Vulnerability · Published Jun 16, 2023 · Assigned by mitre
CVE-2023-35788
High 7.8
In plain English
A high-severity out-of-bounds write in the bpftool package (AlmaLinux). Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 45% 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)0.5%top 55.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack tooling1Public PoC
Official description
An issue was discovered in fl_set_geneve_opt in net/sched/cls_flower.c in the Linux kernel before 6.3.7. It allows an out-of-bounds write in the flower classifier code via TCA_FLOWER_KEY_ENC_OPTS_GENEVE packets. This may result in denial of service or privilege escalation.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | bpftool | 4.18.0-477.27.2.el8_8 | ALSA-2023:5244 |
| AlmaLinux:9 | bpftool | 7.0.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux:8 | kernel | 4.18.0-477.27.2.el8_8 | ALSA-2023:5244 |
| AlmaLinux:9 | kernel | 5.14.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux:9 | kernel-64k | 5.14.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux:9 | kernel-64k-core | 5.14.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux:9 | kernel-64k-debug | 5.14.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux:9 | kernel-64k-debug-core | 5.14.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux:9 | kernel-64k-debug-devel | 5.14.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux:9 | kernel-64k-debug-devel-matched | 5.14.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux:9 | kernel-64k-debug-modules | 5.14.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux:9 | kernel-64k-debug-modules-core | 5.14.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux:9 | kernel-64k-debug-modules-extra | 5.14.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux:9 | kernel-64k-devel | 5.14.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux:9 | kernel-64k-devel-matched | 5.14.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux:9 | kernel-64k-modules | 5.14.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux:9 | kernel-64k-modules-core | 5.14.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux:9 | kernel-64k-modules-extra | 5.14.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux:8 | kernel-abi-stablelists | 4.18.0-477.27.2.el8_8 | ALSA-2023:5244 |
| AlmaLinux:9 | kernel-abi-stablelists | 5.14.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux:8 | kernel-core | 4.18.0-477.27.2.el8_8 | ALSA-2023:5244 |
| AlmaLinux:9 | kernel-core | 5.14.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux:8 | kernel-cross-headers | 4.18.0-477.27.2.el8_8 | ALSA-2023:5244 |
| AlmaLinux:9 | kernel-cross-headers | 5.14.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux:8 | kernel-debug | 4.18.0-477.27.2.el8_8 | ALSA-2023:5244 |
| AlmaLinux:9 | kernel-debug | 5.14.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux:8 | kernel-debug-core | 4.18.0-477.27.2.el8_8 | ALSA-2023:5244 |
| AlmaLinux:9 | kernel-debug-core | 5.14.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux:8 | kernel-debug-devel | 4.18.0-477.27.2.el8_8 | ALSA-2023:5244 |
| AlmaLinux:9 | kernel-debug-devel | 5.14.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux:9 | kernel-debug-devel-matched | 5.14.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux:8 | kernel-debug-modules | 4.18.0-477.27.2.el8_8 | ALSA-2023:5244 |
