7.8

CVE-2025-38321: smb: Log an error when close_all_cached_dirs fails

Modified
AliasesUBUNTU-CVE-2025-38321DEBIAN-CVE-2025-38321
Published 10-07-2025Last modified 15-10-2026

Vulnerability summary

CVE-2025-38321 is a high (CVSS 7.8) vulnerability in linux. EPSS estimates a 0.20% chance of exploitation in the next 30 days, higher than 9.9% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.20%
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 37 · Related 35
MGASA-2025-0218MGASA-2025-0219OPENSUSE-SU-2025:20172-1SUSE-SU-2026:0278-1SUSE-SU-2026:0281-1SUSE-SU-2026:0293-1

Timeline

  1. 10-07-2025
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: smb: Log an error when close_all_cached_dirs fails Under low-memory conditions, close_all_cached_dirs() can't move the dentries to a separate list to dput() them once the locks are dropped. This will result in a "Dentry still in use" error, so add an error message that makes it clear this is what happened: [ 495.281119] CIFS: VFS: \\otters.example.com\share Out of memory while dropping dentries [ 495.281595] ------------[ cut here ]------------ [ 495.281887] BUG: Dentry ffff888115531138{i=78,n=/} still in use (2) [unmount of cifs cifs] [ 495.282391] WARNING: CPU: 1 PID: 2329 at fs/dcache.c:1536 umount_check+0xc8/0xf0 Also, bail out of looping through all tcons as soon as a single allocation fails, since we're already in trouble, and kmalloc() attempts for subseqeuent tcons are likely to fail just like the first one did.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.20%

Chance of exploitation in the next 30 days

Percentile

10%

Versus all other CVEs

30-day change

Increase +0.01 pp

From 0.19% 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.

Ubuntu120 products
  • linux< 6.8.0-100.100
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 6.8.0-1046.49
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 73934e535cffbda1490fa97d82690a0f9aa73e94, < b8ced2b9a23a1a2c1e0ed8d0d02512e51bdf38da | ≥ 548812afd96982a76a93ba76c0582ea670c40d9e, < 43f26094d6702e494e800532c3f1606e7a68eb30 | ≥ 3fa640d035e5ae526769615c35cb9ed4be6e3662, < 4479db143390bdcadc1561292aab579cdfa9f6c6 | ≥ 3fa640d035e5ae526769615c35cb9ed4be6e3662, < a2182743a8b4969481f64aec4908ff162e8a206c | ff4528bbc82d0d90073751f7b49e7b9e9c7e5638 | ≥ 6.6.64, < 6.6.95 | ≥ 6.12.2, < 6.12.35 | ≥ 6.11.11, < 6.12 | 6.13
  • linux_kernel< 6.6.95 | ≥ 6.7, < 6.12.35 | ≥ 6.13, < 6.15.4 | 6.16:rc1 | 6.16:rc2
Debian1 product
  • linux< 6.12.35-1

3 vendors · 123 products

References

31 links
Show all 31 references