ghsa-qrhr-9q6x-9gg9
Vulnerability from github
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.
{
"affected": [],
"aliases": [
"CVE-2021-47631"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-02-26T06:37:04Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nARM: davinci: da850-evm: Avoid NULL pointer dereference\n\nWith newer versions of GCC, there is a panic in da850_evm_config_emac()\nwhen booting multi_v5_defconfig in QEMU under the palmetto-bmc machine:\n\nUnable to handle kernel NULL pointer dereference at virtual address 00000020\npgd = (ptrval)\n[00000020] *pgd=00000000\nInternal error: Oops: 5 [#1] PREEMPT ARM\nModules linked in:\nCPU: 0 PID: 1 Comm: swapper Not tainted 5.15.0 #1\nHardware name: Generic DT based system\nPC is at da850_evm_config_emac+0x1c/0x120\nLR is at do_one_initcall+0x50/0x1e0\n\nThe emac_pdata pointer in soc_info is NULL because davinci_soc_info only\ngets populated on davinci machines but da850_evm_config_emac() is called\non all machines via device_initcall().\n\nMove the rmii_en assignment below the machine check so that it is only\ndereferenced when running on a supported SoC.",
"id": "GHSA-qrhr-9q6x-9gg9",
"modified": "2025-03-18T21:31:58Z",
"published": "2025-03-18T21:31:58Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-47631"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0940795c6834fbe7705acc5c3d4b2f7a5f67527a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0a312ec66a03133d28570f07bc52749ccfef54da"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/83a1cde5c74bfb44b49cb2a940d044bb2380f4ea"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/89931d4762572aaee6edbe5673d41f8082de110f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a12b356d45cbb6e8a1b718d1436b3d6239a862f3"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c06f476e5b74bcabb8c4a2fba55864a37e62843b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c5628533a3ece64235d04fe11ec44d2be99e423d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c64e2ed5cc376e137e572babfd2edc38b2cfb61b"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
Sightings
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