Description
A use-after-free vulnerability in the Linux Kernel Performance Events system can be exploited to achieve local privilege escalation.
The perf_group_detach function did not check the event's siblings' attach_state before calling add_event_to_groups(), but remove_on_exec made it possible to call list_del_event() on before detaching from their group, making it possible to use a dangling pointer causing a use-after-free vulnerability.
We recommend upgrading past commit fd0815f632c24878e325821943edccc7fde947a2.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Linux | Linux Kernel | 5.13 – < 6.3 | 6.3 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | linux | 6.1.25-1 | — |
| Debian 13 | linux | 6.1.25-1 | — |
| Debian 12 | linux | 6.1.25-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Nvidia-BlueField 22.04 LTS | linux-bluefield | 5.15.0-1022.24 | — |
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux | 5.15.0-79.86 | USN-6300-1 |
| Ubuntu 22.04 LTS | linux-aws | 5.15.0-1042.47 | USN-6300-1 |
| Ubuntu 22.04 LTS | linux-azure | 5.15.0-1045.52 | USN-6332-1 |
| Ubuntu 22.04 LTS | linux-azure-fde | 5.15.0-1044.51.1 | USN-6332-1 |
| Ubuntu 22.04 LTS | linux-gcp | 5.15.0-1039.47 | USN-6300-1 |
| Ubuntu 22.04 LTS | linux-gke +1 | 5.15.0-1039.44 | USN-6311-1, USN-6300-1 |
| Ubuntu 22.04 LTS | linux-gkeop | 5.15.0-1025.30 | USN-6311-1 |
| Ubuntu 22.04 LTS | linux-ibm +1 | 5.15.0-1035.38 | USN-6300-1 |
| Ubuntu 22.04 LTS | linux-intel-iotg | 5.15.0-1037.42 | USN-6300-1 |
| Ubuntu 22.04 LTS | linux-lowlatency | 5.15.0-79.88 | USN-6300-1 |
| Ubuntu 22.04 LTS | linux-nvidia | 5.15.0-1030.30 | USN-6300-1 |
| Ubuntu 22.04 LTS | linux-nvidia-tegra | 5.15.0-1016.16 | — |
| Ubuntu 22.04 LTS | linux-nvidia-tegra-igx | 5.15.0-1002.2 | — |
| Ubuntu 22.04 LTS | linux-oem-6.0 | 6.0.0-1021.21 | USN-6385-1 |
| Ubuntu 22.04 LTS | linux-oem-6.1 | 6.1.0-1009.9 | — |
| Ubuntu 22.04 LTS | linux-oracle | 5.15.0-1040.46 | USN-6300-1 |
| Ubuntu 22.04 LTS | linux-riscv +11 | No fix yet | — |
| Ubuntu 22.04 LTS | linux-xilinx-zynqmp | 5.15.0-1025.29 | — |
| Ubuntu 20.04 LTS | linux-aws-5.15 | 5.15.0-1041.46~20.04.1 | USN-6300-1 |
| Ubuntu 20.04 LTS | linux-azure-5.15 | 5.15.0-1045.52~20.04.1 | USN-6332-1 |
| Ubuntu 20.04 LTS | linux-azure-fde-5.15 | 5.15.0-1043.50~20.04.1.1 | USN-6347-1 |
| Ubuntu 20.04 LTS | linux-gcp-5.15 | 5.15.0-1039.47~20.04.1 | USN-6311-1 |
| Ubuntu 20.04 LTS | linux-gke-5.15 | 5.15.0-1039.44~20.04.1 | USN-6311-1 |
| Ubuntu 20.04 LTS | linux-gkeop-5.15 | 5.15.0-1025.30~20.04.1 | USN-6311-1 |
| Ubuntu 20.04 LTS | linux-hwe-5.15 | 5.15.0-79.86~20.04.2 | USN-6300-1 |
| Ubuntu 20.04 LTS | linux-ibm-5.15 | 5.15.0-1036.39~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-intel-iotg-5.15 | 5.15.0-1037.42~20.04.1 | USN-6300-1 |
| Ubuntu 20.04 LTS | linux-lowlatency-hwe-5.15 | 5.15.0-79.88~20.04.1 | USN-6300-1 |
| Ubuntu 20.04 LTS | linux-nvidia-tegra-5.15 | 5.15.0-1016.16~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-oracle-5.15 | 5.15.0-1040.46~20.04.1 | USN-6300-1 |
| Ubuntu 20.04 LTS | linux-riscv +23 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-riscv-5.15 | 5.15.0-1038.42~20.04.2 | — |
