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Full vulnerability report · 2026
CVE-2026-64336High confidence

USB: serial: keyspan_pda: fix information leak

Linux · Linux

5.5MediumCVSS 3.1
Recommended action
Scheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available
Distribution package intelligence

Ubuntu vendor package status

Canonical’s release and source-package findings are shown separately from local repository availability.

20 package states
Repository candidate not checked

A published vendor fix does not prove that a matching update is enabled and installable on a particular asset. Confirm the local package candidate before scheduling remediation.

Ubuntu releaseSource packageVendor stateFixed versionEvidence
Ubuntu 24.04 LTSnoble · standard archivelinuxAffected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.Not published in this feedCanonical record ↗Source updated 11 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-awsAffected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.Not published in this feedCanonical record ↗Source updated 11 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-azureAffected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.Not published in this feedCanonical record ↗Source updated 11 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-azure-fdeAffected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.Not published in this feedCanonical record ↗Source updated 11 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-azure-nvidiaAffected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.Not published in this feedCanonical record ↗Source updated 11 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-gcpAffected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.Not published in this feedCanonical record ↗Source updated 11 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-gkeAffected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.Not published in this feedCanonical record ↗Source updated 11 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-gkeopAffected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.Not published in this feedCanonical record ↗Source updated 11 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-ibmAffected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.Not published in this feedCanonical record ↗Source updated 11 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-lowlatencyAffected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.Not published in this feedCanonical record ↗Source updated 11 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-nvidiaAffected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.Not published in this feedCanonical record ↗Source updated 11 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-nvidia-lowlatencyAffected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.Not published in this feedCanonical record ↗Source updated 11 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-nvidia-tegraAffected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.Not published in this feedCanonical record ↗Source updated 11 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-oem-6.11Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.Not published in this feedCanonical record ↗Source updated 11 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-oracleAffected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.Not published in this feedCanonical record ↗Source updated 11 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-raspiAffected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.Not published in this feedCanonical record ↗Source updated 11 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-raspi-realtimeAffected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.Not published in this feedCanonical record ↗Source updated 11 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-realtimeAffected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.Not published in this feedCanonical record ↗Source updated 11 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-riscvAffected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.Not published in this feedCanonical record ↗Source updated 11 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-xilinxAffected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.Not published in this feedCanonical record ↗Source updated 11 Sept 2026
Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

1 current
CVE-2026-64336 · CSAF 2.0 · revision 3 · finalRed Hat Product Securitykernel: USB: serial: keyspan_pda: fix information leak
246 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • kernel as a component of Red Hat Enterprise Linux 10
  • kernel-64k as a component of Red Hat Enterprise Linux 10
  • kernel-64k-core as a component of Red Hat Enterprise Linux 10
  • kernel-64k-debug as a component of Red Hat Enterprise Linux 10
  • kernel-64k-debug-core as a component of Red Hat Enterprise Linux 10
  • kernel-64k-debug-devel as a component of Red Hat Enterprise Linux 10
  • kernel-64k-debug-devel-matched as a component of Red Hat Enterprise Linux 10
  • kernel-64k-debug-modules as a component of Red Hat Enterprise Linux 10
  • kernel-64k-debug-modules-core as a component of Red Hat Enterprise Linux 10
  • kernel-64k-debug-modules-extra as a component of Red Hat Enterprise Linux 10
  • kernel-64k-devel as a component of Red Hat Enterprise Linux 10
  • kernel-64k-devel-matched as a component of Red Hat Enterprise Linux 10
Summary
A flaw was found in the Linux kernel's keyspan_pda USB serial driver. An issue with the write() callback function allows it to report more data written than was actually provided. This can lead to the system writing data beyond its allocated buffer, resulting in an information leak. A local attacker could exploit this to potentially gain access to sensitive information.
Remediation
Fix deferred
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2026-48880

No EUVD known-exploited evidence

In the Linux kernel, the following vulnerability has been resolved: USB: serial: keyspan_pda: fix information leak The write() callback is supposed to return the number of characters accepted or a negative errno. Since the addition of write fifo support the keyspan_pda implementation will however return the number characters submitted to the device if the write urb is not already in use. If this number is larger than the number of characters passed to write(), the line discipline continues writing data from beyond the tty write buffer. Fix the information leak by making sure that keyspan_pda_write_start() returns zero on success as intended.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
0.0
Advisory evidence
No linked advisory details stored yet
Recommended actionScheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available
01

