CVE-2025-21671
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2025-21671
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-21671.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2025-21671
- Downstream
- Related
- Published
- 2025-01-31T11:25:34.546Z
- Modified
- 2025-11-20T07:58:33.754038Z
- Severity
-
- 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- zram: fix potential UAF of zram table
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
zram: fix potential UAF of zram table
If zrammetaalloc failed early, it frees allocated zram->table without setting it NULL. Which will potentially cause zrammetafree to access the table if user reset an failed and uninitialized device.
- References
-
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/212fe1c0df4a150fb6298db2cfff267ceaba5402
- https://git.kernel.org/stable/c/571d3f6045cd3a6d9f6aec33b678f3ffe97582ef
- https://git.kernel.org/stable/c/902ef8f16d5ca77edc77c30656be54186c1e99b7
- https://git.kernel.org/stable/c/fe3de867f94819ba0f28e035c0b0182150147d95
- https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedac3b5366b9b7c9d97b606532ceab43d2329a22f3Fixedfe3de867f94819ba0f28e035c0b0182150147d95
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced0b5b0b65561b34e6e360de317e4bcd031bfabf42Fixed571d3f6045cd3a6d9f6aec33b678f3ffe97582ef
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced6fb92e9a52e3feae309a213950f21dfcd1eb0b40Fixed902ef8f16d5ca77edc77c30656be54186c1e99b7
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced74363ec674cb172d8856de25776c8f3103f05e2fFixed212fe1c0df4a150fb6298db2cfff267ceaba5402
Affected versions
v6.*
v6.1.122
v6.1.123
v6.1.124
v6.1.125
v6.1.126
v6.12.10
v6.12.7
v6.12.8
v6.12.9
v6.13-rc4
v6.13-rc5
v6.13-rc6
v6.6.68
v6.6.69
v6.6.70
v6.6.71
v6.6.72
v6.6.73
Database specific
vanir_signatures
[
{
"digest": {
"length": 533.0,
"function_hash": "28591253271867399981984648283640472045"
},
"deprecated": false,
"signature_version": "v1",
"target": {
"function": "zram_meta_alloc",
"file": "drivers/block/zram/zram_drv.c"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@212fe1c0df4a150fb6298db2cfff267ceaba5402",
"id": "CVE-2025-21671-0d45f11a",
"signature_type": "Function"
},
{
"digest": {
"line_hashes": [
"333382010484989274237413131536836355452",
"46045155742550784059022152260082092643",
"308819822850004835486949237070413461793",
"175705271587799910650959746358922761991"
],
"threshold": 0.9
},
"deprecated": false,
"signature_version": "v1",
"target": {
"file": "drivers/block/zram/zram_drv.c"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@902ef8f16d5ca77edc77c30656be54186c1e99b7",
"id": "CVE-2025-21671-25683817",
"signature_type": "Line"
},
{
"digest": {
"line_hashes": [
"333382010484989274237413131536836355452",
"46045155742550784059022152260082092643",
"308819822850004835486949237070413461793",
"175705271587799910650959746358922761991"
],
"threshold": 0.9
},
"deprecated": false,
"signature_version": "v1",
"target": {
"file": "drivers/block/zram/zram_drv.c"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@212fe1c0df4a150fb6298db2cfff267ceaba5402",
"id": "CVE-2025-21671-531993ee",
"signature_type": "Line"
},
{
"digest": {
"length": 533.0,
"function_hash": "28591253271867399981984648283640472045"
},
"deprecated": false,
"signature_version": "v1",
"target": {
"function": "zram_meta_alloc",
"file": "drivers/block/zram/zram_drv.c"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@902ef8f16d5ca77edc77c30656be54186c1e99b7",
"id": "CVE-2025-21671-868fdb00",
"signature_type": "Function"
}
]