# CVE-2022-29824: libxml2: In libxml2 before 2.9.14, several buffer handling functions in buf.c (xmlBuf*) and tree.c (xmlBuffer*) don't check fo...

CVE-2022-29824 is fixed in 9 products on 1 platform, first by libxml2 2.9.4+dfsg1-6.1ubuntu1.6, released May 2, 2022. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2022-29824
- Priority: High
- CVSS: 7.4 (Medium)
- EPSS: 0.0375
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 2, 2022

## Description

In libxml2 before 2.9.14, several buffer handling functions in buf.c (xmlBuf*) and tree.c (xmlBuffer*) don't check for integer overflows. This can result in out-of-bounds memory writes. Exploitation requires a victim to open a crafted, multi-gigabyte XML file. Other software using libxml2's buffer functions, for example libxslt through 1.1.35, is affected as well.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libxml2 Debian 11.6 (bullseye) | 2.9.10+dfsg-6.7+deb11u2 | [DSA-5142-1](https://patchblox.com/security/data/fix/linux/dsa-5142-1.md) | May 22, 2022 |
| Linux | libxml2 Debian 12.15 (bookworm) | 2.9.14+dfsg-1 | [DEBIAN-CVE-2022-29824](https://patchblox.com/security/data/fix/linux/debian-cve-2022-29824.md) | May 3, 2022 |
| Linux | libxml2 Debian 13.5 (trixie) | 2.9.14+dfsg-1 | [DEBIAN-CVE-2022-29824](https://patchblox.com/security/data/fix/linux/debian-cve-2022-29824.md) | May 3, 2022 |
| Linux | libxml2 Debian 14 | 2.9.14+dfsg-1 | [DEBIAN-CVE-2022-29824](https://patchblox.com/security/data/fix/linux/debian-cve-2022-29824.md) | May 3, 2022 |
| Linux | libxml2 RHEL 8 | 0:2.9.7-13.el8_6.1 | [RHSA-2022:5317](https://patchblox.com/security/data/fix/linux/rhsa-2022-5317.md) | Jun 30, 2022 |
| Linux | libxml2 RHEL 9 | 0:2.9.13-1.el9_0.1 | [RHSA-2022:5250](https://patchblox.com/security/data/fix/linux/rhsa-2022-5250.md) | Jul 1, 2022 |
| Linux | libxml2 Ubuntu 18.04.6 LTS (bionic) | 2.9.4+dfsg1-6.1ubuntu1.6 | [libxml2 2.9.4+dfsg1-6.1ubuntu1.6](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libxml2-2.9.4-dfsg1-6.1ubuntu1.6.md) | May 2, 2022 |
| Linux | libxml2 Ubuntu 20.04 LTS (focal) | 2.9.10+dfsg-5ubuntu0.20.04.3 | [libxml2 2.9.10+dfsg-5ubuntu0.20.04.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libxml2-2.9.10-dfsg-5ubuntu0.20.04.3.md) | May 2, 2022 |
| Linux | libxml2 Ubuntu 22.04.1 LTS (jammy) | 2.9.13+dfsg-1ubuntu0.1 | [libxml2 2.9.13+dfsg-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libxml2-2.9.13-dfsg-1ubuntu0.1.md) | May 2, 2022 |
| Linux | libxml2 amzn 2023 | 2.10.3-2.amzn2023.0.1 | [ALAS2023-2023-096](https://patchblox.com/security/data/fix/linux/alas2023-2023-096.md) | Feb 17, 2023 |
| Linux | libxml2 ol 8 | 0:2.9.7-13.el8_6.1 | [ELSA-2022-5317](https://patchblox.com/security/data/fix/linux/elsa-2022-5317.md) | Jul 1, 2022 |
| Linux | libxml2 ol 9 | 0:2.9.13-1.el9_0.1 | [ELSA-2022-5250](https://patchblox.com/security/data/fix/linux/elsa-2022-5250.md) | Jun 30, 2022 |
| Linux | libxml2 rocky 8 | 0:2.9.7-13.el8_6.1 | [RLSA-2022:5317](https://patchblox.com/security/data/fix/linux/rlsa-2022-5317.md) | Jun 28, 2022 |
| Linux | libxml2 rocky 9 | 0:2.9.13-1.el9_0.1 | [RLSA-2022:5250](https://patchblox.com/security/data/fix/linux/rlsa-2022-5250.md) | Jun 28, 2022 |
| Linux | libxml2-debuginfo amzn 2023 | 2.10.3-2.amzn2023.0.1 | [ALAS2023-2023-096](https://patchblox.com/security/data/fix/linux/alas2023-2023-096.md) | Feb 17, 2023 |
| Linux | libxml2-debugsource amzn 2023 | 2.10.3-2.amzn2023.0.1 | [ALAS2023-2023-096](https://patchblox.com/security/data/fix/linux/alas2023-2023-096.md) | Feb 17, 2023 |
| Linux | libxml2-devel RHEL 8 | 0:2.9.7-13.el8_6.1 | [RHSA-2022:5317](https://patchblox.com/security/data/fix/linux/rhsa-2022-5317.md) | Jun 30, 2022 |
