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CVE-2026-74622— net: atlantic: free RX pages of consumed but not refilled buffers

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，以下漏洞已被修复： 网络子系统：atlantic：释放已消耗但未重新填充的 RX 缓冲区页 仅遍历 区域，即已提交给硬件处理的区域。自从引入页面复用策略后，已清理的 RX 缓冲区会将其页面（及其 DMA 映射）保留在环中以便复用，并且重新填充操作是批量执行的：当 指定数量的槽位空闲之前， 会提前返回。因此，那些已被消耗但尚未重新发布的槽位会停留在互补的 间隙中，其中仍持有有效的页面。而 遍历过程从未访问这些槽位，导致每次接口关闭时，最多会有一个批次（replenish batch）的页面和

AI Predicted 5.5 Difficulty: Easy EPSS 0.22% · P13

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86< 1e58b0bab40dcbdfc04acaba6a221d40801c3770 affected
46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86< 30c473ea097ef0c93b064281b3e295c97d17e28b affected
46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86< 17c99dd86f169c7a3e73d6778e79ef5b1ed3ceac affected
46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86< ff451bc4290b79c04f1c5cfa928d448f9d47ecf5 affected
46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86< 64e1346bc66b947eb80b848e4c8d9828ba50e0fe affected
46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86< 782cc40b7ade4614a8aec0b948b8cf95c69f8d4b affected
46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86< 24d87dc28ddd3771dd0e88719209811809729439 affected
46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86< e8e7471ef686b6c002218fee9671cc61992ae01a affected
… +10 more rows
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I. Basic Information for CVE-2026-74622

Vulnerability Information
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Vulnerability Title
net: atlantic: free RX pages of consumed but not refilled buffers
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: atlantic: free RX pages of consumed but not refilled buffers aq_ring_rx_deinit() only walks [sw_head, sw_tail), the region posted to hardware. Since the page reuse strategy was added, a cleaned RX buffer keeps its page (and its DMA mapping) in the ring for reuse, and refill is batched: aq_ring_rx_fill() returns early until AQ_CFG_RX_REFILL_THRES slots are free. Slots that were consumed but not yet reposted therefore sit in the complementary [sw_tail, sw_head) gap with a live page, and the deinit walk never visits them: up to a refill batch worth of pages and DMA mappings leak on every interface down. Walk the whole ring instead and release whatever is still there. Also bail out if the buffer ring is already gone: a partial aq_ptp_ring_alloc() failure frees the ring but leaves aq_nic set, so aq_ptp_ring_deinit() still gets here on the unwind path.
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 46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86 ~ 1e58b0bab40dcbdfc04acaba6a221d40801c3770 -
Linux Linux 5.2 -

II. Public POCs for CVE-2026-74622

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III. Intelligence Information for CVE-2026-74622

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Patches & Fixes for CVE-2026-74622 (8)

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-2026-74623 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-2026-74626 NTB: ntb_netdev: Preserve RX queue depth on allocation failure
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

V. Comments for CVE-2026-74622

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