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CVE-2026-98322— netfilter: nft_nat: fully initialise new_addr in netmap setup

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： netfilter: nft_nat：在 netmap 设置中完全初始化 new_addr 在栈上的联合体 中构建映射地址。对于 IPv4 映射，它仅写入 4 字节的 成员，且循环仅执行一次 32 位迭代，但随后会将整个 16 字节的联合体复制到 和 中，导致高 12 字节以未初始化状态传递至 。 KMSAN 在 中报告了未初始化值，该值源自 。IPv6 路径会填充全部 16 个字节，因此不受影响。 将 零初始化。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 3ff7ddb1353da9b535e65702704cbadea1da9a00< 29365695842db0a97b701a43a09fad1b4f7ecf3e affected
3ff7ddb1353da9b535e65702704cbadea1da9a00< 7b9380c38c2fd2189416fa602bdbc5c8523b84b2 affected
3ff7ddb1353da9b535e65702704cbadea1da9a00< eb2030137dba3b59cbb5057a33af70488d6bc231 affected
3ff7ddb1353da9b535e65702704cbadea1da9a00< e4982c489ee359162eee3ece1fb36082648464a5 affected
3ff7ddb1353da9b535e65702704cbadea1da9a00< 161f5860c92a8ec80b6bdff16e79d70dcd8afc5a affected
3ff7ddb1353da9b535e65702704cbadea1da9a00< 0ce42c7b84032335abff9eac43762e4ca8224451 affected
3ff7ddb1353da9b535e65702704cbadea1da9a00< 1c43f5db482f74b41987c39c9c375a5e767556eb affected
3ff7ddb1353da9b535e65702704cbadea1da9a00< d313499df66159b4b7971d760d16729598ab7e5a affected
… +10 more rows
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I. Basic Information for CVE-2026-98322

Vulnerability Information
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Vulnerability Title
netfilter: nft_nat: fully initialise new_addr in netmap setup
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_nat: fully initialise new_addr in netmap setup nft_nat_setup_netmap() builds the mapped address in an on-stack union nf_inet_addr. For an IPv4 mapping it writes only the 4-byte .ip member and the loop runs a single 32-bit iteration, but it then copies the whole 16-byte union into range->min_addr and range->max_addr, so the upper 12 bytes reach nf_nat_setup_info() uninitialised. KMSAN reports an uninit-value in nf_nat_setup_info() reached from nft_nat_eval(). The IPv6 path fills all 16 bytes and is not affected. Zero-initialise new_addr.
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 3ff7ddb1353da9b535e65702704cbadea1da9a00 ~ 29365695842db0a97b701a43a09fad1b4f7ecf3e -
Linux Linux 5.8 -

II. Public POCs for CVE-2026-98322

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III. Intelligence Information for CVE-2026-98322

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Patches & Fixes for CVE-2026-98322 (8)

Same Patch Batch · Linux · 2026-10-06 · 208 CVEs total

CVE-2026-98323 9.8 CRITICAL RDMA/siw: Bound fragmented header copies by the remaining length
CVE-2026-98365 9.8 CRITICAL RDMA/rxe: Fix integer overflow in mr_check_range() leading to OOB access
CVE-2026-98282 8.8 HIGH powerpc/iommu: Fix the overflow validation in iommu_tce_check_ioba
CVE-2026-98283 8.8 HIGH KVM: PPC: Book3S HV: fix use-after-free in kvmhv_emulate_tlbie_all_lpid()
CVE-2026-98339 8.8 HIGH wifi: cfg80211: don't filter by BSS type when removing stale entries
CVE-2026-98171 8.8 HIGH smb: client: fix next_buffer UAF and NextCommand bounds in compound PDUs
CVE-2026-98261 8.1 HIGH cifs: Fix server use-after-free in cifs_chan_skip_or_disable()
CVE-2026-98357 8.1 HIGH IB/isert: wait for deferred control PDU completions before releasing the connection
CVE-2026-98239 8.1 HIGH net: lan743x: fix RX checksum use-after-free
CVE-2026-98305 7.8 HIGH net: dsa: mxl862xx: disable the stats poll on teardown
CVE-2026-98341 7.8 HIGH wifi: cfg80211: don't free driver-owned scan requests
CVE-2026-98320 7.8 HIGH netfilter: flowtable: hold reference on ct until flow is released
CVE-2026-98228 7.8 HIGH mips: select CONFIG_WEAK_REORDERING_BEYOND_LLSC from CONFIG_EYEQ
CVE-2026-98229 7.8 HIGH xfrm: save input state data before secpath resets
CVE-2026-98318 7.8 HIGH smb: client: validate absolute native symlink targets before NT fixups
CVE-2026-98315 7.8 HIGH ntfs: protect runlist updates with the runlist lock
CVE-2026-98311 7.8 HIGH wifi: virt_wifi: don't transfer operstate before register
CVE-2026-98276 7.8 HIGH net: lock the socket in sock_gettstamp()
CVE-2026-98258 7.8 HIGH posix-cpu-timers: Prevent freeing a timer which is queued on the expiry list
CVE-2026-98260 7.8 HIGH exec: Cleanup POSIX timers right after de_thread()

Showing top 20 of 208 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-98322

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