What is CVE-2026-53266?

CVE-2026-53266 is a high-severity vulnerability in Linux. CVSS score: 8.8/10. Published 2026-06-25.

How severe is CVE-2026-53266?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Linux

CVE-2026-53266

In the Linux kernel, the following vulnerability has been resolved: netfilter: bridge: make ebt_snat ARP rewrite writable The ebtables SNAT target keeps the Ethernet source address rewrite behind skb_ensure_writable(skb, 0). This is int…

EPSS: 0.001 (2.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

Affected products

Linux — versions 63137bc5882a1882c553d389fdeeeace86ee1741, 2f3839075a5f8dcf116c1abe35b36b018ac62445, 51ba2945a8ef65ae437c8f9ba05f0343aa82ae5b
Linux Linux_kernel — versions 7.1

References

416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)

Frequently asked questions

What is CVE-2026-53266?: CVE-2026-53266 is a high-severity vulnerability in Linux. CVSS score: 8.8/10. Published 2026-06-25.
How severe is CVE-2026-53266?: High severity. CVSS v3 base score is 8.8 out of 10.