CVE-2026-43469

xprtrdma: Decrement re_receiving on the early exit paths

State: Published
Severity: 7.5 High
Published: May 8, 2026
Updated: Oct 19, 2026
Reserved: May 1, 2026

Description

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

xprtrdma: Decrement re_receiving on the early exit paths

In the event that rpcrdma_post_recvs() fails to create a work request (due to memory allocation failure, say) or otherwise exits early, we should decrement ep->re_receiving before returning. Otherwise we will hang in rpcrdma_xprt_drain() as re_receiving will never reach zero and the completion will never be triggered.

On a system with high memory pressure, this can appear as the following hung task:

INFO: task kworker/u385:17:8393 blocked for more than 122 seconds. Tainted: G S E 6.19.0 #3 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u385:17 state:D stack:0 pid:8393 tgid:8393 ppid:2 task_flags:0x4248060 flags:0x00080000 Workqueue: xprtiod xprt_autoclose [sunrpc] Call Trace: <TASK> __schedule+0x48b/0x18b0 ? ib_post_send_mad+0x247/0xae0 [ib_core] schedule+0x27/0xf0 schedule_timeout+0x104/0x110 __wait_for_common+0x98/0x180 ? __pfx_schedule_timeout+0x10/0x10 wait_for_completion+0x24/0x40 rpcrdma_xprt_disconnect+0x444/0x460 [rpcrdma] xprt_rdma_close+0x12/0x40 [rpcrdma] xprt_autoclose+0x5f/0x120 [sunrpc] process_one_work+0x191/0x3e0 worker_thread+0x2e3/0x420 ? __pfx_worker_thread+0x10/0x10 kthread+0x10d/0x230 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x273/0x2b0 ? __pfx_kthread+0x10/0x10 ret_from_fork_asm+0x1a/0x30

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	Linux

Weaknesses

CWE-667 Improper Locking

Affected Products

Product	Versions
LinuxLinux	15788d1d1077ebe029c48842c738876516d85076 to before 7ea69259a60a364f56cf4aa9e2eafb588d1c762bAffected 15788d1d1077ebe029c48842c738876516d85076 to before 8cb6b5d8296b1f99a8d36849901ebabfe3f749dbAffected 15788d1d1077ebe029c48842c738876516d85076 to before 74c39a47856bddcde7874f2196a00143b5cd0af9Affected 15788d1d1077ebe029c48842c738876516d85076 to before 49f53ee4e25297d886f14e31f355ad1c2735ddfbAffected 15788d1d1077ebe029c48842c738876516d85076 to before 8127b5fec04757c2a41ed65bca0b3266968efd3bAffected 15788d1d1077ebe029c48842c738876516d85076 to before dc3ebd7e2d73dbd4d317785735ffa6c4a6384ddfAffected 15788d1d1077ebe029c48842c738876516d85076 to before 7b6275c80a0c81c5f8943272292dfe67730ce849Affected
LinuxLinux	5.13Affected before 5.13Not affected 5.15.203 through 5.15.Not affected 6.1.167 through 6.1.Not affected 6.6.130 through 6.6.Not affected 6.12.78 through 6.12.Not affected 6.18.19 through 6.18.Not affected 6.19.9 through 6.19.Not affected 7.0 and laterNot affected

Product

Versions

LinuxLinux

15788d1d1077ebe029c48842c738876516d85076 to before 7ea69259a60a364f56cf4aa9e2eafb588d1c762bAffected
15788d1d1077ebe029c48842c738876516d85076 to before 8cb6b5d8296b1f99a8d36849901ebabfe3f749dbAffected
15788d1d1077ebe029c48842c738876516d85076 to before 74c39a47856bddcde7874f2196a00143b5cd0af9Affected
15788d1d1077ebe029c48842c738876516d85076 to before 49f53ee4e25297d886f14e31f355ad1c2735ddfbAffected
15788d1d1077ebe029c48842c738876516d85076 to before 8127b5fec04757c2a41ed65bca0b3266968efd3bAffected
15788d1d1077ebe029c48842c738876516d85076 to before dc3ebd7e2d73dbd4d317785735ffa6c4a6384ddfAffected
15788d1d1077ebe029c48842c738876516d85076 to before 7b6275c80a0c81c5f8943272292dfe67730ce849Affected

LinuxLinux

5.13Affected
before 5.13Not affected
5.15.203 through 5.15.*Not affected
6.1.167 through 6.1.*Not affected
6.6.130 through 6.6.*Not affected
6.12.78 through 6.12.*Not affected
6.18.19 through 6.18.*Not affected
6.19.9 through 6.19.*Not affected
7.0 and laterNot affected

References

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