zram: fix use-after-free in zram_bvec_write_partial()
In the Linux kernel, the following vulnerability has been resolved: zram: fix use-after-free in zram_bvec_write_partial() zram_read_page() picks the sync or async backing device read path based on whether the parent bio is NULL. zram_bvec_write_partial() passes its parent bio down, so for ZRAM_WB slots the read is dispatched asynchronously and zram_read_page() returns 0 while the bio is still in flight. The caller then runs memcpy_from_bvec(), zram_write_page() and __free_page() on the buffer, leaving the async read to write into a freed page. zram_bvec_read_partial() was switched to NULL in commit 4e3c87b9421d ("zram: fix synchronous reads") for the same reason; the write_partial counterpart was missed.
CVE-2026-53185
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-2026-53185
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": "8e654f8fbff52ac483fb69957222853d7e2fc588",
"lessThan": "0c2821665ff71be3f4b07ecece384669f2877f6a",
"versionType": "git"
},
{
"status": "affected",
"version": "8e654f8fbff52ac483fb69957222853d7e2fc588",
"lessThan": "77a602b505ce4802915853cfc435a4722fab3e64",
"versionType": "git"
},
{
"status": "affected",
"version": "8e654f8fbff52ac483fb69957222853d7e2fc588",
"lessThan": "c96786d6ff1acc1d54d9241e97767554c1dfdd5b",
"versionType": "git"
},
{
"status": "affected",
"version": "8e654f8fbff52ac483fb69957222853d7e2fc588",
"lessThan": "198b5a14cca27263b9c14b20114c8092de15dfcb",
"versionType": "git"
},
{
"status": "affected",
"version": "8e654f8fbff52ac483fb69957222853d7e2fc588",
"lessThan": "732fd9f0b9c1cdc6dfd77162ded60df005182cc0",
"versionType": "git"
}
],
"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": "4.14"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.14",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.143",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.94",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.36",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.13",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/block/zram/zram_drv.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-53185
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #40767 · Revision 1
- Added to Heist Feed
- Publisher date