# CVE-2022-48637: linux: In the Linux kernel, the following vulnerability has been resolved:  bnxt: prevent skb UAF after handing over to PTP...

CVE-2022-48637 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-48637, released April 28, 2024. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2022-48637
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0023
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 28, 2024

## Description

In the Linux kernel, the following vulnerability has been resolved:  bnxt: prevent skb UAF after handing over to PTP worker  When reading the timestamp is required bnxt_tx_int() hands over the ownership of the completed skb to the PTP worker. The skb should not be used afterwards, as the worker may run before the rest of our code and free the skb, leading to a use-after-free.  Since dev_kfree_skb_any() accepts NULL make the loss of ownership more obvious and set skb to NULL.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.0.2-1 | [DEBIAN-CVE-2022-48637](https://patchblox.com/security/data/fix/linux/debian-cve-2022-48637.md) | Apr 28, 2024 |
| Linux | linux Debian 13.5 (trixie) | 6.0.2-1 | [DEBIAN-CVE-2022-48637](https://patchblox.com/security/data/fix/linux/debian-cve-2022-48637.md) | Apr 28, 2024 |
| Linux | linux Debian 14 | 6.0.2-1 | [DEBIAN-CVE-2022-48637](https://patchblox.com/security/data/fix/linux/debian-cve-2022-48637.md) | Apr 28, 2024 |

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