Linux kernel is core infrastructure used broadly; remote kernel compromise risk is widely impactful and newsworthy.
CVE-2026-72351
Linux kernel GUE packet parsing bug allows remote kernel compromise.
Is CVE-2026-72351 being exploited?
Not confirmed. CVE-2026-72351 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 0.74% probability of exploitation in the next 30 days.
How severe is CVE-2026-72351?
CVE-2026-72351 is rated Critical with a CVSS score of 9.8. 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-2026-72351?
Yes. A fix has been recorded for CVE-2026-72351. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-72351 affect?
CVE-2026-72351 affects Linux kernel (GUE/Generic UDP Encapsulation), Linux distributions with GUE enabled. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-72351?
Apply vendor kernel updates ASAP; block/inspect GUE traffic until patched.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote attacker can send crafted GUE packets to trigger OOB reads, kernel crash, info leak or potential remote code execution.
Immediate action required
- affected>= c1aa8347e73e4092411fbd96cc59531fb7e76d04 and < 158b9995d3c87f3b93f5c22df54a12e12a3438b3
- affected>= c1aa8347e73e4092411fbd96cc59531fb7e76d04 and < 7c6876ec1b227261b51803f784c7be1b2242a1a0
- affected>= c1aa8347e73e4092411fbd96cc59531fb7e76d04 and < 2c4de9988e9ddc760b750d6b6e701c35ff60ad14
- affected>= c1aa8347e73e4092411fbd96cc59531fb7e76d04 and < 2a99224c120823987e4d829726f4ecb33e03fc1e
- affected>= c1aa8347e73e4092411fbd96cc59531fb7e76d04 and < 61e78679c7c9ca685bff58e4b6348304dc60aafd
- affected>= c1aa8347e73e4092411fbd96cc59531fb7e76d04 and < 4a4a1d41c6e901e773bcf795f562a47fa71f692a
- affected>= c1aa8347e73e4092411fbd96cc59531fb7e76d04 and < f618cbe9b24cd0202004d2db781d5f80ab77037f
- affected>= c1aa8347e73e4092411fbd96cc59531fb7e76d04 and < d335dcc6f521571d57117b8deeebc940836e5450
- affected3.19
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.