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CVE-2026-31550— pmdomain: bcm: bcm2835-power: Increase ASB control timeout

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bcm2835_asb_control函数轮询超时不足，可能导致V3D主ASB握手失败，造成运行时PM挂起时电源关闭失败，进而导致总线故障或系统挂起。

AI Predicted 5.3 Difficulty: Easy EPSS 0.16% · P5

Possible ATT&CK Techniques 1 AI

T1014 · Rootkit

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 670c672608a1ffcbc7ac0f872734843593bb8b15< 0e84e74849d2d7e9b23a09c2d5e0d9357db1ca59 affected
670c672608a1ffcbc7ac0f872734843593bb8b15< c5e734f6a0740dce92e7c919e632cb43fa5d4e53 affected
670c672608a1ffcbc7ac0f872734843593bb8b15< 622ab02e955c35c125ff2b65d8327b2c52db8758 affected
670c672608a1ffcbc7ac0f872734843593bb8b15< 9443202d91388026dbf7312972a74fbfd27ee82f affected
670c672608a1ffcbc7ac0f872734843593bb8b15< ea4fa54b83bb2e4a21e9026824bfe271b1a6ee1e affected
670c672608a1ffcbc7ac0f872734843593bb8b15< 18605b1b936b66b1f34dcf8e9ad4f1fbcf7a7c13 affected
670c672608a1ffcbc7ac0f872734843593bb8b15< 572f17180f26619809b8e0593d926762aa8660ff affected
670c672608a1ffcbc7ac0f872734843593bb8b15< b826d2c0b0ecb844c84431ba6b502e744f5d919a affected
… +10 more rows
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I. Basic Information for CVE-2026-31550

Vulnerability Information
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Vulnerability Title
pmdomain: bcm: bcm2835-power: Increase ASB control timeout
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: pmdomain: bcm: bcm2835-power: Increase ASB control timeout The bcm2835_asb_control() function uses a tight polling loop to wait for the ASB bridge to acknowledge a request. During intensive workloads, this handshake intermittently fails for V3D's master ASB on BCM2711, resulting in "Failed to disable ASB master for v3d" errors during runtime PM suspend. As a consequence, the failed power-off leaves V3D in a broken state, leading to bus faults or system hangs on later accesses. As the timeout is insufficient in some scenarios, increase the polling timeout from 1us to 5us, which is still negligible in the context of a power domain transition. Also, replace the open-coded ktime_get_ns()/ cpu_relax() polling loop with readl_poll_timeout_atomic().
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bcm2835_asb_control函数轮询超时不足，可能导致V3D主ASB握手失败，造成运行时PM挂起时电源关闭失败，进而导致总线故障或系统挂起。
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 670c672608a1ffcbc7ac0f872734843593bb8b15 ~ 0e84e74849d2d7e9b23a09c2d5e0d9357db1ca59 -
Linux Linux 5.1 -

II. Public POCs for CVE-2026-31550

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III. Intelligence Information for CVE-2026-31550

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Same Patch Batch · Linux · 2026-04-24 · 138 CVEs total

CVE-2026-31609 9.8 CRITICAL smb: client: avoid double-free in smbd_free_send_io() after smbd_send_batch_flush()
CVE-2026-31657 9.8 CRITICAL batman-adv: hold claim backbone gateways by reference
CVE-2026-31633 9.8 CRITICAL rxrpc: Fix integer overflow in rxgk_verify_response()
CVE-2026-31608 9.8 CRITICAL smb: server: avoid double-free in smb_direct_free_sendmsg after smb_direct_flush_send_list
CVE-2026-31669 9.8 CRITICAL mptcp: fix slab-use-after-free in __inet_lookup_established
CVE-2026-31668 9.8 CRITICAL seg6: separate dst_cache for input and output paths in seg6 lwtunnel
CVE-2026-31536 9.8 CRITICAL smb: server: let send_done handle a completion without IB_SEND_SIGNALED
CVE-2026-31659 9.8 CRITICAL batman-adv: reject oversized global TT response buffers
CVE-2026-31649 9.8 CRITICAL net: stmmac: fix integer underflow in chain mode
CVE-2026-31607 9.8 CRITICAL usbip: validate number_of_packets in usbip_pack_ret_submit()
CVE-2026-31637 9.8 CRITICAL rxrpc: reject undecryptable rxkad response tickets
CVE-2026-31589 9.8 CRITICAL mm: call ->free_folio() directly in folio_unmap_invalidate()
CVE-2026-31636 9.1 CRITICAL rxrpc: fix RESPONSE authenticator parser OOB read
CVE-2026-31570 8.8 HIGH can: gw: fix OOB heap access in cgw_csum_crc8_rel()
CVE-2026-31558 8.8 HIGH LoongArch: KVM: Make kvm_get_vcpu_by_cpuid() more robust
CVE-2026-31588 8.8 HIGH KVM: x86: Use scratch field in MMIO fragment to hold small write values
CVE-2026-31553 8.8 HIGH KVM: arm64: Fix the descriptor address in __kvm_at_swap_desc()
CVE-2026-31629 8.8 HIGH nfc: llcp: add missing return after LLCP_CLOSED checks
CVE-2026-31622 8.8 HIGH NFC: digital: Bounds check NFC-A cascade depth in SDD response handler
CVE-2026-31611 8.6 HIGH ksmbd: require 3 sub-authorities before reading sub_auth[2]

Showing top 20 of 138 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-31550

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