ceee4 | 8bb111f87ded6acb9837ec9b45d6f02cda94c51f, 46453b16f38ec7147351f7447e2aec6ea330f7b3, 33736ff5e7c97d3348ce812e8bd2e125d840743c, 0e857185591fe79934427c9c0c1c31dc776be134, 47a5116e56a6b6fe1e909f244e39cd0fc26ceee4 |
| Linux/Linuxgeneric | 3.2 | Not reported |
| Linux/Linuxgeneric | >=3881ac441f642d56503818123446f7298442236b <6a1eb5b46c19073f8153b7e2c19b408cf353aaf1 || >=3881ac441f642d56503818123446f7298442236b <c0b6e2ae90613c2fea7eaf3faa20985c6c2a1953 || >=3881ac441f642d56503818123446f7298442236b <07e21deb3664001995e0a456dd627ab7dbe127ec || >=3881ac441f642d56503818123446f7298442236b <8bb111f87ded6acb9837ec9b45d6f02cda94c51f || >=3881ac441f642d56503818123446f7298442236b <46453b16f38ec7147351f7447e2aec6ea330f7b3 || >=3881ac441f642d56503818123446f7298442236b <33736ff5e7c97d3348ce812e8bd2e125d840743c || >=3881ac441f642d56503818123446f7298442236b <0e857185591fe79934427c9c0c1c31dc776be134 || >=3881ac441f642d56503818123446f7298442236b <47a5116e56a6b6fe1e909f244e39cd0fc26ceee4 | 6a1eb5b46c19073f8153b7e2c19b408cf353aaf1, c0b6e2ae90613c2fea7eaf3faa20985c6c2a1953, 07e21deb3664001995e0a456dd627ab7dbe127ec, 8bb111f87ded6acb9837ec9b45d6f02cda94c51f, 46453b16f38ec7147351f7447e2aec6ea330f7b3, 33736ff5e7c97d3348ce812e8bd2e125d840743c, 0e857185591fe79934427c9c0c1c31dc776be134, 47a5116e56a6b6fe1e909f244e39cd0fc26ceee4 |
Published upstream
Aug 10, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 10, 2026
In the Linux kernel, the following vulnerability has been resolved: net/af_iucv: fix NULL deref in afiucv_hs_callback_syn() afiucv_hs_callback_syn() allocates the child socket with GFP_ATOMIC. If the allocation fails, nsk is NULL. The connection-refused path is entered when the listen state check fails, the accept backlog is full, or nsk is NULL. The code unconditionally calls iucv_sock_kill(nsk) in that path. iucv_sock_kill() does not accept a NULL socket pointer and immediately dereferences sk via sock_flag(sk, SOCK_ZAPPED). When nsk is NULL, calling iucv_sock_kill(nsk) results in a NULL pointer dereference. Only call iucv_sock_kill() when a child socket was successfully allocated.
Quoted source text, attributed separately from HOL analysis.