9.8

CVE-2025-38737: cifs: Fix oops due to uninitialised variable

Modified
AliasesRHSA-2025:23009UBUNTU-CVE-2025-38737DEBIAN-CVE-2025-38737
Published 05-09-2025Last modified 05-08-2026

Vulnerability summary

CVE-2025-38737 is a critical (CVSS 9.8) Use of Uninitialized Resource vulnerability in linux. EPSS estimates a 0.38% chance of exploitation in the next 30 days, higher than 31.6% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 9.8 (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
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.38%
0%100%
Low · 0.00 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 2
DSA-6008-1RHSA-2025:22854

Timeline

  1. 05-09-2025
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: cifs: Fix oops due to uninitialised variable Fix smb3_init_transform_rq() to initialise buffer to NULL before calling netfs_alloc_folioq_buffer() as netfs assumes it can append to the buffer it is given. Setting it to NULL means it should start a fresh buffer, but the value is currently undefined.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.38%

Chance of exploitation in the next 30 days

Percentile

32%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.38% 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.

Ubuntu93 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)
Redhat91 products
  • kernel< 0:6.12.0-55.48.1.el10_0
  • kernel-64k< 0:6.12.0-55.48.1.el10_0
  • kernel-64k-core< 0:6.12.0-55.48.1.el10_0
  • kernel-64k-debug< 0:6.12.0-55.48.1.el10_0
  • kernel-64k-debug-core< 0:6.12.0-55.48.1.el10_0
Linux2 products
  • linux≥ a2906d3316fc19bf0ade84618bb73eab604c447e, < 4931fe2dbe1cc0e7d350a4b51b0b330e43971d98 | ≥ a2906d3316fc19bf0ade84618bb73eab604c447e, < 6adaa9fae36f848afa7278945d725e197e33c496 | ≥ a2906d3316fc19bf0ade84618bb73eab604c447e, < 453a6d2a68e54a483d67233c6e1e24c4095ee4be | 6.12
  • linux_kernel≥ 6.12, < 6.12.44 | ≥ 6.13, < 6.16.4 | 6.17:rc1 | 6.17:rc2
Debian1 product
  • linux< 6.12.48-1 | < 6.16.5-1

4 vendors · 187 products

References

14 links
Show all 14 references