CVE-2026-80627

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

MIPS: mm: Fix out-of-bounds write in maarreswalk()

maarreswalk() uses wi->numcfg as the index into the fixed-size wi->cfg array, but checks whether the array is full only after it has filled the selected entry. If walksystemramrange() reports more than 16 memory ranges, the overflow call writes one struct maarconfig past the end of the array before WARNON() prevents num_cfg from advancing.

Move the full-array check before taking the array slot and return non-zero when the scratch array is full, so walksystemram_range() terminates the walk instead of invoking the callback for further ranges.