linux-cve-announce - CVE-2025-38024: RDMA/rxe: Fix slab-use-after-free Read in rxe_queue

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Message-ID: <2025061847-CVE-2025-38024-2904@gregkh>
Date: Wed, 18 Jun 2025 11:28:58 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-38024: RDMA/rxe: Fix slab-use-after-free Read in rxe_queue_cleanup bug

From: Greg Kroah-Hartman <gregkh@...nel.org>

Description
===========

In the Linux kernel, the following vulnerability has been resolved:

RDMA/rxe: Fix slab-use-after-free Read in rxe_queue_cleanup bug

Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x7d/0xa0 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0xcf/0x610 mm/kasan/report.c:489
 kasan_report+0xb5/0xe0 mm/kasan/report.c:602
 rxe_queue_cleanup+0xd0/0xe0 drivers/infiniband/sw/rxe/rxe_queue.c:195
 rxe_cq_cleanup+0x3f/0x50 drivers/infiniband/sw/rxe/rxe_cq.c:132
 __rxe_cleanup+0x168/0x300 drivers/infiniband/sw/rxe/rxe_pool.c:232
 rxe_create_cq+0x22e/0x3a0 drivers/infiniband/sw/rxe/rxe_verbs.c:1109
 create_cq+0x658/0xb90 drivers/infiniband/core/uverbs_cmd.c:1052
 ib_uverbs_create_cq+0xc7/0x120 drivers/infiniband/core/uverbs_cmd.c:1095
 ib_uverbs_write+0x969/0xc90 drivers/infiniband/core/uverbs_main.c:679
 vfs_write fs/read_write.c:677 [inline]
 vfs_write+0x26a/0xcc0 fs/read_write.c:659
 ksys_write+0x1b8/0x200 fs/read_write.c:731
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xaa/0x1b0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

In the function rxe_create_cq, when rxe_cq_from_init fails, the function
rxe_cleanup will be called to handle the allocated resources. In fact,
some memory resources have already been freed in the function
rxe_cq_from_init. Thus, this problem will occur.

The solution is to let rxe_cleanup do all the work.

The Linux kernel CVE team has assigned CVE-2025-38024 to this issue.


Affected and fixed versions
===========================

	Issue introduced in 4.8 with commit 8700e3e7c4857d28ebaa824509934556da0b3e76 and fixed in 5.4.294 with commit 7c7c80c32e00665234e373ab03fe82f5c5c2c230
	Issue introduced in 4.8 with commit 8700e3e7c4857d28ebaa824509934556da0b3e76 and fixed in 5.10.238 with commit 3a3b73e135e3bd18423d0baa72571319c7feb759
	Issue introduced in 4.8 with commit 8700e3e7c4857d28ebaa824509934556da0b3e76 and fixed in 5.15.184 with commit f8f470e3a757425a8f98fb9a5991e3cf62fc7134
	Issue introduced in 4.8 with commit 8700e3e7c4857d28ebaa824509934556da0b3e76 and fixed in 6.1.140 with commit 52daccfc3fa68ee1902d52124921453d7a335591
	Issue introduced in 4.8 with commit 8700e3e7c4857d28ebaa824509934556da0b3e76 and fixed in 6.6.92 with commit ee4c5a2a38596d548566560c0c022ab797e6f71a
	Issue introduced in 4.8 with commit 8700e3e7c4857d28ebaa824509934556da0b3e76 and fixed in 6.12.30 with commit 336edd6b0f5b7fbffc3e065285610624f59e88df
	Issue introduced in 4.8 with commit 8700e3e7c4857d28ebaa824509934556da0b3e76 and fixed in 6.14.8 with commit 16c45ced0b3839d3eee72a86bb172bef6cf58980
	Issue introduced in 4.8 with commit 8700e3e7c4857d28ebaa824509934556da0b3e76 and fixed in 6.15 with commit f81b33582f9339d2dc17c69b92040d3650bb4bae

Please see https://www.kernel.org for a full list of currently supported
kernel versions by the kernel community.

Unaffected versions might change over time as fixes are backported to
older supported kernel versions.  The official CVE entry at
	https://cve.org/CVERecord/?id=CVE-2025-38024
will be updated if fixes are backported, please check that for the most
up to date information about this issue.


Affected files
==============

The file(s) affected by this issue are:
	drivers/infiniband/sw/rxe/rxe_cq.c


Mitigation
==========

The Linux kernel CVE team recommends that you update to the latest
stable kernel version for this, and many other bugfixes.  Individual
changes are never tested alone, but rather are part of a larger kernel
release.  Cherry-picking individual commits is not recommended or
supported by the Linux kernel community at all.  If however, updating to
the latest release is impossible, the individual changes to resolve this
issue can be found at these commits:
	https://git.kernel.org/stable/c/7c7c80c32e00665234e373ab03fe82f5c5c2c230
	https://git.kernel.org/stable/c/3a3b73e135e3bd18423d0baa72571319c7feb759
	https://git.kernel.org/stable/c/f8f470e3a757425a8f98fb9a5991e3cf62fc7134
	https://git.kernel.org/stable/c/52daccfc3fa68ee1902d52124921453d7a335591
	https://git.kernel.org/stable/c/ee4c5a2a38596d548566560c0c022ab797e6f71a
	https://git.kernel.org/stable/c/336edd6b0f5b7fbffc3e065285610624f59e88df
	https://git.kernel.org/stable/c/16c45ced0b3839d3eee72a86bb172bef6cf58980
	https://git.kernel.org/stable/c/f81b33582f9339d2dc17c69b92040d3650bb4bae