CVE-2026-74432

Local resource exhaustion via released-call reference leak

Published Aug 15, 2026 · Updated Aug 15, 2026

Resource leak in Linux kernel RxRPC allows local users to exhaust kernel resources by peeking released calls with recvmsg(). In rxrpc_recvmsg(), the already-released-call path fails to drop its held call reference when MSG_PEEK is set. A local process must use an AF_RXRPC socket and MSG_PEEK; the public record identifies retained references but no crash, reboot, or privilege gain.

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

What happened

Resource leak in Linux kernel RxRPC allows local users to exhaust kernel resources by peeking released calls with recvmsg(). In rxrpc_recvmsg(), the already-released-call path fails to drop its held call reference when MSG_PEEK is set. A local process must use an AF_RXRPC socket and MSG_PEEK; the public record identifies retained references but no crash, reboot, or privilege gain.

The record

CVE
CVE-2026-74432
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 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=6.12.40 <6.12.97
  2. Affected versionversion=6.15.8 <6.16
  3. Affected versionversion=6.16
  4. Affected versionversion=6.6.100 <6.6.145
  5. Affected versionversion=6c75a97a32a5fa2060c3dd30207e63b6914b606d
  6. Affected versionversion=7692bde890061797f3dece0148d7859e85c55778 <86eff3140c9d4b52bba13d1cba266da933403e51
  7. Affected versionversion=839fe96c15209dc2255c064bb44b636efe04f032 <e473cd3046a1aaec1e39af5df2042ce7c04d5e74
  8. Affected versionversion=962fb1f651c2cf2083e0c3ef53ba69e3b96d3fbc <04c7103dc0923cc6ac95b97aa66bab70da7ace84
  9. Affected versionversion=962fb1f651c2cf2083e0c3ef53ba69e3b96d3fbc <2b69b61057eb0b3db9ad754ef0f1436b7af3a9f5
  10. Affected versionversion=962fb1f651c2cf2083e0c3ef53ba69e3b96d3fbc <4bdb9e471f5b1ac9cbe4add5de7ff085a0ec303c

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.12.40 <6.12.97; version=6.15.8 <6.16; version=6.16; version=6.6.100 <6.6.145; version=6c75a97a32a5fa2060c3dd30207e63b6914b606d; version=7692bde890061797f3dece0148d7859e85c55778 <86eff3140c9d4b52bba13d1cba266da933403e51; version=839fe96c15209dc2255c064bb44b636efe04f032 <e473cd3046a1aaec1e39af5df2042ce7c04d5e74; version=962fb1f651c2cf2083e0c3ef53ba69e3b96d3fbc <04c7103dc0923cc6ac95b97aa66bab70da7ace84; version=962fb1f651c2cf2083e0c3ef53ba69e3b96d3fbc <2b69b61057eb0b3db9ad754ef0f1436b7af3a9f5; version=962fb1f651c2cf2083e0c3ef53ba69e3b96d3fbc <4bdb9e471f5b1ac9cbe4add5de7ff085a0ec303c

Published CVSS scores

5.5OracleCVSS: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

T1499.004Application 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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