7.5

CVE-2025-39929: smb: client: fix smbdirect_recv_io leak in smbd_negotiate() error path

Modified
AliasesUBUNTU-CVE-2025-39929DEBIAN-CVE-2025-39929
Published 04-10-2025Last modified 15-10-2026

Vulnerability summary

CVE-2025-39929 is a high (CVSS 7.5) vulnerability in linux. EPSS estimates a 0.31% chance of exploitation in the next 30 days, higher than 24.3% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 7.5 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 0% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.31%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 21 · Related 17
DLA-4379-1DSA-6053-1MGASA-2025-0309MGASA-2025-0310SUSE-SU-2025:4189-1USN-8095-1

Timeline

  1. 04-10-2025
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix smbdirect_recv_io leak in smbd_negotiate() error path During tests of another unrelated patch I was able to trigger this error: Objects remaining on __kmem_cache_shutdown()

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.31%

Chance of exploitation in the next 30 days

Percentile

24%

Versus all other CVEs

30-day change

Increase +0.01 pp

From 0.31% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu145 products
  • linuxAll versions (No fix recorded) | < 5.15.0-198.208 | < 6.8.0-106.106
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1117.124 | < 6.8.0-1050.53
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ f198186aa9bbd60fae7a2061f4feec614d880299, < 5aa69aabcb275a8012265233c7694076ce1d9102 | ≥ f198186aa9bbd60fae7a2061f4feec614d880299, < aa4cf7615328eae44f3b4bf5f4fde3fb390c27c6 | ≥ f198186aa9bbd60fae7a2061f4feec614d880299, < 3d7c075c878ac844e33c43e506c2fa27ac7e9689 | ≥ f198186aa9bbd60fae7a2061f4feec614d880299, < e7b7a93879558e77d950f1ff9a6f3daa385b33df | ≥ f198186aa9bbd60fae7a2061f4feec614d880299, < 922338efaad63cfe30d459dfc59f9d69ff93ded4 | ≥ f198186aa9bbd60fae7a2061f4feec614d880299, < 0991418bf98f191d0c320bd25245fcffa1998c7e | ≥ f198186aa9bbd60fae7a2061f4feec614d880299, < daac51c7032036a0ca5f1aa419ad1b0471d1c6e0 | 4.16
  • linux_kernel≥ 4.16, < 6.1.154 | ≥ 6.2, < 6.6.108 | ≥ 6.7, < 6.12.49 | ≥ 6.13, < 6.16.9 | 6.17:rc1 | 6.17:rc2 | 6.17:rc3 | 6.17:rc4 | 6.17:rc5 | 6.17:rc6
Debian1 product
  • linux< 6.1.158-1 | < 6.12.57-1 | < 6.16.9-1

3 vendors · 148 products

References

29 links
Show all 29 references