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CVE-2022-48637
bnxt: prevent skb UAF after handing over to PTP worker
High7.8EPSS 0.23%
- Published
- Updated
- Reserved
- Assigned by
- Linux
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.23% · top 86% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
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The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Weakness
Affected products
- affected 83bb623c968e7351aee5111547693f95f330dc5a – < 08483e4c0c83b221b8891434a04cec405dee94a6
- affected 83bb623c968e7351aee5111547693f95f330dc5a – < 32afa1f23e42cc635ccf4c39f24514d03d1e8338
- affected 83bb623c968e7351aee5111547693f95f330dc5a – < c31f26c8f69f776759cbbdfb38e40ea91aa0dd65
- affected 5.14
- unaffected < 5.14
- unaffected 5.15.71 – ≤ 5.15.*
- unaffected 5.19.12 – ≤ 5.19.*
- unaffected 6.0 – ≤ *
References (3)
- https://git.kernel.org/stable/c/08483e4c0c83b221b8891434a04cec405dee94a6 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/32afa1f23e42cc635ccf4c39f24514d03d1e8338 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/c31f26c8f69f776759cbbdfb38e40ea91aa0dd65 (opens in a new tab)x_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://trackcve.app/cve/CVE-2022-48637)Record last updated .