# CVE-2023-49298: libnvpair3linux: OpenZFS through 2.1.13 and 2.2.x through 2.2.1, in certain scenariosinvolving applications that try to rely on effici...

CVE-2023-49298 is fixed in 20 products on 1 platform, first by libnvpair1linux 0.8.3-1ubuntu12.17, released November 24, 2023. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2023-49298
- Priority: High
- CVSS: 7.5 (Medium)
- EPSS: 0.0116
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Nov 24, 2023

## Description

OpenZFS through 2.1.13 and 2.2.x through 2.2.1, in certain scenariosinvolving applications that try to rely on efficient copying of file data,can replace file contents with zero-valued bytes and thus potentiallydisable security mechanisms. NOTE: this issue is not always securityrelated, but can be security related in realistic situations. A possibleexample is cp, from a recent GNU Core Utilities (coreutils) version, whenattempting to preserve a rule set for denying unauthorized access. (Onemight use cp when configuring access control, such as with the/etc/hosts.deny file specified in the IBM Support reference.) NOTE: thisissue occurs less often in version 2.2.1, and in versions before 2.1.4,because of the default configuration in those versions.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libnvpair1linux Ubuntu 20.04 LTS (focal) | 0.8.3-1ubuntu12.17 | [libnvpair1linux 0.8.3-1ubuntu12.17](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libnvpair1linux-0.8.3-1ubuntu12.17.md) | Nov 24, 2023 |
| Linux | libnvpair3linux Ubuntu 22.04.1 LTS (jammy) | 2.1.5-1ubuntu6~22.04.4 | [libnvpair3linux 2.1.5-1ubuntu6~22.04.4](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libnvpair3linux-2.1.5-1ubuntu6-22.04.4.md) | Nov 24, 2023 |
| Linux | libnvpair3linux Ubuntu 24.04.5 LTS (noble) | 2.2.2-0ubuntu2 | [libnvpair3linux 2.2.2-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libnvpair3linux-2.2.2-0ubuntu2.md) | Nov 24, 2023 |
| Linux | libnvpair3linux Ubuntu 24.10 (oracular) | 2.2.2-0ubuntu2 | [libnvpair3linux 2.2.2-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-libnvpair3linux-2.2.2-0ubuntu2.md) | Jan 16, 2026 |
| Linux | libnvpair3linux Ubuntu 25.04 (plucky) | 2.2.2-0ubuntu2 | [libnvpair3linux 2.2.2-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-libnvpair3linux-2.2.2-0ubuntu2.md) | Jan 16, 2026 |
| Linux | libpam-zfs Ubuntu 22.04.1 LTS (jammy) | 2.1.5-1ubuntu6~22.04.4 | [libpam-zfs 2.1.5-1ubuntu6~22.04.4](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libpam-zfs-2.1.5-1ubuntu6-22.04.4.md) | Nov 24, 2023 |
| Linux | libpam-zfs Ubuntu 24.04.5 LTS (noble) | 2.2.2-0ubuntu2 | [libpam-zfs 2.2.2-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libpam-zfs-2.2.2-0ubuntu2.md) | Nov 24, 2023 |
| Linux | libpam-zfs Ubuntu 24.10 (oracular) | 2.2.2-0ubuntu2 | [libpam-zfs 2.2.2-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-libpam-zfs-2.2.2-0ubuntu2.md) | Jan 16, 2026 |
