# CVE-2022-49416: linux: In the Linux kernel, the following vulnerability has been resolved:  wifi: mac80211: fix use-after-free in chanctx co...

CVE-2022-49416 is fixed in 47 products on 1 platform, first by RHSA-2023:2458, released May 9, 2023. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2022-49416
- Priority: High
- CVSS: 8.8 (high)
- EPSS: 0.0034
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 9, 2023

## Description

In the Linux kernel, the following vulnerability has been resolved:  wifi: mac80211: fix use-after-free in chanctx code  In ieee80211_vif_use_reserved_context(), when we have an old context and the new context's replace_state is set to IEEE80211_CHANCTX_REPLACE_NONE, we free the old context in ieee80211_vif_use_reserved_reassign(). Therefore, we cannot check the old_ctx anymore, so we should set it to NULL after this point.  However, since the new_ctx replace state is clearly not IEEE80211_CHANCTX_REPLACES_OTHER, we're not going to do anything else in this function and can just return to avoid accessing the freed old_ctx.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | bpftool RHEL 8 | 0:4.18.0-477.10.1.el8_8 | [RHSA-2023:2951](https://patchblox.com/security/data/fix/linux/rhsa-2023-2951.md) | May 16, 2023 |
| Linux | bpftool RHEL 9 | 0:7.0.0-284.11.1.el9_2 | [RHSA-2023:2458](https://patchblox.com/security/data/fix/linux/rhsa-2023-2458.md) | May 9, 2023 |
| Linux | kernel RHEL 8 | 0:4.18.0-477.10.1.el8_8 | [RHSA-2023:2951](https://patchblox.com/security/data/fix/linux/rhsa-2023-2951.md) | May 16, 2023 |
| Linux | kernel RHEL 9 | 0:5.14.0-284.11.1.el9_2 | [RHSA-2023:2458](https://patchblox.com/security/data/fix/linux/rhsa-2023-2458.md) | May 9, 2023 |
| Linux | kernel-64k RHEL 9 | 0:5.14.0-284.11.1.el9_2 | [RHSA-2023:2458](https://patchblox.com/security/data/fix/linux/rhsa-2023-2458.md) | May 9, 2023 |
| Linux | kernel-64k-core RHEL 9 | 0:5.14.0-284.11.1.el9_2 | [RHSA-2023:2458](https://patchblox.com/security/data/fix/linux/rhsa-2023-2458.md) | May 9, 2023 |
| Linux | kernel-64k-debug RHEL 9 | 0:5.14.0-284.11.1.el9_2 | [RHSA-2023:2458](https://patchblox.com/security/data/fix/linux/rhsa-2023-2458.md) | May 9, 2023 |
| Linux | kernel-64k-debug-core RHEL 9 | 0:5.14.0-284.11.1.el9_2 | [RHSA-2023:2458](https://patchblox.com/security/data/fix/linux/rhsa-2023-2458.md) | May 9, 2023 |
| Linux | kernel-64k-debug-devel RHEL 9 | 0:5.14.0-284.11.1.el9_2 | [RHSA-2023:2458](https://patchblox.com/security/data/fix/linux/rhsa-2023-2458.md) | May 9, 2023 |
| Linux | kernel-64k-debug-devel-matched RHEL 9 | 0:5.14.0-284.11.1.el9_2 | [RHSA-2023:2458](https://patchblox.com/security/data/fix/linux/rhsa-2023-2458.md) | May 9, 2023 |
| Linux | kernel-64k-debug-modules RHEL 9 | 0:5.14.0-284.11.1.el9_2 | [RHSA-2023:2458](https://patchblox.com/security/data/fix/linux/rhsa-2023-2458.md) | May 9, 2023 |
| Linux | kernel-64k-debug-modules-core RHEL 9 | 0:5.14.0-284.11.1.el9_2 | [RHSA-2023:2458](https://patchblox.com/security/data/fix/linux/rhsa-2023-2458.md) | May 9, 2023 |
| Linux | kernel-64k-debug-modules-extra RHEL 9 | 0:5.14.0-284.11.1.el9_2 | [RHSA-2023:2458](https://patchblox.com/security/data/fix/linux/rhsa-2023-2458.md) | May 9, 2023 |
