Description
An issue was discovered in net/ceph/messenger_v2.c in the Linux kernel before 6.4.5. There is an integer signedness error, leading to a buffer overflow and remote code execution via HELLO or one of the AUTH frames. This occurs because of an untrusted length taken from a TCP packet in ceph_decode_32.
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 | 6.4.11-1 | — |
| Debian 13 | linux | 6.4.11-1 | — |
| Debian 12 | linux | 6.1.52-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Nvidia-BlueField 22.04 LTS | linux-bluefield | 5.15.0-1027.29 | — |
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux | 5.15.0-86.96 | USN-6416-1 |
| Ubuntu 22.04 LTS | linux-aws | 5.15.0-1047.52 | USN-6416-1 |
| Ubuntu 22.04 LTS | linux-aws-6.2 | 6.2.0-1015.15~22.04.1 | USN-6464-1 |
| Ubuntu 22.04 LTS | linux-azure | 5.15.0-1049.56 | USN-6416-1 |
| Ubuntu 22.04 LTS | linux-azure-6.2 +1 | 6.2.0-1016.16~22.04.1 | USN-6464-1 |
| Ubuntu 22.04 LTS | linux-azure-fde | 5.15.0-1049.56.1 | USN-6416-1 |
| Ubuntu 22.04 LTS | linux-azure-fde-6.2 | 6.2.0-1016.16~22.04.1.1 | USN-6464-1 |
| Ubuntu 22.04 LTS | linux-gcp | 5.15.0-1044.52 | USN-6416-1 |
| Ubuntu 22.04 LTS | linux-gcp-6.2 | 6.2.0-1018.20~22.04.1 | USN-6464-1 |
| Ubuntu 22.04 LTS | linux-gke +1 | 5.15.0-1044.49 | USN-6416-1 |
| Ubuntu 22.04 LTS | linux-gkeop | 5.15.0-1030.35 | USN-6416-1 |
| Ubuntu 22.04 LTS | linux-hwe-6.2 | 6.2.0-36.37~22.04.1 | USN-6464-1 |
| Ubuntu 22.04 LTS | linux-ibm +1 | 5.15.0-1040.43 | USN-6416-3, USN-6416-1 |
| Ubuntu 22.04 LTS | linux-intel-iotg | 5.15.0-1043.49 | USN-6445-1 |
| Ubuntu 22.04 LTS | linux-lowlatency | 5.15.0-86.95 | USN-6416-1 |
| Ubuntu 22.04 LTS | linux-nvidia | 5.15.0-1037.37 | USN-6416-1 |
| Ubuntu 22.04 LTS | linux-nvidia-6.2 | 6.2.0-1011.11 | USN-6466-1 |
| Ubuntu 22.04 LTS | linux-nvidia-tegra | 5.15.0-1018.18 | — |
| Ubuntu 22.04 LTS | linux-nvidia-tegra-igx | 5.15.0-1005.5 | — |
| Ubuntu 22.04 LTS | linux-oem-6.1 | 6.1.0-1019.19 | — |
| Ubuntu 22.04 LTS | linux-oracle | 5.15.0-1045.51 | USN-6416-1 |
| Ubuntu 22.04 LTS | linux-riscv +12 | No fix yet | — |
| Ubuntu 22.04 LTS | linux-starfive-6.2 | 6.2.0-1009.10~22.04.1 | USN-6520-1 |
| Ubuntu 22.04 LTS | linux-xilinx-zynqmp | 5.15.0-1025.29 | — |
| Ubuntu 20.04 LTS | linux-aws-5.15 | 5.15.0-1047.52~20.04.1 | USN-6416-1 |
| Ubuntu 20.04 LTS | linux-azure-5.15 | 5.15.0-1049.56~20.04.1 | USN-6416-1 |
| Ubuntu 20.04 LTS | linux-azure-fde-5.15 | 5.15.0-1049.56~20.04.1.1 | USN-6416-1 |
| Ubuntu 20.04 LTS | linux-gcp-5.15 | 5.15.0-1044.52~20.04.1 | USN-6416-1 |
| Ubuntu 20.04 LTS | linux-gke +26 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gkeop-5.15 | 5.15.0-1030.35~20.04.1 | USN-6416-1 |
| Ubuntu 20.04 LTS | linux-hwe-5.15 | 5.15.0-86.96~20.04.1 | USN-6416-2 |
| Ubuntu 20.04 LTS | linux-ibm-5.15 | 5.15.0-1040.43~20.04.1 | USN-6416-1 |
| Ubuntu 20.04 LTS | linux-intel-iotg-5.15 | 5.15.0-1043.49~20.04.1 | USN-6445-2 |
| Ubuntu 20.04 LTS | linux-lowlatency-hwe-5.15 | 5.15.0-86.95~20.04.1 | USN-6416-1 |
| Ubuntu 20.04 LTS | linux-nvidia-tegra-5.15 | 5.15.0-1018.18~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-oracle-5.15 | 5.15.0-1045.51~20.04.1 | USN-6416-2 |
| Ubuntu 20.04 LTS | linux-riscv-5.15 | 5.15.0-1043.47~20.04.1 | — |
