CVE-2025-21980
Published: April 2, 2025Last modified: April 2, 2025
Description
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().
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.5 |
| Attack Vector | LOCAL |
| Attack complexity | LOW |
| Privileges required | LOW |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Fixed (6.1.134-r0) |
| Stream | linux-lts | Fixed (6.6.84-r0) |
References
- https://git.kernel.org/stable/c/0f0a152957d64ce45b4c27c687e7d087e8f45079
- https://git.kernel.org/stable/c/115ef44a98220fddfab37a39a19370497cd718b9
- https://git.kernel.org/stable/c/5f996b4f80c2cef1f9c77275055e7fcba44c9199
- https://git.kernel.org/stable/c/68896dd50180b38ea552e49a6a00b685321e5769
- https://git.kernel.org/stable/c/d02c9acd68950a444acda18d514e2b41f846cb7f