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CVE-2026-97506— crypto: ixp4xx - fix buffer chain unwind on allocation failure

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： crypto: ixp4xx - 修复分配失败时的缓冲区链 unwind（清理）问题 函数用于为 scatterlist（分散/聚集列表）构建一个缓冲区描述符链表。如果在构建链表过程中 分配失败，当前代码会将 设置为 ，但在函数末尾却无条件地对该指针进行解引用： 这可能导致在分配失败时出现空指针解引用错误。 如果该失败发生在已经部分分配并建立 DMA 映射的描述符链之后，那么还需要释放这个部分构建的链。 修复方法是：在分配失败时终止部分构建的链，并让调用方通过其现有的清

AI Predicted 5.5 Difficulty: Hard EPSS 0.16% · P5

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 20

VendorProduct Version RangeStatus
Linux Linux 0d44dc59b2b434b29aafeae581d06f81efac7c83< d4007867be42d71795b78fa7f8ce7514dda9ca83 affected
0d44dc59b2b434b29aafeae581d06f81efac7c83< 4918b0bd7d2baafb45d87dca9e322137c96005c2 affected
0d44dc59b2b434b29aafeae581d06f81efac7c83< 8c37bc8d6a6f77bf9593fb1bcab6c14c7cf02991 affected
0d44dc59b2b434b29aafeae581d06f81efac7c83< 04cb00106ca4d0fa9eca24cadc4eda6036e855c8 affected
0d44dc59b2b434b29aafeae581d06f81efac7c83< 028a7f4f3d69e551f6bf9f728d547bbf4cfc707d affected
0d44dc59b2b434b29aafeae581d06f81efac7c83< 25056329384010a8672552b134f609601dc4f80e affected
5a80273150a8a1725fa70418d106eb1f2ee8fd2f affected
82a8becb9c2c52fc5e67057a43aeded1f0731e7b affected
… +12 more rows
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I. Basic Information for CVE-2026-97506

Vulnerability Information
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Vulnerability Title
crypto: ixp4xx - fix buffer chain unwind on allocation failure
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: crypto: ixp4xx - fix buffer chain unwind on allocation failure chainup_buffers() builds a linked list of buffer descriptors for a scatterlist. If dma_pool_alloc() fails while constructing the list, the current code sets buf to NULL and later dereferences it unconditionally at the end of the function: buf->next = NULL; buf->phys_next = 0; This can lead to a null-pointer dereference on allocation failure. If the failure happens after part of the descriptor chain has already been allocated and DMA-mapped, the partially constructed chain also needs to be released. Fix this by terminating the partially constructed chain on allocation failure and letting the callers unwind it via their existing cleanup paths. Also fix ablk_perform() to preserve the hook pointers before checking for failure, so partially built chains can be freed correctly.
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 0d44dc59b2b434b29aafeae581d06f81efac7c83 ~ d4007867be42d71795b78fa7f8ce7514dda9ca83 -
Linux Linux 2.6.30 -

II. Public POCs for CVE-2026-97506

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III. Intelligence Information for CVE-2026-97506

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Patches & Fixes for CVE-2026-97506 (6)

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-2026-93786 8.1 HIGH ksmbd: preserve VFS inherited POSIX ACL mask
CVE-2026-93221 8.1 HIGH nfsd: convert nfsd_net boolean flags to unsigned long flags word

Showing top 20 of 234 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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