| Linux | libpam-zfs Ubuntu 25.04 (plucky) | 2.2.2-0ubuntu2 | [libpam-zfs 2.2.2-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-libpam-zfs-2.2.2-0ubuntu2.md) | Jan 16, 2026 |
| Linux | libuutil1linux Ubuntu 20.04 LTS (focal) | 0.8.3-1ubuntu12.17 | [libuutil1linux 0.8.3-1ubuntu12.17](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libuutil1linux-0.8.3-1ubuntu12.17.md) | Nov 24, 2023 |
| Linux | libuutil3linux Ubuntu 22.04.1 LTS (jammy) | 2.1.5-1ubuntu6~22.04.4 | [libuutil3linux 2.1.5-1ubuntu6~22.04.4](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libuutil3linux-2.1.5-1ubuntu6-22.04.4.md) | Nov 24, 2023 |
| Linux | libuutil3linux Ubuntu 24.04.5 LTS (noble) | 2.2.2-0ubuntu2 | [libuutil3linux 2.2.2-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libuutil3linux-2.2.2-0ubuntu2.md) | Nov 24, 2023 |
| Linux | libuutil3linux Ubuntu 24.10 (oracular) | 2.2.2-0ubuntu2 | [libuutil3linux 2.2.2-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-libuutil3linux-2.2.2-0ubuntu2.md) | Jan 16, 2026 |
| Linux | libuutil3linux Ubuntu 25.04 (plucky) | 2.2.2-0ubuntu2 | [libuutil3linux 2.2.2-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-libuutil3linux-2.2.2-0ubuntu2.md) | Jan 16, 2026 |
| Linux | libzfs2linux Ubuntu 20.04 LTS (focal) | 0.8.3-1ubuntu12.17 | [libzfs2linux 0.8.3-1ubuntu12.17](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libzfs2linux-0.8.3-1ubuntu12.17.md) | Nov 24, 2023 |
| Linux | libzfs4linux Ubuntu 22.04.1 LTS (jammy) | 2.1.5-1ubuntu6~22.04.4 | [libzfs4linux 2.1.5-1ubuntu6~22.04.4](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libzfs4linux-2.1.5-1ubuntu6-22.04.4.md) | Nov 24, 2023 |
| Linux | libzfs4linux Ubuntu 24.04.5 LTS (noble) | 2.2.2-0ubuntu2 | [libzfs4linux 2.2.2-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libzfs4linux-2.2.2-0ubuntu2.md) | Nov 24, 2023 |
| Linux | libzfs4linux Ubuntu 24.10 (oracular) | 2.2.2-0ubuntu2 | [libzfs4linux 2.2.2-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-libzfs4linux-2.2.2-0ubuntu2.md) | Jan 16, 2026 |
| Linux | libzfs4linux Ubuntu 25.04 (plucky) | 2.2.2-0ubuntu2 | [libzfs4linux 2.2.2-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-libzfs4linux-2.2.2-0ubuntu2.md) | Jan 16, 2026 |
| Linux | libzfsbootenv1linux Ubuntu 22.04.1 LTS (jammy) | 2.1.5-1ubuntu6~22.04.4 | [libzfsbootenv1linux 2.1.5-1ubuntu6~22.04.4](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libzfsbootenv1linux-2.1.5-1ubuntu6-22.04.4.md) | Nov 24, 2023 |
| Linux | libzfsbootenv1linux Ubuntu 24.04.5 LTS (noble) | 2.2.2-0ubuntu2 | [libzfsbootenv1linux 2.2.2-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libzfsbootenv1linux-2.2.2-0ubuntu2.md) | Nov 24, 2023 |
| Linux | libzfsbootenv1linux Ubuntu 24.10 (oracular) | 2.2.2-0ubuntu2 | [libzfsbootenv1linux 2.2.2-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-libzfsbootenv1linux-2.2.2-0ubuntu2.md) | Jan 16, 2026 |
| Linux | libzfsbootenv1linux Ubuntu 25.04 (plucky) | 2.2.2-0ubuntu2 | [libzfsbootenv1linux 2.2.2-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-libzfsbootenv1linux-2.2.2-0ubuntu2.md) | Jan 16, 2026 |
