Answer in brief
CVE-2026-68397 records a High severity (CVSS 8.8) 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), 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 8.8. 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), 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 |
| Linux/Linuxgeneric | >=3881ac441f642d56503818123446f7298442236b <5739be5c19495d709d902a2912c9102ce78740d5 || >=3881ac441f642d56503818123446f7298442236b <bc6c6e546ffff8865daaeb622ef348c2d481e80f || >=3881ac441f642d56503818123446f7298442236b <e3e0679fc950191aff8f27fa78abcfc2462cff4a || >=3881ac441f642d56503818123446f7298442236b <4dc0e63abf8bc7ba8892e617c1fb8b204361e022 || >=3881ac441f642d56503818123446f7298442236b <1801cb20a5025a787d6853e19c38db138344b4b4 || >=3881ac441f642d56503818123446f7298442236b <c75a950e77356e526672cba4584080c6c8b793b6 || >=3881ac441f642d56503818123446f7298442236b <5595ea59cdf29182cf6a270cacc1426c57b603de || >=3881ac441f642d56503818123446f7298442236b <4fa349156043dc119721d067329714179f501749 | 5739be5c19495d709d902a2912c9102ce78740d5, bc6c6e546ffff8865daaeb622ef348c2d481e80f, e3e0679fc950191aff8f27fa78abcfc2462cff4a, 4dc0e63abf8bc7ba8892e617c1fb8b204361e022, 1801cb20a5025a787d6853e19c38db138344b4b4, c75a950e77356e526672cba4584080c6c8b793b6, 5595ea59cdf29182cf6a270cacc1426c57b603de, 4fa349156043dc119721d067329714179f501749 |
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/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.