zram: set default primary compressor in zram_destroy_comps()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-89717
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-11 20:19:59 UTC
Updated2026-09-11 20:19:59 UTC
DescriptionIn 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().

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 486fd58af7ac1098b68370b1d4d9f94a2a1c7124 5cec3e60e9f2d1324179df3aa91656f90095cf8f git Not specified
CNA Linux Linux affected 486fd58af7ac1098b68370b1d4d9f94a2a1c7124 dea8f13c3dfad8b990f8ea96c997aabeebbc1d22 git Not specified
CNA Linux Linux affected 486fd58af7ac1098b68370b1d4d9f94a2a1c7124 dde75313eed0b014c437f48dd75c0308b592cbf9 git Not specified
CNA Linux Linux affected 6e20720b12299595154857fa98222729f0d5823c git Not specified
CNA Linux Linux affected c4e5683c3031a33dc46954e99d37cbd2f706cdb6 git Not specified
CNA Linux Linux affected 6.6.57 6.7 semver Not specified
CNA Linux Linux affected 6.11.4 6.12 semver Not specified
CNA Linux Linux affected 6.12 Not specified
CNA Linux Linux unaffected 6.12 semver Not specified
CNA Linux Linux unaffected 6.18.51 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.4 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/dde75313eed0b014c437f48dd75c0308b592cbf9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/5cec3e60e9f2d1324179df3aa91656f90095cf8f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/dea8f13c3dfad8b990f8ea96c997aabeebbc1d22 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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