UNKNOWN NVD
CVE-2026-89717
In the Linux kernel, the following vulnerability has been resolved: zram: set default primary compressor in zram_destroy_comps() Patch series "zram: fix zram
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().
References
- https://git.kernel.org/stable/c/5cec3e60e9f2d1324179df3aa91656f90095cf8f
- https://git.kernel.org/stable/c/dde75313eed0b014c437f48dd75c0308b592cbf9
- https://git.kernel.org/stable/c/dea8f13c3dfad8b990f8ea96c997aabeebbc1d22
This unknown severity vulnerability was published on 2026-09-11 via NVD.
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