CVE-2026-97481— serial: 8250: fix possible ISR soft lockup
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.
在 Linux 内核中，已修复以下漏洞： 串行：8250：修复可能的中断服务程序（ISR）软锁死 在极少数情况下，主机因在启动阶段收到大量消息而卡在中断服务程序（ISR）中。 导致 ISR 中发生软锁死的原因是缺少对 FIFO 错误中断（FIFOE）的处理。未处理该中断并报告 会导致中断被立即再次触发。 修复方法是添加对 FIFOE 状态的检查，并在没有数据准备就绪（DR）时清空 FIFO。 此问题在 AM62L 设备上被观察到，该设备使用 OMAP 8250 驱动。为所有 8250 驱动修复此问题，因为 OMAP
Possible ATT&CK Techniques 1 AI
T1499 · Endpoint Denial of ServiceAffected Version Matrix 16
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 4bce4a6f6318035d77d6b6199527b1950bb015f4 |
affected |
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 8b67af8cd90542b2607623e3282811849e191b79 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 95d0b40c0623fd2b58c753f8dd6adda7263e3cd1 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 03ed804a0ddc3d069faf94c47f9e702afe5ca084 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 2881b2e6da02daea1eb8254247ba8fd20c9d3348 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 4295c58990b7a84e8349a2226db692e252825b60 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 0c6bf45e5a345cc3b9ffbeaf9083ecac3c2293eb |
affected | ||
2.6.12 |
affected | ||
| … +8 more rows | |||
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I. Basic Information for CVE-2026-97481
Vulnerability Information
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Vulnerability Title
serial: 8250: fix possible ISR soft lockup
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
serial: 8250: fix possible ISR soft lockup
There are rare cases in which the host gets stuck in the ISR because it
is flooded with messages during the startup phase.
The reason for the soft lockup in the ISR is the missing FIFO error IRQ
(FIFOE) handling. Not handling it and reporting IRQ_HANDLED triggers
the IRQ immediately again.
Fix this by adding a check for the FIFOE status and clearing the FIFO
if no data is ready (DR).
This behavior was observed on an AM62L device which uses the OMAP 8250
driver. Fix it for all 8250 drivers, since the OMAP driver's special
IRQ setup handling may trigger this behavior more frequently, but it
is not ensured that other 8250 drivers aren't affected.
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
Affected Products
II. Public POCs for CVE-2026-97481
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-97481 (7)
Same Patch Batch · Linux · 2026-09-24 · 234 CVEs total
| CVE-2026-93207 | 9.8 CRITICAL | SUNRPC: Zero rpc_gss_wire_cred at svcauth_gss_decode_credbody() entry |
| CVE-2026-97413 | 9.8 CRITICAL | RDMA/rtrs-srv: Fix integer underflow in process_read and process_write |
| CVE-2026-93228 | 9.1 CRITICAL | svcrdma: Reject Write/Reply chunks with segcount 0 |
| CVE-2026-93799 | 8.8 HIGH | wifi: iwlwifi: mvm: validate sta_id in BA window status notif |
| CVE-2026-97442 | 8.8 HIGH | wifi: ath11k: fix invalid data access in ath11k_dp_rx_h_undecap_nwifi |
| CVE-2026-97409 | 8.8 HIGH | nvme-fc: Do not cancel requests in io target before it is initialized |
| CVE-2026-93806 | 8.8 HIGH | wifi: cfg80211: validate assoc response length before status and IE access |
| CVE-2026-93793 | 8.8 HIGH | wifi: iwlwifi: mvm: validate TX_CMD response layout |
| CVE-2026-93790 | 8.8 HIGH | wifi: iwlwifi: mvm: fix out-of-bounds tid_data access in BA notif |
| CVE-2026-93284 | 8.8 HIGH | drm/pagemap: dma-unmap pages before handling migration errors |
| CVE-2026-93280 | 8.8 HIGH | greybus: audio: bound the topology section sizes against the fetched size |
| CVE-2026-97509 | 8.8 HIGH | thunderbolt: Keep XDomain reference during the lifetime of a service |
| CVE-2026-93827 | 8.4 HIGH | virtio-fs: avoid double-free on failed queue setup |
| CVE-2026-97450 | 8.4 HIGH | ACPICA: validate handler object type in two places |
| CVE-2026-97451 | 8.4 HIGH | ACPICA: Fix integer overflow in acpi_ex_opcode_3A_1T_1R() (mid_op) |
| CVE-2026-97452 | 8.4 HIGH | ACPICA: Prevent adding invalid references |
| CVE-2026-97455 | 8.4 HIGH | ACPICA: Fix use-after-free in acpi_ds_terminate_control_method() |
| CVE-2026-97433 | 8.2 HIGH | nvme: validate FDP configuration descriptor sizes |
| CVE-2026-93221 | 8.1 HIGH | nfsd: convert nfsd_net boolean flags to unsigned long flags word |
| CVE-2026-93786 | 8.1 HIGH | ksmbd: preserve VFS inherited POSIX ACL mask |
Showing top 20 of 234 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
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Same vendor: Linux
-
CVE-2026-98384
bpf: Fix out-of-bounds read of sk_protocol in bpf_sock_destr -
CVE-2026-98383
bpf: Disallow bpf_skb_pull_data() for LWT_SEG6LOCAL -
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bpf: Reject dev-bound-only programs on other devices -
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CVE-2026-98380
net/sched: reject IDR error pointers when deleting actions
V. Comments for CVE-2026-97481
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