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CVE-2026-43296— octeontx2-af: Workaround SQM/PSE stalls by disabling sticky

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.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于octeontx2-af驱动中NIX SQ管理器粘滞模式导致多个SQ共享SMQ并发传输时发生停滞，以及PSE在粘滞与非粘滞传输间转换时可能死锁，同时特定时钟门控条件下存在信用丢失问题。

CVSS 7.5 · High EPSS 0.55% · P45

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 5d9b976d4480dc0dcfa3719b645636d2f0f9f156< 9a3fd301329474f449e75f86d8a4f6b9c603fd6c affected
5d9b976d4480dc0dcfa3719b645636d2f0f9f156< d0b3c8a80336029d9356f429151eb27922d80a3c affected
5d9b976d4480dc0dcfa3719b645636d2f0f9f156< 36cc5a5e0178d5fb79e04173b8aa623b0108819a affected
5d9b976d4480dc0dcfa3719b645636d2f0f9f156< d9b549b6951ba178ec14339a031cae65f4e43fe1 affected
5d9b976d4480dc0dcfa3719b645636d2f0f9f156< cec2ceb35ce7bc874c43812bb39200d6cf691b87 affected
5d9b976d4480dc0dcfa3719b645636d2f0f9f156< 8052d0587fb14b85539c3a14a226586c0c3d6b4c affected
5d9b976d4480dc0dcfa3719b645636d2f0f9f156< b7eba260a34e854e2487b8363c11976f082df00d affected
5d9b976d4480dc0dcfa3719b645636d2f0f9f156< 70e9a5760abfb6338d63994d4de6b0778ec795d6 affected
… +10 more rows
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I. Basic Information for CVE-2026-43296

Vulnerability Information
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Vulnerability Title
octeontx2-af: Workaround SQM/PSE stalls by disabling sticky
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: octeontx2-af: Workaround SQM/PSE stalls by disabling sticky NIX SQ manager sticky mode is known to cause stalls when multiple SQs share an SMQ and transmit concurrently. Additionally, PSE may deadlock on transitions between sticky and non-sticky transmissions. There is also a credit drop issue observed when certain condition clocks are gated. work around these hardware errata by: - Disabling SQM sticky operation: - Clear TM6 (bit 15) - Clear TM11 (bit 14) - Disabling sticky → non-sticky transition path that can deadlock PSE: - Clear TM5 (bit 23) - Preventing credit drops by keeping the control-flow clock enabled: - Set TM9 (bit 21) These changes are applied via NIX_AF_SQM_DBG_CTL_STATUS. With this configuration the SQM/PSE maintain forward progress under load without credit loss, at the cost of disabling sticky optimizations.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于octeontx2-af驱动中NIX SQ管理器粘滞模式导致多个SQ共享SMQ并发传输时发生停滞，以及PSE在粘滞与非粘滞传输间转换时可能死锁，同时特定时钟门控条件下存在信用丢失问题。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 5d9b976d4480dc0dcfa3719b645636d2f0f9f156 ~ 9a3fd301329474f449e75f86d8a4f6b9c603fd6c -
Linux Linux 5.5 -

II. Public POCs for CVE-2026-43296

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III. Intelligence Information for CVE-2026-43296

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Patches & Fixes for CVE-2026-43296 (8)

Same Patch Batch · Linux · 2026-05-08 · 197 CVEs total

CVE-2026-43341 9.8 CRITICAL net/ipv6: ioam6: prevent schema length wraparound in trace fill
CVE-2026-43402 9.8 CRITICAL kthread: consolidate kthread exit paths to prevent use-after-free
CVE-2026-43414 9.8 CRITICAL scsi: qla2xxx: Completely fix fcport double free
CVE-2026-43384 9.8 CRITICAL net/tcp-ao: Fix MAC comparison to be constant-time
CVE-2026-43304 9.8 CRITICAL libceph: define and enforce CEPH_MAX_KEY_LEN
CVE-2026-43379 9.8 CRITICAL ksmbd: fix use-after-free in smb_lazy_parent_lease_break_close()
CVE-2026-43376 9.8 CRITICAL ksmbd: fix use-after-free by using call_rcu() for oplock_info
CVE-2026-43378 9.8 CRITICAL smb: server: fix use-after-free in smb2_open()
CVE-2026-43465 9.8 CRITICAL net/mlx5e: RX, Fix XDP multi-buf frag counting for striding RQ
CVE-2026-43383 9.4 CRITICAL net/tcp-md5: Fix MAC comparison to be constant-time
CVE-2026-43406 9.1 CRITICAL libceph: prevent potential out-of-bounds reads in process_message_header()
CVE-2026-43407 9.1 CRITICAL libceph: Fix potential out-of-bounds access in ceph_handle_auth_reply()
CVE-2026-43322 8.8 HIGH Bluetooth: hci_sync: Fix UAF in le_read_features_complete
CVE-2026-43334 8.8 HIGH Bluetooth: SMP: force responder MITM requirements before building the pairing response
CVE-2026-43391 8.8 HIGH nsfs: tighten permission checks for handle opening
CVE-2026-43284 8.8 HIGH xfrm: esp: avoid in-place decrypt on shared skb frags
CVE-2026-43403 8.8 HIGH nsfs: tighten permission checks for ns iteration ioctls
CVE-2026-43291 8.3 HIGH net: nfc: nci: Fix parameter validation for packet data
CVE-2026-43452 8.2 HIGH netfilter: x_tables: guard option walkers against 1-byte tail reads
CVE-2026-43365 8.2 HIGH xfs: fix undersized l_iclog_roundoff values

Showing top 20 of 197 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-43296

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