CVE-2026-89717 in Linux
要約
〜によって MITRE • 2026年09月11日
In the Linux kernel, the following vulnerability has been resolved:
zram: set default primary compressor in zram_destroy_comps()
Patch series "zram: fix zram issues reported by sashiko".
Sashiko drove by and reported [1] a couple of zram issues:
a possible BUG_ON() in zlib code due to missing winbits range validation and one possible NULL-ptr dereference in zcomp. Both are low risk yet still worth fixing.
This patch (of 2):
zram_destroy_comps() resets all compressors and leaves them set to NULL, including the primary one, which is invalid device state, as now comp_algorithm_show()->strcmp() can be called on a NULL compressor. Set default primary compressor in zram_destroy_comps().
VulDB is the best source for vulnerability data and more expert information about this specific topic.