Vulnerability · Published May 8, 2023 · Assigned by mitre
CVE-2023-32233
High 7.8
In plain English
A high-severity use-after-free in the bpftool package (AlmaLinux). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 13.4% (higher than 96% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.8High
Exploit odds (30 days)13.4%top 3.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack tooling1Public PoC
Official description
In the Linux kernel through 6.3.1, a use-after-free in Netfilter nf_tables when processing batch requests can be abused to perform arbitrary read and write operations on kernel memory. Unprivileged local users can obtain root privileges. This occurs because anonymous sets are mishandled.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | bpftool | 4.18.0-477.13.1.el8_8 | ALSA-2023:3349 |
| AlmaLinux:9 | bpftool | 7.0.0-284.18.1.el9_2 | ALSA-2023:3723 |
| AlmaLinux:8 | kernel | 4.18.0-477.13.1.el8_8 | ALSA-2023:3349 |
| AlmaLinux:9 | kernel | 5.14.0-284.18.1.el9_2 | ALSA-2023:3723 |
| AlmaLinux:9 | kernel-64k | 5.14.0-284.18.1.el9_2 | ALSA-2023:3723 |
| AlmaLinux:9 | kernel-64k-core | 5.14.0-284.18.1.el9_2 | ALSA-2023:3723 |
| AlmaLinux:9 | kernel-64k-debug | 5.14.0-284.18.1.el9_2 | ALSA-2023:3723 |
| AlmaLinux:9 | kernel-64k-debug-core | 5.14.0-284.18.1.el9_2 | ALSA-2023:3723 |
| AlmaLinux:9 | kernel-64k-debug-devel | 5.14.0-284.18.1.el9_2 | ALSA-2023:3723 |
| AlmaLinux:9 | kernel-64k-debug-devel-matched | 5.14.0-284.18.1.el9_2 | ALSA-2023:3723 |
| AlmaLinux:9 | kernel-64k-debug-modules | 5.14.0-284.18.1.el9_2 | ALSA-2023:3723 |
| AlmaLinux:9 | kernel-64k-debug-modules-core | 5.14.0-284.18.1.el9_2 | ALSA-2023:3723 |
| AlmaLinux:9 | kernel-64k-debug-modules-extra | 5.14.0-284.18.1.el9_2 | ALSA-2023:3723 |
| AlmaLinux:9 | kernel-64k-devel | 5.14.0-284.18.1.el9_2 | ALSA-2023:3723 |
| AlmaLinux:9 | kernel-64k-devel-matched | 5.14.0-284.18.1.el9_2 | ALSA-2023:3723 |
| AlmaLinux:9 | kernel-64k-modules | 5.14.0-284.18.1.el9_2 | ALSA-2023:3723 |
| AlmaLinux:9 | kernel-64k-modules-core | 5.14.0-284.18.1.el9_2 | ALSA-2023:3723 |
| AlmaLinux:9 | kernel-64k-modules-extra | 5.14.0-284.18.1.el9_2 | ALSA-2023:3723 |
| AlmaLinux:8 | kernel-abi-stablelists | 4.18.0-477.13.1.el8_8 | ALSA-2023:3349 |
| AlmaLinux:9 | kernel-abi-stablelists | 5.14.0-284.18.1.el9_2 | ALSA-2023:3723 |
| AlmaLinux:8 | kernel-core | 4.18.0-477.13.1.el8_8 | ALSA-2023:3349 |
| AlmaLinux:9 | kernel-core | 5.14.0-284.18.1.el9_2 | ALSA-2023:3723 |
| AlmaLinux:8 | kernel-cross-headers | 4.18.0-477.13.1.el8_8 | ALSA-2023:3349 |
| AlmaLinux:8 | kernel-debug | 4.18.0-477.13.1.el8_8 | ALSA-2023:3349 |