What, why and how

In the Linux kernel, the following vulnerability has been resolved: USB: serial: keyspan_pda: fix information leak The write() callback is supposed to return the number of characters accepted or a negative errno. Since the addition of write fifo support the keyspan_pda implementation will however return the number characters submitted to the device if the write urb is not already in use. If this number is larger than the number of characters passed to write(), the line discipline continues writing data from beyond the tty write buffer. Fix the information leak by making sure that keyspan_pda_write_start() returns zero on success as intended.

What

In the Linux kernel, the following vulnerability has been resolved: USB: serial: keyspan_pda: fix information leak The write() callback is supposed to return the number of characters accepted or a negative errno. Since the addition of write fifo support the keyspan_pda implementation will however return the number characters submitted to the device if the write urb is not already in use. If this number is larger than the number of characters passed to write(), the line discipline continues writing data from beyond the tty write buffer. Fix the information leak by making sure that keyspan_pda_write_start() returns zero on success as intended.

Why

The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.

How

An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

In the Linux kernel, the following vulnerability has been resolved: USB: serial: keyspan_pda: fix information leak The write() callback is supposed to return the number of characters accepted or a negative errno. Since the addition of write fifo support the keyspan_pda implementation will however return the number characters submitted to the device if the write urb is not already in use. If this number is larger than the number of characters passed to write(), the line discipline continues writing data from beyond the tty write buffer. Fix the information leak by making sure that keyspan_pda_write_start() returns zero on success as intended.

Why

The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.

How

An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
local access → Missing Release of Memory after Effective Lifetime → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Local
Privileges required
Low: a basic authenticated account is required
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-401 ↗

CWE-401: Missing Release of Memory after Effective Lifetime. The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVLocalAttack vector: The attacker needs local access to the vulnerable system.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRLowPrivileges required: The attacker needs basic user-level privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CNoneConfidentiality impact: No direct loss is represented by this metric.INoneIntegrity impact: No direct loss is represented by this metric.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
The issue can support a local privilege or sandbox boundary transition; normal system utilities may then be available in the gained context.
CWE-401
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

ENISA EUVD · EUVD-2026-48880Official EUVD mapping

In the Linux kernel, the following vulnerability has been resolved: USB: serial: keyspan_pda: fix information leak The write() callback is supposed to return the number of characters accepted or a negative errno. Since the addition of write fifo support the keyspan_pda implementation will however return the number characters submitted to the device if the write urb is not already in use. If this number is larger than the number of characters passed to write(), the line discipline continues writing data from beyond the tty write buffer. Fix the information leak by making sure that keyspan_pda_write_start() returns zero on success as intended.

Official EUVD record ↗
BSI · German · WID-SEC-2026-2527Linux Kernel: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen im Linux Kernel ausnutzen, um nicht näher spezifizierte Angriffe durchzuführen, dazu können DoS-Angriffe, die Offenlegung von Informationen, die Beschädigung des Speichers oder die Umgehung von Sicherheitsmaßnahmen gehören.

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-1162Multiples vulnérabilités dans le noyau Linux d'Ubuntu