| Linux | libxml2-devel RHEL 9 | 0:2.9.13-1.el9_0.1 | [RHSA-2022:5250](https://patchblox.com/security/data/fix/linux/rhsa-2022-5250.md) | Jul 1, 2022 |
| Linux | libxml2-devel amzn 2023 | 2.10.3-2.amzn2023.0.1 | [ALAS2023-2023-096](https://patchblox.com/security/data/fix/linux/alas2023-2023-096.md) | Feb 17, 2023 |
| Linux | libxml2-devel ol 8 | 0:2.9.7-13.el8_6.1 | [ELSA-2022-5317](https://patchblox.com/security/data/fix/linux/elsa-2022-5317.md) | Jul 1, 2022 |
| Linux | libxml2-devel ol 9 | 0:2.9.13-1.el9_0.1 | [ELSA-2022-5250](https://patchblox.com/security/data/fix/linux/elsa-2022-5250.md) | Jun 30, 2022 |
| Linux | libxml2-static amzn 2023 | 2.10.3-2.amzn2023.0.1 | [ALAS2023-2023-096](https://patchblox.com/security/data/fix/linux/alas2023-2023-096.md) | Feb 17, 2023 |
| Linux | libxml2-utils Ubuntu 18.04.6 LTS (bionic) | 2.9.4+dfsg1-6.1ubuntu1.6 | [libxml2-utils 2.9.4+dfsg1-6.1ubuntu1.6](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libxml2-utils-2.9.4-dfsg1-6.1ubuntu1.6.md) | May 2, 2022 |
| Linux | libxml2-utils Ubuntu 20.04 LTS (focal) | 2.9.10+dfsg-5ubuntu0.20.04.3 | [libxml2-utils 2.9.10+dfsg-5ubuntu0.20.04.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libxml2-utils-2.9.10-dfsg-5ubuntu0.20.04.3.md) | May 2, 2022 |
| Linux | libxml2-utils Ubuntu 22.04.1 LTS (jammy) | 2.9.13+dfsg-1ubuntu0.1 | [libxml2-utils 2.9.13+dfsg-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libxml2-utils-2.9.13-dfsg-1ubuntu0.1.md) | May 2, 2022 |
| Linux | python-libxml2 Ubuntu 18.04.6 LTS (bionic) | 2.9.4+dfsg1-6.1ubuntu1.6 | [python-libxml2 2.9.4+dfsg1-6.1ubuntu1.6](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python-libxml2-2.9.4-dfsg1-6.1ubuntu1.6.md) | May 2, 2022 |
| Linux | python-libxml2 Ubuntu 20.04 LTS (focal) | 2.9.10+dfsg-5ubuntu0.20.04.3 | [python-libxml2 2.9.10+dfsg-5ubuntu0.20.04.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-python-libxml2-2.9.10-dfsg-5ubuntu0.20.04.3.md) | May 2, 2022 |
| Linux | python3-libxml2 RHEL 8 | 0:2.9.7-13.el8_6.1 | [RHSA-2022:5317](https://patchblox.com/security/data/fix/linux/rhsa-2022-5317.md) | Jun 30, 2022 |
| Linux | python3-libxml2 RHEL 9 | 0:2.9.13-1.el9_0.1 | [RHSA-2022:5250](https://patchblox.com/security/data/fix/linux/rhsa-2022-5250.md) | Jul 1, 2022 |
| Linux | python3-libxml2 Ubuntu 18.04.6 LTS (bionic) | 2.9.4+dfsg1-6.1ubuntu1.6 | [python3-libxml2 2.9.4+dfsg1-6.1ubuntu1.6](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python3-libxml2-2.9.4-dfsg1-6.1ubuntu1.6.md) | May 2, 2022 |
| Linux | python3-libxml2 Ubuntu 20.04 LTS (focal) | 2.9.10+dfsg-5ubuntu0.20.04.3 | [python3-libxml2 2.9.10+dfsg-5ubuntu0.20.04.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-python3-libxml2-2.9.10-dfsg-5ubuntu0.20.04.3.md) | May 2, 2022 |
| Linux | python3-libxml2 Ubuntu 22.04.1 LTS (jammy) | 2.9.13+dfsg-1ubuntu0.1 | [python3-libxml2 2.9.13+dfsg-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-python3-libxml2-2.9.13-dfsg-1ubuntu0.1.md) | May 2, 2022 |
| Linux | python3-libxml2 amzn 2023 | 2.10.3-2.amzn2023.0.1 | [ALAS2023-2023-096](https://patchblox.com/security/data/fix/linux/alas2023-2023-096.md) | Feb 17, 2023 |
| Linux | python3-libxml2 ol 8 | 0:2.9.7-13.el8_6.1 | [ELSA-2022-5317](https://patchblox.com/security/data/fix/linux/elsa-2022-5317.md) | Jul 1, 2022 |
| Linux | python3-libxml2 ol 9 | 0:2.9.13-1.el9_0.1 | [ELSA-2022-5250](https://patchblox.com/security/data/fix/linux/elsa-2022-5250.md) | Jun 30, 2022 |
| Linux | python3-libxml2-debuginfo amzn 2023 | 2.10.3-2.amzn2023.0.1 | [ALAS2023-2023-096](https://patchblox.com/security/data/fix/linux/alas2023-2023-096.md) | Feb 17, 2023 |

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