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CVE-2026-74626— NTB: ntb_netdev: Preserve RX queue depth 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，已修复以下漏洞： NTB：ntb_netdev：在分配失败时保留接收（RX）队列深度 函数在分配新的 skb（套接字缓冲区）以替换已接收的数据包之前，就已将接收到的 skb 交给网络协议栈处理。如果新 skb 的分配失败，则不会重新投放（repost）任何缓冲区。因此，每次失败都会从 RX 队列中永久移除一个缓冲区，而网络接口仍然保持启用状态，足够多的失败最终会导致接收过程停滞。 虽然理论上可以设计一个重试路径来稍后填充队列，但 并未实现此类机制。改进方案是：首先分配用于替换的新 skb。如

AI Predicted 5.3 Difficulty: Moderate EPSS 0.20% · P10

Affected Version Matrix 6

VendorProduct Version RangeStatus
Linux Linux 548c237c0a9972df5d1afaca38aa733ee577128d< 755fd7843f300d724caceabdf9bb13adc8701540 affected
548c237c0a9972df5d1afaca38aa733ee577128d< d2121faf133ac3bf9531b53a7e21273649a08517 affected
3.9 affected
< 3.9 unaffected
7.1.9≤ 7.1.* unaffected
7.2≤ * unaffected
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I. Basic Information for CVE-2026-74626

Vulnerability Information
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Vulnerability Title
NTB: ntb_netdev: Preserve RX queue depth on allocation failure
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: NTB: ntb_netdev: Preserve RX queue depth on allocation failure ntb_netdev_rx_handler() hands the received skb to the network stack before allocating its replacement. If the allocation fails, nothing is reposted. Every failure therefore takes one buffer out of the RX queue while the interface remains up, and enough failures eventually stall reception. A retry path could refill the queue later, but ntb_netdev has none. Allocate the replacement first instead. If that fails, drop the packet and repost the same skb. This keeps the queue full and lets packet delivery resume as soon as memory is available again.
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 548c237c0a9972df5d1afaca38aa733ee577128d ~ a4e340971fe8ccd245d206db4d43b2a0eec240bd -
Linux Linux 3.9 -

II. Public POCs for CVE-2026-74626

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III. Intelligence Information for CVE-2026-74626

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Patches & Fixes for CVE-2026-74626 (2)

Same Patch Batch · Linux · 2026-08-22 · 150 CVEs total

CVE-2026-74640 ALSA: FCP: fix OOB write in fcp_meter_ctl_get()
CVE-2026-74621 net/sched: act_ct: fix sk_buff leak when the header checks reject a packet
CVE-2026-74622 net: atlantic: free RX pages of consumed but not refilled buffers
CVE-2026-74623 net: atlantic: free stranded TX buffers on ring deinit
CVE-2026-74624 netfilter: nf_conntrack: defer invalid log until after unlock
CVE-2026-74625 netfilter: bridge: release template ct on non-IP path
CVE-2026-74627 net: devmem: prevent net-iov / page mixing
CVE-2026-74628 net/x25: fix use-after-free of the socket by its timers
CVE-2026-74629 net/dibs: Correct freeing of dmb_clientid_arr
CVE-2026-74631 net: smc: fix splice entry lifetime imbalance in smc_rx_splice
CVE-2026-74630 ipv6: prevent in6_dev_get() from resurrecting inet6_dev
CVE-2026-74632 mm/huge_memory: fix huge_zero_pfn race
CVE-2026-74633 tracing: Fix NULL pointer dereference in module event cache removal
CVE-2026-74634 ring-buffer: Prevent subbuf order change when resizing is disabled
CVE-2026-74635 fbdev: bitblit: bound-check glyph index in bit_cursor()
CVE-2026-74636 tracing: Fix race between update_event_fields and, event_define_fields
CVE-2026-74637 perf/core: Fix group leader use-after-free after sibling detach
CVE-2026-74639 ALSA: us144mkii: re-anchor capture URBs on resubmission
CVE-2026-74638 drm/v3d: Serialize the scheduler timeout handlers
CVE-2026-74651 staging: rtl8723bs: fix OOB read in rtw_get_wpa_ie()

Showing top 20 of 150 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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