GHSA-MX2P-X42H-MMF6
Vulnerability from github – Published: 2024-03-06 09:30 – Updated: 2024-03-18 15:30In the Linux kernel, the following vulnerability has been resolved:
ACPI: extlog: fix NULL pointer dereference check
The gcc plugin -fanalyzer [1] tries to detect various patterns of incorrect behaviour. The tool reports:
drivers/acpi/acpi_extlog.c: In function ‘extlog_exit’: drivers/acpi/acpi_extlog.c:307:12: warning: check of ‘extlog_l1_addr’ for NULL after already dereferencing it [-Wanalyzer-deref-before-check] | | 306 | ((struct extlog_l1_head *)extlog_l1_addr)->flags &= ~FLAG_OS_OPTIN; | | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~ | | | | | (1) pointer ‘extlog_l1_addr’ is dereferenced here | 307 | if (extlog_l1_addr) | | ~ | | | | | (2) pointer ‘extlog_l1_addr’ is checked for NULL here but it was already dereferenced at (1) |
Fix the NULL pointer dereference check in extlog_exit().
{
"affected": [],
"aliases": [
"CVE-2023-52605"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-03-06T07:15:11Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nACPI: extlog: fix NULL pointer dereference check\n\nThe gcc plugin -fanalyzer [1] tries to detect various\npatterns of incorrect behaviour. The tool reports:\n\ndrivers/acpi/acpi_extlog.c: In function \u2018extlog_exit\u2019:\ndrivers/acpi/acpi_extlog.c:307:12: warning: check of \u2018extlog_l1_addr\u2019 for NULL after already dereferencing it [-Wanalyzer-deref-before-check]\n |\n | 306 | ((struct extlog_l1_head *)extlog_l1_addr)-\u003eflags \u0026= ~FLAG_OS_OPTIN;\n | | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~\n | | |\n | | (1) pointer \u2018extlog_l1_addr\u2019 is dereferenced here\n | 307 | if (extlog_l1_addr)\n | | ~\n | | |\n | | (2) pointer \u2018extlog_l1_addr\u2019 is checked for NULL here but it was already dereferenced at (1)\n |\n\nFix the NULL pointer dereference check in extlog_exit().",
"id": "GHSA-mx2p-x42h-mmf6",
"modified": "2024-03-18T15:30:47Z",
"published": "2024-03-06T09:30:29Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-52605"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/33650372e3ead97c5ab3b84d9ad97737bc5e00c0"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5457b0cbaa0238fc56b855c4ef2c0b9cc9c559ab"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/72d9b9747e78979510e9aafdd32eb99c7aa30dd1"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/77846571b3ba6a6125a20ad109bb8514ba884cf9"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b17a71435e7e153e949df018244a98b4ede04069"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b7b33627be0626b16ca321b982d6a2261ef7f703"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d2049af7ddbc361702c3e1f09bd6c5e9488454ca"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f066171de33d71ff0f7c46bd17636a5a26db3fb6"
}
],
"schema_version": "1.4.0",
"severity": []
}
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