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 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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
7.8 HIGH
LOCAL
LOW
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
LinuxCNA
---
---
CISA-ADPADP
7.8 HIGH
LOCAL
LOW
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 2%
VendorProductVersion
linuxlinux_kernel
6.1.122 ≤
𝑥
< 6.1.127
linuxlinux_kernel
6.6.68 ≤
𝑥
< 6.6.74
linuxlinux_kernel
6.12.7 ≤
𝑥
< 6.12.11
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
linux
bullseye
5.10.223-1
not-affected
bullseye (security)
5.10.234-1
fixed
bookworm
6.1.129-1
fixed
bookworm (security)
6.1.128-1
fixed
trixie
6.12.20-1
fixed
sid
6.12.21-1
fixed
linux-6.1
bullseye (security)
6.1.129-1~deb11u1
fixed
Common Weakness Enumeration
Vulnerability Media Exposure
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