Description
In the Linux kernel, the following vulnerability has been resolved:
batman-adv: tt: fix TOCTOU race for reported vlans
The local TT based TVLV is generated by first checking the number of VLANs
which have at least one TT entry. A new buffer with the correct size for
the VLANs is then allocated. Only then, the list of VLANs s used to fill
the VLAN entries in the buffer. During this time, the meshif_vlan_list_lock
is held. But the actual number of TT entries of each VLAN can still
increase during this time - just not the number of VLANs in the list.
But the prefilter used in the buffer size calculation might still cause an
increase of the number of VLANs which need to be stored. Simply because a
VLAN might now suddenly have at least one entry when it had none in the
pre-alloc check - and then needs to occupy space which was not allocated.
It is better to overestimate the buffer size at the beginning and then fill
the buffer only with the VLANs which are not empty.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Linux | Linux | 3.16.60 – < 3.17, 4.4.217 – < 4.5, 4.9.217 – < 4.10, 4.14.174 – < 4.15, 4.17 | 3.17 |
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 | 7.0.12-1 | — |
| Debian 13 | linux | 6.12.94-1 | — |
| Debian 12 | linux | 6.1.176-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Nvidia-BlueField 24.04 LTS | linux-bluefield | 6.8.0-1031.36 | — |
| Ubuntu Nvidia-BlueField 22.04 LTS | linux-bluefield | 5.15.0-1100.102 | — |
| Ubuntu 26.04 LTS | linux | 7.0.0-28.28 | — |
| Ubuntu 26.04 LTS | linux-aws +2 | 7.0.0-1009.9 | USN-8618-1, USN-8603-1 |
| Ubuntu 26.04 LTS | linux-gcp +1 | 7.0.0-1008.8 | USN-8593-1 |
| Ubuntu 26.04 LTS | linux-gke | 7.0.0-1003.4 | — |
| Ubuntu 26.04 LTS | linux-ibm +1 | 7.0.0-1010.10 | USN-8603-1, USN-8593-1 |
| Ubuntu 26.04 LTS | linux-nvidia | 7.0.0-1016.16 | USN-8663-1 |
| Ubuntu 26.04 LTS | linux-nvidia-bos | 7.0.0-2016.16 | USN-8664-1 |
| Ubuntu 26.04 LTS | linux-raspi | 7.0.0-1015.15 | USN-8618-1 |
| Ubuntu 26.04 LTS | linux-riscv +1 | 7.0.0-28.28.1 | — |
| Ubuntu 24.04 LTS | linux | 6.8.0-142.142 | USN-8817-1 |
| Ubuntu 24.04 LTS | linux-aws | 6.8.0-1065.68 | USN-8817-3 |
| Ubuntu 24.04 LTS | linux-azure | 6.8.0-1068.76 | USN-8817-1 |
| Ubuntu 24.04 LTS | linux-azure-7.0 | 7.0.0-1014.14~24.04.1 | USN-8728-2 |
| Ubuntu 24.04 LTS | linux-azure-fde | 6.8.0-1066.73 | USN-8817-1 |
| Ubuntu 24.04 LTS | linux-azure-fde-7.0 | 7.0.0-1013.13~24.04.1 | — |
| Ubuntu 24.04 LTS | linux-gcp | 6.8.0-1069.77 | USN-8817-1 |
| Ubuntu 24.04 LTS | linux-gcp-7.0 +1 | 7.0.0-1011.11~24.04.1 | USN-8728-3, USN-8728-1 |
| Ubuntu 24.04 LTS | linux-gke | 6.8.0-1064.72 | USN-8817-1 |
| Ubuntu 24.04 LTS | linux-gkeop | 6.8.0-1050.54 | USN-8817-1 |
