CVE-2021-47282
published 2024-05-21CVE-2021-47282: In the Linux kernel, the following vulnerability has been resolved: spi: bcm2835: Fix out-of-bounds access with more than 4 slaves Commit 571e31fa60b3 ("spi…
PriorityP340high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.23%
13.9th percentile
In the Linux kernel, the following vulnerability has been resolved:
spi: bcm2835: Fix out-of-bounds access with more than 4 slaves
Commit 571e31fa60b3 ("spi: bcm2835: Cache CS register value for
->prepare_message()") limited the number of slaves to 3 at compile-time.
The limitation was necessitated by a statically-sized array prepare_cs[]
in the driver private data which contains a per-slave register value.
The commit sought to enforce the limitation at run-time by setting the
controller's num_chipselect to 3: Slaves with a higher chipselect are
rejected by spi_add_device().
However the commit neglected that num_chipselect only limits the number
of *native* chipselects. If GPIO chipselects are specified in the
device tree for more than 3 slaves, num_chipselect is silently raised by
of_spi_get_gpio_numbers() and the result are out-of-bounds accesses to
the statically-sized array prepare_cs[].
As a bandaid fix which is backportable to stable, raise the number of
allowed slaves to 24 (which "ought to be enough for anybody"), enforce
the limitation on slave ->setup and revert num_chipselect to 3 (which is
the number of native chipselects supported by the controller).
An upcoming for-next commit will allow an arbitrary number of slaves.
Affected
14 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 5.10.46-1 (bookworm) | linux 5.10.46-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | >= 571e31fa60b3697d5db26140e16d5c45c51c9815 < b5502580cf958b094f3b69dfe4eece90eae01fbc | b5502580cf958b094f3b69dfe4eece90eae01fbc |
| linux | linux | >= 571e31fa60b3697d5db26140e16d5c45c51c9815 < 82a8ffba54d31e97582051cb56ba1f988018681e | 82a8ffba54d31e97582051cb56ba1f988018681e |
| linux | linux | >= 571e31fa60b3697d5db26140e16d5c45c51c9815 < 01415ff85a24308059e06ca3e97fd7bf75648690 | 01415ff85a24308059e06ca3e97fd7bf75648690 |
| linux | linux | >= 571e31fa60b3697d5db26140e16d5c45c51c9815 < 13817d466eb8713a1ffd254f537402f091d48444 | 13817d466eb8713a1ffd254f537402f091d48444 |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 5.10.46-1 | 5.10.46-1 |
| linux | linux_kernel | >= 0 < 5.10.46-1 | 5.10.46-1 |
| linux | linux_kernel | >= 0 < 5.10.46-1 | 5.10.46-1 |
| linux | linux_kernel | >= 0 < 5.10.46-1 | 5.10.46-1 |
| linux | linux_kernel | >= 5.11 < 5.12.11 | 5.12.11 |
| linux | linux_kernel | >= 5.4 < 5.4.126 | 5.4.126 |
| linux | linux_kernel | >= 5.5 < 5.10.44 | 5.10.44 |
CVSS provenance
nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
osv7.8HIGH
vendor_debian7.8HIGH
vendor_redhat7.8HIGH
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Red Hat
kernel: spi: bcm2835: Fix out-of-bounds access with more than 4 slaves
vendor_redhat·2024-05-21·CVSS 7.8
CVE-2021-47282 [HIGH] CWE-125 kernel: spi: bcm2835: Fix out-of-bounds access with more than 4 slaves
kernel: spi: bcm2835: Fix out-of-bounds access with more than 4 slaves
In the Linux kernel, the following vulnerability has been resolved:
spi: bcm2835: Fix out-of-bounds access with more than 4 slaves
Commit 571e31fa60b3 ("spi: bcm2835: Cache CS register value for
->prepare_message()") limited the number of slaves to 3 at compile-time.
The limitation was necessitated by a statically-sized array prepare_cs[]
in the driver private data which contains a per-slave register value.
The commit sought to enforce the limitation at run-time by setting the
controller's num_chipselect to 3: Slaves with a higher chipselect are
rejected by spi_add_device().
