CVE-2022-48637
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.23%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.23% probability · 14th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/08483e4c0c83b221b8891434a04cec405dee94a6Patch
- https://git.kernel.org/stable/c/32afa1f23e42cc635ccf4c39f24514d03d1e8338Patch
- https://git.kernel.org/stable/c/c31f26c8f69f776759cbbdfb38e40ea91aa0dd65Patch
- https://git.kernel.org/stable/c/08483e4c0c83b221b8891434a04cec405dee94a6Patch
- https://git.kernel.org/stable/c/32afa1f23e42cc635ccf4c39f24514d03d1e8338Patch
- https://git.kernel.org/stable/c/c31f26c8f69f776759cbbdfb38e40ea91aa0dd65Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.