CVE-2021-47569— io_uring: fail cancellation for EXITING tasks
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I. Basic Information for CVE-2021-47569
Vulnerability Information
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Vulnerability Title
io_uring: fail cancellation for EXITING tasks
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: io_uring: fail cancellation for EXITING tasks WARNING: CPU: 1 PID: 20 at fs/io_uring.c:6269 io_try_cancel_userdata+0x3c5/0x640 fs/io_uring.c:6269 CPU: 1 PID: 20 Comm: kworker/1:0 Not tainted 5.16.0-rc1-syzkaller #0 Workqueue: events io_fallback_req_func RIP: 0010:io_try_cancel_userdata+0x3c5/0x640 fs/io_uring.c:6269 Call Trace: <TASK> io_req_task_link_timeout+0x6b/0x1e0 fs/io_uring.c:6886 io_fallback_req_func+0xf9/0x1ae fs/io_uring.c:1334 process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298 worker_thread+0x658/0x11f0 kernel/workqueue.c:2445 kthread+0x405/0x4f0 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 </TASK> We need original task's context to do cancellations, so if it's dying and the callback is executed in a fallback mode, fail the cancellation attempt.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel 存在安全漏洞，该漏洞源于 io_uring 模块EXITING 任务取消失败。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2021-47569
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Same Patch Batch · Linux · 2024-05-24 · 73 CVEs total
| CVE-2021-47547 | net: tulip: de4x5: fix the problem that the array 'lp->phy[8]' may be out of bound | |
| CVE-2021-47568 | ksmbd: fix memleak in get_file_stream_info() | |
| CVE-2021-47566 | proc/vmcore: fix clearing user buffer by properly using clear_user() | |
| CVE-2021-47555 | net: vlan: fix underflow for the real_dev refcnt | |
| CVE-2021-47553 | sched/scs: Reset task stack state in bringup_cpu() | |
| CVE-2021-47551 | drm/amd/amdkfd: Fix kernel panic when reset failed and been triggered again | |
| CVE-2021-47552 | blk-mq: cancel blk-mq dispatch work in both blk_cleanup_queue and disk_release() | |
| CVE-2021-47550 | drm/amd/amdgpu: fix potential memleak | |
| CVE-2021-47548 | ethernet: hisilicon: hns: hns_dsaf_misc: fix a possible array overflow in hns_dsaf_ge_srst | |
| CVE-2021-47549 | sata_fsl: fix UAF in sata_fsl_port_stop when rmmod sata_fsl | |
| CVE-2021-47554 | vdpa_sim: avoid putting an uninitialized iova_domain | |
| CVE-2021-47546 | ipv6: fix memory leak in fib6_rule_suppress | |
| CVE-2021-47544 | tcp: fix page frag corruption on page fault | |
| CVE-2021-47542 | net: qlogic: qlcnic: Fix a NULL pointer dereference in qlcnic_83xx_add_rings() | |
| CVE-2021-47541 | net/mlx4_en: Fix an use-after-free bug in mlx4_en_try_alloc_resources() | |
| CVE-2021-47540 | mt76: mt7915: fix NULL pointer dereference in mt7915_get_phy_mode | |
| CVE-2021-47539 | rxrpc: Fix rxrpc_peer leak in rxrpc_look_up_bundle() | |
| CVE-2021-47538 | rxrpc: Fix rxrpc_local leak in rxrpc_lookup_peer() | |
| CVE-2021-47536 | net/smc: fix wrong list_del in smc_lgr_cleanup_early | |
| CVE-2021-47537 | octeontx2-af: Fix a memleak bug in rvu_mbox_init() |
Showing top 20 of 73 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
Same vendor: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
V. Comments for CVE-2021-47569
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