CVE-2026-64054: net: shaper: reject duplicate leaves in GROUP request
High 7.8 EPSS 0.1% Linux kernel
In the Linux kernel, the following vulnerability has been resolved: net: shaper: reject duplicate leaves in GROUP request net_shaper_nl_group_doit() does not deduplicate NET_SHAPER_A_LEAVES entries. When userspace supplies the same leaf handle twice, the same old-parent pointer lands twice in old_nodes[]. The cleanup loop double frees the parent. Of course the same parent may still be in old_nodes[] twice if we are moving multiple of its leaves. Note that this patch also implicitly fixes the fact that the i >= leaves_count path forgets to set ret.
- CVE-2026-64054CVE identifier
- 7.8CVSS 3.1 base score (high)
- 0.1%EPSS: chance of exploitation in the next 30 days (higher than 2% of CVEs)
- 2026-07-19published
What do these terms mean? CVE · CVSS score · exploited (KEV) · EPSS · backported fix · all terms
What to do now
- Check whether you run Linux kernel and which version (commands below).
- Install the fixed version for your system: see “Patch it” below.
- Reboot into the new kernel (uname -r to confirm); live patching (kpatch, Ubuntu Livepatch, SUSE kGraft/klp) can defer the reboot for some CVEs
Affected and fixed versions
Affected:
- Linux Linux 5d5d4700e75d861e83bf18eb6bf66ff90f85fe4e to before 5098b223f0f0c5c18a3884a8b0ea5bd4a0c7bd75
- Linux Linux 5d5d4700e75d861e83bf18eb6bf66ff90f85fe4e to before 31767bf852b59f05125b58a17007e4cd1ea9eb2e
- Linux Linux 5d5d4700e75d861e83bf18eb6bf66ff90f85fe4e to before a9a2fa1da619f276580b0d4c5d12efac89e8642b
- Linux Linux 6.13
Patch it
Use the commands for your system. Distribution packages often keep an older version number with the fix backported, so compare with the fixed package versions in the table below, not only with the upstream version.
Debian
sudo apt update
sudo apt install --only-upgrade linux-image-amd64Ubuntu
sudo apt update
sudo apt install --only-upgrade linux-image-generic (or the installed flavour: linux-image-aws, -azure, -gcp, -virtual)RHEL, AlmaLinux, Rocky, Oracle
sudo dnf upgrade --refresh kernelFedora
sudo dnf upgrade --refresh kernelSUSE / openSUSE
sudo zypper refresh
sudo zypper update kernel-defaultAmazon Linux
sudo dnf upgrade --releasever=latest kernel kernel6.12Arch Linux
sudo pacman -SyuAlpine
apk update && apk upgrade linux-lts linux-virtFreeBSD
not LinuxGeneral update steps for every system are on the Linux and Unix & BSD pages; after updating, see which services to restart.
Fix status in Linux distributions
| Release | Package | Status | Fixed version / advisory |
|---|---|---|---|
| Debian 12 | linux | not affected | |
| Debian 13 | linux | not affected | |
| Debian testing | linux | fixed | 7.0.12-1 |
| Red Hat Enterprise Linux 9 | kernel | affected | |
| Red Hat Enterprise Linux 10 | kernel | affected | |
From the Debian security tracker, Ubuntu CVE tracker and Red Hat Security Data API, refreshed every few hours.
Sources
- https://git.kernel.org/stable/c/5098b223f0f0c5c18a3884a8b0ea5bd4a0c7bd75
- https://git.kernel.org/stable/c/31767bf852b59f05125b58a17007e4cd1ea9eb2e
- https://git.kernel.org/stable/c/a9a2fa1da619f276580b0d4c5d12efac89e8642b
- CVE-2026-64054 on CVE.org
- CVE-2026-64054 on NVD
Page generated automatically from official sources on 2026-11-03 18:05 UTC. Always confirm with your vendor's advisory.