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CVE-2026-97436— dpaa2-switch: rework FDB management on the bridge leave path

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： dpaa2-switch：重构桥接退出路径上的 FDB（转发数据库）管理逻辑 当端口离开桥接（bridge）时， 函数总是为该变为独立端口的端口分配一个新的 FDB。如果未找到可用的 FDB，则该离开桥接的端口将继续使用当前的 FDB。 上述逻辑未能涵盖一种情况：即存在多个桥接，且这些桥接共享来自同一 DPSW 实例的端口。在这种情况下，当最后一个端口离开桥接 #1 时，它会找到一个未使用的 FDB 并切换过去，但旧的 FDB 并未被标记为“未使用”。由于 FDB 的数

AI Predicted 5.3 Difficulty: Moderate EPSS 0.17% · P6

Possible ATT&CK Techniques 1 AI

T1610 · Deploy Container

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux 539dda3c5d190c5088b5e57944b1b482fcb464de< ec41bfd281a8bc8027a42d2674eac5b74947ff7a affected
539dda3c5d190c5088b5e57944b1b482fcb464de< e07ff2338f45adbf572850335d761c2f97545935 affected
539dda3c5d190c5088b5e57944b1b482fcb464de< dc626f2abb3052881911b6166a9425739ce80085 affected
539dda3c5d190c5088b5e57944b1b482fcb464de< abea361a11e4e48695ea149652ef5d3f308b6a49 affected
539dda3c5d190c5088b5e57944b1b482fcb464de< 5adbc4d02d7df8bd7aa02c21874f7a582a576b55 affected
539dda3c5d190c5088b5e57944b1b482fcb464de< efc1d92eacf03afa6f4d53bf7120e059b6f961f2 affected
5.13 affected
< 5.13 unaffected
… +6 more rows
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I. Basic Information for CVE-2026-97436

Vulnerability Information
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Vulnerability Title
dpaa2-switch: rework FDB management on the bridge leave path
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: dpaa2-switch: rework FDB management on the bridge leave path On bridge leave, the dpaa2_switch_port_set_fdb() function always allocates a new FDB for the port which is becoming standalone. In case no FDB is found, then the port leaving a bridge will continue to use the current one. The above logic does not cover the case in which there are multiple bridges which have ports from the same DPSW instance. In this case, when the last port leaves bridge #1, it finds an unused FDB to switch to, but the old FDB is not marked as unused. Since the number of FDBs is equal to the number of DPSW interfaces, this will eventually lead to multiple ports sharing the same FDB. Fix this by changing how we are managing the FDBs on the leave path. Instead of directly allocating a new FDB, first verify if the current port is the last one to leave a bridge. If this is the case, then continue to use the current FDB and only allocate another FDB if there are other ports remaining in the bridge.
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 539dda3c5d190c5088b5e57944b1b482fcb464de ~ ec41bfd281a8bc8027a42d2674eac5b74947ff7a -
Linux Linux 5.13 -

II. Public POCs for CVE-2026-97436

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III. Intelligence Information for CVE-2026-97436

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Patches & Fixes for CVE-2026-97436 (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-2026-97452 8.4 HIGH ACPICA: Prevent adding invalid references
CVE-2026-97451 8.4 HIGH ACPICA: Fix integer overflow in acpi_ex_opcode_3A_1T_1R() (mid_op)
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-2026-93787 8.1 HIGH smb: client: bound dirent name against end of SMB response in cifs_filldir
CVE-2026-93786 8.1 HIGH ksmbd: preserve VFS inherited POSIX ACL mask

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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