| Name | CVE-2025-21980 |
| 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(). |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DSA-5900-1 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| linux (PTS) | bullseye | 5.10.223-1 | fixed |
| bullseye (security) | 5.10.234-1 | fixed | |
| bookworm | 6.1.129-1 | vulnerable | |
| bookworm (security) | 6.1.135-1 | fixed | |
| trixie | 6.12.22-1 | fixed | |
| sid | 6.12.25-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| linux | source | bullseye | (not affected) | |||
| linux | source | bookworm | 6.1.133-1 | DSA-5900-1 | ||
| linux | source | (unstable) | 6.12.20-1 |
[bullseye] - linux <not-affected> (Vulnerable code not present)
https://git.kernel.org/linus/115ef44a98220fddfab37a39a19370497cd718b9 (6.14-rc7)