| Ubuntu 18.04 LTS | linux-gcp +13 | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
| Ubuntu Pro Realtime 22.04 LTS | linux-intel-iot-realtime | 5.15.0-1036.38 | — |
| Ubuntu Pro Realtime 22.04 LTS | linux-realtime | 5.15.0-1043.48 | — |
| Ubuntu Pro FIPS-preview 22.04 LTS | linux-fips | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | bpftool | 7.0.0-284.18.1.el9_2 | RHSA-2023:3723 |
| RHEL 9 | kernel-rt +14 | 5.14.0-284.18.1.rt14.303.el9_2 | RHSA-2023:3708 |
| RHEL 9 | kpatch-patch-5_14_0-284_11_1 | 1-1.el9_2 | RHSA-2023:3705 |
| RHEL 9 | perf +48 | 5.14.0-284.18.1.el9_2 | RHSA-2023:3723 |
| RHEL 8 | kernel-rt +12 | 4.18.0-477.21.1.rt7.284.el8_8 | RHSA-2023:4541 |
| RHEL 8 | perf +26 | 4.18.0-477.21.1.el8_8 | RHSA-2023:4517 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhev Hypervisor 4 | perf +2 | 4.18.0-372.75.1.el8_6 | RHSA-2023:5627 |
| RHEL 9.0 EUS | kernel-rt +12 | 5.14.0-70.64.1.rt21.135.el9_0 | RHSA-2023:4138 |
| RHEL 9.0 EUS | perf +29 | 5.14.0-70.64.1.el9_0 | RHSA-2023:4137 |
| RHEL 8.6 EUS | perf +26 | 4.18.0-372.75.1.el8_6 | RHSA-2023:5627 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | bpftool | 7.0.0-284.18.1.el9_2 | ALSA-2023:3723 |
| AlmaLinux 9 | kernel-rt +13 | 5.14.0-284.18.1.rt14.303.el9_2 | ALSA-2023:3708 |
| AlmaLinux 9 | perf +43 | 5.14.0-284.18.1.el9_2 | ALSA-2023:3723 |
| AlmaLinux 8 | kernel-rt +11 | 4.18.0-477.21.1.rt7.284.el8_8 | ALSA-2023:4541 |
| AlmaLinux 8 | perf +23 | 4.18.0-477.21.1.el8_8 | ALSA-2023:4517 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | kernel | 4.18.0-477.21.1.el8_8 | RLSA-2023:4517 |
| Rocky Linux 8 | kernel-rt | 4.18.0-477.21.1.rt7.284.el8_8 | RLSA-2023:4541 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP5 | kernel-64kb +6 | 5.14.21-150500.55.7.1 | SUSE-SU-2023:2871-1 |
| SLES 15 SP5 | kernel-azure +2 | 5.14.21-150500.33.3.1 | SUSE-SU-2023:2646-1 |
| SLES 15 SP5 | kernel-default-base | 5.14.21-150500.55.7.1.150500.6.2.5 | SUSE-SU-2023:2871-1 |
| SLES 15 SP4 | kernel-64kb +6 | 5.14.21-150400.24.63.1 | SUSE-SU-2023:2140-1 |
| SLES 15 SP4 | kernel-azure +2 | 5.14.21-150400.14.49.1 | SUSE-SU-2023:2141-1 |
| SLES 15 SP4 | kernel-default-base | 5.14.21-150400.24.63.1.150400.24.27.1 | SUSE-SU-2023:2140-1 |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLE Micro 5.4 | kernel-default | 5.14.21-150400.24.63.1 | SUSE-SU-2023:2140-1 |
| SLE Micro 5.4 | kernel-default-base | 5.14.21-150400.24.63.1.150400.24.27.1 | SUSE-SU-2023:2140-1 |
| SLE Micro 5.4 | kernel-rt | 5.14.21-150400.15.28.2 | SUSE-SU-2023:2231-1 |
| SLE Micro 5.3 | kernel-default | 5.14.21-150400.24.63.1 | SUSE-SU-2023:2140-1 |
| SLE Micro 5.3 | kernel-default-base | 5.14.21-150400.24.63.1.150400.24.27.1 | SUSE-SU-2023:2140-1 |
| SLE Micro 5.3 | kernel-rt | 5.14.21-150400.15.28.2 | SUSE-SU-2023:2231-1 |
| SLE Live Patching 15 SP5 | kernel-default | 5.14.21-150500.55.7.1 | SUSE-SU-2023:2871-1 |
| SLE Live Patching 15 SP5 | kernel-livepatch-SLE15-SP5-RT_Update_1 | 1-150500.11.5.1 | SUSE-SU-2023:2809-1 |
| SLE Live Patching 15 SP5 | kernel-livepatch-SLE15-SP5_Update_0 +1 | 2-150500.3.1 | SUSE-SU-2023:3153-1, SUSE-SU-2023:3116-1 |