| Linux | kernel-64k-devel RHEL 9 | 0:5.14.0-284.11.1.el9_2 | [RHSA-2023:2458](https://patchblox.com/security/data/fix/linux/rhsa-2023-2458.md) | May 9, 2023 |
| Linux | kernel-64k-devel-matched RHEL 9 | 0:5.14.0-284.11.1.el9_2 | [RHSA-2023:2458](https://patchblox.com/security/data/fix/linux/rhsa-2023-2458.md) | May 9, 2023 |
| Linux | kernel-64k-modules RHEL 9 | 0:5.14.0-284.11.1.el9_2 | [RHSA-2023:2458](https://patchblox.com/security/data/fix/linux/rhsa-2023-2458.md) | May 9, 2023 |
| Linux | kernel-64k-modules-core RHEL 9 | 0:5.14.0-284.11.1.el9_2 | [RHSA-2023:2458](https://patchblox.com/security/data/fix/linux/rhsa-2023-2458.md) | May 9, 2023 |
| Linux | kernel-64k-modules-extra RHEL 9 | 0:5.14.0-284.11.1.el9_2 | [RHSA-2023:2458](https://patchblox.com/security/data/fix/linux/rhsa-2023-2458.md) | May 9, 2023 |
| Linux | kernel-abi-stablelists RHEL 8 | 0:4.18.0-477.10.1.el8_8 | [RHSA-2023:2951](https://patchblox.com/security/data/fix/linux/rhsa-2023-2951.md) | May 16, 2023 |
| Linux | kernel-abi-stablelists RHEL 9 | 0:5.14.0-284.11.1.el9_2 | [RHSA-2023:2458](https://patchblox.com/security/data/fix/linux/rhsa-2023-2458.md) | May 9, 2023 |
| Linux | kernel-core RHEL 8 | 0:4.18.0-477.10.1.el8_8 | [RHSA-2023:2951](https://patchblox.com/security/data/fix/linux/rhsa-2023-2951.md) | May 16, 2023 |
| Linux | kernel-core RHEL 9 | 0:5.14.0-284.11.1.el9_2 | [RHSA-2023:2458](https://patchblox.com/security/data/fix/linux/rhsa-2023-2458.md) | May 9, 2023 |
| Linux | kernel-debug RHEL 8 | 0:4.18.0-477.10.1.el8_8 | [RHSA-2023:2951](https://patchblox.com/security/data/fix/linux/rhsa-2023-2951.md) | May 16, 2023 |
| Linux | kernel-debug RHEL 9 | 0:5.14.0-284.11.1.el9_2 | [RHSA-2023:2458](https://patchblox.com/security/data/fix/linux/rhsa-2023-2458.md) | May 9, 2023 |
| Linux | kernel-debug-core RHEL 8 | 0:4.18.0-477.10.1.el8_8 | [RHSA-2023:2951](https://patchblox.com/security/data/fix/linux/rhsa-2023-2951.md) | May 16, 2023 |
| Linux | kernel-debug-core RHEL 9 | 0:5.14.0-284.11.1.el9_2 | [RHSA-2023:2458](https://patchblox.com/security/data/fix/linux/rhsa-2023-2458.md) | May 9, 2023 |
| Linux | kernel-debug-devel RHEL 8 | 0:4.18.0-477.10.1.el8_8 | [RHSA-2023:2951](https://patchblox.com/security/data/fix/linux/rhsa-2023-2951.md) | May 16, 2023 |
| Linux | kernel-debug-devel RHEL 9 | 0:5.14.0-284.11.1.el9_2 | [RHSA-2023:2458](https://patchblox.com/security/data/fix/linux/rhsa-2023-2458.md) | May 9, 2023 |
| Linux | kernel-debug-devel-matched RHEL 9 | 0:5.14.0-284.11.1.el9_2 | [RHSA-2023:2458](https://patchblox.com/security/data/fix/linux/rhsa-2023-2458.md) | May 9, 2023 |
| Linux | kernel-debug-modules RHEL 8 | 0:4.18.0-477.10.1.el8_8 | [RHSA-2023:2951](https://patchblox.com/security/data/fix/linux/rhsa-2023-2951.md) | May 16, 2023 |
| Linux | kernel-debug-modules RHEL 9 | 0:5.14.0-284.11.1.el9_2 | [RHSA-2023:2458](https://patchblox.com/security/data/fix/linux/rhsa-2023-2458.md) | May 9, 2023 |
| Linux | kernel-debug-modules-core RHEL 9 | 0:5.14.0-284.11.1.el9_2 | [RHSA-2023:2458](https://patchblox.com/security/data/fix/linux/rhsa-2023-2458.md) | May 9, 2023 |
| Linux | kernel-debug-modules-extra RHEL 8 | 0:4.18.0-477.10.1.el8_8 | [RHSA-2023:2951](https://patchblox.com/security/data/fix/linux/rhsa-2023-2951.md) | May 16, 2023 |
