CVE-2026-49759
Stack-based buffer overflow in Erlang OTP erts inet_drv; unauthenticated remote crash via SCTP ERROR chunk.
Is CVE-2026-49759 being exploited?
Not confirmed. CVE-2026-49759 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.50% probability of exploitation in the next 30 days.
How severe is CVE-2026-49759?
CVE-2026-49759 is rated High with a CVSS score of 8.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-49759?
Yes. A fix has been recorded for CVE-2026-49759. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-49759 affect?
CVE-2026-49759 affects Erlang/OTP runtime (erts) versions: OTP 17.0.x before 27.3.4.13; 28.5.0.2; 29.0.2; erts 6.0 before 15.2.7.9; 16.4.0.2; 17.0.2. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-49759?
Upgrade to fixed OTP/erts versions.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote crash of BEAM VM via crafted SCTP ERROR chunk; DoS; potential memory leakage; no RCE.
Patch when possible
- affected>= 6.0 and < *
- affected>= 17.0 and < *
- affected>= 84adefa331c4159d432d22840663c38f155cd4c1 and < 3983d495284331c121f600a80bac9fcf4e16381e
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.