d?id=CVE-2026-64327 Référence CVE CVE-2026-64328 https://www.cve.org/CVERecord?id=CVE-2026-64328 Référence CVE CVE-2026-64329 https://www.cve.org/CVERecord?id=CVE-2026-64329 Référence CVE CVE-2026-64330 https://www.cve.org/CVERecord?id=CVE-2026-64330 Référence CVE CVE-2026-64331 https://www.cve.org/CVERecord?id=CVE-2026-64331 Référence CVE CVE-2026-64332 https://www.cve.org/CVERecord?id=CVE-2026-64332 Référence CVE CVE-2026-64333 https://www.cve.org/CVERecord?id=CVE-2026-64333 Référence CVE CVE-2026-64334 https://www.cve.org/CVERecord?id=CVE-2026-64334 Référence CVE CVE-2026-64335 https://www.cve.org/CVERecord?id=CVE-2026-64335 Référence CVE CVE-2026-64336 https://www.cve.org/CVERecord?id=CVE-2026-64336 Référence CVE CVE-2026-64337 https://www.cve.org/CVERecord?id=CVE-2026-64337 Référence CVE CVE-2026-64338 https://www.cve.org/CVERecord?id=CVE-2026-64338 Référence CVE CVE-2026-64339 https://www.cve.org/CVERecord?id=CVE-2026-64339 Référence CVE CVE-2026-64340 https://www.cve.org/CVERecord?id=CVE-2026-64340 Référence CVE CVE-2026-64341 https://www.cve.org/CVERecord?id=CVE-2026-64341 Référence CVE CVE-2026-64342 https://www.cve.org/CVERecord?id=CVE-2026-64342 Référence CVE CVE-2026-64343 https://www.cve.org/CVERecord?id=CVE-2026-64343 Référence CVE CVE-2026-64344 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-1091Multiples vulnérabilités dans le noyau Linux de SUSE

d?id=CVE-2026-64191 Référence CVE CVE-2026-64220 https://www.cve.org/CVERecord?id=CVE-2026-64220 Référence CVE CVE-2026-64221 https://www.cve.org/CVERecord?id=CVE-2026-64221 Référence CVE CVE-2026-64223 https://www.cve.org/CVERecord?id=CVE-2026-64223 Référence CVE CVE-2026-64231 https://www.cve.org/CVERecord?id=CVE-2026-64231 Référence CVE CVE-2026-64234 https://www.cve.org/CVERecord?id=CVE-2026-64234 Référence CVE CVE-2026-64242 https://www.cve.org/CVERecord?id=CVE-2026-64242 Référence CVE CVE-2026-64298 https://www.cve.org/CVERecord?id=CVE-2026-64298 Référence CVE CVE-2026-64330 https://www.cve.org/CVERecord?id=CVE-2026-64330 Référence CVE CVE-2026-64336 https://www.cve.org/CVERecord?id=CVE-2026-64336 Référence CVE CVE-2026-64345 https://www.cve.org/CVERecord?id=CVE-2026-64345 Référence CVE CVE-2026-64347 https://www.cve.org/CVERecord?id=CVE-2026-64347 Référence CVE CVE-2026-64465 https://www.cve.org/CVERecord?id=CVE-2026-64465 Référence CVE CVE-2026-64530 https://www.cve.org/CVERecord?id=CVE-2026-64530 Référence CVE CVE-2026-64560 https://www.cve.org/CVERecord?id=CVE-2026-64560 Référence CVE CVE-2026-64561 https://www.cve.org/CVERecord?id=CVE-2026-64561 Référence CVE CVE-2026-64564 https://www.cve.org/CVERecord?id=CVE-2026-64564 Référence CVE CVE-2026-64600 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-1064Multiples vulnérabilités dans le noyau Linux de SUSE

d?id=CVE-2026-64220 Référence CVE CVE-2026-64221 https://www.cve.org/CVERecord?id=CVE-2026-64221 Référence CVE CVE-2026-64223 https://www.cve.org/CVERecord?id=CVE-2026-64223 Référence CVE CVE-2026-64231 https://www.cve.org/CVERecord?id=CVE-2026-64231 Référence CVE CVE-2026-64233 https://www.cve.org/CVERecord?id=CVE-2026-64233 Référence CVE CVE-2026-64234 https://www.cve.org/CVERecord?id=CVE-2026-64234 Référence CVE CVE-2026-64241 https://www.cve.org/CVERecord?id=CVE-2026-64241 Référence CVE CVE-2026-64242 https://www.cve.org/CVERecord?id=CVE-2026-64242 Référence CVE CVE-2026-64330 https://www.cve.org/CVERecord?id=CVE-2026-64330 Référence CVE CVE-2026-64336 https://www.cve.org/CVERecord?id=CVE-2026-64336 Référence CVE CVE-2026-64345 https://www.cve.org/CVERecord?id=CVE-2026-64345 Référence CVE CVE-2026-64347 https://www.cve.org/CVERecord?id=CVE-2026-64347 Référence CVE CVE-2026-64357 https://www.cve.org/CVERecord?id=CVE-2026-64357 Référence CVE CVE-2026-64465 https://www.cve.org/CVERecord?id=CVE-2026-64465 Référence CVE CVE-2026-64528 https://www.cve.org/CVERecord?id=CVE-2026-64528 Référence CVE CVE-2026-64530 https://www.cve.org/CVERecord?id=CVE-2026-64530 Référence CVE CVE-2026-64560 https://www.cve.org/CVERecord?id=CVE-2026-64560 Référence CVE CVE-2026-64561 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-1031Multiples vulnérabilités dans le noyau Linux de Debian LTS