| Linux | libzpool2linux Ubuntu 20.04 LTS (focal) | 0.8.3-1ubuntu12.17 | [libzpool2linux 0.8.3-1ubuntu12.17](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libzpool2linux-0.8.3-1ubuntu12.17.md) | Nov 24, 2023 |
| Linux | libzpool5linux Ubuntu 22.04.1 LTS (jammy) | 2.1.5-1ubuntu6~22.04.4 | [libzpool5linux 2.1.5-1ubuntu6~22.04.4](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libzpool5linux-2.1.5-1ubuntu6-22.04.4.md) | Nov 24, 2023 |
| Linux | libzpool5linux Ubuntu 24.04.5 LTS (noble) | 2.2.2-0ubuntu2 | [libzpool5linux 2.2.2-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libzpool5linux-2.2.2-0ubuntu2.md) | Nov 24, 2023 |
| Linux | libzpool5linux Ubuntu 24.10 (oracular) | 2.2.2-0ubuntu2 | [libzpool5linux 2.2.2-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-libzpool5linux-2.2.2-0ubuntu2.md) | Jan 16, 2026 |
| Linux | libzpool5linux Ubuntu 25.04 (plucky) | 2.2.2-0ubuntu2 | [libzpool5linux 2.2.2-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-libzpool5linux-2.2.2-0ubuntu2.md) | Jan 16, 2026 |
| Linux | python3-pyzfs Ubuntu 20.04 LTS (focal) | 0.8.3-1ubuntu12.17 | [python3-pyzfs 0.8.3-1ubuntu12.17](https://patchblox.com/security/data/fix/linux/ubuntu-focal-python3-pyzfs-0.8.3-1ubuntu12.17.md) | Nov 24, 2023 |
| Linux | python3-pyzfs Ubuntu 22.04.1 LTS (jammy) | 2.1.5-1ubuntu6~22.04.4 | [python3-pyzfs 2.1.5-1ubuntu6~22.04.4](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-python3-pyzfs-2.1.5-1ubuntu6-22.04.4.md) | Nov 24, 2023 |
| Linux | python3-pyzfs Ubuntu 24.04.5 LTS (noble) | 2.2.2-0ubuntu2 | [python3-pyzfs 2.2.2-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-noble-python3-pyzfs-2.2.2-0ubuntu2.md) | Nov 24, 2023 |
| Linux | python3-pyzfs Ubuntu 24.10 (oracular) | 2.2.2-0ubuntu2 | [python3-pyzfs 2.2.2-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-python3-pyzfs-2.2.2-0ubuntu2.md) | Jan 16, 2026 |
| Linux | python3-pyzfs Ubuntu 25.04 (plucky) | 2.2.2-0ubuntu2 | [python3-pyzfs 2.2.2-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-python3-pyzfs-2.2.2-0ubuntu2.md) | Jan 16, 2026 |
| Linux | spl Ubuntu 20.04 LTS (focal) | 0.8.3-1ubuntu12.17 | [spl 0.8.3-1ubuntu12.17](https://patchblox.com/security/data/fix/linux/ubuntu-focal-spl-0.8.3-1ubuntu12.17.md) | Nov 24, 2023 |
| Linux | spl-dkms Ubuntu 20.04 LTS (focal) | 0.8.3-1ubuntu12.17 | [spl-dkms 0.8.3-1ubuntu12.17](https://patchblox.com/security/data/fix/linux/ubuntu-focal-spl-dkms-0.8.3-1ubuntu12.17.md) | Nov 24, 2023 |
| Linux | zfs-dkms Ubuntu 20.04 LTS (focal) | 0.8.3-1ubuntu12.17 | [zfs-dkms 0.8.3-1ubuntu12.17](https://patchblox.com/security/data/fix/linux/ubuntu-focal-zfs-dkms-0.8.3-1ubuntu12.17.md) | Nov 24, 2023 |
| Linux | zfs-dkms Ubuntu 22.04.1 LTS (jammy) | 2.1.5-1ubuntu6~22.04.4 | [zfs-dkms 2.1.5-1ubuntu6~22.04.4](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-zfs-dkms-2.1.5-1ubuntu6-22.04.4.md) | Nov 24, 2023 |
