CVE-2026-57941: Apache HTTP Server: mod_http2 use-after-free / wild write via shared session->bbtmp re-entrancy
Apache HTTP Server: mod_http2 use-after-free / wild write via shared session->bbtmp re-entrancy
- Published by source
- 2026-10-13
- First seen by Reality Radar
- 2026-10-22
- Last verified
- 2026-10-22
Affected
- Manufacturer
- Microsoft
- Products
- azl3 httpd 2.4.68-1 on Azure Linux 3.0
- CPE
- cpe:2.3:a:microsoft:azl3_httpd_2.4.68-1:*:*:*:*:*:*:*:*
Whether your exact unit is affected depends on the model, serial number and region in the official notice.
What the official notice says
Risk: Critical
Remedy / actions:
- Install the latest Microsoft security update
Is this affecting you?
Add what you own or use and Reality Radar will tell you when official changes match it — with evidence and next steps.
Sources
- Microsoft Security Update Guide (MSRC) Tier A · official published 2026-10-13
Evidence ledger
Every piece of evidence we store is appended to a public hash chain, so later edits are detectable. Anyone can re-verify it.
| Entry | Kind | Observed | Evidence hash | Entry hash |
|---|---|---|---|---|
| #194 | new | 2026-10-22 | b35ebb3bbc50…019a9b | ca6cae089667…770991 |
Chain head: #1076 8ad5adc30b9b…88ce20