| SLE Live Patching 15 SP5 | kernel-livepatch-SLE15-SP5_Update_1 | 1-150500.11.7.1 | SUSE-SU-2023:2871-1 |
| SLE Live Patching 15 SP4 | kernel-default | 5.14.21-150400.24.63.1 | SUSE-SU-2023:2140-1 |
| SLE Live Patching 15 SP4 | kernel-livepatch-SLE15-SP4-RT_Update_7 | 1-150400.1.5.2 | SUSE-SU-2023:2231-1 |
| SLE Live Patching 15 SP4 | kernel-livepatch-SLE15-SP4_Update_10 | 5-150400.2.1 | SUSE-SU-2023:3055-1 |
| SLE Live Patching 15 SP4 | kernel-livepatch-SLE15-SP4_Update_12 | 1-150400.9.3.1 | SUSE-SU-2023:2140-1 |
| SLE Live Patching 15 SP4 | kernel-livepatch-SLE15-SP4_Update_2 | 13-150400.2.2 | SUSE-SU-2023:3079-1 |
| SLE Live Patching 15 SP4 | kernel-livepatch-SLE15-SP4_Update_3 | 12-150400.2.2 | SUSE-SU-2023:3063-1 |
| SUSE Real Time Module 15 SP5 | kernel-rt +3 | 5.14.21-150500.13.5.1 | SUSE-SU-2023:2809-1 |
| SUSE Real Time Module 15 SP4 | kernel-rt +1 | 5.14.21-150400.15.28.2 | SUSE-SU-2023:2231-1 |
| SUSE Real Time Module 15 SP4 | kernel-syms-rt +1 | 5.14.21-150400.15.28.1 | SUSE-SU-2023:2231-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.5 | dtb-aarch64 +10 | 5.14.21-150500.55.7.1 | SUSE-SU-2023:2871-1 |
| openSUSE Leap 15.5 | kernel-azure +2 | 5.14.21-150500.33.3.1 | SUSE-SU-2023:2646-1 |
| openSUSE Leap 15.5 | kernel-default-base | 5.14.21-150500.55.7.1.150500.6.2.5 | SUSE-SU-2023:2871-1 |
| openSUSE Leap 15.5 | kernel-rt +3 | 5.14.21-150500.13.5.1 | SUSE-SU-2023:2809-1 |
| openSUSE Leap 15.4 | dtb-aarch64 +10 | 5.14.21-150400.24.63.1 | SUSE-SU-2023:2140-1 |
| openSUSE Leap 15.4 | kernel-azure +2 | 5.14.21-150400.14.49.1 | SUSE-SU-2023:2141-1 |
| openSUSE Leap 15.4 | kernel-default-base | 5.14.21-150400.24.63.1.150400.24.27.1 | SUSE-SU-2023:2140-1 |
| openSUSE Leap 15.4 | kernel-rt +1 | 5.14.21-150400.15.28.2 | SUSE-SU-2023:2231-1 |
| openSUSE Leap 15.4 | kernel-syms-rt +1 | 5.14.21-150400.15.28.1 | SUSE-SU-2023:2231-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap Micro 5.3 | kernel-default | 5.14.21-150400.24.63.1 | SUSE-SU-2023:2140-1 |
| openSUSE Leap Micro 5.3 | kernel-default-base | 5.14.21-150400.24.63.1.150400.24.27.1 | SUSE-SU-2023:2140-1 |
| openSUSE Leap Micro 5.3 | kernel-rt | 5.14.21-150400.15.28.2 | SUSE-SU-2023:2231-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | kernel-livepatch-6.1.21-1.45 | 1.0-0.amzn2023 | ALAS2023-2023-148 |
| Amazon Linux 2023 | perf +12 | 6.1.21-1.45.amzn2023 | ALAS2023-2023-148 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 2 (CBL-Mariner) | kernel | 5.15.111.1-1 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | bpftool | 7.0.0-284.18.1.el9_2 | ELSA-2023-3723 |
| Oracle Linux 9 | perf +25 | 5.14.0-284.18.1.el9_2 | ELSA-2023-3723 |
| Oracle Linux 8 | perf +19 | 4.18.0-477.21.1.el8_8 | ELSA-2023-4517 |
Advisories 35
- ALSA-2023:3723 Important: kernel security and bug fix update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2023:3708 Important: kernel-rt security and bug fix update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2023:4541 Important: kernel-rt security and bug fix update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2023:4517 Important: kernel security and bug fix update AlmaLinux Security Advisories · Oct 29, 2026
