# ALSA-2022:0951: Security update for 2 packages

ALSA-2022:0951, released March 16, 2022, fixes 12 CVEs across 2 products. None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/alsa-2022-0951
- Platform: Linux
- Released: Mar 16, 2022
- Priority: High (Closes CVE-2022-25236, high severity)
- CVEs: 12, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://osv.dev/vulnerability/ALSA-2022:0951

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [expat](https://patchblox.com/security/data/product/linux/expat.md) | almalinux 8 | 2.2.5-8.el8_6.2 |
| [expat-devel](https://patchblox.com/security/data/product/linux/expat-devel.md) | almalinux 8 | 2.2.5-8.el8_6.2 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2022-25236](https://patchblox.com/security/data/cve/CVE-2022-25236.md) | High | libxmltok1: xmlparse.c in Expat (aka libexpat) before 2.4.5 allows attackers to insert namespace-separator characters into namesp... | 9.8 | 0.3527 |  |
| [CVE-2022-22822](https://patchblox.com/security/data/cve/CVE-2022-22822.md) | High | xul-ext-lightning: addBinding in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow. | 9.8 | 0.0548 |  |
| [CVE-2022-23852](https://patchblox.com/security/data/cve/CVE-2022-23852.md) | High | expat: Expat (aka libexpat) before 2.4.4 has a signed integer overflow inXML_GetBuffer, for configurations with a nonzero XM... | 9.8 | 0.0508 |  |
| [CVE-2022-25235](https://patchblox.com/security/data/cve/CVE-2022-25235.md) | High | libxmltok1: xmltok_impl.c in Expat (aka libexpat) before 2.4.5 lacks certain validation of encoding, such as checks for whether a... | 9.8 | 0.0496 |  |
| [CVE-2022-25315](https://patchblox.com/security/data/cve/CVE-2022-25315.md) | High | expat: In Expat (aka libexpat) before 2.4.5, there is an integer overflow in storeRawNames. | 9.8 | 0.0482 |  |
| [CVE-2021-45960](https://patchblox.com/security/data/cve/CVE-2021-45960.md) | High | expat: In Expat (aka libexpat) before 2.4.3, a left shift by 29 (or more) placesin the storeAtts function in xmlparse.c can... | 9.8 | 0.0467 |  |
| [CVE-2021-46143](https://patchblox.com/security/data/cve/CVE-2021-46143.md) | High | expat: In doProlog in xmlparse.c in Expat (aka libexpat) before 2.4.3, an integeroverflow exists for m_groupSize. | 9.8 | 0.0447 |  |
| [CVE-2022-22823](https://patchblox.com/security/data/cve/CVE-2022-22823.md) | High | thunderbird-mozsymbols: build_model in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow. | 9.8 | 0.0387 |  |
| [CVE-2022-22824](https://patchblox.com/security/data/cve/CVE-2022-22824.md) | High | expat: defineAttribute in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow. | 9.8 | 0.0387 |  |
| [CVE-2022-22826](https://patchblox.com/security/data/cve/CVE-2022-22826.md) | High | libxmltok1: nextScaffoldPart in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow. | 9.8 | 0.0318 |  |
| [CVE-2022-22827](https://patchblox.com/security/data/cve/CVE-2022-22827.md) | High | thunderbird-gnome-support: storeAtts in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow. | 9.8 | 0.0318 |  |
| [CVE-2022-22825](https://patchblox.com/security/data/cve/CVE-2022-22825.md) | High | libxmltok1: lookup in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow. | 9.8 | 0.0299 |  |

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Data as of 2026-11-07T12:40:37Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo