Description · from the CVE record
In the Linux kernel, the following vulnerability has been resolved:
net/ipv6: ioam6: prevent schema length wraparound in trace fill
ioam6_fill_trace_data() stores the schema contribution to the trace
length in a u8. With bit 22 enabled and the largest schema payload,
sclen becomes 1 + 1020 / 4, wraps from 256 to 0, and bypasses the
remaining-space check. __ioam6_fill_trace_data() then positions the
write cursor without reserving the schema area but still copies the
4-byte schema header and the full schema payload, overrunning the trace
buffer.
Keep sclen in an unsigned int so the remaining-space check and the write
cursor calculation both see the full schema length.
Affected
ProductAffectedFixed inSource
Linux8c6f6fa6772696be0c047a711858084b38763728 – < d3a1fb2ca323d7a4e10ab3afbfa25e6d8921e4f2d3a1fb2ca323d7a4e10ab3afbfa25e6d8921e4f2CNA
Linux8c6f6fa6772696be0c047a711858084b38763728 – < e96d48b37708d53cbdc47f6f60b0714fc4a5f596e96d48b37708d53cbdc47f6f60b0714fc4a5f596CNA
Linux8c6f6fa6772696be0c047a711858084b38763728 – < d1b041080086e91d3733a5438a8c51ad5d3d8e09d1b041080086e91d3733a5438a8c51ad5d3d8e09CNA
Linux8c6f6fa6772696be0c047a711858084b38763728 – < 77695a69baca9b99d95fad09fc78c2318736604f77695a69baca9b99d95fad09fc78c2318736604fCNA
Linux8c6f6fa6772696be0c047a711858084b38763728 – < 184d2e9db27c0f76226b5cad16fe29510a5d2280184d2e9db27c0f76226b5cad16fe29510a5d2280CNA
Linux8c6f6fa6772696be0c047a711858084b38763728 – < d6e1c9b02d85a4f1f4ba6d68e916d9b610a3ed7dd6e1c9b02d85a4f1f4ba6d68e916d9b610a3ed7dCNA
Linux8c6f6fa6772696be0c047a711858084b38763728 – < 5e67ba9bb531e1ec6599a82a065dea9040b9ce505e67ba9bb531e1ec6599a82a065dea9040b9ce50CNA
Linux5.155.15.210CNA
by Kastro