CVE-2026-90293— IB/isert: post the full-feature receive buffers after session registration
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： IB/isert：在会话注册后投递全特性接收缓冲区 会在 执行之前投递全特性接收缓冲区。因此，如果发起端（initiator）不等待最终的 Login Response 就发送命令，仍可能在一个 为 NULL 的 上执行 SCSI 命令——这与前一个补丁所修复的问题相同，触发点在 处发生内核崩溃（oops）。 修复方法： 改为从 中投递这些接收缓冲区。该函数已被前一个补丁用于发送最终 Login Response，应在发送之前投递缓冲区：接收队列在通知发起端可以使用它的
Possible ATT&CK Techniques 2 AI
T1059 · Command and Scripting Interpreter T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 18
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | b8d26b3be8b33682cf163274ed07479a70554633< 962edb9a6b0dae09d33a677485a398fc7d55968c |
affected |
b8d26b3be8b33682cf163274ed07479a70554633< 068fe9841d2585b79d479fc7b58251d02d0b066f |
affected | ||
b8d26b3be8b33682cf163274ed07479a70554633< d4f8257c3283919ca7e149381d062b9af5f7df7d |
affected | ||
b8d26b3be8b33682cf163274ed07479a70554633< 9c21a433022219ca899d1b3cd9049991f51a6a2c |
affected | ||
b8d26b3be8b33682cf163274ed07479a70554633< 9b2c61344992c8c2b883e1eebe416cc488a19390 |
affected | ||
b8d26b3be8b33682cf163274ed07479a70554633< 6c506fee5a5f2c8719c65bcfc5e5d0862b0a1946 |
affected | ||
b8d26b3be8b33682cf163274ed07479a70554633< ad4492dcaf90a1d1a728ec5eef1a68ce5355027a |
affected | ||
b8d26b3be8b33682cf163274ed07479a70554633< 5247dde9daac7e107853b6fea043f7f47be033f7 |
affected | ||
| … +10 more rows | |||
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I. Basic Information for CVE-2026-90293
Vulnerability Information
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Vulnerability Title
IB/isert: post the full-feature receive buffers after session registration
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
IB/isert: post the full-feature receive buffers after session registration
isert_put_login_tx() posts the full-feature receive buffers before
__transport_register_session() runs, so an initiator that does not wait
for the final Login Response can still have a SCSI command executed
against an se_session whose se_tpg is NULL - the same oops as the
previous patch, at target_submit+0xbe.
Post them from isert_get_rx_pdu(), which the previous patch already uses
to send that response, and post them before that send: the receive queue
is filled at the moment the initiator is told it may use it. Allocating
there keeps the existing property that a memory allocation failure cannot
happen once the final Login Response is on the wire.
The receive queue is already empty between the final Login Request and
isert_post_recvm(); this moves the second point later, from a median of
92 us to 172 us over 1200 logins. Only an initiator that sends before it
has been told to can reach that window, and on IB and RoCE its send is
retried there until the buffers appear - isert_rdma_accept() asks for
rnr_retry_count = 7. iWARP has no RNR flow control, so there the same
send terminates the connection instead.
Measured over rxe, 400 login cycles per run, with an initiator that does
not wait: an instrumented build counted no entries to isert_recv_done()
before the buffers are posted in 10 runs, where that initiator oopsed
8 of 10 unpatched runs and 5 of 10 with only the previous patch.
Not tested: iWARP, discovery sessions over iSER, and real HCAs.
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
Affected Products
II. Public POCs for CVE-2026-90293
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-90293 (7)
Same Patch Batch · Linux · 2026-09-17 · 600 CVEs total
| CVE-2026-92489 | 9.8 CRITICAL | xfrm: Fix skb double-free in xfrm_dev_direct_output() |
| CVE-2026-90104 | 9.8 CRITICAL | NFSv4.1: zero referring call lists before decoding |
| CVE-2026-90173 | 9.8 CRITICAL | smb: smbdirect: free completion queues with ib_free_cq() |
| CVE-2026-90151 | 9.8 CRITICAL | NFSv4: remove callback IDR entry on client allocation failure |
| CVE-2026-90235 | 9.8 CRITICAL | sunrpc: xprtsock: annotate shared socket callbacks with READ_ONCE/WRITE_ONCE |
| CVE-2026-90110 | 9.4 CRITICAL | inetpeer: randomize RB-tree node comparison using SipHash |
| CVE-2026-90413 | 9.1 CRITICAL | IB/isert: reject login PDUs declaring more data than was received |
| CVE-2026-90414 | 9.1 CRITICAL | IB/isert: reject PDUs declaring more data than was received |
| CVE-2026-90230 | 9.1 CRITICAL | nvmet: fix heap out-of-bounds read in nvmet_auth_negotiate() |
| CVE-2026-90256 | 8.8 HIGH | Bluetooth: L2CAP: use proto_lock for l2cap_data to fix l2cap_disconn_ind |
| CVE-2026-90357 | 8.8 HIGH | wifi: mt76: mt7915: unlink TWT flow if the MCU rejects the agreement |
| CVE-2026-90286 | 8.8 HIGH | drm/amdgpu/gfx6: Use PFP on the compute queues too |
| CVE-2026-90381 | 8.8 HIGH | wifi: mt76: fix handling channel context with different bands in mt76_switch_vif_chanctx() |
| CVE-2026-90380 | 8.8 HIGH | wifi: mt76: mt792x: fix use-after-free in mt76_rx_poll_complete |
| CVE-2026-90329 | 8.8 HIGH | HID: synchronize input before cleaning up a failed probe |
| CVE-2026-93042 | 8.8 HIGH | dmaengine: dw-edma: Terminate all descriptors without callbacks |
| CVE-2026-90162 | 8.8 HIGH | ksmbd: defer publishing granted locks to prevent UAF/double-free race |
| CVE-2026-90379 | 8.8 HIGH | wifi: mt76: mt7921: Add PCIe AER handler support to prevent system crash |
| CVE-2026-90367 | 8.8 HIGH | wifi: mt76: mt7996: hold dev->mt76.mutex while disabling tx worker in SER |
| CVE-2026-90371 | 8.8 HIGH | wifi: mt76: fix RXDMAD_C buffer recycling race |
Showing top 20 of 600 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
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CVE-2026-98384
bpf: Fix out-of-bounds read of sk_protocol in bpf_sock_destr -
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bpf: Disallow bpf_skb_pull_data() for LWT_SEG6LOCAL -
CVE-2026-98382
bpf: Reject dev-bound-only programs on other devices -
CVE-2026-98381
veth: manage XDP program pointers during channel resize -
CVE-2026-98380
net/sched: reject IDR error pointers when deleting actions
Same vendor: Linux
-
CVE-2026-98384
bpf: Fix out-of-bounds read of sk_protocol in bpf_sock_destr -
CVE-2026-98383
bpf: Disallow bpf_skb_pull_data() for LWT_SEG6LOCAL -
CVE-2026-98382
bpf: Reject dev-bound-only programs on other devices -
CVE-2026-98381
veth: manage XDP program pointers during channel resize -
CVE-2026-98380
net/sched: reject IDR error pointers when deleting actions
V. Comments for CVE-2026-90293
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