Description
An array overflow was discovered in mt76_add_fragment in drivers/net/wireless/mediatek/mt76/dma.c in the Linux kernel before 5.5.10, aka CID-b102f0c522cf. An oversized packet with too many rx fragments can corrupt memory of adjacent pages.
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 | 5.5.13-1 | — |
| Debian 13 | linux | 5.5.13-1 | — |
| Debian 12 | linux | 5.5.13-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv +2 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gke +4 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-aws-5.3 | 5.3.0-1017.18~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-azure-5.3 | 5.3.0-1020.21~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-gcp +6 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp-5.3 +1 | 5.3.0-1018.19~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-gke-5.0 | 5.0.0-1035.36 | — |
| Ubuntu 18.04 LTS | linux-hwe | 5.3.0-51.44~18.04.2 | — |
| Ubuntu 18.04 LTS | linux-oem-osp1 | 5.0.0-1050.55 | — |
| Ubuntu 18.04 LTS | linux-oracle-5.3 | 5.3.0-1016.18~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-raspi2-5.3 | 5.3.0-1023.25~18.04.1 | — |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | perf +26 | 4.18.0-240.el8 | RHSA-2020:4431 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | kernel-tools-libs-devel | 4.18.0-240.el8 | ALSA-2020:4431 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | perf +19 | 4.18.0-240.el8 | ELSA-2020-4431 |
| Oracle Linux 7 | kernel-uek +4 | 5.4.17-2011.3.2.1.el8uek | ELSA-2020-5714 |
| Oracle Linux 7 | perf +3 | 5.4.17-2011.3.2.1.el7uek | ELSA-2020-5714 |
Advisories 5
- ALSA-2020:4431 Moderate: kernel security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2020:4431 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- WID-SEC-2025-2774 Linux Kernel: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff BSI CERT-Bund (WID) · Dec 9, 2025
- ELSA-2020-4431 Moderate: kernel security, bug fix, and enhancement update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Nov 10, 2020
- ELSA-2020-5714 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jun 9, 2020
References
- https://github.com/torvalds/linux/commit/b102f0c522cf668c8382c56a4f771b37d011cda2
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b102f0c522cf668c8382c56a4f771b37d011cda2
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.5.10
- https://security.netapp.com/advisory/ntap-20200608-0001/