CVE-2026-43253High· 7.5▾ TwilightIn the Linux kernel, the following vulnerability has been resolved: iommu/amd: move wait_on_sem() out of spinlock With iommu.strict=1, the existing completion wait path can cause soft lockups under stressed environment, as wait_on_sem(…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 41.3 · 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
0.5%
Last analysed / modified upstream
In the Linux kernel, the following vulnerability has been resolved:
iommu/amd: move wait_on_sem() out of spinlock
With iommu.strict=1, the existing completion wait path can cause soft lockups under stressed environment, as wait_on_sem() busy-waits under the spinlock with interrupts disabled.
Move the completion wait in iommu_completion_wait() out of the spinlock. wait_on_sem() only polls the hardware-updated cmd_sem and does not require iommu->lock, so holding the lock during the busy wait unnecessarily increases contention and extends the time with interrupts disabled.
Linux >= 4bf5beef578e46393f11eb69dda7d17a065e05ff < f2f65b28d802a667119147444ec2ae33eebf9a58Linux >= 4bf5beef578e46393f11eb69dda7d17a065e05ff < 715c263119fd1b918a9fcbd8a36ea5b604a46324Linux >= 4bf5beef578e46393f11eb69dda7d17a065e05ff < e15768e68820142077bbca402d8e902f64ade1b0Linux >= 4bf5beef578e46393f11eb69dda7d17a065e05ff < 496269d12072ecb219826485bdbec70c92a8eef5Linux >= 4bf5beef578e46393f11eb69dda7d17a065e05ff < d2a0cac10597068567d336e85fa3cbdbe8ca62bfLinux 4.9Refer 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