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CVE-2026-89964— parisc: eisa: Fix infinite loop when parsing invalid IRQ value

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： parisc: eisa: 修复解析无效 IRQ 值时的无限循环问题 当通过内核命令行参数 "eisa_irq_edge=" 传入无效值（例如 "eisa_irq_edge=16,5"）时，eisa_irq_setup() 函数在打印错误信息后继续执行，但未推进当前位置。因此，同一个无效值会被重复解析，导致内核启动期间出现无限循环。 修复方法是：在继续处理之前，先推进到下一个逗号分隔的条目；如果没有下一个条目，则停止解析，从而确保剩余条目能够被正常处理。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.22% · P11

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 68659b627770f3c8d8f578e8ddee78a07d5f1d0e affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 8640ade22369e248f77fbdd31a9d71b338499eef affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 21f063e3c2b11fb9078ccdfd3b23634313ce4f0c affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 62d88e93ef5e1e04041e347945f7d7510eba1797 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< bb10d54b74845eb4547baa1b9e908ecd32aa64e1 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 3e2691eeee83a819125dba3f42c74e1b6730d5cd affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 16a62a3f2128b3d86fefc082d8f631becd02bff5 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 8b585431a16cfb9d8f2955a9fa0787ce3dceb3c2 affected
… +10 more rows
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I. Basic Information for CVE-2026-89964

Vulnerability Information
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Vulnerability Title
parisc: eisa: Fix infinite loop when parsing invalid IRQ value
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: parisc: eisa: Fix infinite loop when parsing invalid IRQ value When an invalid value is passed via the "eisa_irq_edge=" kernel command line parameter (e.g. "eisa_irq_edge=16,5"), eisa_irq_setup() prints an error message and continues without advancing the current position. As a result the same invalid value is parsed again and again, causing an infinite loop while the kernel boots. Advance to the next comma-separated entry, or stop parsing when there is no next entry, before continuing so that the remaining entries are processed normally.
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ~ 68659b627770f3c8d8f578e8ddee78a07d5f1d0e -
Linux Linux 2.6.12 -

II. Public POCs for CVE-2026-89964

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III. Intelligence Information for CVE-2026-89964

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Other References for CVE-2026-89964 (8)

Same Patch Batch · Linux · 2026-09-16 · 276 CVEs total

CVE-2026-90048 9.8 CRITICAL fs/ntfs3: fix slab-out-of-bounds write in ni_create_attr_list()
CVE-2026-90012 9.8 CRITICAL spi: Fix DMA mapping ownership on partial map failure
CVE-2026-89970 9.8 CRITICAL nvmet-auth: Synchronize timeout work during SQ teardown
CVE-2026-89857 9.8 CRITICAL scsi: qla2xxx: Hold qpair lock when sending NVMe LS reject
CVE-2026-89969 9.8 CRITICAL nvmet-tcp: fix out-of-bounds write when receiving an over-long PDU
CVE-2026-89847 9.8 CRITICAL scsi: qla2xxx: Avoid double completion in async IOCB timeout
CVE-2026-89972 9.8 CRITICAL nvme: add missing SRCU grace period in error path
CVE-2026-89990 9.8 CRITICAL ceph: lock mutex in ceph_mds_check_access()
CVE-2026-90036 9.8 CRITICAL NFSD: Prevent client use-after-free during blocked-lock reaping
CVE-2026-90038 9.8 CRITICAL NFSD: Prevent client use-after-free during export state revocation
CVE-2026-90037 9.8 CRITICAL NFSD: Prevent client use-after-free during close_lru reaping
CVE-2026-89788 9.8 CRITICAL ksmbd: fix tree connection use-after-free in smb2_tree_connect()
CVE-2026-89783 9.8 CRITICAL xfrm6: fix out-of-bounds write in xfrm6_input_addr() when secpath is full
CVE-2026-90042 9.8 CRITICAL ceph: properly decrypt filenames in vmalloc() buffers
CVE-2026-89778 9.8 CRITICAL isofs: fix out-of-bounds page array access on empty zisofs block
CVE-2026-89915 9.3 CRITICAL KVM: arm64: Remove VM-wide VNCR mapping counter
CVE-2026-90049 9.3 CRITICAL net: skbuff: don't skb_tx_error() the source skb in skb_zerocopy()
CVE-2026-89775 9.3 CRITICAL KVM: arm64: Handle negative S1 walk levels in VNCR TLB size evaluation
CVE-2026-89916 9.3 CRITICAL KVM: arm64: Make VNCR invalidation participate in MMU invalidation retry
CVE-2026-89930 9.3 CRITICAL KVM: nVMX: Service local TLB flushes on failed nested VM-Enter

Showing top 20 of 276 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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