Use-after-free in Linux kernel's net/sched: cls_u32 component

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Summary

CVECVE-2023-3609
StatePUBLISHED
AssignerGoogle
Source PriorityCVE Program / NVD first with legacy fallback
Published2023-07-21 21:15:11 UTC
Updated2026-07-30 17:16:27 UTC
DescriptionA use-after-free vulnerability in the Linux kernel's net/sched: cls_u32 component can be exploited to achieve local privilege escalation. If tcf_change_indev() fails, u32_set_parms() will immediately return an error after incrementing or decrementing the reference counter in tcf_bind_filter(). If an attacker can control the reference counter and set it to zero, they can cause the reference to be freed, leading to a use-after-free vulnerability. We recommend upgrading past commit 04c55383fa5689357bcdd2c8036725a55ed632bc.

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

EPSS: 0.004500000 probability, percentile 0.369370000 (date 2026-08-01)

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 Debian Debian Linux 10.0 All All All
Operating System Debian Debian Linux 11.0 All All All
Operating System Linux Linux Kernel All All All All
Operating System Linux Linux Kernel 6.4 rc1 All All
Operating System Linux Linux Kernel 6.4 rc2 All All
Operating System Linux Linux Kernel 6.4 rc3 All All
Operating System Linux Linux Kernel 6.4 rc4 All All
Operating System Linux Linux Kernel 6.4 rc5 All All
Operating System Linux Linux Kernel 6.4 rc6 All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Kernel affected 4.14.0 4.14.322 semver Linux
CNA Linux Kernel affected 4.15.0 4.19.291 semver Linux
CNA Linux Kernel affected 4.20.0 5.4.248 semver Linux
CNA Linux Kernel affected 5.5.0 5.10.185 semver Linux
CNA Linux Kernel affected 5.11.0 5.15.118 semver Linux
CNA Linux Kernel affected 5.16.0 6.1.35 semver Linux
CNA Linux Kernel affected 6.2.0 6.3.9 semver Linux
CNA Linux Kernel unaffected 6.4.0 semver Linux
CNA Linux Kernel unaffected 04c55383fa5689357bcdd2c8036725a55ed632bc git Linux