| Linux | zfs-dkms Ubuntu 24.04.5 LTS (noble) | 2.2.2-0ubuntu2 | [zfs-dkms 2.2.2-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-noble-zfs-dkms-2.2.2-0ubuntu2.md) | Nov 24, 2023 |
| Linux | zfs-dkms Ubuntu 24.10 (oracular) | 2.2.2-0ubuntu2 | [zfs-dkms 2.2.2-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-zfs-dkms-2.2.2-0ubuntu2.md) | Jan 16, 2026 |
| Linux | zfs-dkms Ubuntu 25.04 (plucky) | 2.2.2-0ubuntu2 | [zfs-dkms 2.2.2-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-zfs-dkms-2.2.2-0ubuntu2.md) | Jan 16, 2026 |
| Linux | zfs-dracut Ubuntu 20.04 LTS (focal) | 0.8.3-1ubuntu12.17 | [zfs-dracut 0.8.3-1ubuntu12.17](https://patchblox.com/security/data/fix/linux/ubuntu-focal-zfs-dracut-0.8.3-1ubuntu12.17.md) | Nov 24, 2023 |
| Linux | zfs-dracut Ubuntu 22.04.1 LTS (jammy) | 2.1.5-1ubuntu6~22.04.4 | [zfs-dracut 2.1.5-1ubuntu6~22.04.4](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-zfs-dracut-2.1.5-1ubuntu6-22.04.4.md) | Nov 24, 2023 |
| Linux | zfs-dracut Ubuntu 24.04.5 LTS (noble) | 2.2.2-0ubuntu2 | [zfs-dracut 2.2.2-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-noble-zfs-dracut-2.2.2-0ubuntu2.md) | Nov 24, 2023 |
| Linux | zfs-dracut Ubuntu 24.10 (oracular) | 2.2.2-0ubuntu2 | [zfs-dracut 2.2.2-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-zfs-dracut-2.2.2-0ubuntu2.md) | Jan 16, 2026 |
| Linux | zfs-dracut Ubuntu 25.04 (plucky) | 2.2.2-0ubuntu2 | [zfs-dracut 2.2.2-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-zfs-dracut-2.2.2-0ubuntu2.md) | Jan 16, 2026 |
| Linux | zfs-initramfs Ubuntu 20.04 LTS (focal) | 0.8.3-1ubuntu12.17 | [zfs-initramfs 0.8.3-1ubuntu12.17](https://patchblox.com/security/data/fix/linux/ubuntu-focal-zfs-initramfs-0.8.3-1ubuntu12.17.md) | Nov 24, 2023 |
| Linux | zfs-initramfs Ubuntu 22.04.1 LTS (jammy) | 2.1.5-1ubuntu6~22.04.4 | [zfs-initramfs 2.1.5-1ubuntu6~22.04.4](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-zfs-initramfs-2.1.5-1ubuntu6-22.04.4.md) | Nov 24, 2023 |
| Linux | zfs-initramfs Ubuntu 24.04.5 LTS (noble) | 2.2.2-0ubuntu2 | [zfs-initramfs 2.2.2-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-noble-zfs-initramfs-2.2.2-0ubuntu2.md) | Nov 24, 2023 |
| Linux | zfs-initramfs Ubuntu 24.10 (oracular) | 2.2.2-0ubuntu2 | [zfs-initramfs 2.2.2-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-zfs-initramfs-2.2.2-0ubuntu2.md) | Jan 16, 2026 |
| Linux | zfs-initramfs Ubuntu 25.04 (plucky) | 2.2.2-0ubuntu2 | [zfs-initramfs 2.2.2-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-zfs-initramfs-2.2.2-0ubuntu2.md) | Jan 16, 2026 |
| Linux | zfs-linux Debian 12.15 (bookworm) | 2.1.11-1+deb12u1 | [DEBIAN-CVE-2023-49298](https://patchblox.com/security/data/fix/linux/debian-cve-2023-49298.md) | Nov 24, 2023 |
| Linux | zfs-linux Debian 13.5 (trixie) | 2.1.14-1 | [DEBIAN-CVE-2023-49298](https://patchblox.com/security/data/fix/linux/debian-cve-2023-49298.md) | Nov 24, 2023 |
| Linux | zfs-linux Debian 14 | 2.1.14-1 | [DEBIAN-CVE-2023-49298](https://patchblox.com/security/data/fix/linux/debian-cve-2023-49298.md) | Nov 24, 2023 |
