CVE-2025-21671 — Use After Free in Linux
Severity
7.8HIGHNVD
EPSS
0.0%
top 93.53%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedJan 31
Latest updateNov 28
Description
In the Linux kernel, the following vulnerability has been resolved:
zram: fix potential UAF of zram table
If zram_meta_alloc failed early, it frees allocated zram->table without
setting it NULL. Which will potentially cause zram_meta_free to access
the table if user reset an failed and uninitialized device.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitability: 1.8 | Impact: 5.9
Affected Packages5 packages
▶CVEListV5linux/linuxac3b5366b9b7c9d97b606532ceab43d2329a22f3 — fe3de867f94819ba0f28e035c0b0182150147d95+6
Patches
🔴Vulnerability Details
2OSV▶
CVE-2025-21671: In the Linux kernel, the following vulnerability has been resolved: zram: fix potential UAF of zram table If zram_meta_alloc failed early, it frees al↗2025-01-31
GHSA▶
GHSA-7792-f3h4-qxjq: In the Linux kernel, the following vulnerability has been resolved:
zram: fix potential UAF of zram table
If zram_meta_alloc failed early, it frees↗2025-01-31