References

ReferenceSourceLinkTags
Kernel Live Patch Security Notice LSN-0098-1 ≈ Packet Storm af854a3a-2127-422b-91ae-364da2661108 packetstormsecurity.com Third Party Advisory, VDB Entry
kernel/git/torvalds/linux.git - Linux kernel source tree af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Mailing List, Patch, Vendor Advisory
[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
July 2023 Linux Kernel 6.3 Vulnerabilities in NetApp Products | NetApp Product Security af854a3a-2127-422b-91ae-364da2661108 security.netapp.com Third Party Advisory
kernel.dance/04c55383fa5689357bcdd2c8036725a55ed632bc af854a3a-2127-422b-91ae-364da2661108 kernel.dance Vendor Advisory
packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html af854a3a-2127-422b-91ae-364da2661108 packetstormsecurity.com
lists.debian.org/debian-lts-announce/2024/01/msg00004.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 160971 Oracle Enterprise Linux Security Update for kernel (ELSA-2023-5622)
  • 161066 Oracle Enterprise Linux Security Update for kernel (ELSA-2023-6583)
  • 161147 Oracle Enterprise Linux Security Update for kernel (ELSA-2023-7077)
  • 199651 Ubuntu Security Notification for Linux kernel (OEM) Vulnerabilities (USN-6285-1)
  • 199764 Ubuntu Security Notification for Linux kernel (OEM) Vulnerabilities (USN-6385-1)
  • 199784 Ubuntu Security Notification for Linux kernel (BlueField) Vulnerabilities (USN-6397-1)
  • 242143 Red Hat Update for kpatch-patch (RHSA-2023:5574)
  • 242147 Red Hat Update for kernel (RHSA-2023:5628)
  • 242158 Red Hat Update for kernel (RHSA-2023:5622)
  • 242159 Red Hat Update for kernel-rt (RHSA-2023:5621)
  • 242179 Red Hat Update for kpatch-patch (RHSA-2023:5775)
  • 242188 Red Hat Update for kernel-rt (RHSA-2023:5794)
  • 242340 Red Hat Update for kpatch-patch (RHSA-2023:6799)
  • 242343 Red Hat Update for kernel (RHSA-2023:6813)
  • 242399 Red Hat Update for kernel security (RHSA-2023:6583)
  • 242434 Red Hat Update for kernel-rt security (RHSA-2023:6901)
  • 242451 Red Hat Update for kernel security (RHSA-2023:7077)
  • 242482 Red Hat Update for kernel-rt (RHSA-2023:7379)
  • 242487 Red Hat Update for kpatch-patch (RHSA-2023:7410)
  • 242496 Red Hat Update for kpatch-patch (RHSA-2023:7417)
  • 242497 Red Hat Update for kpatch-patch (RHSA-2023:7418)
  • 242500 Red Hat Update for kernel-rt (RHSA-2023:7431)
  • 242504 Red Hat Update for kernel (RHSA-2023:7434)
  • 242518 Red Hat Update for kpatch-patch (RHSA-2023:7558)
  • 242521 Red Hat Update for kernel security (RHSA-2023:7539)
  • 242612 Red Hat Update for kernel security (RHSA-2023:7370)
  • 242617 Red Hat Update for kernel (RHSA-2023:7398)
  • 243050 Red Hat Update for kernel (RHSA-2024:1250)
  • 243053 Red Hat Update for kernel live patch module (RHSA-2024:1253)
  • 243062 Red Hat Update for kernel-rt (RHSA-2024:1306)
  • 257259 CentOS Security Update for kernel
  • 355761 Amazon Linux Security Advisory for kernel : ALAS-2023-1792
  • 355771 Amazon Linux Security Advisory for kernel : ALAS2-2023-2179
  • 355795 Amazon Linux Security Advisory for kernel : ALAS2KERNEL-5.10-2023-038
  • 356185 Amazon Linux Security Advisory for kernel-livepatch : ALASLIVEPATCH-2023-147
  • 356207 Amazon Linux Security Advisory for kernel-livepatch : ALASLIVEPATCH-2023-146
  • 356208 Amazon Linux Security Advisory for kernel-livepatch : ALASLIVEPATCH-2023-143
  • 356217 Amazon Linux Security Advisory for kernel-livepatch : ALASLIVEPATCH-2023-145
  • 356228 Amazon Linux Security Advisory for kernel-livepatch : ALASLIVEPATCH-2023-142
  • 356276 Amazon Linux Security Advisory for kernel-livepatch : ALASLIVEPATCH-2023-144
  • 356284 Amazon Linux Security Advisory for kernel-livepatch : ALASLIVEPATCH-2023-148
  • 356494 Amazon Linux Security Advisory for kernel-livepatch : ALAS2LIVEPATCH-2023-148
  • 356524 Amazon Linux Security Advisory for kernel-livepatch : ALAS2023LIVEPATCH-2023-015
  • 356535 Amazon Linux Security Advisory for kernel-livepatch : ALAS2023LIVEPATCH-2023-013
