Description
Gitoxide gix-pack before 0.75.0 contains an uncontrolled memory allocation vulnerability that allows remote attackers to abort the process by supplying a huge pack-header object count. Malicious remotes can serve a 12-byte pack header claiming 0xFFFFFFFF objects, forcing Tree::with_capacity to reserve hundreds of gigabytes and crash clone or fetch operations.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| GitoxideLabs | gix-pack | < 0.75.0 | 0.75.0 |
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 | rust-gix-pack | No fix yet | — |
| Debian 13 | rust-gix-pack | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | rust-gix | No fix yet | — |
| Ubuntu 26.04 LTS | rust-gix | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Hardened Images 1 | rust +18 | 1.99.0-1.1.hum1 | RHSA-2026:83879, RHSA-2026:83849 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | grok-build | 1.0.45+git20260929.2bdd1d6-2.1 | openSUSE-SU-2026:12141-1 |
| openSUSE Tumbleweed | openai-codex | 0.162.1-2.1 | openSUSE-SU-2026:12144-1 |
| openSUSE Leap 16.0 | grok-build | 1.0.45+git20260929.2bdd1d6-bp160.2.1 | openSUSE-SU-2026:22130-1 |
| openSUSE Leap 16.0 | stgit | 2.7.0-bp160.1.1 | openSUSE-SU-2026:22204-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | rust | No fix yet | — |
Advisories 6
- openSUSE-SU-2026:22204-1 Security update for stgit SUSE / openSUSE Security Updates · Oct 31, 2026
- openSUSE-SU-2026:22130-1 Security update for grok-build SUSE / openSUSE Security Updates · Oct 20, 2026
- RHSA-2026:83879 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:83849 Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- openSUSE-SU-2026:12141-1 grok-build-1.0.45+git20260929.2bdd1d6-2.1 on GA media SUSE / openSUSE Security Updates · Oct 16, 2026
- openSUSE-SU-2026:12144-1 openai-codex-0.162.1-2.1 on GA media SUSE / openSUSE Security Updates · Oct 16, 2026
References
- GitHub Security Advisory (GHSA-x862-c2wj-4mwr) vendor-advisory
- VulnCheck Advisory: Gitoxide gix-pack before 0.75.0 Denial of Service via Pack Header Object Count third-party-advisory