7.5

CVE-2025-22037: linux NULL Pointer Dereference

CVSS: 7.5v3.1HighAnalyzed
AliasesUBUNTU-CVE-2025-22037DEBIAN-CVE-2025-22037
Published 16-04-2025Last modified 05-08-2026
Open JSON

Vulnerability summary

CVE-2025-22037 is a high (CVSS 7.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 69.51% chance of exploitation in the next 30 days, higher than 99.3% of scored vulnerabilities.

Overall risk
44/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
69.51%
0%100%
Critical · +1.92 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 18 · Related 18
USN-7594-1USN-7594-2USN-7594-3USN-7605-1USN-7605-2USN-7606-1

Timeline

  1. 16-04-2025
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

69.51%

Chance of exploitation in the next 30 days

Percentile

99%

Versus all other CVEs

30-day change

+1.92 pp

From 67.59% on 19-09-2026

19-09-202619-10-2026
EPSS score
69.51%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu127 products
  • linuxAll versions (No fix recorded) | < 6.8.0-101.101
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 6.8.0-1047.50
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < cce57cd8c5dead24127cf2308fdd60fcad2d6ba6 | ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < ca8bed31edf728a662ef9d6f39f50e7a7dc2b5ad | ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < 8f216b33a5e1b3489c073b1ea1b3d7cb63c8dc4d | ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < b8eb243e670ecf30e91524dd12f7260dac07d335 | ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < c8b5b7c5da7d0c31c9b7190b4a7bba5281fc4780 | 5.15
  • linux_kernel≥ 6.6, < 6.6.107 | ≥ 6.12, < 6.12.23 | ≥ 6.13, < 6.13.11 | ≥ 6.14, < 6.14.2
Debian1 product
  • linuxAll versions (No fix recorded) | < 6.12.25-1

3 vendors · 130 products

References

28 links
Show all 28 references