CVE-2025-37788

Service interruption via allocation-error memory leak

Published May 1, 2025 · Updated May 11, 2026

Memory leak in affected Linux kernel releases allows local users to exhaust memory through the cxgb4 filter-initialization error path. The cxgb4_init_ethtool_filters() loop retains the current port's loc_array when bmap allocation fails because cleanup begins with the preceding iteration. Exploitation requires low-privilege local access and that allocation-failure sequence; the bounded consequence is service interruption through memory exhaustion.

CVSS severity5.5
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leak in affected Linux kernel releases allows local users to exhaust memory through the cxgb4 filter-initialization error path. The cxgb4_init_ethtool_filters() loop retains the current port's loc_array when bmap allocation fails because cleanup begins with the preceding iteration. Exploitation requires low-privilege local access and that allocation-failure sequence; the bounded consequence is service interruption through memory exhaustion.

The record

CVE
CVE-2025-37788
Published
May 1, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 1, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.9
  2. Affected versionversion=d915c299f1da68a7dbb43895b8741c7b916c9d08 <00ffb3724ce743578163f5ade2884374554ca021
  3. Affected versionversion=d915c299f1da68a7dbb43895b8741c7b916c9d08 <08aa59c0be768596467552c129e9f82166779a67
  4. Affected versionversion=d915c299f1da68a7dbb43895b8741c7b916c9d08 <118d05b530343cd9322607b9719405ba254a4183
  5. Affected versionversion=d915c299f1da68a7dbb43895b8741c7b916c9d08 <76deedea08899885f076aba0bb80bd1276446822
  6. Affected versionversion=d915c299f1da68a7dbb43895b8741c7b916c9d08 <dafb6e433ab2333b67be05433dc9c6ccbc7b1284
  7. Affected versionversion=d915c299f1da68a7dbb43895b8741c7b916c9d08 <e9de08e15aee35b96064960f95997bb6c1209c4b
  8. Affected versionversion=d915c299f1da68a7dbb43895b8741c7b916c9d08 <fa2d7708955e4f8212fd69bab1da604e60cb0b15

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.9; version=d915c299f1da68a7dbb43895b8741c7b916c9d08 <00ffb3724ce743578163f5ade2884374554ca021; version=d915c299f1da68a7dbb43895b8741c7b916c9d08 <08aa59c0be768596467552c129e9f82166779a67; version=d915c299f1da68a7dbb43895b8741c7b916c9d08 <118d05b530343cd9322607b9719405ba254a4183; version=d915c299f1da68a7dbb43895b8741c7b916c9d08 <76deedea08899885f076aba0bb80bd1276446822; version=d915c299f1da68a7dbb43895b8741c7b916c9d08 <dafb6e433ab2333b67be05433dc9c6ccbc7b1284; version=d915c299f1da68a7dbb43895b8741c7b916c9d08 <e9de08e15aee35b96064960f95997bb6c1209c4b; version=d915c299f1da68a7dbb43895b8741c7b916c9d08 <fa2d7708955e4f8212fd69bab1da604e60cb0b15

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-401Missing Release of Memory after Effective Lifetime
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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