| AlmaLinux:9 | kernel-debug | 5.14.0-284.18.1.el9_2 | ALSA-2023:3723 |
| AlmaLinux:8 | kernel-debug-core | 4.18.0-477.13.1.el8_8 | ALSA-2023:3349 |
| AlmaLinux:9 | kernel-debug-core | 5.14.0-284.18.1.el9_2 | ALSA-2023:3723 |
| AlmaLinux:8 | kernel-debug-devel | 4.18.0-477.13.1.el8_8 | ALSA-2023:3349 |
| AlmaLinux:9 | kernel-debug-devel | 5.14.0-284.18.1.el9_2 | ALSA-2023:3723 |
| AlmaLinux:9 | kernel-debug-devel-matched | 5.14.0-284.18.1.el9_2 | ALSA-2023:3723 |
| AlmaLinux:8 | kernel-debug-modules | 4.18.0-477.13.1.el8_8 | ALSA-2023:3349 |
| AlmaLinux:9 | kernel-debug-modules | 5.14.0-284.18.1.el9_2 | ALSA-2023:3723 |
| AlmaLinux:9 | kernel-debug-modules-core | 5.14.0-284.18.1.el9_2 | ALSA-2023:3723 |
| AlmaLinux:8 | kernel-debug-modules-extra | 4.18.0-477.13.1.el8_8 | ALSA-2023:3349 |
| AlmaLinux:9 | kernel-debug-modules-extra | 5.14.0-284.18.1.el9_2 | ALSA-2023:3723 |
| AlmaLinux:9 | kernel-debug-uki-virt | 5.14.0-284.18.1.el9_2 | ALSA-2023:3723 |
| AlmaLinux:8 | kernel-devel | 4.18.0-477.13.1.el8_8 | ALSA-2023:3349 |
| AlmaLinux:9 | kernel-devel | 5.14.0-284.18.1.el9_2 | ALSA-2023:3723 |
| AlmaLinux:9 | kernel-devel-matched | 5.14.0-284.18.1.el9_2 | ALSA-2023:3723 |
| AlmaLinux:8 | kernel-doc | 4.18.0-477.13.1.el8_8 | ALSA-2023:3349 |
| AlmaLinux:8 | kernel-modules | 4.18.0-477.13.1.el8_8 | ALSA-2023:3349 |
| AlmaLinux:9 | kernel-modules | 5.14.0-284.18.1.el9_2 | ALSA-2023:3723 |
| AlmaLinux:9 | kernel-modules-core | 5.14.0-284.18.1.el9_2 | ALSA-2023:3723 |
| AlmaLinux:8 | kernel-modules-extra | 4.18.0-477.13.1.el8_8 | ALSA-2023:3349 |
| AlmaLinux:9 | kernel-modules-extra | 5.14.0-284.18.1.el9_2 | ALSA-2023:3723 |
| AlmaLinux:8 | kernel-rt | 4.18.0-477.13.1.rt7.276.el8_8 | ALSA-2023:3350 |
| AlmaLinux:9 | kernel-rt | 5.14.0-284.18.1.rt14.303.el9_2 | ALSA-2023:3708 |
| AlmaLinux:8 | kernel-rt-core | 4.18.0-477.13.1.rt7.276.el8_8 | ALSA-2023:3350 |
| AlmaLinux:9 | kernel-rt-core | 5.14.0-284.18.1.rt14.303.el9_2 | ALSA-2023:3708 |
| AlmaLinux:8 | kernel-rt-debug | 4.18.0-477.13.1.rt7.276.el8_8 | ALSA-2023:3350 |
| AlmaLinux:9 | kernel-rt-debug | 5.14.0-284.18.1.rt14.303.el9_2 | ALSA-2023:3708 |
| AlmaLinux:8 | kernel-rt-debug-core | 4.18.0-477.13.1.rt7.276.el8_8 | ALSA-2023:3350 |
| AlmaLinux:9 | kernel-rt-debug-core | 5.14.0-284.18.1.rt14.303.el9_2 | ALSA-2023:3708 |
| AlmaLinux:8 | kernel-rt-debug-devel | 4.18.0-477.13.1.rt7.276.el8_8 | ALSA-2023:3350 |
| AlmaLinux:9 | kernel-rt-debug-devel | 5.14.0-284.18.1.rt14.303.el9_2 | ALSA-2023:3708 |
| AlmaLinux:8 | kernel-rt-debug-kvm | 4.18.0-477.13.1.rt7.276.el8_8 | ALSA-2023:3350 |
