CVE-2026-64324

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: udf: validate free block extents against the partition length udf_free_blocks() checks the logical block number and count against the partition length, but drops the extent offset from that final bound. A crafted extent can pass the guard while logicalBlockNum + offset + count points past the partition, which later indexes past the space bitmap array. A single ftruncate(2) on a file backed by such an extent reliably panics the kernel. This is a local availability issue. On desktop systems where UDisks/polkit allows the acti...

Affected product and versions

Product

Linux

Affected versions

>= 934f815345c09c290a9b9a9cfdddc203ec2117e8 < fdd6229d2ae9914c1f25d1041db0f4f312a4fa76, >= 22cc7323f090646c8cfb5939e6f15bdc2ed3fd27 < b54aee5652fcd7c23a0904a4623ec462c3edc70c, >= 7c4fa9ebfce69619d132fe703dc2e2cf62a13723 < 12af328d2ee8d68e81ba612246d0b54b22d23e1f, >= 5cc9745e2ea11aef7d5c9a42bc36f6cd3e1b4cc3 < fb49099206c5c57af28a157249fa7bcb5518f99e, >= 56e69e59751d20993f243fb7dd6991c4e522424c < 9442d75429b0c556292a7454fe888d54259f5240, >= 56e69e59751d20993f243fb7dd6991c4e522424c < 335202ab25b01fdd45889ff25eab70864686dea3, >= 56e69e59751d20993f243fb7dd6991c4e522424c < be87de7789a82a030a4896bc7683415ec9fa6f2b, >= 56e69e59751d20993f243fb7dd6991c4e522424c < 5f0419457f89dce1a3f1c8e62a3adf2f39ab8168, >= 097420e48e30f51e8f4f650b5c946f5af63ec1a3, >= 5def895b42ef16a2da6402818cba8d7ec8ede1ef, >= 05fb2bf477d3fe5421bd4cb699574737f52bd88b, >= 5.10.224 < 5.10.261, >= 5.15.165 < 5.15.212, >= 6.1.105 < 6.1.178, >= 6.6.46 < 6.6.145, >= 4.19.320 < 4.20, >= 5.4.282 < 5.5, >= 6.10.5 < 6.11, >= 6.11

Fixed versions

No verified fixed-version field is available yet

Technical data

CVSS vector

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

CWE

Not available