Linux kernel is pervasive; remote kernel-memory corruption (CVSS 9.8) can disrupt infrastructure and enable kernel RCE—broad impact across organizations.
CVE-2026-74662
Remote kernel memory-corruption in Linux IP fragment reassembly (inet/frags).
Is CVE-2026-74662 being exploited?
Not confirmed. CVE-2026-74662 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 0.51% probability of exploitation in the next 30 days.
How severe is CVE-2026-74662?
CVE-2026-74662 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-2026-74662?
Yes. A fix has been recorded for CVE-2026-74662. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-74662 affect?
CVE-2026-74662 affects Linux kernel (inet/frag subsystem), Linux distributions using affected kernels. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-74662?
Apply vendor/kernel patches immediately; block or filter fragmented IP traffic.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote kernel memory corruption via IP fragment reassembly; can cause DoS or enable kernel RCE/privilege escalation.
Immediate action required
- affected>= 648700f76b03b7e8149d13cc2bdb3355035258a9 and < f4e4dab62181b7fe7c011bed6fbef9fc3d48c769
- affected>= 648700f76b03b7e8149d13cc2bdb3355035258a9 and < 4ed0681dc2c1e0538b79d2fc56190ffcb369dacd
- affected>= 648700f76b03b7e8149d13cc2bdb3355035258a9 and < 08a04d7bfb9c103432561aff8a62b6872e694a6a
- affected>= 648700f76b03b7e8149d13cc2bdb3355035258a9 and < d3ffb89b2944672cf7bdd8e9ee577d2043b4a956
- affected>= 648700f76b03b7e8149d13cc2bdb3355035258a9 and < 39c6c4b267b65f00e0b0335a2ae00cbe9e3174f0
- affected>= 648700f76b03b7e8149d13cc2bdb3355035258a9 and < 9f904dd3e455750e5d4ec9b2f134835811b85a2f
- affected>= 648700f76b03b7e8149d13cc2bdb3355035258a9 and < 928128865e43b197e30688dc1bc991592c97edcf
- affected>= 648700f76b03b7e8149d13cc2bdb3355035258a9 and < 653d7ddf6cba867777a3d14c4f83ace008c5ad13
- affected493107105843f299662b3b664a83804645564f12
- affected>= 4.4.174 and < 4.5
- affected4.17
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.