CVE-2025-37926 json
ksmbd: fix use-after-free in ksmbd_session_rpc_open
published 2025-05-20 17 mo ago modified 2026-08-05 3 mo ago also EUVD-2025-15919
- cvss
- 8.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 47%
- public exploits
- 0
- none known
Summary
In the Linux kernel, the following vulnerability has been resolved:
ksmbd: fix use-after-free in ksmbd_session_rpc_open
A UAF issue can occur due to a race condition between ksmbd_session_rpc_open() and __session_rpc_close(). Add rpc_lock to the session to protect it.
Patch / fix
- Linux Linux 6.1.162, 6.6.122, 6.12.28, 6.14.6, 6.15
- linux Debian 12 6.1.162-1
- linux Debian 14, Debian 13 6.12.29-1
debian advisories DEBIAN-CVE-2025-37926
- linux Ubuntu 24.04 LTS 6.8.0-117.117
- linux-aws Ubuntu 24.04 LTS 6.8.0-1055.58
- linux-gcp Ubuntu 24.04 LTS 6.8.0-1058.61
- linux-gke Ubuntu 24.04 LTS 6.8.0-1054.60
- linux-ibm Ubuntu 24.04 LTS 6.8.0-1055.56
- linux-azure Ubuntu 24.04 LTS 6.8.0-1056.62
- linux-gkeop Ubuntu 24.04 LTS 6.8.0-1041.44
- linux-raspi Ubuntu 24.04 LTS 6.8.0-1056.60
ubuntu advisories UBUNTU-CVE-2025-37926
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/a4348710a7267705b75692dc1a000920481d1d92 commit
- git.kernel.org/stable/c/1067361a1cc6ad9cdf7acfc47f90012b72ad1502 commit
- git.kernel.org/stable/c/8fb3b6c85b7e3127161623586b62abcc366caa20 commit
- git.kernel.org/stable/c/6323fec65fe54b365961fed260dd579191e46121 commit
- git.kernel.org/stable/c/a1f46c99d9ea411f9bf30025b912d881d36fc709 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-2025-37926 updated
kernel: ksmbd: fix use-after-free in ksmbd_session_rpc_open
-
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
0.57% chance of exploitation in the next 30 days, higher than 47% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected products
- Linux Linux
Classification
- Weakness
-
- CWE-416 Use After Free
- Technology feeds
References
-
git.kernel.org
/stable/c/a4348710a7267705b75692dc1a000920481d1d92
patch
-
git.kernel.org
/stable/c/1067361a1cc6ad9cdf7acfc47f90012b72ad1502
patch
-
git.kernel.org
/stable/c/8fb3b6c85b7e3127161623586b62abcc366caa20
patch
-
git.kernel.org
/stable/c/6323fec65fe54b365961fed260dd579191e46121
patch
-
git.kernel.org
/stable/c/a1f46c99d9ea411f9bf30025b912d881d36fc709
patch
Sources
- CVE List CVE-2025-37926
- NVD CVE-2025-37926
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.