CVE-2025-38501

ksmbd: limit repeated connections from clients with the same IP

HIGH
7.5
CVSS Score
Published: August 16, 2025 at 05:30 AM UTC
Updated: August 5, 2026 at 12:44 PM UTC
2 products affected across 2 vendorsLinux KernelDebian Linux

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Severity
HIGH7.5
Exploit prediction
EPSS 2%
SSVC
PoC

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: limit repeated connections from clients with the same IP Repeated connections from clients with the same IP address may exhaust the max connections and prevent other normal client connections. This patch limit repeated connections from clients with the same IP.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

5.15 ≤ v < 6.1.1485.15 ≤ v < 6.12.425.15 ≤ v < 6.15.105.15 ≤ v < 6.16.15.15 ≤ v < 6.175.15 ≤ v < 6.6.1026.13 ≤ v < 6.15.106.16 ≤ v < 6.16.16.2 ≤ v < 6.6.1026.7 ≤ v < 6.12.425.15626e6641f6b467447c81dd7678a69c66f7746cf
Vendor states this is fixed in 6073afe64510c302b7a0683a01e32c012eff715d (fixed)
Vendor states this is fixed in 7e5d91d3e6c62a9755b36f29c35288f06c3cd86b (fixed)
Vendor states this is fixed in cb092fc3a62972a4aa47c9fe356c2c6a01cd840b (fixed)
Vendor states this is fixed in e6bb9193974059ddbb0ce7763fa3882bd60d4dc3 (fixed)
Vendor states this is fixed in f1ce9258bcbce2491f9f71f7882b6eed0b33ec65 (fixed)
Vendor states this is fixed in fa1c47af4ff641cf9197ecdb1f8240cbb30389c1 (fixed)
Vendor states this is fixed in 5.15 (unaffected)
Vendor states this is fixed in 6.1.148 (unaffected)
Vendor states this is fixed in 6.12.42 (unaffected)
Vendor states this is fixed in 6.15.10 (unaffected)
Vendor states this is fixed in 6.16.1 (unaffected)
Vendor states this is fixed in 6.17 (unaffected)
Vendor states this is fixed in 6.6.102 (unaffected)

References (9)

Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/6073afe64510c302b7a0683a01e32c012eff715d
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/7e5d91d3e6c62a9755b36f29c35288f06c3cd86b
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/cb092fc3a62972a4aa47c9fe356c2c6a01cd840b
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/e6bb9193974059ddbb0ce7763fa3882bd60d4dc3
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/f1ce9258bcbce2491f9f71f7882b6eed0b33ec65
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/fa1c47af4ff641cf9197ecdb1f8240cbb30389c1
Third Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
https://github.com/keymaker-arch/KSMBDrain
Mailing List
Source: af854a3a-2127-422b-91ae-364da2661108
http://www.openwall.com/lists/oss-security/2025/09/15/2

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHLinux
Vector?

Quick Info

StatusANALYZED
CWE
CWE-400

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