| AlmaLinux:9 | kernel-debug-modules | 5.14.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux:9 | kernel-debug-modules-core | 5.14.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux:8 | kernel-debug-modules-extra | 4.18.0-477.27.2.el8_8 | ALSA-2023:5244 |
| AlmaLinux:9 | kernel-debug-modules-extra | 5.14.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux:9 | kernel-debug-uki-virt | 5.14.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux:8 | kernel-devel | 4.18.0-477.27.2.el8_8 | ALSA-2023:5244 |
| AlmaLinux:9 | kernel-devel | 5.14.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux:9 | kernel-devel-matched | 5.14.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux:8 | kernel-doc | 4.18.0-477.27.2.el8_8 | ALSA-2023:5244 |
| AlmaLinux:9 | kernel-doc | 5.14.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux:8 | kernel-headers | 4.18.0-477.27.2.el8_8 | ALSA-2023:5244 |
| AlmaLinux:8 | kernel-modules | 4.18.0-477.27.2.el8_8 | ALSA-2023:5244 |
| AlmaLinux:9 | kernel-modules | 5.14.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux:9 | kernel-modules-core | 5.14.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux:8 | kernel-modules-extra | 4.18.0-477.27.2.el8_8 | ALSA-2023:5244 |
| AlmaLinux:9 | kernel-modules-extra | 5.14.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux:9 | kernel-rt | 5.14.0-284.25.1.rt14.310.el9_2 | ALSA-2023:4378 |
| AlmaLinux:9 | kernel-rt-core | 5.14.0-284.25.1.rt14.310.el9_2 | ALSA-2023:4378 |
| AlmaLinux:9 | kernel-rt-debug | 5.14.0-284.25.1.rt14.310.el9_2 | ALSA-2023:4378 |
| AlmaLinux:9 | kernel-rt-debug-core | 5.14.0-284.25.1.rt14.310.el9_2 | ALSA-2023:4378 |
| AlmaLinux:9 | kernel-rt-debug-devel | 5.14.0-284.25.1.rt14.310.el9_2 | ALSA-2023:4378 |
| AlmaLinux:9 | kernel-rt-debug-kvm | 5.14.0-284.25.1.rt14.310.el9_2 | ALSA-2023:4378 |
| AlmaLinux:9 | kernel-rt-debug-modules | 5.14.0-284.25.1.rt14.310.el9_2 | ALSA-2023:4378 |
| AlmaLinux:9 | kernel-rt-debug-modules-core | 5.14.0-284.25.1.rt14.310.el9_2 | ALSA-2023:4378 |
| AlmaLinux:9 | kernel-rt-debug-modules-extra | 5.14.0-284.25.1.rt14.310.el9_2 | ALSA-2023:4378 |
| AlmaLinux:9 | kernel-rt-devel | 5.14.0-284.25.1.rt14.310.el9_2 | ALSA-2023:4378 |
| AlmaLinux:9 | kernel-rt-kvm | 5.14.0-284.25.1.rt14.310.el9_2 | ALSA-2023:4378 |
| AlmaLinux:9 | kernel-rt-modules | 5.14.0-284.25.1.rt14.310.el9_2 | ALSA-2023:4378 |
| AlmaLinux:9 | kernel-rt-modules-core | 5.14.0-284.25.1.rt14.310.el9_2 | ALSA-2023:4378 |
| AlmaLinux:9 | kernel-rt-modules-extra | 5.14.0-284.25.1.rt14.310.el9_2 | ALSA-2023:4378 |
| AlmaLinux:8 | kernel-tools | 4.18.0-477.27.2.el8_8 | ALSA-2023:5244 |
| AlmaLinux:9 | kernel-tools | 5.14.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux:8 | kernel-tools-libs | 4.18.0-477.27.2.el8_8 | ALSA-2023:5244 |
| AlmaLinux:9 | kernel-tools-libs | 5.14.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux:8 | kernel-tools-libs-devel | 4.18.0-477.27.2.el8_8 | ALSA-2023:5244 |
| AlmaLinux:9 | kernel-tools-libs-devel | 5.14.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux:9 | kernel-uki-virt | 5.14.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux:8 | kernel-zfcpdump | 4.18.0-477.27.2.el8_8 | ALSA-2023:5244 |
| AlmaLinux:9 | kernel-zfcpdump | 5.14.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux:8 | kernel-zfcpdump-core | 4.18.0-477.27.2.el8_8 | ALSA-2023:5244 |