  • 356537 Amazon Linux Security Advisory for kernel-livepatch : ALAS2023LIVEPATCH-2023-012
  • 356544 Amazon Linux Security Advisory for kernel-livepatch : ALAS2023LIVEPATCH-2023-014
  • 378889 Alibaba Cloud Linux Security Update for cloud-kernel (ALINUX2-SA-2023:0036)
  • 378892 Alibaba Cloud Linux Security Update for cloud-kernel (ALINUX3-SA-2023:0114)
  • 379043 Alibaba Cloud Linux Security Update for cloud-kernel (ALINUX3-SA-2023:0136)
  • 6000212 Debian Security Update for linux (DSA 5480-1)
  • 6000265 Debian Security Update for linux-5.10 (DLA 3623-1)
  • 6000429 Debian Security Update for linux (DLA 3710-1)
  • 6140136 AWS Bottlerocket Security Update for kernel (GHSA-rpcx-hw6h-5p83)
  • 673354 EulerOS Security Update for kernel (EulerOS-SA-2023-2843)
  • 673372 EulerOS Security Update for kernel (EulerOS-SA-2023-2787)
  • 673449 EulerOS Security Update for kernel (EulerOS-SA-2023-2898)
  • 673496 EulerOS Security Update for kernel (EulerOS-SA-2023-2860)
  • 673498 EulerOS Security Update for kernel (EulerOS-SA-2023-3132)
  • 673604 EulerOS Security Update for kernel (EulerOS-SA-2023-2811)
  • 673970 EulerOS Security Update for kernel (EulerOS-SA-2023-2879)
  • 754275 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:3309-1)
  • 754281 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:3349-1)
  • 754919 SUSE Enterprise Linux Security Update for the Linux Kernel RT (Live Patch 9 for SLE 15 SP4) (SUSE-SU-2023:3773-1)
  • 754920 SUSE Enterprise Linux Security Update for the Linux Kernel RT (Live Patch 0 for SLE 15 SP5) (SUSE-SU-2023:3772-1)
  • 754921 SUSE Enterprise Linux Security Update for the Linux Kernel (Live Patch 39 for SLE 15 SP1) (SUSE-SU-2023:3768-1)
  • 754922 SUSE Enterprise Linux Security Update for the Linux Kernel RT (Live Patch 1 for SLE 15 SP5) (SUSE-SU-2023:3784-1)
  • 754923 SUSE Enterprise Linux Security Update for the Linux Kernel RT (Live Patch 6 for SLE 15 SP4) (SUSE-SU-2023:3783-1)
  • 754924 SUSE Enterprise Linux Security Update for the Linux Kernel (Live Patch 37 for SLE 15 SP1) (SUSE-SU-2023:3786-1)
  • 754927 SUSE Enterprise Linux Security Update for the Linux Kernel (Live Patch 31 for SLE 15 SP2) (SUSE-SU-2023:3788-1)
  • 754939 SUSE Enterprise Linux Security Update for the Linux Kernel (Live Patch 30 for SLE 15 SP2) (SUSE-SU-2023:3812-1)
  • 754941 SUSE Enterprise Linux Security Update for the Linux Kernel (Live Patch 42 for SLE 15 SP1) (SUSE-SU-2023:3809-1)
  • 754947 SUSE Enterprise Linux Security Update for the Linux Kernel (Live Patch 33 for SLE 15 SP2) (SUSE-SU-2023:3844-1)
  • 754948 SUSE Enterprise Linux Security Update for the Linux Kernel (Live Patch 40 for SLE 15 SP1) (SUSE-SU-2023:3838-1)
  • 754976 SUSE Enterprise Linux Security Update for the Linux Kernel (Live Patch 36 for SLE 15 SP2) (SUSE-SU-2023:3846-1)
  • 754990 SUSE Enterprise Linux Security Update for the Linux Kernel (Live Patch 23 for SLE 15 SP3) (SUSE-SU-2023:3892-1)
  • 754992 SUSE Enterprise Linux Security Update for the Linux Kernel (Live Patch 38 for SLE 15 SP2) (SUSE-SU-2023:3889-1)
  • 754993 SUSE Enterprise Linux Security Update for the Linux Kernel (Live Patch 32 for SLE 15 SP2) (SUSE-SU-2023:3893-1)
  • 755002 SUSE Enterprise Linux Security Update for the Linux Kernel (Live Patch 2 for SLE 15 SP5) (SUSE-SU-2023:3924-1)
  • 755003 SUSE Enterprise Linux Security Update for the Linux Kernel (Live Patch 1 for SLE 15 SP5) (SUSE-SU-2023:3923-1)
  • 755004 SUSE Enterprise Linux Security Update for the Linux Kernel (Live Patch 13 for SLE 15 SP4) (SUSE-SU-2023:3922-1)
  • 755006 SUSE Enterprise Linux Security Update for the Linux Kernel (Live Patch 26 for SLE 15 SP3) (SUSE-SU-2023:3928-1)
  • 907112 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (27726-1)
  • 907162 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (27676-1)
  • 941453 AlmaLinux Security Update for kernel (ALSA-2023:7077)

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