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CVE-2026-46244— netfilter: nft_inner: Fix IPv6 inner_thoff desync

CVSS 9.1 · Critical EPSS 0.32% · P25

Possible ATT&CK Techniques 1AI

T1564.008 · Email Hiding Rules

Affected Version Matrix 12

VendorProductVersion RangeStatus
LinuxLinux3a07327d10a09379315c844c63f27941f5081e0a< c161ad9157f5a0429b5ff94d9770faf3bf48d273affected
3a07327d10a09379315c844c63f27941f5081e0a< 870d59e2cf218e7418491e26bad768cb16654582affected
3a07327d10a09379315c844c63f27941f5081e0a< 689bbf48c1f45130086ae1c46ab83ea4c753c601affected
3a07327d10a09379315c844c63f27941f5081e0a< d0f98a3617f6ae5b1e95cde1e68e7ead4a1279ceaffected
3a07327d10a09379315c844c63f27941f5081e0a< b6a91f68ebfed9c38e0e9150f58a9b85da07181caffected
6.2affected
< 6.2unaffected
6.6.142≤ 6.6.*unaffected
… +4 more rows
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I. Basic Information for CVE-2026-46244

Vulnerability Information
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Vulnerability Title
netfilter: nft_inner: Fix IPv6 inner_thoff desync
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_inner: Fix IPv6 inner_thoff desync In nft_inner_parse_l2l3(), when processing inner IPv6 packets, ipv6_find_hdr() correctly computes the transport header offset traversing all extension headers, but the result is immediately overwritten with nhoff + sizeof(_ip6h) (40 bytes), which only accounts for the IPv6 base header. This creates a desync between inner_thoff (wrong — points to extension header start) and l4proto (correct — e.g., IPPROTO_TCP), enabling transport header forgery and potential firewall bypass. This issue affects stable versions from Linux 6.2. For comparison, the normal (non-inner) IPv6 path correctly preserves ipv6_find_hdr()'s result. Removing the incorrect overwrite ensures that ipv6_find_hdr()'s calculated transport header offset is preserved, thereby fixing the desynchronization.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于netfilter nft_inner模块在处理内部IPv6数据包时，ipv6_find_hdr正确计算传输头偏移但被错误覆盖，导致inner_thoff与l4proto不同步，可能造成传输头伪造和防火墙绕过。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux 3a07327d10a09379315c844c63f27941f5081e0a ~ c161ad9157f5a0429b5ff94d9770faf3bf48d273 -
LinuxLinux 6.2 -

II. Public POCs for CVE-2026-46244

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III. Intelligence Information for CVE-2026-46244

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Patches & Fixes for CVE-2026-46244 (5)

Same Patch Batch · Linux · 2026-06-03 · 32 CVEs total

CVE-2026-462669.1 CRITICALinet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP
CVE-2026-462648.8 HIGHdrm/xe/pf: Fix sysfs initialization
CVE-2026-462738.6 HIGHibmveth: Disable GSO for packets with small MSS
CVE-2026-462518.4 HIGHbtrfs: fix block_group_tree dirty_list corruption
CVE-2026-462708.4 HIGHpower: supply: rt9455: Fix use-after-free in power_supply_changed()
CVE-2026-462637.8 HIGHdrm/amd/display: Fix out-of-bounds stream encoder index v3
CVE-2026-462537.8 HIGHpstore/ram: fix buffer overflow in persistent_ram_save_old()
CVE-2026-462597.8 HIGHprocfs: fix missing RCU protection when reading real_parent in do_task_stat()
CVE-2026-462607.8 HIGHipv6: Fix out-of-bound access in fib6_add_rt2node().
CVE-2026-462717.8 HIGHwifi: ath12k: do WoW offloads only on primary link
CVE-2026-462657.5 HIGHRDMA/hns: Fix WQ_MEM_RECLAIM warning
CVE-2026-462507.3 HIGHMIPS: Work around LLVM bug when gp is used as global register variable
CVE-2026-46258gpio: cdev: Avoid NULL dereference in linehandle_create()
CVE-2026-46247clk: qcom: gfx3d: add parent to parent request map
CVE-2026-46248wifi: ath12k: clear stale link mapping of ahvif->links_map
CVE-2026-46246power: supply: pm8916_lbc: Fix use-after-free for extcon in IRQ handler
CVE-2026-46245drm/amd/display: Fix dc_link NULL handling in HPD init
CVE-2025-71314drm/panthor: Recover from panthor_gpu_flush_caches() failures
CVE-2026-46249octeontx2-af: Fix PF driver crash with kexec kernel booting
CVE-2026-46252regulator: core: fix locking in regulator_resolve_supply() error path

Showing top 20 of 32 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-46244

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