UBUNTU-CVE-2026-89608: High severity ubuntu/linux vulnerability

In the Linux kernel, the following vulnerability has been resolved: ecryptfs: pass packet set buffer size to parser ecryptfsparsepacketset() receives a pointer into the file header, but it calculates the remaining packet buffer size from PAGESIZE - 8. For version 1 headers the packet set starts later in the header, so this can overstate the available buffer. Pass the actual packet set buffer length from the caller and calculate per-packet limits from the remaining bytes in that buffer. Recompute the remaining length after consuming a tag 3 packet before parsing the following tag 11 packet.