| Linux | kernel-debug-modules-extra RHEL 9 | 0:5.14.0-284.11.1.el9_2 | [RHSA-2023:2458](https://patchblox.com/security/data/fix/linux/rhsa-2023-2458.md) | May 9, 2023 |
| Linux | kernel-debug-uki-virt RHEL 9 | 0:5.14.0-284.11.1.el9_2 | [RHSA-2023:2458](https://patchblox.com/security/data/fix/linux/rhsa-2023-2458.md) | May 9, 2023 |
| Linux | kernel-devel RHEL 8 | 0:4.18.0-477.10.1.el8_8 | [RHSA-2023:2951](https://patchblox.com/security/data/fix/linux/rhsa-2023-2951.md) | May 16, 2023 |
| Linux | kernel-devel RHEL 9 | 0:5.14.0-284.11.1.el9_2 | [RHSA-2023:2458](https://patchblox.com/security/data/fix/linux/rhsa-2023-2458.md) | May 9, 2023 |
| Linux | kernel-devel-matched RHEL 9 | 0:5.14.0-284.11.1.el9_2 | [RHSA-2023:2458](https://patchblox.com/security/data/fix/linux/rhsa-2023-2458.md) | May 9, 2023 |
| Linux | kernel-doc RHEL 8 | 0:4.18.0-477.10.1.el8_8 | [RHSA-2023:2951](https://patchblox.com/security/data/fix/linux/rhsa-2023-2951.md) | May 16, 2023 |
| Linux | kernel-doc RHEL 9 | 0:5.14.0-284.11.1.el9_2 | [RHSA-2023:2458](https://patchblox.com/security/data/fix/linux/rhsa-2023-2458.md) | May 9, 2023 |
| Linux | kernel-modules RHEL 8 | 0:4.18.0-477.10.1.el8_8 | [RHSA-2023:2951](https://patchblox.com/security/data/fix/linux/rhsa-2023-2951.md) | May 16, 2023 |
| Linux | kernel-modules RHEL 9 | 0:5.14.0-284.11.1.el9_2 | [RHSA-2023:2458](https://patchblox.com/security/data/fix/linux/rhsa-2023-2458.md) | May 9, 2023 |
| Linux | kernel-modules-core RHEL 9 | 0:5.14.0-284.11.1.el9_2 | [RHSA-2023:2458](https://patchblox.com/security/data/fix/linux/rhsa-2023-2458.md) | May 9, 2023 |
| Linux | kernel-modules-extra RHEL 8 | 0:4.18.0-477.10.1.el8_8 | [RHSA-2023:2951](https://patchblox.com/security/data/fix/linux/rhsa-2023-2951.md) | May 16, 2023 |
| Linux | kernel-modules-extra RHEL 9 | 0:5.14.0-284.11.1.el9_2 | [RHSA-2023:2458](https://patchblox.com/security/data/fix/linux/rhsa-2023-2458.md) | May 9, 2023 |
| Linux | kernel-tools RHEL 8 | 0:4.18.0-477.10.1.el8_8 | [RHSA-2023:2951](https://patchblox.com/security/data/fix/linux/rhsa-2023-2951.md) | May 16, 2023 |
| Linux | kernel-tools RHEL 9 | 0:5.14.0-284.11.1.el9_2 | [RHSA-2023:2458](https://patchblox.com/security/data/fix/linux/rhsa-2023-2458.md) | May 9, 2023 |
| Linux | kernel-tools-libs RHEL 8 | 0:4.18.0-477.10.1.el8_8 | [RHSA-2023:2951](https://patchblox.com/security/data/fix/linux/rhsa-2023-2951.md) | May 16, 2023 |
| Linux | kernel-tools-libs RHEL 9 | 0:5.14.0-284.11.1.el9_2 | [RHSA-2023:2458](https://patchblox.com/security/data/fix/linux/rhsa-2023-2458.md) | May 9, 2023 |
| Linux | kernel-tools-libs-devel RHEL 8 | 0:4.18.0-477.10.1.el8_8 | [RHSA-2023:2951](https://patchblox.com/security/data/fix/linux/rhsa-2023-2951.md) | May 16, 2023 |
| Linux | kernel-tools-libs-devel RHEL 9 | 0:5.14.0-284.11.1.el9_2 | [RHSA-2023:2458](https://patchblox.com/security/data/fix/linux/rhsa-2023-2458.md) | May 9, 2023 |
| Linux | kernel-uki-virt RHEL 9 | 0:5.14.0-284.11.1.el9_2 | [RHSA-2023:2458](https://patchblox.com/security/data/fix/linux/rhsa-2023-2458.md) | May 9, 2023 |