| AlmaLinux:9 | kernel-zfcpdump-core | 5.14.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux:8 | kernel-zfcpdump-devel | 4.18.0-477.27.2.el8_8 | ALSA-2023:5244 |
| AlmaLinux:9 | kernel-zfcpdump-devel | 5.14.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux:9 | kernel-zfcpdump-devel-matched | 5.14.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux:8 | kernel-zfcpdump-modules | 4.18.0-477.27.2.el8_8 | ALSA-2023:5244 |
| AlmaLinux:9 | kernel-zfcpdump-modules | 5.14.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux:9 | kernel-zfcpdump-modules-core | 5.14.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux:8 | kernel-zfcpdump-modules-extra | 4.18.0-477.27.2.el8_8 | ALSA-2023:5244 |
| AlmaLinux:9 | kernel-zfcpdump-modules-extra | 5.14.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux:8 | perf | 4.18.0-477.27.2.el8_8 | ALSA-2023:5244 |
| AlmaLinux:9 | perf | 5.14.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux:8 | python3-perf | 4.18.0-477.27.2.el8_8 | ALSA-2023:5244 |
| AlmaLinux:9 | python3-perf | 5.14.0-284.25.1.el9_2 | ALSA-2023:4377 |
| AlmaLinux:9 | rtla | 5.14.0-284.25.1.el9_2 | ALSA-2023:4377 |
| Debian:12 | linux | 6.1.37-1 | DSA-5448-1 |
| Debian:12 | linux | 6.1.37-1 | DEBIAN-CVE-2023-35788 |
| Debian:13 | linux | 6.3.7-1 | DEBIAN-CVE-2023-35788 |
| Debian:14 | linux | 6.3.7-1 | DEBIAN-CVE-2023-35788 |
| Rocky Linux:8 | kernel | 0:4.18.0-477.27.1.el8_8.cloud | RXSA-2023:5244 |
| Rocky Linux:8 | kernel | 0:4.18.0-477.27.1.el8_8 | RLSA-2023:5244 |
| Rocky Linux:9 | kernel-rt | 0:5.14.0-284.25.1.rt14.310.el9_2 | RLSA-2023:4378 |
| Ubuntu:22.04:LTS | linux | 5.15.0-76.83 | UBUNTU-CVE-2023-35788 |
| Ubuntu:22.04:LTS | linux | 5.15.0-76.83 | USN-6193-1 |
| Ubuntu:22.04:LTS | linux-allwinner-5.19 | 5.19.0-1015.15~22.04.1 | UBUNTU-CVE-2023-35788 |
| Ubuntu:22.04:LTS | linux-allwinner-5.19 | 5.19.0-1015.15~22.04.1 | USN-6192-1 |
| Ubuntu:22.04:LTS | linux-aws | 5.15.0-1039.44 | USN-6193-1 |
| Ubuntu:22.04:LTS | linux-aws | 5.15.0-1039.44 | UBUNTU-CVE-2023-35788 |
| Ubuntu:22.04:LTS | linux-aws-5.19 | 5.19.0-1028.29~22.04.1 | USN-6192-1 |
| Ubuntu:22.04:LTS | linux-aws-5.19 | 5.19.0-1028.29~22.04.1 | UBUNTU-CVE-2023-35788 |
| Ubuntu:22.04:LTS | linux-aws-6.2 | no fix listed | UBUNTU-CVE-2023-35788 |
| Ubuntu:22.04:LTS | linux-azure | 5.15.0-1041.48 | USN-6193-1 |
| Ubuntu:22.04:LTS | linux-azure | 5.15.0-1041.48 | UBUNTU-CVE-2023-35788 |
| Ubuntu:22.04:LTS | linux-azure-5.19 | no fix listed | UBUNTU-CVE-2023-35788 |
| Ubuntu:22.04:LTS | linux-azure-6.2 | no fix listed | UBUNTU-CVE-2023-35788 |
| Ubuntu:22.04:LTS | linux-azure-fde | 5.15.0-1041.48.1 | UBUNTU-CVE-2023-35788 |
| Ubuntu:22.04:LTS | linux-azure-fde | 5.15.0-1041.48.1 | USN-6223-1 |
| Ubuntu:22.04:LTS | linux-azure-fde-5.19 | no fix listed | UBUNTU-CVE-2023-35788 |
| Ubuntu:22.04:LTS | linux-azure-fde-6.2 | no fix listed | UBUNTU-CVE-2023-35788 |
| Ubuntu:22.04:LTS | linux-gcp | 5.15.0-1037.45 | USN-6193-1 |
| Ubuntu:22.04:LTS | linux-gcp | 5.15.0-1037.45 | UBUNTU-CVE-2023-35788 |
| Ubuntu:22.04:LTS | linux-gcp-5.19 | 5.19.0-1027.29~22.04.1 | UBUNTU-CVE-2023-35788 |
| Ubuntu:22.04:LTS | linux-gcp-5.19 | 5.19.0-1027.29~22.04.1 | USN-6192-1 |
| Ubuntu:22.04:LTS | linux-gke | 5.15.0-1037.42 | UBUNTU-CVE-2023-35788 |
| Ubuntu:22.04:LTS | linux-gke | 5.15.0-1037.42 | USN-6193-1 |
| Ubuntu:22.04:LTS | linux-gkeop | 5.15.0-1023.28 | USN-6193-1 |
