CVE-2024-36476

RDMA/rtrs: Ensure 'ib_sge list' is accessible

Description

In the Linux kernel, the following vulnerability has been resolved: RDMA/rtrs: Ensure 'ib_sge list' is accessible Move the declaration of the 'ib_sge list' variable outside the 'always_invalidate' block to ensure it remains accessible for use throughout the function. Previously, 'ib_sge list' was declared within the 'always_invalidate' block, limiting its accessibility, then caused a 'BUG: kernel NULL pointer dereference'[1]. ? __die_body.cold+0x19/0x27 ? page_fault_oops+0x15a/0x2d0 ? search_module_extables+0x19/0x60 ? search_bpf_extables+0x5f/0x80 ? exc_page_fault+0x7e/0x180 ? asm_exc_page_fault+0x26/0x30 ? memcpy_orig+0xd5/0x140 rxe_mr_copy+0x1c3/0x200 [rdma_rxe] ? rxe_pool_get_index+0x4b/0x80 [rdma_rxe] copy_data+0xa5/0x230 [rdma_rxe] rxe_requester+0xd9b/0xf70 [rdma_rxe] ? finish_task_switch.isra.0+0x99/0x2e0 rxe_sender+0x13/0x40 [rdma_rxe] do_task+0x68/0x1e0 [rdma_rxe] process_one_work+0x177/0x330 worker_thread+0x252/0x390 ? __pfx_worker_thread+0x10/0x10 This change ensures the variable is available for subsequent operations that require it. [1] https://lore.kernel.org/linux-rdma/6a1f3e8f-deb0-49f9-bc69-a9b03ecfcda7@fujitsu.com/

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.04%
Affected: Linux Linux
Affected: Linux Linux
Published at:
Updated at:

References

Link Tags
https://git.kernel.org/stable/c/7eaa71f56a6f7ab87957213472dc6d4055862722 patch
https://git.kernel.org/stable/c/143378075904e78b3b2a810099bcc3b3d82d762f patch
https://git.kernel.org/stable/c/32e1e748a85bd52b20b3857d80fd166d22fa455a patch
https://git.kernel.org/stable/c/b238f61cc394d5fef27b26d7d9aa383ebfddabb0 patch
https://git.kernel.org/stable/c/6ffb5c1885195ae5211a12b4acd2d51843ca41b0 patch
https://git.kernel.org/stable/c/fb514b31395946022f13a08e06a435f53cf9e8b3 patch

Frequently Asked Questions

What is the severity of CVE-2024-36476?
CVE-2024-36476 has been scored as a medium severity vulnerability.
How to fix CVE-2024-36476?
To fix CVE-2024-36476, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2024-36476 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2024-36476 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2024-36476?
CVE-2024-36476 affects Linux Linux, Linux Linux.
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