Answer in brief
CVE-2026-68397 records a Unknown severity vulnerability in net/iucv: take a reference on the socket found in afiucv_hs_rcv(). 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 | >=3881ac441f642d56503818123446f7298442236b <4dc0e63abf8bc7ba8892e617c1fb8b204361e022 || >=3881ac441f642d56503818123446f7298442236b <1801cb20a5025a787d6853e19c38db138344b4b4 || >=3881ac441f642d56503818123446f7298442236b <c75a950e77356e526672cba4584080c6c8b793b6 || >=3881ac441f642d56503818123446f7298442236b <5595ea59cdf29182cf6a270cacc1426c57b603de || >=3881ac441f642d56503818123446f7298442236b <4fa349156043dc119721d067329714179f501749 | 4dc0e63abf8bc7ba8892e617c1fb8b204361e022, 1801cb20a5025a787d6853e19c38db138344b4b4, c75a950e77356e526672cba4584080c6c8b793b6, 5595ea59cdf29182cf6a270cacc1426c57b603de, 4fa349156043dc119721d067329714179f501749 |
| Linux/Linuxgeneric | 3.2 | Not reported |
Published upstream
Aug 10, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 10, 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/iucv: take a reference on the socket found in afiucv_hs_rcv() afiucv_hs_rcv() looks up the destination socket under iucv_sk_list.lock, drops the lock, and then passes the socket to the afiucv_hs_callback_*() handlers without holding a reference. AF_IUCV sockets are not RCU-protected and are freed synchronously by iucv_sock_kill() -> sock_put(), so a concurrent close can free the socket in the window between read_unlock() and the handler, which then dereferences freed memory (for example sk->sk_data_ready() in afiucv_hs_callback_syn()). Take a reference with sock_hold() while the socket is still on the list and release it with sock_put() once the handler has run.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-68397 records a Unknown severity vulnerability in net/iucv: take a reference on the socket found in afiucv_hs_rcv(). 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 | >=3881ac441f642d56503818123446f7298442236b <4dc0e63abf8bc7ba8892e617c1fb8b204361e022 || >=3881ac441f642d56503818123446f7298442236b <1801cb20a5025a787d6853e19c38db138344b4b4 || >=3881ac441f642d56503818123446f7298442236b <c75a950e77356e526672cba4584080c6c8b793b6 || >=3881ac441f642d56503818123446f7298442236b <5595ea59cdf29182cf6a270cacc1426c57b603de || >=3881ac441f642d56503818123446f7298442236b <4fa349156043dc119721d067329714179f501749 | 4dc0e63abf8bc7ba8892e617c1fb8b204361e022, 1801cb20a5025a787d6853e19c38db138344b4b4, c75a950e77356e526672cba4584080c6c8b793b6, 5595ea59cdf29182cf6a270cacc1426c57b603de, 4fa349156043dc119721d067329714179f501749 |
| Linux/Linuxgeneric | 3.2 | Not reported |
Published upstream
Aug 10, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 10, 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/iucv: take a reference on the socket found in afiucv_hs_rcv() afiucv_hs_rcv() looks up the destination socket under iucv_sk_list.lock, drops the lock, and then passes the socket to the afiucv_hs_callback_*() handlers without holding a reference. AF_IUCV sockets are not RCU-protected and are freed synchronously by iucv_sock_kill() -> sock_put(), so a concurrent close can free the socket in the window between read_unlock() and the handler, which then dereferences freed memory (for example sk->sk_data_ready() in afiucv_hs_callback_syn()). Take a reference with sock_hold() while the socket is still on the list and release it with sock_put() once the handler has run.
Quoted source text, attributed separately from HOL analysis.