| Ubuntu:22.04:LTS | linux-gkeop | 5.15.0-1023.28 | UBUNTU-CVE-2023-35788 |
| Ubuntu:22.04:LTS | linux-hwe-5.19 | 5.19.0-46.47~22.04.1 | UBUNTU-CVE-2023-35788 |
| Ubuntu:22.04:LTS | linux-hwe-5.19 | 5.19.0-46.47~22.04.1 | USN-6192-1 |
| Ubuntu:22.04:LTS | linux-ibm | 5.15.0-1033.36 | UBUNTU-CVE-2023-35788 |
| Ubuntu:22.04:LTS | linux-ibm | 5.15.0-1033.36 | USN-6193-1 |
| Ubuntu:22.04:LTS | linux-intel-iotg | 5.15.0-1034.39 | USN-6212-1 |
| Ubuntu:22.04:LTS | linux-intel-iotg | 5.15.0-1034.39 | UBUNTU-CVE-2023-35788 |
| Ubuntu:22.04:LTS | linux-kvm | 5.15.0-1037.42 | UBUNTU-CVE-2023-35788 |
| Ubuntu:22.04:LTS | linux-kvm | 5.15.0-1037.42 | USN-6193-1 |
| Ubuntu:22.04:LTS | linux-lowlatency | 5.15.0-76.83 | USN-6193-1 |
| Ubuntu:22.04:LTS | linux-lowlatency | 5.15.0-76.83 | UBUNTU-CVE-2023-35788 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-5.19 | no fix listed | UBUNTU-CVE-2023-35788 |
| Ubuntu:22.04:LTS | linux-nvidia | 5.15.0-1028.28 | USN-6193-1 |
| Ubuntu:22.04:LTS | linux-nvidia | 5.15.0-1028.28 | UBUNTU-CVE-2023-35788 |
| Ubuntu:22.04:LTS | linux-nvidia-6.2 | no fix listed | UBUNTU-CVE-2023-35788 |
| Ubuntu:22.04:LTS | linux-nvidia-tegra | 5.15.0-1015.15 | UBUNTU-CVE-2023-35788 |
| Ubuntu:22.04:LTS | linux-nvidia-tegra-igx | 5.15.0-1002.2 | UBUNTU-CVE-2023-35788 |
| Ubuntu:22.04:LTS | linux-oem-5.17 | 5.17.0-1034.35 | USN-6206-1 |
| Ubuntu:22.04:LTS | linux-oem-5.17 | 5.17.0-1034.35 | UBUNTU-CVE-2023-35788 |
| Ubuntu:22.04:LTS | linux-oem-6.0 | 6.0.0-1019.19 | UBUNTU-CVE-2023-35788 |
| Ubuntu:22.04:LTS | linux-oem-6.0 | 6.0.0-1019.19 | USN-6235-1 |
| Ubuntu:22.04:LTS | linux-oem-6.1 | 6.1.0-1015.15 | UBUNTU-CVE-2023-35788 |
| Ubuntu:22.04:LTS | linux-oem-6.1 | 6.1.0-1015.15 | USN-6194-1 |
| Ubuntu:22.04:LTS | linux-oracle | 5.15.0-1038.44 | USN-6193-1 |
| Ubuntu:22.04:LTS | linux-oracle | 5.15.0-1038.44 | UBUNTU-CVE-2023-35788 |
| Ubuntu:22.04:LTS | linux-raspi | 5.15.0-1033.36 | USN-6193-1 |
| Ubuntu:22.04:LTS | linux-raspi | 5.15.0-1033.36 | UBUNTU-CVE-2023-35788 |
| Ubuntu:24.04:LTS | linux-raspi-realtime | no fix listed | UBUNTU-CVE-2023-35788 |
| Ubuntu:22.04:LTS | linux-realtime | no fix listed | UBUNTU-CVE-2023-35788 |
| Ubuntu:22.04:LTS | linux-riscv | no fix listed | UBUNTU-CVE-2023-35788 |
| Ubuntu:22.04:LTS | linux-riscv-5.19 | 5.19.0-1021.23~22.04.1 | UBUNTU-CVE-2023-35788 |
| Ubuntu:22.04:LTS | linux-starfive-5.19 | 5.19.0-1020.22~22.04.1 | UBUNTU-CVE-2023-35788 |
| Ubuntu:22.04:LTS | linux-starfive-5.19 | 5.19.0-1020.22~22.04.1 | USN-6192-1 |
| Ubuntu:22.04:LTS | linux-xilinx-zynqmp | 5.15.0-1023.27 | UBUNTU-CVE-2023-35788 |
Affected products (as reported)
Weakness: CWE-787 · 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/2023/06/07/1
- https://git.kernel.org/linus/4d56304e5827c8cc8cc18c75343d283af7c4825c
- https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.3.7
- [oss-security] 20230617 Re: Linux kernel: off-by-one in fl_set_geneve_opt mailing-list
- DSA-5448 vendor-advisory
- https://security.netapp.com/advisory/ntap-20230714-0002/
- [debian-lts-announce] 20230727 [SECURITY] [DLA 3508-1] linux security update mailing-list
- DSA-5480 vendor-advisory
- http://packetstormsecurity.com/files/174577/Kernel-Live-Patch-Security-Notice-LSN-0097-1.html
- [debian-lts-announce] 20231019 [SECURITY] [DLA 3623-1] linux-5.10 security update mailing-list