CVE-2026-57184 asterisk CVE debrief

Who should care

Defenders responsible for Asterisk installations should assess exposure and prioritize patching or mitigations. This includes operators, platform administrators, vulnerability management teams, and security teams who need to verify if the chan_ooh323 addon channel driver is in use and exposed, and apply patches or mitigations as necessary to prevent potential crashes.

Why it matters

Defenders should prioritize verifying if the `chan_ooh323` addon channel driver is in use and exposed, and apply patches or mitigations as necessary to prevent potential crashes.

• Potential crash of Asterisk service
• Verification of chan_ooh323 addon channel driver usage and exposure
• Patching or mitigation of vulnerable Asterisk installations

Technical summary

The chan_ooh323 addon channel driver in Asterisk is vulnerable to an out-of-bounds read issue in the Q.931 information-element parser. This issue may allow an unauthenticated attacker to crash Asterisk using carefully crafted setup packets. The chan_ooh323 addon channel driver must be explicitly compiled and installed, which is not the default, and its port must be publicly reachable. Defenders should prioritize verifying if the chan_ooh323 addon channel driver is in use and exposed, and apply patches or mitigations as necessary to prevent potential crashes.

Defensive priority

Defenders should prioritize verifying if the `chan_ooh323` addon channel driver is in use and exposed, and apply patches or mitigations as necessary.

Recommended defensive actions

• Verify if the chan_ooh323 addon channel driver is in use and exposed
• Apply patches or mitigations as necessary
• Monitor for potential exploitation attempts
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and NVD vulnerability detail page provide information on the issue, but do not offer specific details on exploitation or impact. The source references provide additional context on the commits and releases related to the fix.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.