| Ubuntu 24.04 LTS | linux-hwe-7.0 | 7.0.0-28.28~24.04.1 | — |
| Ubuntu 24.04 LTS | linux-ibm | 6.8.0-1065.66 | USN-8817-1 |
| Ubuntu 24.04 LTS | linux-lowlatency | 6.8.0-142.142.1 | USN-8817-1 |
| Ubuntu 24.04 LTS | linux-nvidia | 6.8.0-1063.66 | USN-8842-1 |
| Ubuntu 24.04 LTS | linux-nvidia-7.0 | 7.0.0-1016.16~24.04.1 | USN-8663-1 |
| Ubuntu 24.04 LTS | linux-nvidia-lowlatency | 6.8.0-1063.66.1 | USN-8842-1 |
| Ubuntu 24.04 LTS | linux-nvidia-tegra | 6.8.0-1035.38 | USN-8781-1 |
| Ubuntu 24.04 LTS | linux-oracle | 6.8.0-1062.65 | USN-8817-1 |
| Ubuntu 24.04 LTS | linux-raspi | 6.8.0-1065.69 | USN-8817-1 |
| Ubuntu 24.04 LTS | linux-riscv +29 | No fix yet | — |
| Ubuntu 24.04 LTS | linux-riscv-7.0 | 7.0.0-28.28.1~24.04.3 | — |
| Ubuntu 24.04 LTS | linux-vmware | 6.8.0-1008.8 | — |
| Ubuntu 22.04 LTS | linux +1 | 5.15.0-194.204 | USN-8818-4, USN-8818-1 |
| Ubuntu 22.04 LTS | linux-aws | 5.15.0-1116.123 | USN-8818-1 |
| Ubuntu 22.04 LTS | linux-aws-6.8 | 6.8.0-1065.68~22.04.1 | USN-8817-3 |
| Ubuntu 22.04 LTS | linux-azure | 5.15.0-1122.131 | USN-8818-1 |
| Ubuntu 22.04 LTS | linux-azure-6.8 | 6.8.0-1068.76~22.04.1 | USN-8817-1 |
| Ubuntu 22.04 LTS | linux-azure-fde | 5.15.0-1121.130 | USN-8818-1 |
| Ubuntu 22.04 LTS | linux-azure-fde-6.8 | 6.8.0-1066.73~22.04.1 | USN-8817-1 |
| Ubuntu 22.04 LTS | linux-gcp | 5.15.0-1117.127 | USN-8818-1 |
| Ubuntu 22.04 LTS | linux-gcp-6.8 | 6.8.0-1069.77~22.04.1 | USN-8817-1 |
| Ubuntu 22.04 LTS | linux-gke | 5.15.0-1112.118 | USN-8818-1 |
| Ubuntu 22.04 LTS | linux-gkeop | 5.15.0-1099.107 | USN-8818-1 |
| Ubuntu 22.04 LTS | linux-hwe-6.8 | 6.8.0-149.149~22.04.1 | USN-9066-1 |
| Ubuntu 22.04 LTS | linux-ibm | 5.15.0-1110.114 | USN-8818-1 |
| Ubuntu 22.04 LTS | linux-ibm-6.8 | 6.8.0-1066.67~22.04.1 | USN-8906-1 |
| Ubuntu 22.04 LTS | linux-intel-iotg | 5.15.0-1111.117 | USN-8818-1 |
| Ubuntu 22.04 LTS | linux-kvm | 5.15.0-1108.113 | USN-8818-1 |
| Ubuntu 22.04 LTS | linux-lowlatency-hwe-6.8 | 6.8.0-142.142.1~22.04.1 | USN-8817-1 |
| Ubuntu 22.04 LTS | linux-nvidia | 5.15.0-1111.112 | USN-8818-4 |
| Ubuntu 22.04 LTS | linux-nvidia-6.8 | 6.8.0-1063.66~22.04.1 | USN-8842-1 |
| Ubuntu 22.04 LTS | linux-nvidia-tegra | 5.15.0-1068.70 | USN-8818-5 |
| Ubuntu 22.04 LTS | linux-nvidia-tegra-igx | 5.15.0-1057.57 | USN-8818-5 |
| Ubuntu 22.04 LTS | linux-oracle | 5.15.0-1113.119 | USN-8818-1 |
| Ubuntu 22.04 LTS | linux-oracle-6.8 | 6.8.0-1062.65~22.04.1 | USN-8817-1 |
| Ubuntu 22.04 LTS | linux-raspi | 5.15.0-1110.113 | USN-8871-1 |
| Ubuntu 22.04 LTS | linux-riscv +32 | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv-6.8 | 6.8.0-142.142~22.04.1 | — |
| Ubuntu 22.04 LTS | linux-xilinx-zynqmp | 5.15.0-1079.83 | USN-8818-1 |
