CVE Intelligence
High Memory corruption

CVE-2025-38656 — wifi: iwlwifi: Fix error code in iwl_op_mode_dvm_start()

In the Linux kernel, the following vulnerability has been resolved: wifi: iwlwifi: Fix error code in iwl_op_mode_dvm_start() Preserve the error code if iwl_setup_deferred_work() fails. The current code returns ERR_PTR(0) (which is NULL) on this path. I believe the missing error code potentially leads to a use after free involving debugfs.

Published Aug 22, 2025 · Updated Oct 21, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP, GitHub Security Advisories · CNA: Linux

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.
How the score was calculated
  • EPSS 0.2% (30-day exploitation probability)+2
  • Technical severity (high)+6

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation
Not confirmed
Not in CISA KEV — an absence of record, not proof it is unexploited.
EPSS FIRST
0.21%
ahead of 11% of scored CVEs · Oct 26, 2026
Affects
Linux
Linux and 1 more
CVSS base
7.8
High · 4 source(s)

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

  • Documented patch — git.kernel.org (NIST National Vulnerability Database)
  • Documented patch — git.kernel.org (NIST National Vulnerability Database)
  • Documented patch — git.kernel.org (NIST National Vulnerability Database)

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

  1. Identify exposed assets running the affected vendor/product/version combinations (Linux Linux, Linux Linux Kernel).
  2. Apply the fixed version or the patch documented under Remediation.
  3. Search available logs for exploit probes matching the vulnerability class (memory corruption), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

VendorProductVersionsStatusSource
Linux Linux ≥ 90a0d9f339960448a3acc1437a46730f975efd6a and < cf80c02a9fdb6c5bc8508beb6a0f6a1294fc32f6≥ 6.12.42 and < 6.12.114≥ 6.6.102 and < 6.6.160≥ 6.1.148 and < 6.2≥ 5.15.190 and < 5.16≥ 5.10.241 and < 5.11≥ 5.4.297 and < 5.5version 6663c52608d8d8727bf1911e6d9218069ba1c85e
and 7 more version 2e9f85ee3b46453a2f250a57d3a9f10c70c71202version b398120fbe0acfef60b16f6a0f69902d385d7728version c80832d445653baba5ac80cd2c2637c437ac881b≥ 70a1b527eaea9430b1bd87de59f3b9f6bd225701 and < 1d068272c21d886d06526454b68368100ba0a720≥ c0e43c3f6c0a79381b468574c241065998412b7c and < 991e2066f6009d3cb898413058c62dbcc92bd6d2≥ 7dd6350307af6521b6240b295c93b7eec4daebe6 and < f95598a133a905fd937354ad902773d05593b8b9≥ ca980f1911a7144d451d1c31298ab8507c6bd88f and < 5c432da1ee191e9f7830dd516456706063d7bec3
Vulnerable CVE Program (cve.org) e CISA ADP
Linux Linux Kernel ≥ 5.4.297 and < 5.5≥ 6.12.42 and < 6.13≥ 6.6.102 and < 6.7≥ 6.1.148 and < 6.2≥ 5.15.190 and < 5.16≥ 5.10.241 and < 5.11 Vulnerable NIST National Vulnerability Database

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

ScoreVersionSeverityExpl.ImpactScored by
7.8 CVSS 3.1 High 1.8 5.9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 via NIST National Vulnerability Database
7.8 CVSS 3.1 High 1.8 5.9 nvd@nist.gov via NIST National Vulnerability Database
7.8 CVSS 3.1 High — — GitHub, Inc. via GitHub Security Advisories
7.8 CVSS 3.1 High — — Linux via CVE Program (cve.org) e CISA ADP
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H (score shown at the top: nvd@nist.gov)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-416 · Use After Free

Other CVEs with this weakness →

EPSS over time FIRST

Oct 20, 2026 → Oct 26, 2026 · 7 reading(s) · max 0.21%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

  • Local/physical vector: focus on endpoint telemetry (EDR) from affected hosts.
  • Correlate service crashes/restarts with inbound traffic; repeated crashes may indicate attempts.
endpoint telemetry (EDR)crash dumps

Timeline

What happened to this CVE, newest first.

  • 2026
  • Affected products added · linux/linux
    Oct 21, 2026 · CVE Program (cve.org) e CISA ADP
  • Record published
    Oct 21, 2026
  • Fix documented
    Oct 21, 2026 · NIST National Vulnerability Database
  • Affected products added · linux/linux kernel
    Oct 21, 2026 · NIST National Vulnerability Database
  • CVSS changed · 7.8
    Oct 21, 2026 · NIST National Vulnerability Database
  • Source status changed · → Modified
    Oct 21, 2026 · NIST National Vulnerability Database
  • Record created in this database
    Oct 21, 2026 · Alertas do Telegram
  • 2025
  • CVE published
    Aug 22, 2025 · Linux

Source activity

Repeated readings are counted rather than listed.

  • 2× References added · Oct 21, 2026 – Oct 21, 2026
  • 1× Official description updated · Oct 21, 2026 – Oct 21, 2026

References

7 on the record

Elsewhere on this site

Linux
every CVE for this vendor
Memory corruption
same class
CWE-416
other pages naming this weakness

Related CVEs (same products)

  • CVE-2026-99092 riscv: patch: fix handling of bpf-jit execmem addresses 18h
  • CVE-2026-99093 mm: don't schedule deferred kernel page table freeing while booting 18h
  • CVE-2026-99095 drm/vc4: drain the hangcheck timer and works on V3D unbind 18h
  • CVE-2026-99096 io_uring/register: don't exempt disabled rings from task restrictions 18h
  • CVE-2026-99097 tee: shm: reject zero-sized allocations in tee_dyn_shm_alloc_helper() 18h
  • CVE-2026-99098 dm-integrity: fix buffer overflow in inline mode with large tag size 18h

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

  • No CISA SSVC assessment.
  • No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
  • No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
  • No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2025-38656 is "wifi: iwlwifi: Fix error code in iwl_op_mode_dvm_start()", rated High. It affects Linux (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 7.8 describes technical severity. EPSS 0.21% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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