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CVE-2023-53419— rcu: Protect rcu_print_task_exp_stall() ->exp_tasks access

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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，该漏洞源于未正确保护rcu_print_task_exp_stall函数对exp_tasks的访问，可能导致空指针取消引用。

AI Predicted 5.5 Difficulty: Hard EPSS 0.16% · P5

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux 314eeb43e5f22856b281c91c966e51e5782a3498< a7d21b8585894e6fff973f6ddae42f02b13f600f affected
314eeb43e5f22856b281c91c966e51e5782a3498< e30a55e98ae6c44253d8b129efefd5da5bc6e3bc affected
314eeb43e5f22856b281c91c966e51e5782a3498< d0a8c0e31a09ec1efd53079083e2a677956b4d91 affected
314eeb43e5f22856b281c91c966e51e5782a3498< 2bc0ae94ef1f9ed322d8ee439de3239ea3632ab2 affected
314eeb43e5f22856b281c91c966e51e5782a3498< 3c1566bca3f8349f12b75d0a2d5e4a20ad6262ec affected
5.8 affected
< 5.8 unaffected
5.10.181≤ 5.10.* unaffected
… +4 more rows
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I. Basic Information for CVE-2023-53419

Vulnerability Information
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Vulnerability Title
rcu: Protect rcu_print_task_exp_stall() ->exp_tasks access
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: rcu: Protect rcu_print_task_exp_stall() ->exp_tasks access For kernels built with CONFIG_PREEMPT_RCU=y, the following scenario can result in a NULL-pointer dereference: CPU1 CPU2 rcu_preempt_deferred_qs_irqrestore rcu_print_task_exp_stall if (special.b.blocked) READ_ONCE(rnp->exp_tasks) != NULL raw_spin_lock_rcu_node np = rcu_next_node_entry(t, rnp) if (&t->rcu_node_entry == rnp->exp_tasks) WRITE_ONCE(rnp->exp_tasks, np) .... raw_spin_unlock_irqrestore_rcu_node raw_spin_lock_irqsave_rcu_node t = list_entry(rnp->exp_tasks->prev, struct task_struct, rcu_node_entry) (if rnp->exp_tasks is NULL, this will dereference a NULL pointer) The problem is that CPU2 accesses the rcu_node structure's->exp_tasks field without holding the rcu_node structure's ->lock and CPU2 did not observe CPU1's change to rcu_node structure's ->exp_tasks in time. Therefore, if CPU1 sets rcu_node structure's->exp_tasks pointer to NULL, then CPU2 might dereference that NULL pointer. This commit therefore holds the rcu_node structure's ->lock while accessing that structure's->exp_tasks field. [ paulmck: Apply Frederic Weisbecker feedback. ]
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
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，该漏洞源于未正确保护rcu_print_task_exp_stall函数对exp_tasks的访问，可能导致空指针取消引用。
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux 314eeb43e5f22856b281c91c966e51e5782a3498 ~ a7d21b8585894e6fff973f6ddae42f02b13f600f -
Linux Linux 5.8 -

II. Public POCs for CVE-2023-53419

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III. Intelligence Information for CVE-2023-53419

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Same Patch Batch · Linux · 2025-09-18 · 121 CVEs total

CVE-2023-53382 9.8 CRITICAL net/smc: Reset connection when trying to use SMCRv2 fails.
CVE-2022-50401 9.8 CRITICAL nfsd: under NFSv4.1, fix double svc_xprt_put on rpc_create failure
CVE-2022-50410 9.8 CRITICAL NFSD: Protect against send buffer overflow in NFSv2 READ
CVE-2022-50413 8.8 HIGH wifi: mac80211: fix use-after-free
CVE-2022-50419 8.8 HIGH Bluetooth: hci_sysfs: Fix attempting to call device_add multiple times
CVE-2023-53374 8.8 HIGH Bluetooth: hci_conn: fail SCO/ISO via hci_conn_failed if ACL gone early
CVE-2022-50386 8.8 HIGH Bluetooth: L2CAP: Fix user-after-free
CVE-2023-53431 8.8 HIGH scsi: ses: Handle enclosure with just a primary component gracefully
CVE-2023-53432 8.8 HIGH firewire: net: fix use after free in fwnet_finish_incoming_packet()
CVE-2023-53372 8.2 HIGH sctp: fix a potential overflow in sctp_ifwdtsn_skip
CVE-2023-53398 7.8 HIGH mlx5: fix possible ptp queue fifo use-after-free
CVE-2023-53426 7.8 HIGH xsk: Fix xsk_diag use-after-free error during socket cleanup
CVE-2023-53378 7.8 HIGH drm/i915/dpt: Treat the DPT BO as a framebuffer
CVE-2023-53377 7.8 HIGH cifs: prevent use-after-free by freeing the cfile later
CVE-2023-53376 7.8 HIGH scsi: mpi3mr: Use number of bits to manage bitmap sizes
CVE-2023-53373 7.8 HIGH crypto: seqiv - Handle EBUSY correctly
CVE-2023-53429 7.8 HIGH btrfs: don't check PageError in __extent_writepage
CVE-2022-50399 7.8 HIGH media: atomisp: prevent integer overflow in sh_css_set_black_frame()
CVE-2022-50411 7.8 HIGH ACPICA: Fix error code path in acpi_ds_call_control_method()
CVE-2022-50384 7.8 HIGH staging: vme_user: Fix possible UAF in tsi148_dma_list_add

Showing top 20 of 121 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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