5.5

CVE-2025-71223: smb/server: fix refcount leak in smb2_open()

Analyzed
AliasesUBUNTU-CVE-2025-71223DEBIAN-CVE-2025-71223
Published 14-02-2026Last modified 23-05-2026

Vulnerability summary

CVE-2025-71223 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.14% chance of exploitation in the next 30 days, higher than 3.6% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.14%
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 3
DSA-6141-1MGASA-2026-0097MGASA-2026-0098

Timeline

  1. 14-02-2026
    PublishedVulnerability first disclosed.
  2. 23-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: smb/server: fix refcount leak in smb2_open() When ksmbd_vfs_getattr() fails, the reference count of ksmbd_file must be released.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.14%

Chance of exploitation in the next 30 days

Percentile

4%

Versus all other CVEs

30-day change

Increase +0.01 pp

From 0.13% 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

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu159 products
  • linuxAll versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 8df4bcdb0a4232192b2445256c39b787d58ef14d, < 2456fde2b137703328f1695f60c68fe488d17e36 | ≥ c8efcc786146a951091588e5fa7e3c754850cb3c, < 39ca11ff158c98fb092176f06047628c54bcf7a1 | ≥ c8efcc786146a951091588e5fa7e3c754850cb3c, < 4665e52bde3b1f8f442895ce7d88fa62a43e48c4 | ≥ c8efcc786146a951091588e5fa7e3c754850cb3c, < f416c556997aa56ec4384c6b6efd6a0e6ac70aa7 | ≥ 6.6.32, < 6.6.124 | 6.9
  • linux_kernel≥ 6.6.32, < 6.6.124 | ≥ 6.9, < 6.12.70 | ≥ 6.13, < 6.18.10 | 6.19:rc1 | 6.19:rc2 | 6.19:rc3
Debian1 product
  • linux< 6.12.73-1 | < 6.18.10-1

3 vendors · 162 products

References

8 links