Show 17 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | linux-gke +28 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp +14 | No fix yet | — |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
| Ubuntu Pro Realtime 24.04 LTS | linux-raspi-realtime | 6.8.0-2054.56 | USN-8817-1 |
| Ubuntu Pro Realtime 24.04 LTS | linux-realtime | 6.8.1-1060.61 | USN-8817-1 |
| Ubuntu Pro Realtime 24.04 LTS | linux-realtime-6.14 +1 | No fix yet | — |
| Ubuntu Pro Realtime 22.04 LTS | linux-intel-iot-realtime | 5.15.0-1108.110 | USN-8818-1 |
| Ubuntu Pro Realtime 22.04 LTS | linux-realtime | 5.15.0-1115.124 | USN-8818-1 |
| Ubuntu Pro Realtime 22.04 LTS | linux-realtime-6.8 | 6.8.1-1060.61~22.04.1 | USN-8817-1 |
| Ubuntu Pro FIPS 20.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro FIPS 18.04 LTS | linux-fips | No fix yet | — |
| Ubuntu Pro FIPS-updates 24.04 LTS | linux-aws-fips | 6.8.0-1065.68+fips1 | USN-8817-2 |
| Ubuntu Pro FIPS-updates 24.04 LTS | linux-fips | 6.8.0-142.142+fips1 | USN-8817-1 |
| Ubuntu Pro FIPS-updates 24.04 LTS | linux-gcp-fips +1 | 6.8.0-1068.76+fips1 | USN-8817-1 |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-aws-fips | 5.15.0-1116.123+fips1 | USN-8818-1 |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-azure-fips | 5.15.0-1122.131+fips1 | USN-8818-1 |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-fips | 5.15.0-194.204+fips1 | USN-8818-6 |
| Ubuntu Pro FIPS-updates 22.04 LTS | linux-gcp-fips | 5.15.0-1116.126+fips1 | USN-8818-1 |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro FIPS-updates 16.04 LTS | linux-fips | No fix yet | — |
| Ubuntu Pro FIPS-preview 22.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro 20.04 LTS | linux +10 | No fix yet | — |
| Ubuntu Pro 20.04 LTS | linux-aws-5.15 | 5.15.0-1116.123~20.04.1 | USN-8818-3 |
| Ubuntu Pro 20.04 LTS | linux-azure-5.15 | 5.15.0-1122.131~20.04.1 | USN-8818-3 |
| Ubuntu Pro 20.04 LTS | linux-azure-fde-5.15 | 5.15.0-1121.130~20.04.1 | USN-8818-3 |
| Ubuntu Pro 20.04 LTS | linux-gcp-5.15 | 5.15.0-1118.128~20.04.1 | USN-8878-1 |
| Ubuntu Pro 20.04 LTS | linux-hwe-5.15 +1 | 5.15.0-194.204~20.04.1 | USN-8818-1 |
| Ubuntu Pro 20.04 LTS | linux-ibm-5.15 +1 | 5.15.0-1110.114~20.04.1 | USN-8818-2 |
| Ubuntu Pro 20.04 LTS | linux-intel-iotg-5.15 | 5.15.0-1111.117~20.04.1 | USN-8818-3 |
| Ubuntu Pro 20.04 LTS | linux-nvidia-tegra-5.15 | 5.15.0-1068.70~20.04.1 | USN-8849-1 |
| Ubuntu Pro 20.04 LTS | linux-oracle-5.15 | 5.15.0-1114.120~20.04.1 | USN-8879-1 |
| Ubuntu Pro 18.04 LTS | linux +12 | No fix yet | — |
| Ubuntu Pro 16.04 LTS | linux +7 | No fix yet | — |
