Description
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 products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
8c6f6fa6772696be0c047a711858084b38763728 to < d3a1fb2ca323d7a4e10ab3afbfa25e6d8921e4f2affected8c6f6fa6772696be0c047a711858084b38763728 to < e96d48b37708d53cbdc47f6f60b0714fc4a5f596affected8c6f6fa6772696be0c047a711858084b38763728 to < d1b041080086e91d3733a5438a8c51ad5d3d8e09affected8c6f6fa6772696be0c047a711858084b38763728 to < 77695a69baca9b99d95fad09fc78c2318736604faffected8c6f6fa6772696be0c047a711858084b38763728 to < 184d2e9db27c0f76226b5cad16fe29510a5d2280affected8c6f6fa6772696be0c047a711858084b38763728 to < d6e1c9b02d85a4f1f4ba6d68e916d9b610a3ed7daffected8c6f6fa6772696be0c047a711858084b38763728 to < 5e67ba9bb531e1ec6599a82a065dea9040b9ce50affected
Linux Linux
Default version status: affected
5.15affected0 to < 5.15unaffected5.15.210 to ≤ 5.15.*unaffected6.1.168 to ≤ 6.1.*unaffected6.6.134 to ≤ 6.6.*unaffected6.12.81 to ≤ 6.12.*unaffected6.18.22 to ≤ 6.18.*unaffected6.19.12 to ≤ 6.19.*unaffected7.0 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/d3a1fb2ca323d7a4e10ab3afbfa25e6d8921e4f2 ↗
- https://git.kernel.org/stable/c/e96d48b37708d53cbdc47f6f60b0714fc4a5f596 ↗
- https://git.kernel.org/stable/c/d1b041080086e91d3733a5438a8c51ad5d3d8e09 ↗
- https://git.kernel.org/stable/c/77695a69baca9b99d95fad09fc78c2318736604f ↗
- https://git.kernel.org/stable/c/184d2e9db27c0f76226b5cad16fe29510a5d2280 ↗
- https://git.kernel.org/stable/c/d6e1c9b02d85a4f1f4ba6d68e916d9b610a3ed7d ↗
- https://git.kernel.org/stable/c/5e67ba9bb531e1ec6599a82a065dea9040b9ce50 ↗