zram: set default primary compressor in zram_destroy_comps()
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().
CVE-2026-89717
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-89717
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6e20720b12299595154857fa98222729f0d5823c",
"lessThan": "a5fda7def04d98ab7c5cbb2394714fb1f8c56cb5",
"versionType": "git"
},
{
"status": "affected",
"version": "486fd58af7ac1098b68370b1d4d9f94a2a1c7124",
"lessThan": "4bf3328eeec9afc2a55632ff47fc18101ea62d73",
"versionType": "git"
},
{
"status": "affected",
"version": "486fd58af7ac1098b68370b1d4d9f94a2a1c7124",
"lessThan": "5cec3e60e9f2d1324179df3aa91656f90095cf8f",
"versionType": "git"
},
{
"status": "affected",
"version": "486fd58af7ac1098b68370b1d4d9f94a2a1c7124",
"lessThan": "dea8f13c3dfad8b990f8ea96c997aabeebbc1d22",
"versionType": "git"
},
{
"status": "affected",
"version": "486fd58af7ac1098b68370b1d4d9f94a2a1c7124",
"lessThan": "dde75313eed0b014c437f48dd75c0308b592cbf9",
"versionType": "git"
},
{
"status": "affected",
"version": "c4e5683c3031a33dc46954e99d37cbd2f706cdb6",
"versionType": "git"
},
{
"status": "affected",
"version": "6.6.57",
"lessThan": "6.6.160",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.11.4",
"lessThan": "6.12",
"versionType": "semver"
}
],
"programFiles": [
"drivers/block/zram/zram_drv.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.12"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.12",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.111",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.51",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.4",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/block/zram/zram_drv.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-89717
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #46713 · Revision 1
- Added to Heist Feed
- Publisher date