CVE-2026-72029
Linux iosm wwan decoder allows out-of-bounds reads and softirq DoS via crafted modem data.
Is CVE-2026-72029 being exploited?
Not confirmed. CVE-2026-72029 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 0.40% probability of exploitation in the next 30 days.
How severe is CVE-2026-72029?
CVE-2026-72029 is rated High. 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-2026-72029?
Yes. A fix has been recorded for CVE-2026-72029. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-72029 affect?
CVE-2026-72029 affects Linux kernel (iosm wwan driver), Embedded gateways/routers with iosm, Devices using affected cellular modems. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-72029?
Apply vendor/kernel updates ASAP; isolate untrusted modems and monitor dmesg/syslog.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Device-supplied indexes/lengths can cause OOB reads (info leak/crash) and an infinite softirq loop causing DoS; attacker controlling modem/downlink can trigger.
Patch when possible
- affected>= 1f52d7b622854b8bd7a1be3de095ca2e1f77098e and < 155851e501d6c649cbcfcca6472dc26269b04b6b
- affected>= 1f52d7b622854b8bd7a1be3de095ca2e1f77098e and < 2b822df8e498aa6ca828e16afd8ffec27f7e4c88
- affected>= 1f52d7b622854b8bd7a1be3de095ca2e1f77098e and < 55cfea8e8d9117ad086d1e1a0ff87f306f8e3ad0
- affected>= 1f52d7b622854b8bd7a1be3de095ca2e1f77098e and < 07f5eb6d268a37bd9e131079489655cd599182e0
- affected>= 1f52d7b622854b8bd7a1be3de095ca2e1f77098e and < 77f0023f22f6a2616ae128e9c93961b24ae52611
- affected>= 1f52d7b622854b8bd7a1be3de095ca2e1f77098e and < 526b8ef54668780c8f69e0211c342763d5dcbad1
- affected5.18
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.