CVSS 5.5 · Medium EPSS 0,15%
Kerentanan NULL Pointer Dereference pada linux kernel. Skor CVSS 3.1 5.5 (Medium) menurut NVD.
In the Linux kernel, the following vulnerability has been resolved: spi: bcm-qspi: return error if neither hif_mspi nor mspi is available If neither a "hif_mspi" nor "mspi" resource is present, the driver will just early exit in probe but still return success. Apart from not doing anything meaningful, this would then also lead to a null pointer access on removal, as platform_get_drvdata() would return NULL, which it would then try to dereference when trying to unregister the spi master. Fix this by unconditionally calling devm_ioremap_resource(), as it can handle a NULL res and will then return a viable ERR_PTR() if we get one. The "return 0;" was previously a "goto qspi_resource_err;" where then ret was returned, but since ret was still initialized to 0 at this place this was a valid conversion in 63c5395bb7a9 ("spi: bcm-qspi: Fix use-after-free on unbind"). The issue was not introduced by this commit, only made more obvious.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
· uraikan di kalkulator | Vendor | Produk | Versi terdampak |
|---|---|---|
| linux | linux kernel | Versi 4.9 hingga sebelum 4.14.322 |
| linux | linux kernel | Versi 4.15 hingga sebelum 4.19.291 |
| linux | linux kernel | Versi 4.20 hingga sebelum 5.4.251 |
| linux | linux kernel | Versi 5.5 hingga sebelum 5.10.188 |
| linux | linux kernel | Versi 5.11 hingga sebelum 5.15.121 |
| linux | linux kernel | Versi 5.16 hingga sebelum 6.1.39 |
| linux | linux kernel | Versi 6.2 hingga sebelum 6.4.4 |