CVE-2026-40614 (GCVE-0-2026-40614)
Vulnerability from cvelistv5
Published
2026-04-21 18:04
Modified
2026-04-22 13:33
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-122 - Heap-based Buffer Overflow
Summary
PJSIP is a free and open source multimedia communication library written in C. In 2.16 and earlier, there is a buffer overflow when decoding Opus audio frames due to insufficient buffer size validation in the Opus codec decode path. The FEC decode buffers (dec_frame[].buf) were allocated based on a PCM-derived formula: (sample_rate/1000) * 60 * channel_cnt * 2. At 8 kHz mono this yields only 960 bytes, but codec_parse() can output encoded frames up to MAX_ENCODED_PACKET_SIZE (1280) bytes via opus_repacketizer_out_range(). The three pj_memcpy() calls in codec_decode() copied input->size bytes without bounds checking, causing a heap buffer overflow.
References
| URL | Tags | |
|---|---|---|
{
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"content": {
"id": "CVE-2026-40614",
"options": [
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"Exploitation": "none"
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{
"Automatable": "no"
},
{
"Technical Impact": "total"
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],
"role": "CISA Coordinator",
"timestamp": "2026-04-22T13:32:43.106128Z",
"version": "2.0.3"
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"dateUpdated": "2026-04-22T13:33:23.816Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
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"title": "CISA ADP Vulnrichment"
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"cna": {
"affected": [
{
"product": "pjproject",
"vendor": "pjsip",
"versions": [
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"status": "affected",
"version": "\u003c= 2.16"
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"value": "PJSIP is a free and open source multimedia communication library written in C. In 2.16 and earlier, there is a buffer overflow when decoding Opus audio frames due to insufficient buffer size validation in the Opus codec decode path. The FEC decode buffers (dec_frame[].buf) were allocated based on a PCM-derived formula: (sample_rate/1000) * 60 * channel_cnt * 2. At 8 kHz mono this yields only 960 bytes, but codec_parse() can output encoded frames up to MAX_ENCODED_PACKET_SIZE (1280) bytes via opus_repacketizer_out_range(). The three pj_memcpy() calls in codec_decode() copied input-\u003esize bytes without bounds checking, causing a heap buffer overflow."
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "LOCAL",
"baseScore": 8.5,
"baseSeverity": "HIGH",
"privilegesRequired": "NONE",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "PASSIVE",
"vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "HIGH"
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"providerMetadata": {
"dateUpdated": "2026-04-21T18:04:15.159Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
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"references": [
{
"name": "https://github.com/pjsip/pjproject/security/advisories/GHSA-j59p-4xrr-fp8g",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/pjsip/pjproject/security/advisories/GHSA-j59p-4xrr-fp8g"
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{
"name": "https://github.com/pjsip/pjproject/commit/17897e835818f8ee03b1806ddcd7b95ea16d2c0e",
"tags": [
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"url": "https://github.com/pjsip/pjproject/commit/17897e835818f8ee03b1806ddcd7b95ea16d2c0e"
}
],
"source": {
"advisory": "GHSA-j59p-4xrr-fp8g",
"discovery": "UNKNOWN"
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"title": "PJSIP: Heap buffer overflow in Opus codec decoding"
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"datePublished": "2026-04-21T18:04:15.159Z",
"dateReserved": "2026-04-14T14:07:59.642Z",
"dateUpdated": "2026-04-22T13:33:23.816Z",
"state": "PUBLISHED"
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"dataType": "CVE_RECORD",
"dataVersion": "5.2"
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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