d?id=CVE-2026-64327 Référence CVE CVE-2026-64328 https://www.cve.org/CVERecord?id=CVE-2026-64328 Référence CVE CVE-2026-64329 https://www.cve.org/CVERecord?id=CVE-2026-64329 Référence CVE CVE-2026-64330 https://www.cve.org/CVERecord?id=CVE-2026-64330 Référence CVE CVE-2026-64331 https://www.cve.org/CVERecord?id=CVE-2026-64331 Référence CVE CVE-2026-64332 https://www.cve.org/CVERecord?id=CVE-2026-64332 Référence CVE CVE-2026-64333 https://www.cve.org/CVERecord?id=CVE-2026-64333 Référence CVE CVE-2026-64334 https://www.cve.org/CVERecord?id=CVE-2026-64334 Référence CVE CVE-2026-64335 https://www.cve.org/CVERecord?id=CVE-2026-64335 Référence CVE CVE-2026-64336 https://www.cve.org/CVERecord?id=CVE-2026-64336 Référence CVE CVE-2026-64337 https://www.cve.org/CVERecord?id=CVE-2026-64337 Référence CVE CVE-2026-64338 https://www.cve.org/CVERecord?id=CVE-2026-64338 Référence CVE CVE-2026-64340 https://www.cve.org/CVERecord?id=CVE-2026-64340 Référence CVE CVE-2026-64341 https://www.cve.org/CVERecord?id=CVE-2026-64341 Référence CVE CVE-2026-64342 https://www.cve.org/CVERecord?id=CVE-2026-64342 Référence CVE CVE-2026-64343 https://www.cve.org/CVERecord?id=CVE-2026-64343 Référence CVE CVE-2026-64344 https://www.cve.org/CVERecord?id=CVE-2026-64344 Référence CVE CVE-2026-64345 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-0982Multiples vulnérabilités dans le noyau Linux de Debian LTS

d?id=CVE-2026-64323 Référence CVE CVE-2026-64324 https://www.cve.org/CVERecord?id=CVE-2026-64324 Référence CVE CVE-2026-64329 https://www.cve.org/CVERecord?id=CVE-2026-64329 Référence CVE CVE-2026-64330 https://www.cve.org/CVERecord?id=CVE-2026-64330 Référence CVE CVE-2026-64331 https://www.cve.org/CVERecord?id=CVE-2026-64331 Référence CVE CVE-2026-64332 https://www.cve.org/CVERecord?id=CVE-2026-64332 Référence CVE CVE-2026-64333 https://www.cve.org/CVERecord?id=CVE-2026-64333 Référence CVE CVE-2026-64334 https://www.cve.org/CVERecord?id=CVE-2026-64334 Référence CVE CVE-2026-64335 https://www.cve.org/CVERecord?id=CVE-2026-64335 Référence CVE CVE-2026-64336 https://www.cve.org/CVERecord?id=CVE-2026-64336 Référence CVE CVE-2026-64337 https://www.cve.org/CVERecord?id=CVE-2026-64337 Référence CVE CVE-2026-64338 https://www.cve.org/CVERecord?id=CVE-2026-64338 Référence CVE CVE-2026-64340 https://www.cve.org/CVERecord?id=CVE-2026-64340 Référence CVE CVE-2026-64342 https://www.cve.org/CVERecord?id=CVE-2026-64342 Référence CVE CVE-2026-64343 https://www.cve.org/CVERecord?id=CVE-2026-64343 Référence CVE CVE-2026-64344 https://www.cve.org/CVERecord?id=CVE-2026-64344 Référence CVE CVE-2026-64345 https://www.cve.org/CVERecord?id=CVE-2026-64345 Référence CVE CVE-2026-64346 https://www.cve.org/CVERecord?id=