- USN-6385-1 linux-oem-6.0 vulnerabilities Ubuntu Security Notices (USN) · Oct 23, 2026
- USN-6300-1 linux, linux-aws, linux-aws-5.15, linux-gcp, linux-hwe-5.15, linux-ibm, linux-intel-iotg, linux-intel-iotg-5.15, linux-kvm, linux-lowlatency, linux-lowlatency-hwe-5.15, linux-nvidia, linux-oracle, linux-oracle-5.15, linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Oct 22, 2026
- USN-6311-1 linux-gcp-5.15, linux-gke, linux-gke-5.15, linux-gkeop, linux-gkeop-5.15 vulnerabilities Ubuntu Security Notices (USN) · Oct 22, 2026
- USN-6332-1 linux-azure, linux-azure-5.15, linux-azure-fde vulnerabilities Ubuntu Security Notices (USN) · Oct 22, 2026
- RHSA-2023:5627 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2023:4541 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2023:4517 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2023:4138 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2023:4137 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2023:3708 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Sep 30, 2026
- RHSA-2023:3723 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Sep 30, 2026
- RHSA-2023:3705 Red Hat Security Advisory: kpatch-patch security update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- USN-6347-1 linux-azure-fde-5.15 vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- RLSA-2023:4541 Important: kernel-rt security and bug fix update Rocky Linux Security Advisories · Feb 5, 2026
- RLSA-2023:4517 Important: kernel security and bug fix update Rocky Linux Security Advisories · Feb 4, 2026
- SUSE-SU-2023:3055-1 Security update for the Linux Kernel (Live Patch 10 for SLE 15 SP4) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:2141-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:2646-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:3079-1 Security update for the Linux Kernel (Live Patch 2 for SLE 15 SP4) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:2871-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:3116-1 Security update for the Linux Kernel (Live Patch 0 for SLE 15 SP5) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:2231-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:2140-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:2809-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:3063-1 Security update for the Linux Kernel (Live Patch 3 for SLE 15 SP4) SUSE / openSUSE Security Updates · Feb 4, 2026
- ALAS2023-2023-148 Important: kernel security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Sep 22, 2025
- SUSE-SU-2023:3153-1 Security update for the Linux Kernel RT (Live Patch 0 for SLE 15 SP5) SUSE / openSUSE Security Updates · May 2, 2025
- WID-SEC-2024-0064 Juniper Produkte: Mehrere Schwachstellen BSI CERT-Bund (WID) · Apr 10, 2025
- WID-SEC-2023-1118 Linux Kernel: Mehrere Schwachstellen ermöglichen Privilegieneskalation BSI CERT-Bund (WID) · Mar 20, 2024
- ELSA-2023-4517 Important: kernel security and bug fix update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Aug 10, 2023
- ELSA-2023-3723 Important: kernel security and bug fix update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jul 25, 2023