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CVE-2025-38525— rxrpc: Fix irq-disabled in local_bh_enable()

CVSS 7.5 · High EPSS 0.36% · P29

Affected Version Matrix 12

VendorProductVersion RangeStatus
LinuxLinux77433b730970ca6e51d03016e830d8ab1b22685a< d94b82d452ca27a200cd67660dc48476386651d8affected
09c59a82298f424f6212c67fbea531853e88ce6c< 8ac0b3baa7d8f732bd9e5cbf1d8b57e4802c6b36affected
a2ea9a9072607c2fd6442bd1ffb4dbdbf882aed7< 2029f21f10dedb88c0f86abffcf8d6c21dcf6040affected
a2ea9a9072607c2fd6442bd1ffb4dbdbf882aed7< e4d2878369d590bf8455e3678a644e503172eafaaffected
6.6.148< 6.6.151affected
6.12.101< 6.12.103affected
6.14affected
< 6.14unaffected
… +4 more rows
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I. Basic Information for CVE-2025-38525

Vulnerability Information
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Vulnerability Title
rxrpc: Fix irq-disabled in local_bh_enable()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix irq-disabled in local_bh_enable() The rxrpc_assess_MTU_size() function calls down into the IP layer to find out the MTU size for a route. When accepting an incoming call, this is called from rxrpc_new_incoming_call() which holds interrupts disabled across the code that calls down to it. Unfortunately, the IP layer uses local_bh_enable() which, config dependent, throws a warning if IRQs are enabled: WARNING: CPU: 1 PID: 5544 at kernel/softirq.c:387 __local_bh_enable_ip+0x43/0xd0 ... RIP: 0010:__local_bh_enable_ip+0x43/0xd0 ... Call Trace: <TASK> rt_cache_route+0x7e/0xa0 rt_set_nexthop.isra.0+0x3b3/0x3f0 __mkroute_output+0x43a/0x460 ip_route_output_key_hash+0xf7/0x140 ip_route_output_flow+0x1b/0x90 rxrpc_assess_MTU_size.isra.0+0x2a0/0x590 rxrpc_new_incoming_peer+0x46/0x120 rxrpc_alloc_incoming_call+0x1b1/0x400 rxrpc_new_incoming_call+0x1da/0x5e0 rxrpc_input_packet+0x827/0x900 rxrpc_io_thread+0x403/0xb60 kthread+0x2f7/0x310 ret_from_fork+0x2a/0x230 ret_from_fork_asm+0x1a/0x30 ... hardirqs last enabled at (23): _raw_spin_unlock_irq+0x24/0x50 hardirqs last disabled at (24): _raw_read_lock_irq+0x17/0x70 softirqs last enabled at (0): copy_process+0xc61/0x2730 softirqs last disabled at (25): rt_add_uncached_list+0x3c/0x90 Fix this by moving the call to rxrpc_assess_MTU_size() out of rxrpc_init_peer() and further up the stack where it can be done without interrupts disabled. It shouldn't be a problem for rxrpc_new_incoming_call() to do it after the locks are dropped as pmtud is going to be performed by the I/O thread - and we're in the I/O thread at this point.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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rxrpc在IRQ禁用时调用local_bh_enable，可能导致警告。
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 77433b730970ca6e51d03016e830d8ab1b22685a ~ d94b82d452ca27a200cd67660dc48476386651d8 -
LinuxLinux 6.14 -

II. Public POCs for CVE-2025-38525

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III. Intelligence Information for CVE-2025-38525

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Patches & Fixes for CVE-2025-38525 (3)

Same Patch Batch · Linux · 2025-08-16 · 59 CVEs total

CVE-2025-385339.8 CRITICALnet: libwx: fix the using of Rx buffer DMA
CVE-2025-385279.8 CRITICALsmb: client: fix use-after-free in cifs_oplock_break
CVE-2025-385529.4 CRITICALmptcp: plug races between subflow fail and subflow creation
CVE-2023-38679.1 CRITICALksmbd: fix out of bounds read in smb2_sess_setup
CVE-2023-45159.1 CRITICALksmbd: validate command request size
CVE-2023-322499.1 CRITICALksmbd: not allow guest user on multichannel
CVE-2025-385128.8 HIGHwifi: prevent A-MSDU attacks in mesh networks
CVE-2025-385118.8 HIGHdrm/xe/pf: Clear all LMTT pages on alloc
CVE-2023-41308.1 HIGHksmbd: fix wrong next length validation of ea buffer in smb2_set_ea()
CVE-2023-38658.1 HIGHksmbd: fix out-of-bound read in smb2_write
CVE-2025-385507.8 HIGHipv6: mcast: Delay put pmc->idev in mld_del_delrec()
CVE-2025-385027.8 HIGHbpf: Fix oob access in cgroup local storage
CVE-2025-385327.8 HIGHnet: libwx: properly reset Rx ring descriptor
CVE-2025-385427.8 HIGHnet: appletalk: Fix device refcount leak in atrtr_create()
CVE-2025-385367.8 HIGHnet: airoha: fix potential use-after-free in airoha_npu_get()
CVE-2025-385397.8 HIGHtracing: Add down_write(trace_event_sem) when adding trace event
CVE-2025-385017.5 HIGHksmbd: limit repeated connections from clients with the same IP
CVE-2025-385147.5 HIGHrxrpc: Fix oops due to non-existence of prealloc backlog struct
CVE-2025-385267.5 HIGHice: add NULL check in eswitch lag check
CVE-2025-385237.5 HIGHcifs: Fix the smbd_response slab to allow usercopy

Showing top 20 of 59 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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