| AlmaLinux:9 | kernel-rt-debug-kvm | 5.14.0-284.18.1.rt14.303.el9_2 | ALSA-2023:3708 |
| AlmaLinux:8 | kernel-rt-debug-modules | 4.18.0-477.13.1.rt7.276.el8_8 | ALSA-2023:3350 |
| AlmaLinux:9 | kernel-rt-debug-modules | 5.14.0-284.18.1.rt14.303.el9_2 | ALSA-2023:3708 |
| AlmaLinux:9 | kernel-rt-debug-modules-core | 5.14.0-284.18.1.rt14.303.el9_2 | ALSA-2023:3708 |
| AlmaLinux:8 | kernel-rt-debug-modules-extra | 4.18.0-477.13.1.rt7.276.el8_8 | ALSA-2023:3350 |
| AlmaLinux:9 | kernel-rt-debug-modules-extra | 5.14.0-284.18.1.rt14.303.el9_2 | ALSA-2023:3708 |
| AlmaLinux:8 | kernel-rt-devel | 4.18.0-477.13.1.rt7.276.el8_8 | ALSA-2023:3350 |
| AlmaLinux:9 | kernel-rt-devel | 5.14.0-284.18.1.rt14.303.el9_2 | ALSA-2023:3708 |
| AlmaLinux:8 | kernel-rt-kvm | 4.18.0-477.13.1.rt7.276.el8_8 | ALSA-2023:3350 |
| AlmaLinux:9 | kernel-rt-kvm | 5.14.0-284.18.1.rt14.303.el9_2 | ALSA-2023:3708 |
| AlmaLinux:8 | kernel-rt-modules | 4.18.0-477.13.1.rt7.276.el8_8 | ALSA-2023:3350 |
| AlmaLinux:9 | kernel-rt-modules | 5.14.0-284.18.1.rt14.303.el9_2 | ALSA-2023:3708 |
| AlmaLinux:9 | kernel-rt-modules-core | 5.14.0-284.18.1.rt14.303.el9_2 | ALSA-2023:3708 |
| AlmaLinux:8 | kernel-rt-modules-extra | 4.18.0-477.13.1.rt7.276.el8_8 | ALSA-2023:3350 |
| AlmaLinux:9 | kernel-rt-modules-extra | 5.14.0-284.18.1.rt14.303.el9_2 | ALSA-2023:3708 |
| AlmaLinux:8 | kernel-tools | 4.18.0-477.13.1.el8_8 | ALSA-2023:3349 |
| AlmaLinux:9 | kernel-tools | 5.14.0-284.18.1.el9_2 | ALSA-2023:3723 |
| AlmaLinux:8 | kernel-tools-libs | 4.18.0-477.13.1.el8_8 | ALSA-2023:3349 |
| AlmaLinux:9 | kernel-tools-libs | 5.14.0-284.18.1.el9_2 | ALSA-2023:3723 |
| AlmaLinux:8 | kernel-tools-libs-devel | 4.18.0-477.13.1.el8_8 | ALSA-2023:3349 |
| AlmaLinux:9 | kernel-tools-libs-devel | 5.14.0-284.18.1.el9_2 | ALSA-2023:3723 |
| AlmaLinux:9 | kernel-uki-virt | 5.14.0-284.18.1.el9_2 | ALSA-2023:3723 |
| AlmaLinux:8 | kernel-zfcpdump | 4.18.0-477.13.1.el8_8 | ALSA-2023:3349 |
| AlmaLinux:9 | kernel-zfcpdump | 5.14.0-284.18.1.el9_2 | ALSA-2023:3723 |
| AlmaLinux:8 | kernel-zfcpdump-core | 4.18.0-477.13.1.el8_8 | ALSA-2023:3349 |
| AlmaLinux:9 | kernel-zfcpdump-core | 5.14.0-284.18.1.el9_2 | ALSA-2023:3723 |
| AlmaLinux:8 | kernel-zfcpdump-devel | 4.18.0-477.13.1.el8_8 | ALSA-2023:3349 |
| AlmaLinux:9 | kernel-zfcpdump-devel | 5.14.0-284.18.1.el9_2 | ALSA-2023:3723 |
| AlmaLinux:9 | kernel-zfcpdump-devel-matched | 5.14.0-284.18.1.el9_2 | ALSA-2023:3723 |
| AlmaLinux:8 | kernel-zfcpdump-modules | 4.18.0-477.13.1.el8_8 | ALSA-2023:3349 |
| AlmaLinux:9 | kernel-zfcpdump-modules | 5.14.0-284.18.1.el9_2 | ALSA-2023:3723 |
| AlmaLinux:9 | kernel-zfcpdump-modules-core | 5.14.0-284.18.1.el9_2 | ALSA-2023:3723 |
