CVE-2025-21981 Information

Description

In the Linux kernel the following vulnerability has been resolved:

ice: fix memory leak in aRFS after reset

Fix aRFS (accelerated Receive Flow Steering) structures memory leak by adding a checker to verify if aRFS memory is already allocated while configuring VSI. aRFS objects are allocated in two cases:

• as part of VSI initialization (at probe) and
• as part of reset handling

However VSI reconfiguration executed during reset involves memory allocation one more time without prior releasing already allocated resources. This led to the memory leak with the following signature:

[root@os-delivery ~] cat /sys/kernel/debug/kmemleak unreferenced object 0xff3c1ca7252e6000 (size 8192): comm \kworker/0:0\ pid 8 jiffies 4296833052 hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ……………. 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ……………. backtrace (crc 0): [] __kmalloc_cache_noprof+0x275/0x340 [] ice_init_arfs+0x3a/0xe0 [ice] [] ice_vsi_cfg_def+0x607/0x850 [ice] [] ice_vsi_setup+0x5b/0x130 [ice] [] ice_init+0x1c1/0x460 [ice] [] ice_probe+0x2af/0x520 [ice] [] local_pci_probe+0x43/0xa0 [] work_for_cpu_fn+0x13/0x20 [] process_one_work+0x179/0x390 [] worker_thread+0x239/0x340 [] kthread+0xcc/0x100 [] ret_from_fork+0x2d/0x50 [] ret_from_fork_asm+0x1a/0x30 …

Reference

https://git.kernel.org/stable/c/23d97f18901ef5e4e264e3b1777fe65c760186b5 https://git.kernel.org/stable/c/3b27e6e10a32589fcd293b8933ab6de9387a460e https://git.kernel.org/stable/c/5d30d256661fc11b6e73fac6c3783a702e1006a3 https://git.kernel.org/stable/c/78f3d64b30210c0e521c59357431aca14024cb79 https://git.kernel.org/stable/c/fcbacc47d16306c87ad1b820b7a575f6e9eae58b