5.5

CVE-2025-21980

sched: address a potential NULL pointer dereference in the GRED scheduler.

In the Linux kernel, the following vulnerability has been resolved:

sched: address a potential NULL pointer dereference in the GRED scheduler.

If kzalloc in gred_init returns a NULL pointer, the code follows the
error handling path, invoking gred_destroy. This, in turn, calls
gred_offload, where memset could receive a NULL pointer as input,
potentially leading to a kernel crash.

When table->opt is NULL in gred_init(), gred_change_table_def()
is not called yet, so it is not necessary to call ->ndo_setup_tc()
in gred_offload().
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 5.16 < 6.1.132
Linux ≫ Linux Kernel Version >= 6.2 < 6.6.84
Linux ≫ Linux Kernel Version >= 6.7 < 6.12.20
Linux ≫ Linux Kernel Version >= 6.13 < 6.13.8
Linux ≫ Linux Kernel Version 6.14 Update rc1
Linux ≫ Linux Kernel Version 6.14 Update rc2
Linux ≫ Linux Kernel Version 6.14 Update rc3
Linux ≫ Linux Kernel Version 6.14 Update rc4
Linux ≫ Linux Kernel Version 6.14 Update rc5
Linux ≫ Linux Kernel Version 6.14 Update rc6
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.18% 0.08
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CISA-ADP 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-476 NULL Pointer Dereference

The product dereferences a pointer that it expects to be valid but is NULL.

https://git.kernel.org/stable/c/0f0a152957d64ce45b4c27c687e7d087e8f45079
Patch
https://git.kernel.org/stable/c/115ef44a98220fddfab37a39a19370497cd718b9
Patch
https://git.kernel.org/stable/c/5f996b4f80c2cef1f9c77275055e7fcba44c9199
Patch
https://git.kernel.org/stable/c/68896dd50180b38ea552e49a6a00b685321e5769
Patch
https://git.kernel.org/stable/c/d02c9acd68950a444acda18d514e2b41f846cb7f
Patch
https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html