CVE-2025-21829 [Medium] | Security Vulnerability in Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: RDMA/rxe: Fix the warning "__rxe_cleanup+0x12c/0x170 [rdma_rxe]" The Call Trace is as below: " <TASK> ? show_regs.cold+0x1a/0x1f ? __rxe_cleanup+0x12c/0x170 [rdma_rxe] ? __warn+0x84/0xd0 ? __rxe_cleanup+0x12c/0x170 [rdma_rxe] ? report_bug+0x105/0x180 ? handle_bug+0x46/0x80 ? exc_invalid_op+0x19/0x70 ? asm_exc_invalid_op+0x1b/0x20 ? __rxe_cleanup+0x12c/0x170 [rdma_rxe] ? __rxe_cleanup+0x124/0x170 [rdma_rxe] rxe_destroy_qp.cold+0x24/0x29 [rdma_rxe] ib_destroy_qp_user+0x118/0x190 [ib_core] rdma_destroy_qp.cold+0x43/0x5e [rdma_cm] rtrs_cq_qp_destroy.cold+0x1d/0x2b [rtrs_core] rtrs_srv_close_work.cold+0x1b/0x31 [rtrs_server] process_one_work+0x21d/0x3f0 worker_thread+0x4a/0x3c0 ? process_one_work+0x3f0/0x3f0 kthread+0xf0/0x120 ? kthread_complete_and_exit+0x20/0x20 ret_from_fork+0x22/0x30 </TASK> " When too many rdma resources are allocated, rxe needs more time to handle these rdma resources. Sometimes with the current timeout, rxe can not release the rdma resources correctly. Compared with other rdma drivers, a bigger timeout is used.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2025-11-20	0.05%	0.03%	-0.02%
2	2025-11-18	0.03%	0.05%	+0.03%
3	2025-10-30	—	0.03%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2025-11-20

0.05%

0.03%

-0.02%

2025-11-18

0.03%

0.05%

+0.03%

2025-10-30

—

0.03%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
5.5	3.1	MEDIUM	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H` Click to expand Attack vector (AV:L) They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:L) A normal user session is enough; they don’t have to be admin. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	1.8	3.6	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

5.5

3.1

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Click to expand

Attack vector (AV:L): They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L): A normal user session is enough; they don’t have to be admin.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:N): Data isn’t meaningfully altered or forged.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

1.8

3.6

[email protected]

OS Trackers for CVE-2025-21829

vendor	priority	summary	link
`debian`	unimportant	CVE-2025-21829 unimportant priority: Debian including 2 source packages (linux, linux-6.1), 6 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 6.	https://security-tracker.debian.org/tracker/CVE-2025-21829
`redhat`	low	—	https://access.redhat.com/security/cve/CVE-2025-21829
`suse`	medium	CVE-2025-21829 severity moderate: SUSE including 418 source package names (2.1.3-6.11:kernel-default-6.4.0-28.1, 2.1.3-6.12:kernel-default-base-6.4.0-28.1.21.6, …), 808 product×package rows across 144 product lines (Container suse/sl-micro/6.0/base-os-container, Container suse/sl-micro/6.0/kvm-os-container, … (144 product lines)): Fixed 361, Known Affected 231, Known Not Affected 216.	https://www.suse.com/security/cve/CVE-2025-21829/
`ubuntu`	medium	CVE-2025-21829 medium priority: Ubuntu including 150 source packages (linux, linux-allwinner-5.19, …), 1487 status rows across 10 suites (bionic, focal, jammy, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 1097, ignored 148, released 128, not-affected 114.	https://ubuntu.com/security/CVE-2025-21829

Affected software / configurations for CVE-2025-21829

Vendor	Product	Version	Raw CPE
linux	linux_kernel	>= 6.0, < 6.1.129	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 6.2, < 6.6.76	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 6.7, < 6.12.13	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 6.13, < 6.13.2	cpe:2.3:o:linux:linux_kernel::::::::

References for CVE-2025-21829

URL	Tags
https://git.kernel.org/stable/c/45e567800492088bc52c9abac35524b4d332a8f8	Patch
https://git.kernel.org/stable/c/720653309dd31c8a927ef5d87964578ad544980f	Patch
https://git.kernel.org/stable/c/7a2de8126ed3801f2396720e10a03cd546a3cea1	Patch
https://git.kernel.org/stable/c/a7d15eaecf0d6e13226db629ae2401c8c02683e5	Patch
https://git.kernel.org/stable/c/edc4ef0e0154096d6c0cf5e06af6fc330dbad9d1	Patch
https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html

URL

CVE-2025-21829 | RDMA/rxe: Fix the warning "__rxe_cleanup+0x12c/0x170 [rdma_rxe]"

Exploit prediction scoring system (EPSS) score for CVE-2025-21829

Common vulnerability scoring system (CVSS) metrics for CVE-2025-21829

Weakness enumeration for CVE-2025-21829

OS Trackers for CVE-2025-21829

Affected software / configurations for CVE-2025-21829

References for CVE-2025-21829