CVE-2025-22037 in the critical feed json
ksmbd: fix null pointer dereference in alloc_preauth_hash()
published 2025-04-16 18 mo ago modified 2026-10-30 10 d ago also EUVD-2025-11252
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 68.8%
- EPSS 68.8% chance of exploitation in 30 days, percentile 99.3%
- public exploits
- 0
- none known
Summary
In the Linux kernel, the following vulnerability has been resolved:
ksmbd: fix null pointer dereference in alloc_preauth_hash()
The Client send malformed smb2 negotiate request. ksmbd return error response. Subsequently, the client can send smb2 session setup even thought conn->preauth_info is not allocated. This patch add KSMBD_SESS_NEED_SETUP status of connection to ignore session setup request if smb2 negotiate phase is not complete.
Patch / fix
- Linux Linux 6.1.191, 6.6.107, 6.12.23, 6.13.11, 6.14.2, 6.15
- linux Debian 14, Debian 13 6.12.25-1
debian advisories DEBIAN-CVE-2025-22037
- linux Ubuntu 24.04 LTS 6.8.0-101.101
- linux-aws Ubuntu 24.04 LTS 6.8.0-1047.50
- linux-gcp Ubuntu 24.04 LTS 6.8.0-1048.51
- linux-gke Ubuntu 24.04 LTS 6.8.0-1044.49
- linux-ibm Ubuntu 24.04 LTS 6.8.0-1045.45
- linux-azure Ubuntu 24.04 LTS 6.8.0-1051.57
- linux-gkeop Ubuntu 24.04 LTS 6.8.0-1031.34
- linux-raspi Ubuntu 24.04 LTS 6.8.0-1048.52
ubuntu advisories UBUNTU-CVE-2025-22037
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/2d3461d6ae74ebdcd4d65128c855198649bcadcd commit
- git.kernel.org/stable/c/cce57cd8c5dead24127cf2308fdd60fcad2d6ba6 commit
- git.kernel.org/stable/c/ca8bed31edf728a662ef9d6f39f50e7a7dc2b5ad commit
- git.kernel.org/stable/c/8f216b33a5e1b3489c073b1ea1b3d7cb63c8dc4d commit
- git.kernel.org/stable/c/b8eb243e670ecf30e91524dd12f7260dac07d335 commit
- git.kernel.org/stable/c/c8b5b7c5da7d0c31c9b7190b4a7bba5281fc4780 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-2025-22037 updated cvss 5.5
kernel: ksmbd: fix null pointer dereference in alloc_preauth_hash()
-
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
68.76% chance of exploitation in the next 30 days, higher than 99.3% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected products
- Linux Linux
Classification
- Weakness
-
- CWE-476 NULL Pointer Dereference
- Technology feeds
References
- git.kernel.org /stable/c/2d3461d6ae74ebdcd4d65128c855198649bcadcd
-
git.kernel.org
/stable/c/cce57cd8c5dead24127cf2308fdd60fcad2d6ba6
patch
-
git.kernel.org
/stable/c/ca8bed31edf728a662ef9d6f39f50e7a7dc2b5ad
patch
-
git.kernel.org
/stable/c/8f216b33a5e1b3489c073b1ea1b3d7cb63c8dc4d
patch
-
git.kernel.org
/stable/c/b8eb243e670ecf30e91524dd12f7260dac07d335
patch
-
git.kernel.org
/stable/c/c8b5b7c5da7d0c31c9b7190b4a7bba5281fc4780
patch
-
zerodayinitiative.com
/advisories/ZDI-25-310/
third-party-advisory
Sources
- CVE List CVE-2025-22037
- NVD CVE-2025-22037
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.