| AlmaLinux:8 | kernel-zfcpdump-modules-extra | 4.18.0-477.13.1.el8_8 | ALSA-2023:3349 |
| AlmaLinux:9 | kernel-zfcpdump-modules-extra | 5.14.0-284.18.1.el9_2 | ALSA-2023:3723 |
| AlmaLinux:8 | perf | 4.18.0-477.13.1.el8_8 | ALSA-2023:3349 |
| AlmaLinux:9 | perf | 5.14.0-284.18.1.el9_2 | ALSA-2023:3723 |
| AlmaLinux:8 | python3-perf | 4.18.0-477.13.1.el8_8 | ALSA-2023:3349 |
| AlmaLinux:9 | python3-perf | 5.14.0-284.18.1.el9_2 | ALSA-2023:3723 |
| AlmaLinux:9 | rtla | 5.14.0-284.18.1.el9_2 | ALSA-2023:3723 |
| Alpine:v3.20 | linux-lts | 6.1.27-r3 | ALPINE-CVE-2023-32233 |
| Alpine:v3.21 | linux-lts | 6.1.27-r3 | ALPINE-CVE-2023-32233 |
| Alpine:v3.22 | linux-lts | 6.1.27-r3 | ALPINE-CVE-2023-32233 |
| Alpine:v3.23 | linux-lts | 6.1.27-r3 | ALPINE-CVE-2023-32233 |
| Debian:12 | linux | 6.1.27-1 | DEBIAN-CVE-2023-32233 |
| Debian:13 | linux | 6.1.27-1 | DEBIAN-CVE-2023-32233 |
| Debian:14 | linux | 6.1.27-1 | DEBIAN-CVE-2023-32233 |
| Rocky Linux:8 | kernel-rt | 0:4.18.0-477.13.1.rt7.276.el8_8 | RLSA-2023:3350 |
| Ubuntu:22.04:LTS | linux | 5.15.0-73.80 | UBUNTU-CVE-2023-32233 |
| Ubuntu:22.04:LTS | linux | 5.15.0-73.80 | USN-6127-1 |
| Ubuntu:22.04:LTS | linux-aws | 5.15.0-1037.41 | USN-6127-1 |
| Ubuntu:22.04:LTS | linux-aws | 5.15.0-1037.41 | UBUNTU-CVE-2023-32233 |
| Ubuntu:22.04:LTS | linux-azure | 5.15.0-1039.46 | UBUNTU-CVE-2023-32233 |
| Ubuntu:22.04:LTS | linux-azure | 5.15.0-1039.46 | USN-6127-1 |
| Ubuntu:22.04:LTS | linux-azure-5.19 | no fix listed | UBUNTU-CVE-2023-32233 |
| Ubuntu:22.04:LTS | linux-azure-fde | 5.15.0-1039.46.1 | USN-6135-1 |
| Ubuntu:22.04:LTS | linux-azure-fde | 5.15.0-1039.46.1 | UBUNTU-CVE-2023-32233 |
| Ubuntu:22.04:LTS | linux-gcp | 5.15.0-1035.43 | UBUNTU-CVE-2023-32233 |
| Ubuntu:22.04:LTS | linux-gcp | 5.15.0-1035.43 | USN-6127-1 |
| Ubuntu:22.04:LTS | linux-gke | 5.15.0-1034.39 | USN-6127-1 |
| Ubuntu:22.04:LTS | linux-gke | 5.15.0-1034.39 | UBUNTU-CVE-2023-32233 |
| Ubuntu:22.04:LTS | linux-gkeop | 5.15.0-1021.26 | USN-6127-1 |
| Ubuntu:22.04:LTS | linux-gkeop | 5.15.0-1021.26 | UBUNTU-CVE-2023-32233 |
| Ubuntu:22.04:LTS | linux-hwe-5.19 | 5.19.0-43.44~22.04.1 | UBUNTU-CVE-2023-32233 |
| Ubuntu:22.04:LTS | linux-hwe-5.19 | 5.19.0-43.44~22.04.1 | USN-6127-1 |
| Ubuntu:22.04:LTS | linux-ibm | 5.15.0-1031.34 | UBUNTU-CVE-2023-32233 |
| Ubuntu:22.04:LTS | linux-ibm | 5.15.0-1031.34 | USN-6127-1 |
| Ubuntu:22.04:LTS | linux-intel-iotg | 5.15.0-1031.36 | UBUNTU-CVE-2023-32233 |
| Ubuntu:22.04:LTS | linux-intel-iotg | 5.15.0-1031.36 | USN-6150-1 |
| Ubuntu:22.04:LTS | linux-kvm | 5.15.0-1034.39 | USN-6127-1 |
