Description
Out-of-bounds write possible in Git when git-merge(1) used on tag with more than two GPG signatures
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| git-for-windows | Git | 2.50.1 | — |
| git-for-windows | Git | 2.56.0 | — |
| git-for-windows | Git | 2.55.0 | — |
| git-for-windows | Git | 2.53.0 | — |
| git-for-windows | Git | 2.54.0 | — |
| git-for-windows | Git | 2.52.0 | — |
| git-for-windows | Git | 2.51.2 | — |
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 | git | No fix yet | — |
| Debian 13 | git | No fix yet | — |
| Debian 12 | git | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | git | No fix yet | — |
| Ubuntu 26.04 LTS | git | No fix yet | — |
| Ubuntu 24.04 LTS | git | No fix yet | — |
| Ubuntu 22.04 LTS | git | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | git | No fix yet | — |
| Ubuntu Pro 18.04 LTS | git | No fix yet | — |
| Ubuntu Pro 16.04 LTS | git | No fix yet | — |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | git | 2.54.1-r0 | — |
| Alpine v3.23 | git | 2.52.1-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | git +16 | 2.50.1-1.amzn2023.0.2 | ALAS2023-2026-3445 |
| Amazon Linux 2 | git +16 | 2.47.3-1.amzn2.0.2 | ALAS2-2026-4109 |
Advisories 3
- WID-SEC-2026-4455 git: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 12, 2026
- ALAS2023-2026-3445 Important: git security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Nov 12, 2026
- ALAS2-2026-4109 Important: git security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Nov 12, 2026