CVE-2026-23459

In the Linux kernel, the following vulnerability has been resolved: ip_tunnel: adapt iptunnel_xmit_stats() to NETDEV_PCPU_STAT_DSTATS Blamed commits forgot that vxlan/geneve use udp_tunnel[6]_xmit_skb() which call iptunnel_xmit_stats(). iptunnel_xmit_stats() was assuming tunnels were only using NETDEV_PCPU_STAT_TSTATS. @syncp offset in pcpu_sw_netstats and pcpu_dstats is different. 32bit kernels would either have corruptions or freezes if the syncp sequence was overwritten. This patch also moves pcpu_stat_type closer to dev->{t,d}stats to avoid a potential cache line miss since iptunnel_xmit_stats() needs to read it.

CVSS v3 8.2 HIGH

8.2^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 4.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/0d087d00161f562d5047cc4009bb0c6a19daf9f1	Patch
https://git.kernel.org/stable/c/5d562153b4719234227f99c2fb529f98a6a44d15
https://git.kernel.org/stable/c/8431c602f551549f082bbfa67f3003f2d8e3e132	Patch
https://git.kernel.org/stable/c/e40e2d11ced8119d3e4469ebe91264bc1cf71530

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel:7.0:rc1::::::
	cpe:2.3:o:linux:linux_kernel:7.0:rc2::::::
	cpe:2.3:o:linux:linux_kernel:7.0:rc3::::::
	cpe:2.3:o:linux:linux_kernel:7.0:rc4::::::

History

No history.

Information

Published : 2026-04-03 16:16

Updated : 2026-09-07 16:17

NVD link : CVE-2026-23459

Mitre link : CVE-2026-23459

CVE.ORG link : CVE-2026-23459

JSON object : View

Products Affected

linux

linux_kernel

CWE

NVD-CWE-noinfo

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"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nip_tunnel: adapt iptunnel_xmit_stats() to NETDEV_PCPU_STAT_DSTATS\n\nBlamed commits forgot that vxlan/geneve use udp_tunnel[6]_xmit_skb() which\ncall iptunnel_xmit_stats().\n\niptunnel_xmit_stats() was assuming tunnels were only using\nNETDEV_PCPU_STAT_TSTATS.\n\n@syncp offset in pcpu_sw_netstats and pcpu_dstats is different.\n\n32bit kernels would either have corruptions or freezes if the syncp\nsequence was overwritten.\n\nThis patch also moves pcpu_stat_type closer to dev->{t,d}stats to avoid\na potential cache line miss since iptunnel_xmit_stats() needs to read it."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nip_tunnel: adaptar iptunnel_xmit_stats() a NETDEV_PCPU_STAT_DSTATS\n\nLos commits culpables olvidaron que vxlan/geneve usan udp_tunnel[6]_xmit_skb() que llama a iptunnel_xmit_stats().\n\niptunnel_xmit_stats() asum\u00eda que los t\u00faneles solo usaban NETDEV_PCPU_STAT_TSTATS.\n\nEl desplazamiento @syncp en pcpu_sw_netstats y pcpu_dstats es diferente.\n\nLos kernels de 32 bits tendr\u00edan o bien corrupciones o congelamientos si la secuencia syncp era sobrescrita.\n\nEste parche tambi\u00e9n mueve pcpu_stat_type m\u00e1s cerca de dev -> {t,d}stats para evitar una posible p\u00e9rdida de l\u00ednea de cach\u00e9 ya que iptunnel_xmit_stats() necesita leerlo."}], "lastModified": "2026-09-07T16:17:27.923", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2B2C5324-E9BD-43C2-AA70-44A311B13130", "versionEndExcluding": "6.19.10", "versionStartIncluding": "6.14"}, {"criteria": 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