Linux kernel: DMA unmap_sg() nents mismatch in ksmbd smbd
CVE-2026-23093 Published on February 4, 2026
ksmbd: smbd: fix dma_unmap_sg() nents
In the Linux kernel, the following vulnerability has been resolved:
ksmbd: smbd: fix dma_unmap_sg() nents
The dma_unmap_sg() functions should be called with the same nents as the
dma_map_sg(), not the value the map function returned.
Products Associated with CVE-2026-23093
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Affected Versions
Linux:- Version 0626e6641f6b467447c81dd7678a69c66f7746cf and below f569f5b8bfd5133defdf9c7f8a72c63aa11f54ec is affected.
- Version 0626e6641f6b467447c81dd7678a69c66f7746cf and below 6ececffd3e9fe93a87738625dc0671165d27bf96 is affected.
- Version 0626e6641f6b467447c81dd7678a69c66f7746cf and below 4d1e9a4a450aae47277763562122cc80ed703ab2 is affected.
- Version 0626e6641f6b467447c81dd7678a69c66f7746cf and below 70ba85e439221a5d6dda34a3004db6640f0525e6 is affected.
- Version 0626e6641f6b467447c81dd7678a69c66f7746cf and below d1943bc9dc9508f5933788a76f8a35d10e43a646 is affected.
- Version 0626e6641f6b467447c81dd7678a69c66f7746cf and below 98e3e2b561bc88f4dd218d1c05890672874692f6 is affected.
- Version 5.15 is affected.
- Before 5.15 is unaffected.
- Version 5.15.199, <= 5.15.* is unaffected.
- Version 6.1.162, <= 6.1.* is unaffected.
- Version 6.6.123, <= 6.6.* is unaffected.
- Version 6.12.69, <= 6.12.* is unaffected.
- Version 6.18.8, <= 6.18.* is unaffected.
- Version 6.19, <= * is unaffected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.