🛡️ CVE-2023-4569 on Ubuntu — linux
Description
A memory leak flaw was found in nft_set_catchall_flush in net/netfilter/nf_tables_api.c in the Linux Kernel. This issue may allow a local attacker to cause double-deactivations of catchall elements, which can result in a memory leak.
Distribution advisory
This page covers CVE-2023-4569 as tracked by Ubuntu, for the package linux. The fix is available in version 5.15.0-84.93; earlier versions remain affected.
How this vulnerability can be exploited
This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.
CVSS metrics in full
The score comes from this vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Attack vector: Local — a local account, shell or session on the host is needed.
- Attack complexity: Low — the attack works reliably, with no preparation.
- Privileges required: Low — an ordinary user account is enough.
- User interaction: None — nobody has to be tricked into anything.
- Scope: Unchanged — the damage stays inside the vulnerable component.
- Confidentiality impact: None.
- Integrity impact: None.
- Availability impact: High — total loss, or loss the attacker controls.
Weakness class
UBUNTU-CVE-2023-4569 is classified as CWE-402: Transmission of Private Resources into a New Sphere ('Resource Leak'). The product makes resources available to untrusted parties when those resources are only intended to be accessed by the product.
Affected software
UBUNTU-CVE-2023-4569 is recorded against 89 packages.
- linux (fixed in 5.15.0-84.93)
- linux-allwinner-5.19
- linux-aws (fixed in 5.15.0-1045.50)
- linux-aws-5.0
- linux-aws-5.11
- linux-aws-5.13
- linux-aws-5.15 (fixed in 5.15.0-1045.50~20.04.1)
- linux-aws-5.19
- linux-aws-5.3
- linux-aws-5.8
- linux-aws-6.2 (fixed in 6.2.0-1012.12~22.04.1)
- linux-azure (fixed in 5.15.0-1047.54)
- linux-azure-5.11
- linux-azure-5.13
- linux-azure-5.15 (fixed in 5.15.0-1047.54~20.04.1)
- linux-azure-5.19
- linux-azure-5.3
- linux-azure-5.8
- linux-azure-6.2 (fixed in 6.2.0-1012.12~22.04.1)
- linux-azure-edge
- linux-azure-fde (fixed in 5.15.0-1047.54.1)
- linux-azure-fde-5.19
- linux-bluefield
- linux-fips
Show the remaining 65 packages
- linux-gcp (fixed in 5.15.0-1042.50)
- linux-gcp-5.11
- linux-gcp-5.13
- linux-gcp-5.15 (fixed in 5.15.0-1042.50~20.04.1)
- linux-gcp-5.19
- linux-gcp-5.3
- linux-gcp-5.8
- linux-gcp-6.2 (fixed in 6.2.0-1014.14~22.04.1)
- linux-gke (fixed in 5.15.0-1042.47)
- linux-gke-4.15
- linux-gke-5.15
- linux-gke-5.4
- linux-gkeop (fixed in 5.15.0-1028.33)
- linux-gkeop-5.15 (fixed in 5.15.0-1028.33~20.04.1)
- linux-gkeop-5.4
- linux-hwe
- linux-hwe-5.11
- linux-hwe-5.13
- linux-hwe-5.15 (fixed in 5.15.0-84.93~20.04.1)
- linux-hwe-5.19
- linux-hwe-5.8
- linux-hwe-6.2 (fixed in 6.2.0-33.33~22.04.1)
- linux-hwe-edge
- linux-ibm (fixed in 5.15.0-1038.41)
- linux-ibm-5.15 (fixed in 5.15.0-1038.41~20.04.1)
- linux-intel-5.13
- linux-intel-iot-realtime (fixed in 5.15.0-1039.41)
- linux-intel-iotg (fixed in 5.15.0-1040.46)
