CVE-2026-112013 True Audio CVE debrief

Who should care

Defenders responsible for maintaining systems that use the libtta library should assess exposure and prioritize verification of compensating controls or updates to mitigate the vulnerability.

Why it matters

The CVE-2026-112013 vulnerability in libtta through 2.3 allows attackers to crash applications by supplying an unvalidated zero sample rate, posing a medium priority risk for defenders to assess exposure and prioritize mitigation.

• Application crashes due to SIGFPE
• Potential for denial-of-service attacks
• Need for input validation to mitigate the vulnerability
• Verification of system resilience to crafted .tta files

Technical summary

The libtta library through version 2.3 contains a divide-by-zero vulnerability in the tta_decoder_init_get_info() function. An attacker can exploit this vulnerability by crafting a .tta file with a recomputed header CRC32 that triggers SIGFPE, causing applications that use the libtta library to crash. The vulnerability is caused by a divide-by-zero error in the tta_decoder_init_get_info() function, which can be triggered by supplying an unvalidated zero sample rate. This vulnerability poses a medium priority risk for defenders to assess exposure and prioritize mitigation.

Defensive priority

Medium priority for defenders to assess exposure, as the vulnerability can cause application crashes.

Recommended defensive actions

• Assess exposure by checking if the vulnerable libtta library is used in the environment
• Verify if any compensating controls, such as input validation, are in place to mitigate the vulnerability
• Consider updating to a fixed version of libtta, if available
• 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 vulnerability is caused by a divide-by-zero error in the tta_decoder_init_get_info() function. An attacker can craft a .tta file with a recomputed header CRC32 that triggers SIGFPE, crashing applications including the bundled tta console tool.

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.