GHSA-W4G3-PP54-PHHQ
Vulnerability from github – Published: 2025-10-01 12:30 – Updated: 2026-10-03 12:31In the Linux kernel, the following vulnerability has been resolved:
start_kernel: Add __no_stack_protector function attribute
Back during the discussion of commit a9a3ed1eff36 ("x86: Fix early boot crash on gcc-10, third try") we discussed the need for a function attribute to control the omission of stack protectors on a per-function basis; at the time Clang had support for no_stack_protector but GCC did not. This was fixed in gcc-11. Now that the function attribute is available, let's start using it.
Callers of boot_init_stack_canary need to use this function attribute unless they're compiled with -fno-stack-protector, otherwise the canary stored in the stack slot of the caller will differ upon the call to boot_init_stack_canary. This will lead to a call to __stack_chk_fail() then panic.
{
"affected": [],
"aliases": [
"CVE-2023-53491"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-10-01T12:15:52Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nstart_kernel: Add __no_stack_protector function attribute\n\nBack during the discussion of\ncommit a9a3ed1eff36 (\"x86: Fix early boot crash on gcc-10, third try\")\nwe discussed the need for a function attribute to control the omission\nof stack protectors on a per-function basis; at the time Clang had\nsupport for no_stack_protector but GCC did not. This was fixed in\ngcc-11. Now that the function attribute is available, let\u0027s start using\nit.\n\nCallers of boot_init_stack_canary need to use this function attribute\nunless they\u0027re compiled with -fno-stack-protector, otherwise the canary\nstored in the stack slot of the caller will differ upon the call to\nboot_init_stack_canary. This will lead to a call to __stack_chk_fail()\nthen panic.",
"id": "GHSA-w4g3-pp54-phhq",
"modified": "2026-10-03T12:31:01Z",
"published": "2025-10-01T12:30:30Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-53491"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/25e73018b4093e0cfbcec5dc4a4bb86d0b69ed56"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/514ca14ed5444b911de59ed3381dfd195d99fe4b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5a7e8f89cdee16db705905a5b1ce2100b13dd63e"
}
],
"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"
}
]
}
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