| Ubuntu Pro 14.04 LTS | linux-aws +2 | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | kernel-64kb +8 | 6.12.0-160000.37.1 | SUSE-SU-2026:23231-1, SUSE-SU-2026:23221-1 |
| SLES for SAP 16.0 | kernel-default-base | 6.12.0-160000.37.1.160000.2.19 | SUSE-SU-2026:23231-1, SUSE-SU-2026:23221-1 |
| SLES 16.0 | kernel-64kb +8 | 6.12.0-160000.37.1 | SUSE-SU-2026:23237-1, SUSE-SU-2026:23231-1, SUSE-SU-2026:23221-1 |
| SLES 16.0 | kernel-default-base | 6.12.0-160000.37.1.160000.2.19 | SUSE-SU-2026:23231-1, SUSE-SU-2026:23221-1 |
| SLE Micro 6.2 | kernel-default-base | 6.12.0-160000.37.1.160000.2.19 | SUSE-SU-2026:23068-1 |
| SLE Micro 6.2 | kernel-rt +5 | 6.12.0-160000.37.1 | SUSE-SU-2026:23068-1, SUSE-SU-2026:23066-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 16.0 | kernel-default-base | 6.12.0-160000.37.1.160000.2.19 | openSUSE-SU-2026:21555-1 |
| openSUSE Leap 16.0 | kernel-rt +11 | 6.12.0-160000.37.1 | openSUSE-SU-2026:21555-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | kernel-uek +34 | 6.12.0-206.104.3.3.el10uek | ELSA-2026-500248 |
Advisories 33
- USN-9066-1 linux-hwe-6.8 vulnerabilities Ubuntu Security Notices (USN) · Nov 12, 2026
- WID-SEC-2026-2403 Linux Kernel: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff BSI CERT-Bund (WID) · Nov 12, 2026
- USN-8879-1 linux-oracle-5.15 vulnerabilities Ubuntu Security Notices (USN) · Nov 12, 2026
- USN-8728-1 linux-gcp-7.0 vulnerabilities Ubuntu Security Notices (USN) · Nov 12, 2026
- USN-8728-2 linux-azure-7.0 vulnerabilities Ubuntu Security Notices (USN) · Nov 12, 2026
- USN-8728-3 linux-oracle-7.0 vulnerabilities Ubuntu Security Notices (USN) · Nov 12, 2026
- USN-8878-1 linux-gcp-5.15 vulnerabilities Ubuntu Security Notices (USN) · Nov 12, 2026
- USN-8906-1 linux-ibm-6.8 vulnerabilities Ubuntu Security Notices (USN) · Nov 9, 2026
- USN-8593-1 linux-ibm, linux-oracle vulnerabilities Ubuntu Security Notices (USN) · Nov 9, 2026
- USN-8664-1 linux-nvidia-bos vulnerabilities Ubuntu Security Notices (USN) · Nov 9, 2026
- USN-8603-1 linux-azure, linux-azure-fde vulnerabilities Ubuntu Security Notices (USN) · Nov 9, 2026
- USN-8663-1 linux-nvidia, linux-nvidia-7.0 vulnerabilities Ubuntu Security Notices (USN) · Nov 9, 2026
- USN-8781-1 linux-nvidia-tegra vulnerabilities Ubuntu Security Notices (USN) · Nov 9, 2026
- USN-8618-1 linux-aws, linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Nov 9, 2026
- USN-8817-1 linux, linux-azure, linux-azure-6.8, linux-azure-fde, linux-azure-fde-6.8, linux-azure-fips, linux-fips, linux-gcp, linux-gcp-6.8, linux-gcp-fips, linux-gke, linux-gkeop, linux-ibm, linux-lowlatency, linux-lowlatency-hwe-6.8, linux-oracle, linux-oracle-6.8, linux-raspi, linux-raspi-realtime, linux-realtime, linux-realtime-6.8 vulnerabilities Ubuntu Security Notices (USN) · Nov 6, 2026
