CVE-2026-74665
Linux kernel XDP skb fragment accounting bug causes data corruption and kernel pointer leak.
Is CVE-2026-74665 being exploited?
Not confirmed. CVE-2026-74665 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 0.37% probability of exploitation in the next 30 days.
How severe is CVE-2026-74665?
CVE-2026-74665 is rated Critical with a CVSS score of 9.1. 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-2026-74665?
Yes. A fix has been recorded for CVE-2026-74665. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-74665 affect?
CVE-2026-74665 affects Linux kernel (XDP/generic_xdp skb handling). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-74665?
Install vendor kernel updates; restrict untrusted UDP/XDP traffic until patched.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Crafted fragmented UDP packets with XDP adjustments can cause userspace to over-read kernel memory (pointer leak) and truncate/corrupt UDP payloads; info disclosure and data integrity loss.
Immediate action required
- affected>= e6d5dbdd20aa6a86974af51deb9414cd2e7794cb and < 72468efcc089782fa047afddd10856b11a14ef5b
- affected>= e6d5dbdd20aa6a86974af51deb9414cd2e7794cb and < 5f30f9c302cea1f2ebf97abe574c1826544223d7
- affected>= e6d5dbdd20aa6a86974af51deb9414cd2e7794cb and < ea1ccd6d1c6370868e3b032a3fc575b9c397f2e1
- affected>= e6d5dbdd20aa6a86974af51deb9414cd2e7794cb and < 33f2b2eb33d666ecac68031e0f31424fb70528db
- affected6.9
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.