CVE-2026-68141High· 7.5▾ TwilightIn 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…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 41.3 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Exploit-prediction probability, daily snapshots since Oct 16.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
0.5%
Last analysed / modified upstream
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.
Linux >= 3881ac441f642d56503818123446f7298442236b < 6a1eb5b46c19073f8153b7e2c19b408cf353aaf1Linux >= 3881ac441f642d56503818123446f7298442236b < c0b6e2ae90613c2fea7eaf3faa20985c6c2a1953Linux >= 3881ac441f642d56503818123446f7298442236b < 07e21deb3664001995e0a456dd627ab7dbe127ecLinux >= 3881ac441f642d56503818123446f7298442236b < 8bb111f87ded6acb9837ec9b45d6f02cda94c51fLinux >= 3881ac441f642d56503818123446f7298442236b < 46453b16f38ec7147351f7447e2aec6ea330f7b3Linux >= 3881ac441f642d56503818123446f7298442236b < 33736ff5e7c97d3348ce812e8bd2e125d840743cLinux >= 3881ac441f642d56503818123446f7298442236b < 0e857185591fe79934427c9c0c1c31dc776be134Linux >= 3881ac441f642d56503818123446f7298442236b < 47a5116e56a6b6fe1e909f244e39cd0fc26ceee4Linux 3.2Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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