7.5

CVE-2025-38393: NFSv4/pNFS: Fix a race to wake on NFS_LAYOUT_DRAIN

Modified
AliasesUBUNTU-CVE-2025-38393DEBIAN-CVE-2025-38393
Published 25-07-2025Last modified 15-10-2026

Vulnerability summary

CVE-2025-38393 is a high (CVSS 7.5) vulnerability in debian debian_linux. EPSS estimates a 0.40% chance of exploitation in the next 30 days, higher than 34.7% 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
0.40%
0%100%
Low · +0.05 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 55 · Related 47
DLA-4327-1DLA-4328-1DSA-5973-1MGASA-2025-0218MGASA-2025-0219OPENSUSE-SU-2025:20081-1

Timeline

  1. 25-07-2025
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: NFSv4/pNFS: Fix a race to wake on NFS_LAYOUT_DRAIN We found a few different systems hung up in writeback waiting on the same page lock, and one task waiting on the NFS_LAYOUT_DRAIN bit in pnfs_update_layout(), however the pnfs_layout_hdr's plh_outstanding count was zero. It seems most likely that this is another race between the waiter and waker similar to commit ed0172af5d6f ("SUNRPC: Fix a race to wake a sync task"). Fix it up by applying the advised barrier.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.40%

Chance of exploitation in the next 30 days

Percentile

35%

Versus all other CVEs

30-day change

Increase +0.05 pp

From 0.35% 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.

Ubuntu134 products
  • linux< 5.15.0-156.166 | < 6.8.0-100.100
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.15.0-1092.99 | < 6.8.0-1046.49
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
Linux2 products
  • linux≥ 8acc3e228e1c90bd410f73597a4549e0409f22d6, < 08287df60bac5b008b6bcdb03053988335d3d282 | ≥ ec23a86e060cbe30b62eb2955adc97c92d80cc4c, < 8846fd02c98da8b79e6343a20e6071be6f372180 | ≥ 880265c77ac415090090d1fe72a188fee71cb458, < e4b13885e7ef1e64e45268feef1e5f0707c47e72 | ≥ 880265c77ac415090090d1fe72a188fee71cb458, < 8ca65fa71024a1767a59ffbc6a6e2278af84735e | ≥ 880265c77ac415090090d1fe72a188fee71cb458, < 864a54c1243ed3ca60baa4bc492dede1361f4c83 | ≥ 880265c77ac415090090d1fe72a188fee71cb458, < 1f4da20080718f258e189a2c5f515385fa393da6 | ≥ 880265c77ac415090090d1fe72a188fee71cb458, < c01776287414ca43412d1319d2877cbad65444ac | f133819e24e78f3aaaa00e9fa2b816d5f73fd172 | ≥ 5.10.124, < 5.10.240 | ≥ 5.15.49, < 5.15.187 | ≥ 5.18.6, < 5.19 | 5.19
  • linux_kernelEOL≥ 5.10.124, < 5.10.240 | ≥ 5.15.49, < 5.15.187 | ≥ 5.18.6, < 5.19 | ≥ 5.19.1, < 6.1.144 | ≥ 6.2, < 6.6.97 | ≥ 6.7, < 6.12.37 | ≥ 6.13, < 6.15.6 | 5.19 | 5.19:rc3 | 5.19:rc4 | 5.19:rc5 | 5.19:rc6 | 5.19:rc7 | 5.19:rc8 | 6.16:rc1 | 6.16:rc2 | 6.16:rc3 | 6.16:rc4

3 vendors · 138 products

References

46 links
Show all 46 references