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2026-032041LinuxのLinux Kernelにおける有効期限後のメモリの解放の欠如に関する脆弱性

Linuxカーネルにおいて以下の脆弱性が修正されました：USBのserialキーであるkeyspan_pdaに関する情報漏洩の修正です。write()コールバックは、受け入れた文字数または負のerrnoを返すことが想定されています。しかし、write fifoサポートの追加に伴い、keyspan_pdaの実装では、write urbが既に使用中でない場合にデバイスに送信された文字数を返していました。この数がwrite()に渡された文字数より大きいと、ラインディシプリンはtty書き込みバッファの範囲を超えてデータを書き続けてしまいます。これを防ぐため、keyspan_pda_write_start()が正常成功時にはゼロを返すように修正し、情報漏洩の問題を解決しました。

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
Fixed
Linux: < 5.11, 5.15.212 ≤ 5.15.*, 6.1.178 ≤ 6.1.*, 6.6.145 ≤ 6.6.*, 6.12.96 ≤ 6.12.*, 6.18.39 ≤ 6.18.*, 7.1.4 ≤ 7.1.*, 7.2 ≤ *
Action
Review the linked authoritative reference and apply the recorded fixed release appropriate to the affected product branch.
Workaround
No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04

Evidence and provenance

Published 25 Jul 2026 · Last source change 23 Aug 2026, 12:45 UTC · CWE-401 · Missing Release of Memory after Effective Lifetime

CVE recordCVE.org · 5.2
CVSS sourceNIST NVD
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2026-48880
Product sourceVendor CSAF · Red Hat Product Security
Remediation sourceVendor CSAF · Red Hat Product Security
CWE sourceNIST NVD
NVD statusNVD enriched