| 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 | 5.15.0-1040.42 | — |
| Ubuntu Pro Realtime 22.04 LTS | linux-realtime | 5.15.0-1048.54 | — |
| Ubuntu Pro FIPS-preview 22.04 LTS | linux-fips | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | bpftool | 7.0.0-284.30.1.el9_2 | RHSA-2023:5069 |
| RHEL 9 | perf +48 | 5.14.0-284.30.1.el9_2 | RHSA-2023:5069 |
| RHEL 8 | perf +26 | 4.18.0-477.27.1.el8_8 | RHSA-2023:5244 |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhev Hypervisor 4 | perf +2 | 4.18.0-372.70.1.el8_6 | RHSA-2023:4789 |
| RHEL 9.0 EUS | perf +29 | 5.14.0-70.70.1.el9_0 | RHSA-2023:4801 |
| RHEL 8.6 EUS | perf +26 | 4.18.0-372.70.1.el8_6 | RHSA-2023:4789 |
| RHEL 8.4 TUS | perf +17 | 4.18.0-305.103.1.el8_4 | RHSA-2023:4962 |
| RHEL 8.4 E4S | perf +25 | 4.18.0-305.103.1.el8_4 | RHSA-2023:4962 |
| RHEL 8.4 AUS | perf +17 | 4.18.0-305.103.1.el8_4 | RHSA-2023:4962 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | kernel-livepatch-6.1.41-63.109 | 1.0-0.amzn2023 | ALAS2023-2023-299 |
| Amazon Linux 2023 | perf +12 | 6.1.41-63.109.amzn2023 | ALAS2023-2023-299 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 2 (CBL-Mariner) | kernel | 5.15.135.1-2 | — |
Advisories 15
- USN-6416-1 linux, linux-aws, linux-aws-5.15, linux-azure, linux-azure-5.15, linux-azure-fde, linux-azure-fde-5.15, linux-gcp, linux-gcp-5.15, linux-gke, linux-gkeop, linux-gkeop-5.15, linux-ibm, linux-ibm-5.15, linux-kvm, linux-lowlatency, linux-lowlatency-hwe-5.15, linux-nvidia, linux-oracle vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-6464-1 linux, linux-aws, linux-aws-6.2, linux-azure, linux-azure-6.2, linux-azure-fde-6.2, linux-gcp, linux-gcp-6.2, linux-hwe-6.2, linux-kvm, linux-lowlatency, linux-lowlatency-hwe-6.2, linux-oracle, linux-raspi, linux-starfive vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-6416-2 linux-hwe-5.15, linux-oracle-5.15 vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-6445-1 linux-intel-iotg vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-6466-1 linux-nvidia-6.2 vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-6445-2 linux-intel-iotg-5.15 vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-6416-3 linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-6520-1 linux-starfive-6.2 vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- RHSA-2023:5069 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2023:5244 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2023:4962 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2023:4801 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2023:4789 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- ALAS2023-2023-299 Important: kernel security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Feb 11, 2026
- WID-SEC-2023-2515 Linux Kernel: Schwachstelle ermöglicht Codeausführung BSI CERT-Bund (WID) · Jan 18, 2024
References
- https://github.com/google/security-research/security/advisories/GHSA-jg27-jx6w-xwph
- https://www.spinics.net/lists/ceph-devel/msg57909.html
- https://github.com/torvalds/linux/commit/a282a2f10539dce2aa619e71e1817570d557fc97
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a282a2f10539dce2aa619e71e1817570d557fc97
- https://security.netapp.com/advisory/ntap-20231116-0003/