CVE-2026-89608

In the Linux kernel, the following vulnerability has been resolved:

ecryptfs: pass packet set buffer size to parser

ecryptfs_parse_packet_set() receives a pointer into the file header, but

it calculates the remaining packet buffer size from PAGE_SIZE - 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.