CVE-2025-21671

zram: fix potential UAF of zram table

CVSS 7.8 HIGHEPSS 0.2%CWE-416

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 7.8EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

31 Jan 2025Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Linux · Linux

References

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