Use after free in io_uring in the Linux Kernel

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Summary

CVECVE-2023-3389
StatePUBLISHED
AssignerGoogle
Source PriorityCVE Program / NVD first with legacy fallback
Published2023-06-28 20:15:09 UTC
Updated2026-10-14 21:17:16 UTC
DescriptionA use-after-free vulnerability in the Linux Kernel io_uring subsystem can be exploited to achieve local privilege escalation. Racing a io_uring cancel poll request with a linked timeout can cause a UAF in a hrtimer. We recommend upgrading past commit ef7dfac51d8ed961b742218f526bd589f3900a59 (4716c73b188566865bdd79c3a6709696a224ac04 for 5.10 stable and 0e388fce7aec40992eadee654193cad345d62663 for 5.15 stable).

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Problem Types: CWE-416 | CWE-416 CWE-416 Use After Free

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1[email protected]Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNACVSS7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Kernel affected 5.13 6.4 custom Not specified
CNA Linux Kernel affected 5.10.162 5.10.185 custom Not specified
ADP Siemens SIMATIC S7-1500 TM MFP - GNU/Linux Subsystem affected V1.1 custom Not specified

References

ReferenceSourceLinkTags
kernel.dance/0e388fce7aec40992eadee654193cad345d62663 af854a3a-2127-422b-91ae-364da2661108 kernel.dance Patch
[SECURITY] [DLA 3623-1] linux-5.10 security update af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Mailing List, Third Party Advisory
Debian -- Security Information -- DSA-5480-1 linux af854a3a-2127-422b-91ae-364da2661108 www.debian.org Third Party Advisory
Kernel Live Patch Security Notice LSN-0097-1 ≈ Packet Storm af854a3a-2127-422b-91ae-364da2661108 packetstormsecurity.com Third Party Advisory, VDB Entry
kernel/git/stable/linux.git - Linux kernel stable tree af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Mailing List, Patch
kernel/git/stable/linux.git - Linux kernel stable tree af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Mailing List, Patch
CVE-2023-3389 Linux Kernel Vulnerability in NetApp Products | NetApp Product Security af854a3a-2127-422b-91ae-364da2661108 security.netapp.com Third Party Advisory
kernel/git/torvalds/linux.git - Linux kernel source tree af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Mailing List, Patch
cert-portal.siemens.com/productcert/html/ssa-794697.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
kernel.dance/4716c73b188566865bdd79c3a6709696a224ac04 af854a3a-2127-422b-91ae-364da2661108 kernel.dance Patch
kernel.dance/ef7dfac51d8ed961b742218f526bd589f3900a59 af854a3a-2127-422b-91ae-364da2661108 kernel.dance Patch
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Querijn Voet (en)

Legacy QID Mappings

  • 199604 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-6246-1)
  • 199606 Ubuntu Security Notification for Linux kernel (OEM) Vulnerabilities (USN-6249-1)
  • 199608 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-6250-1)
  • 199610 Ubuntu Security Notification for Linux kernel (OEM) Vulnerabilities (USN-6248-1)
  • 199612 Ubuntu Security Notification for Linux kernel (Intel IoTG) Vulnerabilities (USN-6255-1)
  • 199618 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-6260-1)
  • 6000212 Debian Security Update for linux (DSA 5480-1)
  • 6000265 Debian Security Update for linux-5.10 (DLA 3623-1)
  • 673354 EulerOS Security Update for kernel (EulerOS-SA-2023-2843)
  • 673496 EulerOS Security Update for kernel (EulerOS-SA-2023-2860)
  • 907064 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (27354-1)
  • 907164 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (27349-1)
  • 907576 Common Base Linux Mariner (CBL-Mariner) Security Update for hyperv-daemons (31612-1)

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