Description (CNA)
In 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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 2425c9e002d2a1fdca34261b2fa6713eafef2163 before 7577cca85f2d4590c9d9423ba72ef54181a713c9; affected 2425c9e002d2a1fdca34261b2fa6713eafef2163 before 16656c3d734693be3d8a36dbf9d09142b69f3ddc; affected 2425c9e002d2a1fdca34261b2fa6713eafef2163 before 716cb29dbed4d62e9e108950a1a82bcba4cc2d45; affected 2425c9e002d2a1fdca34261b2fa6713eafef2163 before dacd348b8a993373576fe2ee2d8b114740ba57a6 |
| Linux / Linux | affected 6.7; unaffected 0 before 6.7; unaffected 6.12.114 through 6.12.*; unaffected 6.18.57 through 6.18.*; unaffected 7.1.6 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.