- linux-intel-iotg-5.15 (fixed in 5.15.0-1040.46~20.04.1)
- linux-kvm (fixed in 5.15.0-1042.47)
- linux-lowlatency (fixed in 5.15.0-84.93)
- linux-lowlatency-hwe-5.15 (fixed in 5.15.0-84.93~20.04.1)
- linux-lowlatency-hwe-5.19
- linux-lowlatency-hwe-6.2 (fixed in 6.2.0-1013.13~22.04.1)
- linux-nvidia (fixed in 5.15.0-1033.33)
- linux-nvidia-6.2 (fixed in 6.2.0-1011.11)
- linux-nvidia-tegra (fixed in 5.15.0-1018.18)
- linux-nvidia-tegra-5.15 (fixed in 5.15.0-1018.18~20.04.1)
- linux-nvidia-tegra-igx (fixed in 5.15.0-1005.5)
- linux-oem
- linux-oem-5.10
- linux-oem-5.13
- linux-oem-5.14
- linux-oem-5.17
- linux-oem-5.6
- linux-oem-6.0 (fixed in 6.0.0-1021.21)
- linux-oem-6.1 (fixed in 6.1.0-1022.22)
- linux-oracle (fixed in 5.15.0-1044.50)
- linux-oracle-5.0
- linux-oracle-5.11
- linux-oracle-5.13
- linux-oracle-5.15 (fixed in 5.15.0-1044.50~20.04.1)
- linux-oracle-5.3
- linux-oracle-5.8
- linux-raspi (fixed in 5.15.0-1038.41)
- linux-raspi-realtime
- linux-raspi2
- linux-realtime (fixed in 5.15.0-1046.52)
- linux-riscv
- linux-riscv-5.11
- linux-riscv-5.15 (fixed in 5.15.0-1041.45~20.04.1)
- linux-riscv-5.19
- linux-riscv-5.8
- linux-starfive-5.19
- linux-xilinx-zynqmp (fixed in 5.15.0-1025.29)
Timeline and source
Published on 28 August 2023 and last revised on 17 August 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.
References
ubuntu.com (Report)
patchwork.ozlabs.org (Report)
access.redhat.com (Report)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
www.cve.org (Report)
Other advisories for this package
linux has other advisories on record. If you are patching this one, these are worth checking on the same host:
- DEBIAN-CVE-2022-4994 (published 30 Jul 2026)
- CVE-2026-35233 (4.4 Medium, published 1 May 2026)
- CVE-2026-21996 (3.3 Low, published 1 May 2026)
- CVE-2026-21991 (5.5 Medium, published 16 Mar 2026)
- CGA-mcwh-q4vm-9f29 (published 29 Jan 2026)
- CGA-w6xv-3fg4-grm5 (published 29 Jan 2026)
- CGA-8vhr-fq3f-qx7q (published 7 Jan 2026)
- CGA-p49v-mx3v-9ff2 (published 7 Jan 2026)
Same weakness in other software
These advisories are the same class of weakness (CWE-402: Transmission of Private Resources into a New Sphere ('Resource Leak')) in other software:
- CVE-2025-48383 (8.2 High, published 7 Jul 2026)
- CVE-2025-67745 (7.1 High, published 18 Dec 2025)
- CVE-2024-32388 (5.3 Medium, published 1 Dec 2025)
- CVE-2025-66422 (4.3 Medium, published 30 Nov 2025)
- CVE-2025-55014 (4.7 Medium, published 4 Aug 2025)
- CVE-2025-49618 (5.8 Medium, published 3 Jul 2025)
- CVE-2025-52925 (5.0 Medium, published 2 Jul 2025)
- CVE-2025-32360 (4.2 Medium, published 5 Apr 2025)
CVE-2023-4569 on other distributions
Each distribution ships its own build and its own fixed version. Pick the one you run:
Details
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| linux | — | 5.15.0-84.93 |
| linux-allwinner-5.19 | — | — |
| linux-aws | — | 5.15.0-1045.50 |
| linux-aws-5.0 | — | — |
| linux-aws-5.11 | — | — |