| Linux | zfs-test Ubuntu 20.04 LTS (focal) | 0.8.3-1ubuntu12.17 | [zfs-test 0.8.3-1ubuntu12.17](https://patchblox.com/security/data/fix/linux/ubuntu-focal-zfs-test-0.8.3-1ubuntu12.17.md) | Nov 24, 2023 |
| Linux | zfs-test Ubuntu 22.04.1 LTS (jammy) | 2.1.5-1ubuntu6~22.04.4 | [zfs-test 2.1.5-1ubuntu6~22.04.4](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-zfs-test-2.1.5-1ubuntu6-22.04.4.md) | Nov 24, 2023 |
| Linux | zfs-test Ubuntu 24.04.5 LTS (noble) | 2.2.2-0ubuntu2 | [zfs-test 2.2.2-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-noble-zfs-test-2.2.2-0ubuntu2.md) | Nov 24, 2023 |
| Linux | zfs-test Ubuntu 24.10 (oracular) | 2.2.2-0ubuntu2 | [zfs-test 2.2.2-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-zfs-test-2.2.2-0ubuntu2.md) | Jan 16, 2026 |
| Linux | zfs-test Ubuntu 25.04 (plucky) | 2.2.2-0ubuntu2 | [zfs-test 2.2.2-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-zfs-test-2.2.2-0ubuntu2.md) | Jan 16, 2026 |
| Linux | zfs-zed Ubuntu 20.04 LTS (focal) | 0.8.3-1ubuntu12.17 | [zfs-zed 0.8.3-1ubuntu12.17](https://patchblox.com/security/data/fix/linux/ubuntu-focal-zfs-zed-0.8.3-1ubuntu12.17.md) | Nov 24, 2023 |
| Linux | zfs-zed Ubuntu 22.04.1 LTS (jammy) | 2.1.5-1ubuntu6~22.04.4 | [zfs-zed 2.1.5-1ubuntu6~22.04.4](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-zfs-zed-2.1.5-1ubuntu6-22.04.4.md) | Nov 24, 2023 |
| Linux | zfs-zed Ubuntu 24.04.5 LTS (noble) | 2.2.2-0ubuntu2 | [zfs-zed 2.2.2-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-noble-zfs-zed-2.2.2-0ubuntu2.md) | Nov 24, 2023 |
| Linux | zfs-zed Ubuntu 24.10 (oracular) | 2.2.2-0ubuntu2 | [zfs-zed 2.2.2-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-zfs-zed-2.2.2-0ubuntu2.md) | Jan 16, 2026 |
| Linux | zfs-zed Ubuntu 25.04 (plucky) | 2.2.2-0ubuntu2 | [zfs-zed 2.2.2-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-zfs-zed-2.2.2-0ubuntu2.md) | Jan 16, 2026 |
| Linux | zfsutils-linux Ubuntu 20.04 LTS (focal) | 0.8.3-1ubuntu12.17 | [zfsutils-linux 0.8.3-1ubuntu12.17](https://patchblox.com/security/data/fix/linux/ubuntu-focal-zfsutils-linux-0.8.3-1ubuntu12.17.md) | Nov 24, 2023 |
| Linux | zfsutils-linux Ubuntu 22.04.1 LTS (jammy) | 2.1.5-1ubuntu6~22.04.4 | [zfsutils-linux 2.1.5-1ubuntu6~22.04.4](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-zfsutils-linux-2.1.5-1ubuntu6-22.04.4.md) | Nov 24, 2023 |
| Linux | zfsutils-linux Ubuntu 24.04.5 LTS (noble) | 2.2.2-0ubuntu2 | [zfsutils-linux 2.2.2-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-noble-zfsutils-linux-2.2.2-0ubuntu2.md) | Nov 24, 2023 |
| Linux | zfsutils-linux Ubuntu 24.10 (oracular) | 2.2.2-0ubuntu2 | [zfsutils-linux 2.2.2-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-zfsutils-linux-2.2.2-0ubuntu2.md) | Jan 16, 2026 |
| Linux | zfsutils-linux Ubuntu 25.04 (plucky) | 2.2.2-0ubuntu2 | [zfsutils-linux 2.2.2-0ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-zfsutils-linux-2.2.2-0ubuntu2.md) | Jan 16, 2026 |

---

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