In NTFS-3G before 2026.7.7, a heap buffer overflow exists in ntfs_decompress() in compress.c that allows an attacker to corrupt one byte of heap memory in the SUID-root ntfs-3g binary by crafting a malicious NTFS image. The overflow is triggered by reading the special crafted file.
CVE-2026-42618 is fixed in 4 products on 1 platform, first by libntfs-3g89t64 1:2022.10.3-5ubuntu1.1, released July 15, 2026. It is not reported as exploited. Patch Radar priority: High.
In NTFS-3G before 2026.7.7, a heap buffer overflow exists in ntfs_decompress() in compress.c that allows an attacker to corrupt one byte of heap memory in the SUID-root ntfs-3g binary by crafting a malicious NTFS image. The overflow is triggered by reading the special crafted file.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| libntfs-3g89 · Ubuntu 22.04.1 LTS (jammy) | 1:2021.8.22-3ubuntu1.4 | libntfs-3g89 1:2021.8.22-3ubuntu1.4 | Jul 18, 2026 |
| libntfs-3g89t64 · Ubuntu 24.04.5 LTS (noble) | 1:2022.10.3-1.2ubuntu3.2 | libntfs-3g89t64 1:2022.10.3-1.2ubuntu3.2 | Jul 18, 2026 |
| libntfs-3g89t64 · Ubuntu 26.04.1 LTS (resolute) | 1:2022.10.3-5ubuntu1.1 | libntfs-3g89t64 1:2022.10.3-5ubuntu1.1 | Jul 15, 2026 |
| ntfs-3g · Debian 12.15 (bookworm) | 1:2022.10.3-1+deb12u4 | DEBIAN-CVE-2026-42618 | Jul 18, 2026 |
| ntfs-3g · Debian 13.5 (trixie) | 1:2022.10.3-5+deb13u2 | DEBIAN-CVE-2026-42618 | Jul 18, 2026 |
| ntfs-3g · Debian 14 | 1:2026.7.7-2 | DEBIAN-CVE-2026-42618 | Jul 18, 2026 |
| ntfs-3g · Ubuntu 22.04.1 LTS (jammy) | 1:2021.8.22-3ubuntu1.4 | ntfs-3g 1:2021.8.22-3ubuntu1.4 | Jul 18, 2026 |
| ntfs-3g · Ubuntu 24.04.5 LTS (noble) | 1:2022.10.3-1.2ubuntu3.2 | ntfs-3g 1:2022.10.3-1.2ubuntu3.2 | Jul 18, 2026 |
| ntfs-3g · Ubuntu 26.04.1 LTS (resolute) | 1:2022.10.3-5ubuntu1.1 | ntfs-3g 1:2022.10.3-5ubuntu1.1 | Jul 15, 2026 |
| ntfs-3g_ntfsprogs · opensuse-leap 16.0 | 2022.10.3-160000.4.1 | OPENSUSE-SU-2026:21484-1 | Jul 30, 2026 |
| ntfs-3g_ntfsprogs · sles 15.6 | 2022.5.17-150000.3.27.1 | SUSE-SU-2026:3214-1 | Jul 23, 2026 |
| ntfs-3g_ntfsprogs · sles 15.7 | 2022.5.17-150000.3.27.1 | SUSE-SU-2026:3214-1 | Jul 23, 2026 |
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