CVE-2026-68397High· 8.8▾ TwilightIn 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 pas…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 48.4 · likelihood 0.1 · exploitation 0
Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.
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
0.3%
Last analysed / modified upstream
0.3% → 0.3%
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.
Linux >= 3881ac441f642d56503818123446f7298442236b < 5739be5c19495d709d902a2912c9102ce78740d5Linux >= 3881ac441f642d56503818123446f7298442236b < bc6c6e546ffff8865daaeb622ef348c2d481e80fLinux >= 3881ac441f642d56503818123446f7298442236b < e3e0679fc950191aff8f27fa78abcfc2462cff4aLinux >= 3881ac441f642d56503818123446f7298442236b < 4dc0e63abf8bc7ba8892e617c1fb8b204361e022Linux >= 3881ac441f642d56503818123446f7298442236b < 1801cb20a5025a787d6853e19c38db138344b4b4Linux >= 3881ac441f642d56503818123446f7298442236b < c75a950e77356e526672cba4584080c6c8b793b6Linux >= 3881ac441f642d56503818123446f7298442236b < 5595ea59cdf29182cf6a270cacc1426c57b603deLinux >= 3881ac441f642d56503818123446f7298442236b < 4fa349156043dc119721d067329714179f501749Linux 3.2Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-99118Nonedrm/i915/dmc: Harden DMC firmware payload parsing
CVE-2026-99117Nonenet: bridge: mcast: don't truncate the port group walk on teardown
CVE-2026-99121Noneipv4: avoid divide by zero in fib_rebalance
CVE-2026-99120NoneKVM: x86/mmu: Cope with the SS bit being set in #NPF exit codes
CVE-2026-99119Nonedrm/amdgpu/userq: actually validate userq BOs
CVE-2026-99123Nonevsock/virtio: validate packet source for connected sockets