GHSA-VRQJ-MF6P-P2FV
Vulnerability from github – Published: 2026-08-10 15:33 – Updated: 2026-08-14 00:31In the Linux kernel, the following vulnerability has been resolved:
LoongArch: BPF: Zero-extend signed ALU32 div/mod results
ALU32 operations write a 32-bit result and leave the upper 32 bits of the BPF register zero. The LoongArch JIT sign-extends the result of signed ALU32 BPF_DIV and BPF_MOD (off=1), so a negative 32-bit quotient or remainder leaves bits 63:32 set in JITted code while the verifier and interpreter model those bits as zero.
Keep sign-extension on the operands, which signed divide needs, and zero-extend the ALU32 result after the divide or modulo instruction, matching the unsigned ALU32 div/mod paths and every other ALU32 operation in this JIT.
{
"affected": [],
"aliases": [
"CVE-2026-68295"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-08-10T13:20:18Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nLoongArch: BPF: Zero-extend signed ALU32 div/mod results\n\nALU32 operations write a 32-bit result and leave the upper 32 bits of\nthe BPF register zero. The LoongArch JIT sign-extends the result of\nsigned ALU32 BPF_DIV and BPF_MOD (off=1), so a negative 32-bit quotient\nor remainder leaves bits 63:32 set in JITted code while the verifier\nand interpreter model those bits as zero.\n\nKeep sign-extension on the operands, which signed divide needs, and\nzero-extend the ALU32 result after the divide or modulo instruction,\nmatching the unsigned ALU32 div/mod paths and every other ALU32\noperation in this JIT.",
"id": "GHSA-vrqj-mf6p-p2fv",
"modified": "2026-08-14T00:31:54Z",
"published": "2026-08-10T15:33:45Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68295"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/716cb29dbed4d62e9e108950a1a82bcba4cc2d45"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/dacd348b8a993373576fe2ee2d8b114740ba57a6"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
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