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CVE-2026-74718— devlink: fix net namespace reference leak in reload

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： devlink：修复 reload 操作中的网络命名空间引用泄漏 函数会调用 ，该函数返回一个持有引用计数的网络命名空间（net）。当请求的命名空间与当前命名空间不同，且重载（reload）操作不是 类型时，函数会返回错误码 ，但未释放之前获取的引用计数。为此，在该错误处理路径中补充了缺失的 调用，以正确释放引用计数，避免引用泄漏。

AI Predicted 3.3 Difficulty: Moderate EPSS 0.21% · P11

Possible ATT&CK Techniques 1 AI

T1135 · Network Share Discovery

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux 2edd92570441dd33246210042dc167319a5cf7e3< 7b6552e53426ea0539c667bbc5a524fdf7feae6f affected
2edd92570441dd33246210042dc167319a5cf7e3< bf0797b92be591ac71d7c0f610e695caca3c72c9 affected
2edd92570441dd33246210042dc167319a5cf7e3< 7b02c6d2a3cd2cd669f5c16685779f84328ae60c affected
2edd92570441dd33246210042dc167319a5cf7e3< eda60c85b4f4c7d66b7141a5fe020b1a7f395341 affected
2edd92570441dd33246210042dc167319a5cf7e3< 1c4dac9bf1d2ac31da63b794bdec697777cbd0fd affected
6.3 affected
< 6.3 unaffected
6.6.152≤ 6.6.* unaffected
… +4 more rows
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I. Basic Information for CVE-2026-74718

Vulnerability Information
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Vulnerability Title
devlink: fix net namespace reference leak in reload
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: devlink: fix net namespace reference leak in reload devlink_nl_reload_doit() calls devlink_netns_get(), which returns a net with a held reference. When the requested namespace differs from the current one and the reload action is not DRIVER_REINIT, the function returns -EOPNOTSUPP without releasing the reference. Add the missing put_net() on this error 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 2edd92570441dd33246210042dc167319a5cf7e3 ~ 7b6552e53426ea0539c667bbc5a524fdf7feae6f -
Linux Linux 6.3 -

II. Public POCs for CVE-2026-74718

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III. Intelligence Information for CVE-2026-74718

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Patches & Fixes for CVE-2026-74718 (5)

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

CVE-2026-74612 10.0 CRITICAL veth: fix skb length accounting after XDP frag adjustment
CVE-2026-74705 10.0 CRITICAL udp: fix potential use-after-free in tunnel segmentation
CVE-2026-74588 9.8 CRITICAL sctp: keep chunk->transport in step with the list it is queued on
CVE-2026-74662 9.8 CRITICAL inet: frags: publish queues before arming timer
CVE-2026-74611 9.8 CRITICAL tls: rx: restore msg_iter before TLS 1.3 optimistic retry
CVE-2026-74608 9.8 CRITICAL smb: client: Fix use-after-free in cifs_try_adding_channels()
CVE-2026-74669 9.8 CRITICAL ipvs: clear IPv4 options after rebasing tunnel ICMP errors
CVE-2026-74587 9.8 CRITICAL sctp: fix use-after-free of cached ASCONF chunk
CVE-2026-74597 9.8 CRITICAL ip6_tunnel: clear skb2->cb[] in ip6ip6_err()
CVE-2026-74723 9.8 CRITICAL btrfs: lzo: reject inline extents without valid headers
CVE-2026-74586 9.8 CRITICAL sctp: clear new_transport when removing a peer
CVE-2026-74688 9.8 CRITICAL sctp: clear control chunk transport if it is being removed
CVE-2026-74628 9.8 CRITICAL net/x25: fix use-after-free of the socket by its timers
CVE-2026-74730 9.8 CRITICAL NFS: Pin the 'struct nfs_server' during a FREE_STATEID call
CVE-2026-74617 9.8 CRITICAL dibs: initialise dibs->lock in dibs_dev_alloc()
CVE-2026-74727 9.8 CRITICAL ovpn: skip rehash for peers already removed from by_id
CVE-2026-74616 9.8 CRITICAL xdp: reject clones that overrun skb_shared_info tailroom
CVE-2026-74591 9.8 CRITICAL mm/filemap: __filemap_add_folio() restore index before retrying
CVE-2026-74712 9.3 CRITICAL vdpa/mlx5: Fix buffer length in create_direct_keys()
CVE-2026-74665 9.1 CRITICAL net: fix skb length accounting after generic XDP frag adjustment

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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