CVE - CVE-2021-47631

CVE-ID
CVE-2021-47631	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: ARM: davinci: da850-evm: Avoid NULL pointer dereference With newer versions of GCC, there is a panic in da850_evm_config_emac() when booting multi_v5_defconfig in QEMU under the palmetto-bmc machine: Unable to handle kernel NULL pointer dereference at virtual address 00000020 pgd = (ptrval) [00000020] *pgd=00000000 Internal error: Oops: 5 [#1] PREEMPT ARM Modules linked in: CPU: 0 PID: 1 Comm: swapper Not tainted 5.15.0 #1 Hardware name: Generic DT based system PC is at da850_evm_config_emac+0x1c/0x120 LR is at do_one_initcall+0x50/0x1e0 The emac_pdata pointer in soc_info is NULL because davinci_soc_info only gets populated on davinci machines but da850_evm_config_emac() is called on all machines via device_initcall(). Move the rmii_en assignment below the machine check so that it is only dereferenced when running on a supported SoC.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/0940795c6834fbe7705acc5c3d4b2f7a5f67527a URL:https://git.kernel.org/stable/c/0940795c6834fbe7705acc5c3d4b2f7a5f67527a MISC:https://git.kernel.org/stable/c/0a312ec66a03133d28570f07bc52749ccfef54da URL:https://git.kernel.org/stable/c/0a312ec66a03133d28570f07bc52749ccfef54da MISC:https://git.kernel.org/stable/c/83a1cde5c74bfb44b49cb2a940d044bb2380f4ea URL:https://git.kernel.org/stable/c/83a1cde5c74bfb44b49cb2a940d044bb2380f4ea MISC:https://git.kernel.org/stable/c/89931d4762572aaee6edbe5673d41f8082de110f URL:https://git.kernel.org/stable/c/89931d4762572aaee6edbe5673d41f8082de110f MISC:https://git.kernel.org/stable/c/a12b356d45cbb6e8a1b718d1436b3d6239a862f3 URL:https://git.kernel.org/stable/c/a12b356d45cbb6e8a1b718d1436b3d6239a862f3 MISC:https://git.kernel.org/stable/c/c06f476e5b74bcabb8c4a2fba55864a37e62843b URL:https://git.kernel.org/stable/c/c06f476e5b74bcabb8c4a2fba55864a37e62843b MISC:https://git.kernel.org/stable/c/c5628533a3ece64235d04fe11ec44d2be99e423d URL:https://git.kernel.org/stable/c/c5628533a3ece64235d04fe11ec44d2be99e423d MISC:https://git.kernel.org/stable/c/c64e2ed5cc376e137e572babfd2edc38b2cfb61b URL:https://git.kernel.org/stable/c/c64e2ed5cc376e137e572babfd2edc38b2cfb61b
Assigning CNA
kernel.org
Date Record Created
20250226	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20250226)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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