Is CVE-2026-104598 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-104598 being exploited in the wild.

How severe is CVE-2026-104598?

Informational severity, published 26 October 2026.

Which products and versions are affected?

Osmocom Libosmo-Sigtran through 2.2.1.

Is there a fix for CVE-2026-104598?

Yes: fixed in Fixed in commit b554131f2cbb20ca9a9cf51ca17d73f644eff1f8 (versions after 2.2.1). Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-104598 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-104598?

Check whether you run Osmocom Libosmo-Sigtran at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-104598: libosmo-sigtran out-of-bounds read in M3UA NOTIFY decoder

CVE-2026-104598 · Severity: info · Published 2026-10-26

libosmo-sigtran is a signaling protocol library used in telecommunications systems to handle network routing and management messages. An out-of-bounds memory read vulnerability in the M3UA NOTIFY message decoder could allow a remote attacker to read sensitive data from the application's memory. The vulnerability exists because the code did not properly validate that notification strings were null-terminated before copying them.

Vendors: Osmocom.

Quick answers

Is CVE-2026-104598 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-104598 being exploited in the wild.
How severe is CVE-2026-104598?: Informational severity, published 26 October 2026.
Which products and versions are affected?: Osmocom Libosmo-Sigtran through 2.2.1.
Is there a fix for CVE-2026-104598?: Yes: fixed in Fixed in commit b554131f2cbb20ca9a9cf51ca17d73f644eff1f8 (versions after 2.2.1). Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-104598 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-104598?: Check whether you run Osmocom Libosmo-Sigtran at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: Fixed in commit b554131f2cbb20ca9a9cf51ca17d73f644eff1f8 (versions after 2.2.1)

Technical details

The M3UA NOTIFY decoder in src/m3ua.c performs an unsafe memory copy of an INFO String IE (Information Element) without ensuring null termination, leading to an out-of-bounds read. The decoder is reachable by any remote peer sending a crafted M3UA NOTIFY message over the network. An attacker can leak sensitive information from adjacent memory by sending messages with improperly terminated strings.

Affected products

osmocom libosmo-sigtran through 2.2.1

Timeline

2026-10-26: disclosed

References

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