Description
Weaknesses in the generation of TCP/UDP source ports and some other header values in Google's gVisor allowed them to be predicted by an external attacker in some circumstances.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| gVisor | — | release-20241028.0 |
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 | golang-gvisor-gvisor | 0.0~20240729.0-1 | — |
| Debian 13 | golang-gvisor-gvisor | 0.0~20240729.0-1 | — |
| Debian 12 | golang-gvisor-gvisor | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | golang-gvisor-gvisor | No fix yet | — |
| Ubuntu 26.04 LTS | golang-gvisor-gvisor +1 | No fix yet | — |
| Ubuntu 25.10 | golang-gvisor-gvisor +1 | No fix yet | — |
| Ubuntu 24.04 LTS | golang-gvisor-gvisor +1 | No fix yet | — |
| Ubuntu 22.04 LTS | golang-inet-netstack | No fix yet | — |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | podman | 5.6.1-2 | — |
| Azure Linux 2 (CBL-Mariner) | podman | No fix yet | — |
References
- https://github.com/google/gvisor/commit/83f75082e5b03fafca9201d9d9939028f712b0b2
- https://github.com/google/gvisor/commit/cbdb2c61b1f753834cedf2ebe68cbc335dadca52
- https://github.com/google/gvisor/commit/5d2bf2546805afa09a6f6d9b23ec267823e32205
- https://www.ndss-symposium.org/wp-content/uploads/2025-122-paper.pdf