CVE-2026-89717 (GCVE-0-2026-89717)

Vulnerability from cvelistv5 – Published: 2026-09-11 19:46 – Updated: 2026-10-21 12:48
VLAI
Title
zram: set default primary compressor in zram_destroy_comps()
Summary
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().
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7018 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 6e20720b12299595154857fa98222729f0d5823c , < a5fda7def04d98ab7c5cbb2394714fb1f8c56cb5 (git)
Affected: 486fd58af7ac1098b68370b1d4d9f94a2a1c7124 , < 4bf3328eeec9afc2a55632ff47fc18101ea62d73 (git)
Affected: 486fd58af7ac1098b68370b1d4d9f94a2a1c7124 , < 5cec3e60e9f2d1324179df3aa91656f90095cf8f (git)
Affected: 486fd58af7ac1098b68370b1d4d9f94a2a1c7124 , < dea8f13c3dfad8b990f8ea96c997aabeebbc1d22 (git)
Affected: 486fd58af7ac1098b68370b1d4d9f94a2a1c7124 , < dde75313eed0b014c437f48dd75c0308b592cbf9 (git)
Affected: c4e5683c3031a33dc46954e99d37cbd2f706cdb6 (git)
Affected: 6.6.57 , < 6.6.160 (semver)
Affected: 6.11.4 , < 6.12 (semver)
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Linux Linux Affected: 6.12
Unaffected: 0 , < 6.12 (semver)
Unaffected: 6.6.160 , ≤ 6.6.* (semver)
Unaffected: 6.12.111 , ≤ 6.12.* (semver)
Unaffected: 6.18.51 , ≤ 6.18.* (semver)
Unaffected: 7.2.4 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
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        "dateUpdated": "2026-10-21T12:48:28.119Z",
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    "dateReserved": "2026-09-11T19:38:34.752Z",
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        "id": "CVE-2026-89717",
        "lastModified": "2026-10-21T13:20:22.557",
        "metrics": {},
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      "cve": "CVE-2026-89717",
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      "product_status:known_affected": "185",
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      "source": "Red Hat CSAF VEX",
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      "title": "kernel: zram: set default primary compressor in zram_destroy_comps()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89717.json",
      "version": "3"
    }
  }
}



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