Bug 2548667 (CVE-2026-15340)
| Summary: | CVE-2026-15340 lwip: Savannah lwIP SMTP client Classic Buffer Overflow | ||
|---|---|---|---|
| Product: | [Other] Security Response | Reporter: | OSIDB Bzimport <bzimport> |
| Component: | vulnerability | Assignee: | Product Security DevOps Team <prodsec-dev> |
| Status: | NEW --- | QA Contact: | |
| Severity: | high | Docs Contact: | |
| Priority: | high | ||
| Version: | unspecified | Keywords: | Security |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | --- | |
| Doc Text: |
A flaw was found in lwIP. The Simple Mail Transfer Protocol (SMTP) client does not properly validate the size of inputs, leading to a buffer overflow. A malicious SMTP server could use this flaw to crash or possibly execute arbitrary code with the privileges of the SMTP client by sending an excessively long SMTP protocol AUTH message.
|
Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | Type: | --- | |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
|
Description
OSIDB Bzimport
2026-10-09 15:18:42 UTC
CISA ICS advisory page: https://www.cisa.gov/news-events/ics-advisories/icsa-26-279-02 mentions the fix is available in the upstream commit 614420f82c8729d070e01464c0dddb3c9525c772: https://cgit.git.savannah.nongnu.org/cgit/lwip.git/commit/?id=614420f82c8729d070e01464c0dddb3c9525c772 This commit references upstream bug report #68313, which is currently not public: https://savannah.nongnu.org/bugs/?68313 The ocproxy component in Fedora / EPEL claims to bundle lwIP. However, it does not build smtp.c or any of the lwip/src/apps code, it only builds lwip/src/core, and is therefore not affected by this issue. |