| linux-aws-5.13 | — | — |
| linux-aws-5.15 | — | 5.15.0-1045.50~20.04.1 |
| linux-aws-5.19 | — | — |
| linux-aws-5.3 | — | — |
| linux-aws-5.8 | — | — |
| linux-aws-6.2 | — | 6.2.0-1012.12~22.04.1 |
| linux-azure | — | 5.15.0-1047.54 |
| linux-azure-5.11 | — | — |
| linux-azure-5.13 | — | — |
| linux-azure-5.15 | — | 5.15.0-1047.54~20.04.1 |
| linux-azure-5.19 | — | — |
| linux-azure-5.3 | — | — |
| linux-azure-5.8 | — | — |
| linux-azure-6.2 | — | 6.2.0-1012.12~22.04.1 |
| linux-azure-edge | — | — |
| linux-azure-fde | — | 5.15.0-1047.54.1 |
| linux-azure-fde-5.19 | — | — |
| linux-bluefield | — | — |
| linux-fips | — | — |
| linux-gcp | — | 5.15.0-1042.50 |
| linux-gcp-5.11 | — | — |
| linux-gcp-5.13 | — | — |
| linux-gcp-5.15 | — | 5.15.0-1042.50~20.04.1 |
| linux-gcp-5.19 | — | — |
| linux-gcp-5.3 | — | — |
| linux-gcp-5.8 | — | — |
| linux-gcp-6.2 | — | 6.2.0-1014.14~22.04.1 |
| linux-gke | — | 5.15.0-1042.47 |
| linux-gke-4.15 | — | — |
| linux-gke-5.15 | — | — |
| linux-gke-5.4 | — | — |
| linux-gkeop | — | 5.15.0-1028.33 |
| linux-gkeop-5.15 | — | 5.15.0-1028.33~20.04.1 |
| linux-gkeop-5.4 | — | — |
| linux-hwe | — | — |
| linux-hwe-5.11 | — | — |
| linux-hwe-5.13 | — | — |
| linux-hwe-5.15 | — | 5.15.0-84.93~20.04.1 |
| linux-hwe-5.19 | — | — |
| linux-hwe-5.8 | — | — |
| linux-hwe-6.2 | — | 6.2.0-33.33~22.04.1 |
| linux-hwe-edge | — | — |
| linux-ibm | — | 5.15.0-1038.41 |
| linux-ibm-5.15 | — | 5.15.0-1038.41~20.04.1 |
| linux-intel-5.13 | — | — |
| linux-intel-iot-realtime | — | 5.15.0-1039.41 |
| linux-intel-iotg | — | 5.15.0-1040.46 |
| linux-intel-iotg-5.15 | — | 5.15.0-1040.46~20.04.1 |
| linux-kvm | — | 5.15.0-1042.47 |
| linux-lowlatency | — | 5.15.0-84.93 |
| linux-lowlatency-hwe-5.15 | — | 5.15.0-84.93~20.04.1 |
| linux-lowlatency-hwe-5.19 | — | — |
| linux-lowlatency-hwe-6.2 | — | 6.2.0-1013.13~22.04.1 |
| linux-nvidia | — | 5.15.0-1033.33 |
| linux-nvidia-6.2 | — | 6.2.0-1011.11 |
| linux-nvidia-tegra | — | 5.15.0-1018.18 |
| linux-nvidia-tegra-5.15 | — | 5.15.0-1018.18~20.04.1 |
| linux-nvidia-tegra-igx | — | 5.15.0-1005.5 |
| linux-oem | — | — |
| linux-oem-5.10 | — | — |
| linux-oem-5.13 | — | — |
| linux-oem-5.14 | — | — |
| linux-oem-5.17 | — | — |
| linux-oem-5.6 | — | — |
| linux-oem-6.0 | — | 6.0.0-1021.21 |
| linux-oem-6.1 | — | 6.1.0-1022.22 |
| linux-oracle | — | 5.15.0-1044.50 |
| linux-oracle-5.0 | — | — |
| linux-oracle-5.11 | — | — |
| linux-oracle-5.13 | — | — |
| linux-oracle-5.15 | — | 5.15.0-1044.50~20.04.1 |
| linux-oracle-5.3 | — | — |
| linux-oracle-5.8 | — | — |
| linux-raspi | — | 5.15.0-1038.41 |
| linux-raspi-realtime | — | — |
| linux-raspi2 | — | — |
| linux-realtime | — | 5.15.0-1046.52 |
| linux-riscv | — | — |
| linux-riscv-5.11 | — | — |
| linux-riscv-5.15 | — | 5.15.0-1041.45~20.04.1 |
| linux-riscv-5.19 | — | — |
| linux-riscv-5.8 | — | — |
| linux-starfive-5.19 | — | — |
| linux-xilinx-zynqmp | — | 5.15.0-1025.29 |
References
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