8.8

CVE-2025-22074: ksmbd: fix r_count dec/increment mismatch

Modified
AliasesUBUNTU-CVE-2025-22074DEBIAN-CVE-2025-22074
Published 16-04-2025Last modified 30-10-2026

Vulnerability summary

CVE-2025-22074 is a high (CVSS 8.8) vulnerability in linux. EPSS estimates a 0.53% chance of exploitation in the next 30 days, higher than 44.7% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 8.8, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
8.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.53%
0%100%
Low · +0.04 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 5 · Related 3
MGASA-2025-0142MGASA-2025-0146USN-7594-1USN-7594-2USN-7594-3

Timeline

  1. 16-04-2025
    PublishedVulnerability first disclosed.
  2. 30-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix r_count dec/increment mismatch r_count is only increased when there is an oplock break wait, so r_count inc/decrement are not paired. This can cause r_count to become negative, which can lead to a problem where the ksmbd thread does not terminate.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.53%

Chance of exploitation in the next 30 days

Percentile

45%

Versus all other CVEs

30-day change

Increase +0.04 pp

From 0.49% 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: network-reachable, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu77 products
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
  • linux-aws-5.13All versions (No fix recorded)
  • linux-aws-5.19All versions (No fix recorded)
Linux2 products
  • linux≥ 8e6508c7ecb1802909f294827eff38f301d0c937, < 8829849da3f68697b830a5b36047b0d8a50ae3ed | ≥ 09aeab68033161cb54f194da93e51a11aee6144b, < 4790bcb269e5d6d88200a67c54ae6d627332a3be | ≥ a4261bbc33fbf99b99c80aa3a2c5097611802980, < 457db486203c90e10c3efc87fd45cc7000b1cd36 | ≥ f17d1c63a76b0fe8e9c78023a86507a3a6d62cfa, < 20378cf48359f39dee0ef9b61470ebe77bd49c0d | ≥ 3aa660c059240e0c795217182cf7df32909dd917, < c2ec33d46b4d1c8085dab5d02e00b21f4f0fb8a9 | ≥ 3aa660c059240e0c795217182cf7df32909dd917, < ddb7ea36ba7129c2ed107e2186591128618864e1 | ≥ 6.6.84, < 6.6.87 | ≥ 6.12.20, < 6.12.23 | ≥ 6.13.8, < 6.13.11 | 6.14
  • linux_kernelEOL≥ 6.6.84, < 6.6.87 | ≥ 6.12.20, < 6.12.23 | ≥ 6.13.8, < 6.13.11 | 6.14 | 6.14:rc7 | 6.14.1
Debian1 product
  • linux< 6.12.25-1

3 vendors · 80 products

References

13 links
Show all 13 references