CVE-2026-23093 json
ksmbd: smbd: fix dma_unmap_sg() nents
published 2026-02-04 9 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-5449
- cvss
- 5.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.1%
- EPSS 0.1% chance of exploitation in 30 days, percentile 3%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- Linux Linux 5.15.199, 6.1.162, 6.6.123, 6.12.69, 6.18.8, 6.19
- linux Debian 12 6.1.162-1
- linux Debian 13 6.12.69-1
- linux Debian 14 6.18.8-1
debian advisories DEBIAN-CVE-2026-23093
- linux Ubuntu 22.04 LTS 5.15.0-176.186
- linux Ubuntu 24.04 LTS 6.8.0-117.117
- linux-aws Ubuntu 22.04 LTS 5.15.0-1105.112
- linux-aws Ubuntu 24.04 LTS 6.8.0-1055.58
- linux-gcp Ubuntu 22.04 LTS 5.15.0-1105.114
- linux-gcp Ubuntu 24.04 LTS 6.8.0-1058.61
- linux-gke Ubuntu 22.04 LTS 5.15.0-1101.107
- linux-gke Ubuntu 24.04 LTS 6.8.0-1054.60
ubuntu advisories UBUNTU-CVE-2026-23093
Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0
- git.kernel.org/stable/c/f569f5b8bfd5133defdf9c7f8a72c63aa11f54ec commit
- git.kernel.org/stable/c/6ececffd3e9fe93a87738625dc0671165d27bf96 commit
- git.kernel.org/stable/c/4d1e9a4a450aae47277763562122cc80ed703ab2 commit
- git.kernel.org/stable/c/70ba85e439221a5d6dda34a3004db6640f0525e6 commit
- git.kernel.org/stable/c/d1943bc9dc9508f5933788a76f8a35d10e43a646 commit
- git.kernel.org/stable/c/98e3e2b561bc88f4dd218d1c05890672874692f6 commit
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2026-23093 updated
kernel: ksmbd: smbd: fix dma_unmap_sg() nents
-
Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more Red Hat Enterprise Linux 9 rv, perf, rtla, kernel, bpftool, libperf, +83 more Red Hat Enterprise Linux 10 kernelnot affected: vulnerable code not present
Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf
Exploit prediction
0.15% chance of exploitation in the next 30 days, higher than 3% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Affected products
- Linux Linux
Classification
- Technology feeds
References
-
git.kernel.org
/stable/c/f569f5b8bfd5133defdf9c7f8a72c63aa11f54ec
patch
-
git.kernel.org
/stable/c/6ececffd3e9fe93a87738625dc0671165d27bf96
patch
-
git.kernel.org
/stable/c/4d1e9a4a450aae47277763562122cc80ed703ab2
patch
-
git.kernel.org
/stable/c/70ba85e439221a5d6dda34a3004db6640f0525e6
patch
-
git.kernel.org
/stable/c/d1943bc9dc9508f5933788a76f8a35d10e43a646
patch
-
git.kernel.org
/stable/c/98e3e2b561bc88f4dd218d1c05890672874692f6
patch
Sources
- CVE List CVE-2026-23093
- NVD CVE-2026-23093
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.