What is CVE-2026-45991?

CVE-2026-45991 is a high-severity vulnerability in Linux. CVSS score: 7.8/10. Published 2026-05-27.

How severe is CVE-2026-45991?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Linux

CVE-2026-45991

In the Linux kernel, the following vulnerability has been resolved: udf: fix partition descriptor append bookkeeping Mounting a crafted UDF image with repeated partition descriptors can trigger a heap out-of-bounds write in part_descs_lo…

EPSS: 0.000 (2.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Linux — versions ee4af50ca94f58afc3532662779b9cf80bbe27c8, 7f401f160a9c7a1ff84ba3cb9b2f636d1f5cfb6b, 4.18.7

References

416baaa9-dc9f-4396-8d5f-8c081fb06d67
416baaa9-dc9f-4396-8d5f-8c081fb06d67
416baaa9-dc9f-4396-8d5f-8c081fb06d67
416baaa9-dc9f-4396-8d5f-8c081fb06d67

Frequently asked questions

What is CVE-2026-45991?: CVE-2026-45991 is a high-severity vulnerability in Linux. CVSS score: 7.8/10. Published 2026-05-27.
How severe is CVE-2026-45991?: High severity. CVSS v3 base score is 7.8 out of 10.