Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1000 CNY

100.0%
Buy Us a Coffee

CVE-2025-71132— smc91x: fix broken irq-context in PREEMPT_RT

EPSS 0.03% · P7
Get alerts for future matching vulnerabilitiesLog in to subscribe

I. Basic Information for CVE-2025-71132

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
smc91x: fix broken irq-context in PREEMPT_RT
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: smc91x: fix broken irq-context in PREEMPT_RT When smc91x.c is built with PREEMPT_RT, the following splat occurs in FVP_RevC: [ 13.055000] smc91x LNRO0003:00 eth0: link up, 10Mbps, half-duplex, lpa 0x0000 [ 13.062137] BUG: workqueue leaked atomic, lock or RCU: kworker/2:1[106] [ 13.062137] preempt=0x00000000 lock=0->0 RCU=0->1 workfn=mld_ifc_work [ 13.062266] C ** replaying previous printk message ** [ 13.062266] CPU: 2 UID: 0 PID: 106 Comm: kworker/2:1 Not tainted 6.18.0-dirty #179 PREEMPT_{RT,(full)} [ 13.062353] Hardware name: , BIOS [ 13.062382] Workqueue: mld mld_ifc_work [ 13.062469] Call trace: [ 13.062494] show_stack+0x24/0x40 (C) [ 13.062602] __dump_stack+0x28/0x48 [ 13.062710] dump_stack_lvl+0x7c/0xb0 [ 13.062818] dump_stack+0x18/0x34 [ 13.062926] process_scheduled_works+0x294/0x450 [ 13.063043] worker_thread+0x260/0x3d8 [ 13.063124] kthread+0x1c4/0x228 [ 13.063235] ret_from_fork+0x10/0x20 This happens because smc_special_trylock() disables IRQs even on PREEMPT_RT, but smc_special_unlock() does not restore IRQs on PREEMPT_RT. The reason is that smc_special_unlock() calls spin_unlock_irqrestore(), and rcu_read_unlock_bh() in __dev_queue_xmit() cannot invoke rcu_read_unlock() through __local_bh_enable_ip() when current->softirq_disable_cnt becomes zero. To address this issue, replace smc_special_trylock() with spin_trylock_irqsave().
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，该漏洞源于中断上下文处理不当，可能导致工作队列泄漏原子操作、锁或RCU。
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

VendorProductAffected VersionsCPESubscribe
LinuxLinux 342a93247e0837101f27bbcca26f402902df98dc ~ 1c4cb705e733250d13243f6a69b8b5a92e39b9f6 -
LinuxLinux 5.15 -

II. Public POCs for CVE-2025-71132

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2025-71132

请登录查看更多情报信息。

Same Patch Batch · Linux · 2026-01-14 · 43 CVEs total

CVE-2025-71112net: hns3: add VLAN id validation before using
CVE-2025-71122iommufd/selftest: Check for overflow in IOMMU_TEST_OP_ADD_RESERVED
CVE-2025-71108usb: typec: ucsi: Handle incorrect num_connectors capability
CVE-2025-71110mm/slub: reset KASAN tag in defer_free() before accessing freed memory
CVE-2025-71109MIPS: ftrace: Fix memory corruption when kernel is located beyond 32 bits
CVE-2025-71105f2fs: use global inline_xattr_slab instead of per-sb slab cache
CVE-2025-71104KVM: x86: Fix VM hard lockup after prolonged inactivity with periodic HV timer
CVE-2025-71103drm/msm: adreno: fix deferencing ifpc_reglist when not declared
CVE-2025-71102scs: fix a wrong parameter in __scs_magic
CVE-2025-71106fs: PM: Fix reverse check in filesystems_freeze_callback()
CVE-2025-71111hwmon: (w83791d) Convert macros to functions to avoid TOCTOU
CVE-2025-71113crypto: af_alg - zero initialize memory allocated via sock_kmalloc
CVE-2025-71114via_wdt: fix critical boot hang due to unnamed resource allocation
CVE-2025-71115um: init cpu_tasks[] earlier
CVE-2025-71116libceph: make decode_pool() more resilient against corrupted osdmaps
CVE-2025-71117block: Remove queue freezing from several sysfs store callbacks
CVE-2025-71118ACPICA: Avoid walking the Namespace if start_node is NULL
CVE-2025-71120SUNRPC: svcauth_gss: avoid NULL deref on zero length gss_token in gss_read_proxy_verf
CVE-2025-71119powerpc/kexec: Enable SMT before waking offline CPUs
CVE-2025-71121parisc: Do not reprogram affinitiy on ASP chip

Showing top 20 of 43 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-71132

Anonymous User
2026-01-15 06:08:11

Zaproxy alias impedit expedita quisquam pariatur exercitationem. Nemo rerum eveniet dolores rem quia dignissimos.

Leave a comment