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().
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
f25c0515c521375154c62c72447869f40218c861 to < d02c9acd68950a444acda18d514e2b41f846cb7faffectedf25c0515c521375154c62c72447869f40218c861 to < 0f0a152957d64ce45b4c27c687e7d087e8f45079affectedf25c0515c521375154c62c72447869f40218c861 to < 68896dd50180b38ea552e49a6a00b685321e5769affectedf25c0515c521375154c62c72447869f40218c861 to < 5f996b4f80c2cef1f9c77275055e7fcba44c9199affectedf25c0515c521375154c62c72447869f40218c861 to < 115ef44a98220fddfab37a39a19370497cd718b9affected
Linux Linux
Default version status: affected
5.16affected0 to < 5.16unaffected6.1.132 to ≤ 6.1.*unaffected6.6.84 to ≤ 6.6.*unaffected6.12.20 to ≤ 6.12.*unaffected6.13.8 to ≤ 6.13.*unaffected6.14 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/d02c9acd68950a444acda18d514e2b41f846cb7f ↗
- https://git.kernel.org/stable/c/0f0a152957d64ce45b4c27c687e7d087e8f45079 ↗
- https://git.kernel.org/stable/c/68896dd50180b38ea552e49a6a00b685321e5769 ↗
- https://git.kernel.org/stable/c/5f996b4f80c2cef1f9c77275055e7fcba44c9199 ↗
- https://git.kernel.org/stable/c/115ef44a98220fddfab37a39a19370497cd718b9 ↗
- https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html ↗