7.8

CVE-2025-21671

zram: fix potential UAF of zram table

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 6.1.122 < 6.1.127
Linux ≫ Linux Kernel Version >= 6.6.68 < 6.6.74
Linux ≫ Linux Kernel Version >= 6.12.7 < 6.12.11
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.21% 0.114
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CISA-ADP 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-416 Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

https://git.kernel.org/stable/c/212fe1c0df4a150fb6298db2cfff267ceaba5402
Patch
https://git.kernel.org/stable/c/571d3f6045cd3a6d9f6aec33b678f3ffe97582ef
Patch
https://git.kernel.org/stable/c/902ef8f16d5ca77edc77c30656be54186c1e99b7
Patch
https://git.kernel.org/stable/c/fe3de867f94819ba0f28e035c0b0182150147d95
Patch
https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html