Description
vbf_stp_error in bin/varnishd/cache/cache_fetch.c in Varnish HTTP Cache 4.1.x before 4.1.9 and 5.x before 5.2.1 allows remote attackers to obtain sensitive information from process memory because a VFP_GetStorage buffer is larger than intended in certain circumstances involving -sfile Stevedore transient objects.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | Varnish HTTP Cache 4.1.x before 4.1.9 and 5.x before 5.2.1 | Varnish HTTP Cache 4.1.x before 4.1.9 and 5.x before 5.2.1 | — |
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 13 | varnish | 5.2.1-1 | — |
| Debian 12 | varnish | 5.2.1-1 | — |
| Debian 9 | varnish | 5.0.0-7+deb9u2 | DSA-4034-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | varnish | 4.1.1-1ubuntu0.2+esm1 | USN-4824-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | varnish | 5.2.1-r0 | — |
| Alpine v3.23 | varnish | 5.2.1-r0 | — |
| Alpine v3.22 | varnish | 5.2.1-r0 | — |
| Alpine v3.21 | varnish | 5.2.1-r0 | — |
| Alpine v3.20 | varnish | 5.2.1-r0 | — |
Show 17 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | varnish | 5.2.1-r0 | — |
| Alpine v3.18 | varnish | 5.2.1-r0 | — |
| Alpine v3.17 | varnish | 5.2.1-r0 | — |
| Alpine v3.16 | varnish | 5.2.1-r0 | — |
| Alpine v3.15 | varnish | 5.2.1-r0 | — |
| Alpine v3.14 | varnish | 5.2.1-r0 | — |
| Alpine v3.13 | varnish | 5.2.1-r0 | — |
| Alpine v3.12 | varnish | 5.2.1-r0 | — |
| Alpine v3.11 | varnish | 5.2.1-r0 | — |
| Alpine v3.10 | varnish | 5.2.1-r0 | — |
| Alpine v3.9 | varnish | 5.2.1-r0 | — |
| Alpine v3.8 | varnish | 5.2.1-r0 | — |
| Alpine v3.7 | varnish | 5.2.1-r0 | — |
| Alpine v3.6 | varnish | 4.1.9-r0 | — |
| Alpine v3.5 | varnish | 4.1.9-r0 | — |
| Alpine v3.4 | varnish | 4.1.9-r0 | — |
| Alpine v3.3 | varnish | 4.1.9-r0 | — |
Advisories 2
- USN-4824-1 varnish vulnerability Ubuntu Security Notices (USN) · Jun 25, 2026
- DSA-4034-1 varnish - security update Debian Security (DSA / DLA) · Mar 9, 2026