01 Record

CVE-2026-64324

udf: validate free block extents against the partition length

HighPUBLISHEDCNA: Linux

CNA base score7.8 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

View raw JSON

02 Description

udf: validate free block extents against the partition length

03 Exploitation and scoring

Exploitation: Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision: Not assessed by CISA
EPSS probability: 0.16% probability of exploitation activity in the next 30 days.
EPSS percentile: Ranks above 5.4% of scored records. A rank, not a probability.
NVD base score: 7.8 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD analysis status: Analyzed. NVD last modified this record on 2026-09-04.
Red Hat severity: Low. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2026-07-25 08:49Z1 MO AGO

Last updated

2026-08-17 04:53Z18 DAYS AGO

Reserved

2026-07-19

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 7.8)

CNA CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-129Improper Validation of Array IndexVariant

Data version

5.2

Document digest

be1c125360dda6037c9f0644d11959abccdc4ac0de9605dd8f3b4123613e9348

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux934f815345c09c290a9b9a9cfdddc203ec2117e8 to < fdd6229d2ae9914c1f25d1041db0f4f312a4fa76, 22cc7323f090646c8cfb5939e6f15bdc2ed3fd27 to < b54aee5652fcd7c23a0904a4623ec462c3edc70c, 7c4fa9ebfce69619d132fe703dc2e2cf62a13723 to < 12af328d2ee8d68e81ba612246d0b54b22d23e1f, 5cc9745e2ea11aef7d5c9a42bc36f6cd3e1b4cc3 to < fb49099206c5c57af28a157249fa7bcb5518f99e, 56e69e59751d20993f243fb7dd6991c4e522424c to < 9442d75429b0c556292a7454fe888d54259f5240, 56e69e59751d20993f243fb7dd6991c4e522424c to < 335202ab25b01fdd45889ff25eab70864686dea3, 56e69e59751d20993f243fb7dd6991c4e522424c to < be87de7789a82a030a4896bc7683415ec9fa6f2b, 56e69e59751d20993f243fb7dd6991c4e522424c to < 5f0419457f89dce1a3f1c8e62a3adf2f39ab8168, 097420e48e30f51e8f4f650b5c946f5af63ec1a3, 5def895b42ef16a2da6402818cba8d7ec8ede1ef, 05fb2bf477d3fe5421bd4cb699574737f52bd88b, 5.10.224 to < 5.10.261, 5.15.165 to < 5.15.212, 6.1.105 to < 6.1.178, 6.6.46 to < 6.6.145, 4.19.320 to < 4.20, 5.4.282 to < 5.5, 6.10.5 to < 6.11, 6.11—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/fdd6229d2ae9914c1f25d1041db0f4f312a4fa76
git.kernel.orghttps://git.kernel.org/stable/c/b54aee5652fcd7c23a0904a4623ec462c3edc70c
git.kernel.orghttps://git.kernel.org/stable/c/12af328d2ee8d68e81ba612246d0b54b22d23e1f
git.kernel.orghttps://git.kernel.org/stable/c/fb49099206c5c57af28a157249fa7bcb5518f99e
git.kernel.orghttps://git.kernel.org/stable/c/9442d75429b0c556292a7454fe888d54259f5240
git.kernel.orghttps://git.kernel.org/stable/c/335202ab25b01fdd45889ff25eab70864686dea3
git.kernel.orghttps://git.kernel.org/stable/c/be87de7789a82a030a4896bc7683415ec9fa6f2b
git.kernel.orghttps://git.kernel.org/stable/c/5f0419457f89dce1a3f1c8e62a3adf2f39ab8168

01 Record index

CVE-2026-64324

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2026-64324

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References