- USN-8818-1 linux-aws, linux-aws-fips, linux-azure, linux-azure-fde, linux-azure-fips, linux-gcp, linux-gcp-fips, linux-gke, linux-gkeop, linux-hwe-5.15, linux-ibm, linux-intel-iot-realtime, linux-intel-iotg, linux-kvm, linux-lowlatency, linux-lowlatency-hwe-5.15, linux-oracle, linux-realtime, linux-xilinx-zynqmp vulnerabilities Ubuntu Security Notices (USN) · Nov 6, 2026
- USN-8818-3 linux-aws-5.15, linux-azure-5.15, linux-azure-fde-5.15, linux-intel-iotg-5.15 vulnerabilities Ubuntu Security Notices (USN) · Nov 6, 2026
- USN-8817-2 linux-aws-fips vulnerabilities Ubuntu Security Notices (USN) · Nov 6, 2026
- USN-8817-3 linux-aws, linux-aws-6.8 vulnerabilities Ubuntu Security Notices (USN) · Nov 6, 2026
- USN-8871-1 linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Nov 6, 2026
- USN-8842-1 linux-nvidia, linux-nvidia-6.8, linux-nvidia-lowlatency vulnerabilities Ubuntu Security Notices (USN) · Nov 6, 2026
- USN-8818-4 linux, linux-nvidia vulnerabilities Ubuntu Security Notices (USN) · Nov 6, 2026
- USN-8818-5 linux-nvidia-tegra, linux-nvidia-tegra-igx vulnerabilities Ubuntu Security Notices (USN) · Nov 6, 2026
- USN-8818-6 linux-fips vulnerabilities Ubuntu Security Notices (USN) · Nov 6, 2026
- USN-8849-1 linux-nvidia-tegra-5.15 vulnerabilities Ubuntu Security Notices (USN) · Nov 6, 2026
- USN-8818-2 linux-ibm-5.15 vulnerabilities Ubuntu Security Notices (USN) · Nov 6, 2026
- ELSA-2026-500248 Important: Unbreakable Enterprise kernel security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Sep 4, 2026
- SUSE-SU-2026:23231-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Aug 27, 2026
- SUSE-SU-2026:23237-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Aug 27, 2026
- SUSE-SU-2026:23221-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Aug 27, 2026
- SUSE-SU-2026:23066-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Aug 15, 2026
- SUSE-SU-2026:23068-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Aug 15, 2026
- openSUSE-SU-2026:21555-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Aug 12, 2026
References
- https://git.kernel.org/stable/c/e4236bf3ec8d6bb15d0d8d825dcf9933a7d6666b
- https://git.kernel.org/stable/c/724a8eb4155669797c96b70d70e354284ae3b5a8
- https://git.kernel.org/stable/c/211ea59988e1cba43cb0367ad65d379b56f9c3bd
- https://git.kernel.org/stable/c/65a1e67339aa8c95ac544b796946af388930ee23
- https://git.kernel.org/stable/c/b4d4efd4e351593c81e9293d4b4408d244fa5ee7
- https://git.kernel.org/stable/c/4cc85aec8d3c9ab4dc716dc9f1ed36fca16b227f
- https://git.kernel.org/stable/c/9a9c859457bc440a55773e01ff18b1bb5bab6836
- https://git.kernel.org/stable/c/94d27005016be15ffc638b2ecbc4d58805ad7b48