| Linux | kernel-zfcpdump RHEL 8 | 0:4.18.0-477.10.1.el8_8 | [RHSA-2023:2951](https://patchblox.com/security/data/fix/linux/rhsa-2023-2951.md) | May 16, 2023 |
| Linux | kernel-zfcpdump RHEL 9 | 0:5.14.0-284.11.1.el9_2 | [RHSA-2023:2458](https://patchblox.com/security/data/fix/linux/rhsa-2023-2458.md) | May 9, 2023 |
| Linux | kernel-zfcpdump-core RHEL 8 | 0:4.18.0-477.10.1.el8_8 | [RHSA-2023:2951](https://patchblox.com/security/data/fix/linux/rhsa-2023-2951.md) | May 16, 2023 |
| Linux | kernel-zfcpdump-core RHEL 9 | 0:5.14.0-284.11.1.el9_2 | [RHSA-2023:2458](https://patchblox.com/security/data/fix/linux/rhsa-2023-2458.md) | May 9, 2023 |
| Linux | kernel-zfcpdump-devel RHEL 8 | 0:4.18.0-477.10.1.el8_8 | [RHSA-2023:2951](https://patchblox.com/security/data/fix/linux/rhsa-2023-2951.md) | May 16, 2023 |
| Linux | kernel-zfcpdump-devel RHEL 9 | 0:5.14.0-284.11.1.el9_2 | [RHSA-2023:2458](https://patchblox.com/security/data/fix/linux/rhsa-2023-2458.md) | May 9, 2023 |
| Linux | kernel-zfcpdump-devel-matched RHEL 9 | 0:5.14.0-284.11.1.el9_2 | [RHSA-2023:2458](https://patchblox.com/security/data/fix/linux/rhsa-2023-2458.md) | May 9, 2023 |
| Linux | kernel-zfcpdump-modules RHEL 8 | 0:4.18.0-477.10.1.el8_8 | [RHSA-2023:2951](https://patchblox.com/security/data/fix/linux/rhsa-2023-2951.md) | May 16, 2023 |
| Linux | kernel-zfcpdump-modules RHEL 9 | 0:5.14.0-284.11.1.el9_2 | [RHSA-2023:2458](https://patchblox.com/security/data/fix/linux/rhsa-2023-2458.md) | May 9, 2023 |
| Linux | kernel-zfcpdump-modules-core RHEL 9 | 0:5.14.0-284.11.1.el9_2 | [RHSA-2023:2458](https://patchblox.com/security/data/fix/linux/rhsa-2023-2458.md) | May 9, 2023 |
| Linux | kernel-zfcpdump-modules-extra RHEL 8 | 0:4.18.0-477.10.1.el8_8 | [RHSA-2023:2951](https://patchblox.com/security/data/fix/linux/rhsa-2023-2951.md) | May 16, 2023 |
| Linux | kernel-zfcpdump-modules-extra RHEL 9 | 0:5.14.0-284.11.1.el9_2 | [RHSA-2023:2458](https://patchblox.com/security/data/fix/linux/rhsa-2023-2458.md) | May 9, 2023 |
| Linux | linux Debian 12.15 (bookworm) | 5.18.5-1 | [DEBIAN-CVE-2022-49416](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49416.md) | Feb 26, 2025 |
| Linux | linux Debian 13.5 (trixie) | 5.18.5-1 | [DEBIAN-CVE-2022-49416](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49416.md) | Feb 26, 2025 |
| Linux | linux Debian 14 | 5.18.5-1 | [DEBIAN-CVE-2022-49416](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49416.md) | Feb 26, 2025 |
| Linux | perf RHEL 8 | 0:4.18.0-477.10.1.el8_8 | [RHSA-2023:2951](https://patchblox.com/security/data/fix/linux/rhsa-2023-2951.md) | May 16, 2023 |
| Linux | perf RHEL 9 | 0:5.14.0-284.11.1.el9_2 | [RHSA-2023:2458](https://patchblox.com/security/data/fix/linux/rhsa-2023-2458.md) | May 9, 2023 |
| Linux | python3-perf RHEL 8 | 0:4.18.0-477.10.1.el8_8 | [RHSA-2023:2951](https://patchblox.com/security/data/fix/linux/rhsa-2023-2951.md) | May 16, 2023 |
| Linux | python3-perf RHEL 9 | 0:5.14.0-284.11.1.el9_2 | [RHSA-2023:2458](https://patchblox.com/security/data/fix/linux/rhsa-2023-2458.md) | May 9, 2023 |
| Linux | rtla RHEL 9 | 0:5.14.0-284.11.1.el9_2 | [RHSA-2023:2458](https://patchblox.com/security/data/fix/linux/rhsa-2023-2458.md) | May 9, 2023 |

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