CVE-2026-40892
published 2026-04-21CVE-2026-40892: PJSIP is a free and open source multimedia communication library written in C. In 2.16 and earlier, a stack buffer overflow exists in…
PriorityP356critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EPSS
0.42%
33.6th percentile
PJSIP is a free and open source multimedia communication library written in C. In 2.16 and earlier, a stack buffer overflow exists in pjsip_auth_create_digest2() in PJSIP when using pre-computed digest credentials (PJSIP_CRED_DATA_DIGEST). The function copies credential data using cred_info->data.slen as the length without an upper-bound check, which can overflow the fixed-size ha1 stack buffer (128 bytes) if data.slen exceeds the expected digest string length.
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| pjsip | pjproject | <= 2.16 | — |
| pjsip | pjsip | < 2.17 | 2.17 |
CVSS provenance
nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvdv4.08.1HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-40892 pjproject: PJSIP: Arbitrary code execution or denial of service via stack buffer overflow in digest creation [fedora-all]
bugzilla·2026-04-22·CVSS 8.1
CVE-2026-40892 [HIGH] CVE-2026-40892 pjproject: PJSIP: Arbitrary code execution or denial of service via stack buffer overflow in digest creation [fedora-all]
CVE-2026-40892 pjproject: PJSIP: Arbitrary code execution or denial of service via stack buffer overflow in digest creation [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Bugzilla
CVE-2026-40892 pjproject: PJSIP: Arbitrary code execution or denial of service via stack buffer overflow in digest creation [epel-all]
bugzilla·2026-04-22·CVSS 8.1
CVE-2026-40892 [HIGH] CVE-2026-40892 pjproject: PJSIP: Arbitrary code execution or denial of service via stack buffer overflow in digest creation [epel-all]
CVE-2026-40892 pjproject: PJSIP: Arbitrary code execution or denial of service via stack buffer overflow in digest creation [epel-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Bugzilla
CVE-2026-40892 PJSIP: PJSIP: Arbitrary code execution or denial of service via stack buffer overflow in digest creation
bugzilla·2026-04-21·CVSS 8.1
CVE-2026-40892 [HIGH] CVE-2026-40892 PJSIP: PJSIP: Arbitrary code execution or denial of service via stack buffer overflow in digest creation
CVE-2026-40892 PJSIP: PJSIP: Arbitrary code execution or denial of service via stack buffer overflow in digest creation
PJSIP is a free and open source multimedia communication library written in C. In 2.16 and earlier, a stack buffer overflow exists in pjsip_auth_create_digest2() in PJSIP when using pre-computed digest credentials (PJSIP_CRED_DATA_DIGEST). The function copies credential data using cred_info->data.slen as the length without an upper-bound check, which can overflow the fixed-size ha1 stack buffer (128 bytes) if data.slen exceeds the expected digest string length.
2026-04-21
Published