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CVE-2026-89845— scsi: qla2xxx: Avoid req_q_map double-read in qla2x00_error_entry()

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，以下漏洞已得到修复： scsi: qla2xxx：避免在 qla2x00_error_entry() 中对 req_q_map 进行双重读取 函数两次读取 ：一次用于 NULL 检查，另一次用于将其赋值给 。该映射槽位（map slot）会在队列拆卸（queue teardown）过程中由 函数清除（即在 互斥锁保护下执行 ），而驱动 的响应队列中断此时仍然处于注册状态（该 IRQ 直到后续在 中才被释放）。如果两次读取之间该槽位被设置为 NULL，则 将成为 NULL，并在后续被解引用，从

AI Predicted 7.1 Difficulty: Moderate EPSS 0.21% · P11

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux a6fe35c052c4fdd1e8e21251f14eea0bd4bbd25b< c845f2597787ef70159a32566669e308b2807a56 affected
a6fe35c052c4fdd1e8e21251f14eea0bd4bbd25b< fe04b31e386aee4cc3a18f07462af146037dc389 affected
a6fe35c052c4fdd1e8e21251f14eea0bd4bbd25b< 1b995cf4157465357d66ba096e7cdaafab9972e7 affected
a6fe35c052c4fdd1e8e21251f14eea0bd4bbd25b< d79376fbd2a076de82c1cd8aa0b600b300c75a44 affected
a6fe35c052c4fdd1e8e21251f14eea0bd4bbd25b< 1c90b74e484ba48f31944fe04963d99e01ac3767 affected
a6fe35c052c4fdd1e8e21251f14eea0bd4bbd25b< 5dd9bec8004ba93cee8b689bf54ce294f59e5e3c affected
a6fe35c052c4fdd1e8e21251f14eea0bd4bbd25b< 35124cfa9898b2088ee72859e573e0876aff66fc affected
a6fe35c052c4fdd1e8e21251f14eea0bd4bbd25b< deb8abde83a799d2501f3977f6d6051000253f5e affected
… +10 more rows
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I. Basic Information for CVE-2026-89845

Vulnerability Information
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Vulnerability Title
scsi: qla2xxx: Avoid req_q_map double-read in qla2x00_error_entry()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Avoid req_q_map double-read in qla2x00_error_entry() qla2x00_error_entry() reads ha->req_q_map[que] twice: once for the NULL check and again when assigning it to req. The map slot is cleared by qla25xx_free_req_que() (ha->req_q_map[que_id] = NULL under mq_lock) during queue teardown, while the response-queue interrupt that drives qla2x00_error_entry() is still registered (the IRQ is released later in qla25xx_free_rsp_que()). If the slot is set to NULL between the two reads, req becomes NULL and is dereferenced. Read the slot once into req and NULL-check the local before use. mq_lock is a mutex and cannot be taken from interrupt context, so the single read plus local check is the appropriate fix for the reported NULL dereference.
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 a6fe35c052c4fdd1e8e21251f14eea0bd4bbd25b ~ c845f2597787ef70159a32566669e308b2807a56 -
Linux Linux 3.4 -

II. Public POCs for CVE-2026-89845

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III. Intelligence Information for CVE-2026-89845

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Other References for CVE-2026-89845 (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

V. Comments for CVE-2026-89845

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