CVE-2024-36476

RDMA/rtrs: Ensure 'ib_sge list' is accessible

State: Published
Severity: 9.8 Critical
Published: Jan 15, 2025
Updated: Aug 5, 2026
Reserved: Jan 15, 2025

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/

Scores

CVSS	Score	Vector	Source
3.1	9.8 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	Linux
3.1	5.5 Medium	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	CISA-ADP

Weaknesses

CWE-476 NULL Pointer Dereference

Affected Products

Product	Versions
LinuxLinux	9cb837480424e78ed585376f944088246685aec3 to before 7eaa71f56a6f7ab87957213472dc6d4055862722Affected 9cb837480424e78ed585376f944088246685aec3 to before 143378075904e78b3b2a810099bcc3b3d82d762fAffected 9cb837480424e78ed585376f944088246685aec3 to before 32e1e748a85bd52b20b3857d80fd166d22fa455aAffected 9cb837480424e78ed585376f944088246685aec3 to before b238f61cc394d5fef27b26d7d9aa383ebfddabb0Affected 9cb837480424e78ed585376f944088246685aec3 to before 6ffb5c1885195ae5211a12b4acd2d51843ca41b0Affected 9cb837480424e78ed585376f944088246685aec3 to before fb514b31395946022f13a08e06a435f53cf9e8b3Affected
LinuxLinux	5.8Affected before 5.8Not affected 5.10.233 through 5.10.Not affected 5.15.176 through 5.15.Not affected 6.1.124 through 6.1.Not affected 6.6.70 through 6.6.Not affected 6.12.9 through 6.12.*Not affected 6.13 and laterNot affected

Product

Versions

LinuxLinux

9cb837480424e78ed585376f944088246685aec3 to before 7eaa71f56a6f7ab87957213472dc6d4055862722Affected
9cb837480424e78ed585376f944088246685aec3 to before 143378075904e78b3b2a810099bcc3b3d82d762fAffected
9cb837480424e78ed585376f944088246685aec3 to before 32e1e748a85bd52b20b3857d80fd166d22fa455aAffected
9cb837480424e78ed585376f944088246685aec3 to before b238f61cc394d5fef27b26d7d9aa383ebfddabb0Affected
9cb837480424e78ed585376f944088246685aec3 to before 6ffb5c1885195ae5211a12b4acd2d51843ca41b0Affected
9cb837480424e78ed585376f944088246685aec3 to before fb514b31395946022f13a08e06a435f53cf9e8b3Affected

LinuxLinux

5.8Affected
before 5.8Not affected
5.10.233 through 5.10.*Not affected
5.15.176 through 5.15.*Not affected
6.1.124 through 6.1.*Not affected
6.6.70 through 6.6.*Not affected
6.12.9 through 6.12.*Not affected
6.13 and laterNot affected

References

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