CVE-2026-23174
In the Linux kernel, the following vulnerability has been resolved: nvme-pci: handle changing device dma map requirements The initial state of dma_needs_unmap may be false, but change to true while mapping the data iterator. Enabling swiotlb is one such case that can change the result. The nvme driver needs to save the mapped dma vectors to be unmapped later, so allocate as needed during iteration rather than assume it was always allocated at the beginning. This fixes a NULL dereference from accessing an uninitialized dma_vecs when the device dma unmapping requirements change mid-iteration.
Affected versions
Linux kernel versions
6.17
and later are affected. Fixed in
6.18.10,
6.19
and their respective stable series.
References
The following references provide additional information about CVE-2026-23174 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.
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PatchKernel patch commithttps://git.kernel.org/stable/c/071be3b0b6575d45be9df9c5b612f5882bfc5e88
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PatchKernel patch commithttps://git.kernel.org/stable/c/f3ed399e9aa6f36e92d2d0fe88b387915e9705fe
Frequently asked questions
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What is CVE-2026-23174?
CVE-2026-23174 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.17 onward and has been patched in 6.18.10 and 6.19. CVE-2026-23174 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-23174?
Yes — CVE-2026-23174 has been patched. Fixed versions include 6.18.10 and 6.19. If you are running Linux kernel 6.17 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-23174 actively exploited?
No — CVE-2026-23174 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.