| Ubuntu:22.04:LTS | linux-kvm | 5.15.0-1034.39 | UBUNTU-CVE-2023-32233 |
| Ubuntu:22.04:LTS | linux-lowlatency | 5.15.0-73.80 | UBUNTU-CVE-2023-32233 |
| Ubuntu:22.04:LTS | linux-lowlatency | 5.15.0-73.80 | USN-6127-1 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-5.19 | 5.19.0-1025.26~22.04.1 | UBUNTU-CVE-2023-32233 |
| Ubuntu:22.04:LTS | linux-nvidia | 5.15.0-1026.26 | UBUNTU-CVE-2023-32233 |
| Ubuntu:22.04:LTS | linux-nvidia-tegra | 5.15.0-1014.14 | UBUNTU-CVE-2023-32233 |
| Ubuntu:22.04:LTS | linux-oem-5.17 | 5.17.0-1032.33 | UBUNTU-CVE-2023-32233 |
| Ubuntu:22.04:LTS | linux-oem-5.17 | 5.17.0-1032.33 | USN-6124-1 |
| Ubuntu:22.04:LTS | linux-oem-6.0 | 6.0.0-1017.17 | UBUNTU-CVE-2023-32233 |
| Ubuntu:22.04:LTS | linux-oem-6.0 | 6.0.0-1017.17 | USN-6123-1 |
| Ubuntu:22.04:LTS | linux-oem-6.1 | 6.1.0-1013.13 | USN-6122-1 |
| Ubuntu:22.04:LTS | linux-oem-6.1 | 6.1.0-1013.13 | UBUNTU-CVE-2023-32233 |
| Ubuntu:22.04:LTS | linux-oracle | 5.15.0-1036.42 | UBUNTU-CVE-2023-32233 |
| Ubuntu:22.04:LTS | linux-oracle | 5.15.0-1036.42 | USN-6127-1 |
| Ubuntu:22.04:LTS | linux-raspi | 5.15.0-1030.32 | UBUNTU-CVE-2023-32233 |
| Ubuntu:22.04:LTS | linux-raspi | 5.15.0-1030.32 | USN-6150-1 |
| Ubuntu:24.04:LTS | linux-raspi-realtime | no fix listed | UBUNTU-CVE-2023-32233 |
| Ubuntu:22.04:LTS | linux-realtime | no fix listed | UBUNTU-CVE-2023-32233 |
| Ubuntu:22.04:LTS | linux-riscv | no fix listed | UBUNTU-CVE-2023-32233 |
Affected products (as reported)
Weakness: CWE-416 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References
- https://www.openwall.com/lists/oss-security/2023/05/08/4
- https://github.com/torvalds/linux/commit/c1592a89942e9678f7d9c8030efa777c0d57edab
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c1592a89942e9678f7d9c8030efa777c0d57edab
- https://news.ycombinator.com/item?id=35879660
- https://bugzilla.redhat.com/show_bug.cgi?id=2196105
- DSA-5402 vendor-advisory
- [oss-security] 20230515 Re: [CVE-2023-32233] Linux kernel use-after-free in Netfilter nf_tables when processing batch requests can be abused to perform arbitrary reads and writes in kernel memory mailing-list
- [debian-lts-announce] 20230605 [SECURITY] [DLA 3446-1] linux-5.10 security update mailing-list
- https://security.netapp.com/advisory/ntap-20230616-0002/
- http://packetstormsecurity.com/files/173087/Kernel-Live-Patch-Security-Notice-LSN-0095-1.html
- [debian-lts-announce] 20230727 [SECURITY] [DLA 3508-1] linux security update mailing-list
- https://cert-portal.siemens.com/productcert/html/ssa-794697.html
- https://cert-portal.siemens.com/productcert/html/ssa-806742.html