CVE-2026-90782 json
S2OPC through 1.7.3 NULL Pointer Dereference in alloc_notification_message_items()
published 2026-09-13 56 d ago modified 2026-09-23 46 d ago also EUVD-2026-77009
- cvss
- 5.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 47%
- public exploits
- 0
- none known
Summary
S2OPC through 1.7.3 contains a null pointer dereference in msg_subscription_publish_bs__alloc_notification_message_items() where a failed allocation for DataChangeNotification is overwritten by a successful allocation for EventNotificationList. Attackers can trigger heap allocation failures on sessions with both data-change and event notifications to cause the server process to terminate.
Patch / fix
- gitlab.com/systerel/S2OPC@8848f05 commit
- gitlab.com/systerel/S2OPC#1862 pull request
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 55 d ago
Exploit prediction
0.57% chance of exploitation in the next 30 days, higher than 47% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- gitlab.com https://gitlab.com/systerel/S2OPC/-/issues/1815 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H |
| CNA | 4.0 | 6.0 | CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
| CNA | 4.0 | 6.0 | CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/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 |
Affected products
- Systerel S2OPC
Classification
- Weakness
-
- CWE-476 NULL Pointer Dereference
References
-
gitlab.com
/systerel/S2OPC/-/commit/8848f051eed069b107ae7cb16a346d6f6386a8f5
patch
-
gitlab.com
/systerel/S2OPC/-/merge_requests/1862
patch
-
gitlab.com
/systerel/S2OPC/-/issues/1815
issue-tracking, exploit
-
gitlab.com
/systerel/S2OPC/-/blob/S2OPC_Toolkit_1.7.3/src/ClientServer/services/b2c/msg_subscription_publish_bs.c#L106-L1
technical-description
-
gitlab.com
/systerel/S2OPC
product
-
vulncheck.com
/advisories/s2opc-through-1.7.3-null-pointer-dereference-in-alloc-notification-message-items
third-party-advisory
Sources
- CVE List CVE-2026-90782
- NVD CVE-2026-90782
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.