7.8

CVE-2022-48637

bnxt: prevent skb UAF after handing over to PTP worker

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 5.14 < 5.15.71
Linux ≫ Linux Kernel Version >= 5.16 < 5.19.12
Linux ≫ Linux Kernel Version6.0 Updaterc1
Linux ≫ Linux Kernel Version6.0 Updaterc2
Linux ≫ Linux Kernel Version6.0 Updaterc3
Linux ≫ Linux Kernel Version6.0 Updaterc4
Linux ≫ Linux Kernel Version6.0 Updaterc5
Linux ≫ Linux Kernel Version6.0 Updaterc6
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.23% 0.132
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-416 Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

https://git.kernel.org/stable/c/08483e4c0c83b221b8891434a04cec405dee94a6
Patch
https://git.kernel.org/stable/c/32afa1f23e42cc635ccf4c39f24514d03d1e8338
Patch
https://git.kernel.org/stable/c/c31f26c8f69f776759cbbdfb38e40ea91aa0dd65
Patch