However the commit neglected that num_chipselect only limits the number
of *native* chipselects. If GPIO chipselects are specified in the
device t
Debian
CVE-2021-47282: linux - In the Linux kernel, the following vulnerability has been resolved: spi: bcm283...
vendor_debian·2021·CVSS 7.8
CVE-2021-47282 [HIGH] CVE-2021-47282: linux - In the Linux kernel, the following vulnerability has been resolved: spi: bcm283...
In the Linux kernel, the following vulnerability has been resolved: spi: bcm2835: Fix out-of-bounds access with more than 4 slaves Commit 571e31fa60b3 ("spi: bcm2835: Cache CS register value for ->prepare_message()") limited the number of slaves to 3 at compile-time. The limitation was necessitated by a statically-sized array prepare_cs[] in the driver private data which contains a per-slave register value. The commit sought to enforce the limitation at run-time by setting the controller's num_chipselect to 3: Slaves with a higher chipselect are rejected by spi_add_device(). However the commit neglected that num_chipselect only limits the number of *native* chipselects. If GPIO chipselects are specified in the device tree for more than 3 slaves, num_chipselect is silently raised by of_spi_
GHSA
GHSA-3wh6-h4gj-wjr7: In the Linux kernel, the following vulnerability has been resolved:
spi: bcm2835: Fix out-of-bounds access with more than 4 slaves
Commit 571e31fa60
ghsa_unreviewed·2024-05-21
CVE-2021-47282 [HIGH] CWE-787 GHSA-3wh6-h4gj-wjr7: In the Linux kernel, the following vulnerability has been resolved:
spi: bcm2835: Fix out-of-bounds access with more than 4 slaves
Commit 571e31fa60
In the Linux kernel, the following vulnerability has been resolved:
spi: bcm2835: Fix out-of-bounds access with more than 4 slaves
Commit 571e31fa60b3 ("spi: bcm2835: Cache CS register value for
->prepare_message()") limited the number of slaves to 3 at compile-time.
The limitation was necessitated by a statically-sized array prepare_cs[]
in the driver private data which contains a per-slave register value.
The commit sought to enforce the limitation at run-time by setting the
controller's num_chipselect to 3: Slaves with a higher chipselect are
rejected by spi_add_device().
However the commit neglected that num_chipselect only limits the number
of *native* chipselects. If GPIO chipselects are specified in the
device tree for more than 3 slaves, num_chipselect is silently raised by
of_
OSV
CVE-2021-47282: In the Linux kernel, the following vulnerability has been resolved: spi: bcm2835: Fix out-of-bounds access with more than 4 slaves Commit 571e31fa60b3
osv·2024-05-21·CVSS 7.8
CVE-2021-47282 [HIGH] CVE-2021-47282: In the Linux kernel, the following vulnerability has been resolved: spi: bcm2835: Fix out-of-bounds access with more than 4 slaves Commit 571e31fa60b3
In the Linux kernel, the following vulnerability has been resolved: spi: bcm2835: Fix out-of-bounds access with more than 4 slaves Commit 571e31fa60b3 ("spi: bcm2835: Cache CS register value for ->prepare_message()") limited the number of slaves to 3 at compile-time. The limitation was necessitated by a statically-sized array prepare_cs[] in the driver private data which contains a per-slave register value. The commit sought to enforce the limitation at run-time by setting the controller's num_chipselect to 3: Slaves with a higher chipselect are rejected by spi_add_device(). However the commit neglected that num_chipselect only limits the number of *native* chipselects. If GPIO chipselects are specified in the device tree for more than 3 slaves, num_chipselect is silently raised by of_spi_
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/01415ff85a24308059e06ca3e97fd7bf75648690https://git.kernel.org/stable/c/13817d466eb8713a1ffd254f537402f091d48444https://git.kernel.org/stable/c/82a8ffba54d31e97582051cb56ba1f988018681ehttps://git.kernel.org/stable/c/b5502580cf958b094f3b69dfe4eece90eae01fbchttps://git.kernel.org/stable/c/01415ff85a24308059e06ca3e97fd7bf75648690https://git.kernel.org/stable/c/13817d466eb8713a1ffd254f537402f091d48444https://git.kernel.org/stable/c/82a8ffba54d31e97582051cb56ba1f988018681ehttps://git.kernel.org/stable/c/b5502580cf958b094f3b69dfe4eece90eae01fbc
2024-05-21
Published