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗
  1. Vendor guidanceAuthoritative vendor guidance changed from authoritative remediation link to authoritative remediation link · patch.
    Before
    authoritative remediation link
    After
    authoritative remediation link · patch
    416baaa9-dc9f-4396-8d5f-8c081fb06d67 ↗
  2. SeveritySeverity changed from Unknown to Medium.
    Before
    Unknown
    After
    Medium
    NIST NVD ↗
  3. CVSS scoreCVSS score changed from not recorded to 5.5 (CVSS 3.1 · NIST NVD · CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).
    Before
    not recorded
    After
    5.5 (CVSS 3.1 · NIST NVD · CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
    NIST NVD ↗
  4. Vendor guidanceAuthoritative vendor guidance changed from authoritative remediation link to authoritative remediation link.
    Before
    authoritative remediation link
    After
    authoritative remediation link
    CNA ↗
  5. Affected versionsThe structured affected or fixed version information changed.
    Before
    034e38e8f68767fb5438ae3e608ee82919674177 < b069b7029862fafaff331d4c664d97d4ae828d6d; 034e38e8f68767fb5438ae3e608ee82919674177 < e52ca411f50539ff1d0c877b9312771ca8a858c1; 034e38e8f68767fb5438ae3e608ee82919674177 < 2f7a6b8ab3845bd1da02604f1a874b52a4555a72; 034e38e8f68767fb5438ae3e608ee82919674177 < e1494191a3aac665d3a2fce16169a97c346253ec; 034e38e8f68767fb5438ae3e608ee82919674177 < cf6ca0aefae03958cfb5b189b0adbfb25c06bfac; 034e38e8f68767fb5438ae3e608ee82919674177 < d4b12b6b395e43a2b1d80be3745631fcaa9c047b; 034e38e8f68767fb5438ae3e608ee82919674177 < 6bfc8d01ac4068eced509f8fc74d0cd205e4dcec; 5.11 · Fixed: < 5.11; 5.15.212 ≤ 5.15.*; 6.1.178 ≤ 6.1.*; 6.6.145 ≤ 6.6.*; 6.12.96 ≤ 6.12.*; 6.18.39 ≤ 6.18.*; 7.1.4 ≤ 7.1.*; 7.2 ≤ *
    After
    02407bc7d42347da7ed2a3926a0b824bfc614914 < cccef1711efbcdbe999738ac27d37b9ef6271abd; 034e38e8f68767fb5438ae3e608ee82919674177 < b069b7029862fafaff331d4c664d97d4ae828d6d; 034e38e8f68767fb5438ae3e608ee82919674177 < e52ca411f50539ff1d0c877b9312771ca8a858c1; 034e38e8f68767fb5438ae3e608ee82919674177 < 2f7a6b8ab3845bd1da02604f1a874b52a4555a72; 034e38e8f68767fb5438ae3e608ee82919674177 < e1494191a3aac665d3a2fce16169a97c346253ec; 034e38e8f68767fb5438ae3e608ee82919674177 < cf6ca0aefae03958cfb5b189b0adbfb25c06bfac; 034e38e8f68767fb5438ae3e608ee82919674177 < d4b12b6b395e43a2b1d80be3745631fcaa9c047b; 034e38e8f68767fb5438ae3e608ee82919674177 < 6bfc8d01ac4068eced509f8fc74d0cd205e4dcec · Fixed: < 5.11; 5.15.212 ≤ 5.15.*; 6.1.178 ≤ 6.1.*; 6.6.145 ≤ 6.6.*; 6.12.96 ≤ 6.12.*; 6.18.39 ≤ 6.18.*; 7.1.4 ≤ 7.1.*; 7.2 ≤ *
    CNA ↗
  6. Affected versionsThe structured affected or fixed version information changed.
    Before
    034e38e8f68767fb5438ae3e608ee82919674177 < b069b7029862fafaff331d4c664d97d4ae828d6d; 034e38e8f68767fb5438ae3e608ee82919674177 < e52ca411f50539ff1d0c877b9312771ca8a858c1; 034e38e8f68767fb5438ae3e608ee82919674177 < 2f7a6b8ab3845bd1da02604f1a874b52a4555a72; 034e38e8f68767fb5438ae3e608ee82919674177 < e1494191a3aac665d3a2fce16169a97c346253ec; 034e38e8f68767fb5438ae3e608ee82919674177 < cf6ca0aefae03958cfb5b189b0adbfb25c06bfac; 034e38e8f68767fb5438ae3e608ee82919674177 < d4b12b6b395e43a2b1d80be3745631fcaa9c047b; 034e38e8f68767fb5438ae3e608ee82919674177 < 6bfc8d01ac4068eced509f8fc74d0cd205e4dcec; 5.11 · Fixed: < 5.11; 5.15.212 ≤ 5.15.*; 6.1.178 ≤ 6.1.*; 6.6.145 ≤ 6.6.*; 6.12.96 ≤ 6.12.*; 6.18.39 ≤ 6.18.*; 7.1.4 ≤ 7.1.*; 7.2-rc3 ≤ *
    After
    034e38e8f68767fb5438ae3e608ee82919674177 < b069b7029862fafaff331d4c664d97d4ae828d6d; 034e38e8f68767fb5438ae3e608ee82919674177 < e52ca411f50539ff1d0c877b9312771ca8a858c1; 034e38e8f68767fb5438ae3e608ee82919674177 < 2f7a6b8ab3845bd1da02604f1a874b52a4555a72; 034e38e8f68767fb5438ae3e608ee82919674177 < e1494191a3aac665d3a2fce16169a97c346253ec; 034e38e8f68767fb5438ae3e608ee82919674177 < cf6ca0aefae03958cfb5b189b0adbfb25c06bfac; 034e38e8f68767fb5438ae3e608ee82919674177 < d4b12b6b395e43a2b1d80be3745631fcaa9c047b; 034e38e8f68767fb5438ae3e608ee82919674177 < 6bfc8d01ac4068eced509f8fc74d0cd205e4dcec; 5.11 · Fixed: < 5.11; 5.15.212 ≤ 5.15.*; 6.1.178 ≤ 6.1.*; 6.6.145 ≤ 6.6.*; 6.12.96 ≤ 6.12.*; 6.18.39 ≤ 6.18.*; 7.1.4 ≤ 7.1.*; 7.2 ≤ *
    CNA ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release or patch reference recorded
ENISA EUVD · EUVD-2026-48880↗Vendor CSAF · Red Hat Product Security↗CVE authority or vendor reference↗Patch or update reference↗Patch or update reference↗Patch or update reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2026-64336 · cve.blacktree.nl