Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1000 CNY

100.0%
Buy Us a Coffee

CVE-2025-38192— net: clear the dst when changing skb protocol

EPSS 0.06% · P19
Get alerts for future matching vulnerabilitiesLog in to subscribe

I. Basic Information for CVE-2025-38192

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
net: clear the dst when changing skb protocol
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: clear the dst when changing skb protocol A not-so-careful NAT46 BPF program can crash the kernel if it indiscriminately flips ingress packets from v4 to v6: BUG: kernel NULL pointer dereference, address: 0000000000000000 ip6_rcv_core (net/ipv6/ip6_input.c:190:20) ipv6_rcv (net/ipv6/ip6_input.c:306:8) process_backlog (net/core/dev.c:6186:4) napi_poll (net/core/dev.c:6906:9) net_rx_action (net/core/dev.c:7028:13) do_softirq (kernel/softirq.c:462:3) netif_rx (net/core/dev.c:5326:3) dev_loopback_xmit (net/core/dev.c:4015:2) ip_mc_finish_output (net/ipv4/ip_output.c:363:8) NF_HOOK (./include/linux/netfilter.h:314:9) ip_mc_output (net/ipv4/ip_output.c:400:5) dst_output (./include/net/dst.h:459:9) ip_local_out (net/ipv4/ip_output.c:130:9) ip_send_skb (net/ipv4/ip_output.c:1496:8) udp_send_skb (net/ipv4/udp.c:1040:8) udp_sendmsg (net/ipv4/udp.c:1328:10) The output interface has a 4->6 program attached at ingress. We try to loop the multicast skb back to the sending socket. Ingress BPF runs as part of netif_rx(), pushes a valid v6 hdr and changes skb->protocol to v6. We enter ip6_rcv_core which tries to use skb_dst(). But the dst is still an IPv4 one left after IPv4 mcast output. Clear the dst in all BPF helpers which change the protocol. Try to preserve metadata dsts, those may carry non-routing metadata.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
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，该漏洞源于未清除目标地址导致空指针取消引用。
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 6578171a7ff0c31dc73258f93da7407510abf085 ~ 98b1d8dc9a3170b2614f1e8c93854e75cdd83980 -
LinuxLinux 4.8 -

II. Public POCs for CVE-2025-38192

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2025-38192

请登录查看更多情报信息。

Same Patch Batch · Linux · 2025-07-04 · 59 CVEs total

CVE-2025-38216iommu/vt-d: Restore context entry setup order for aliased devices
CVE-2025-38229media: cxusb: no longer judge rbuf when the write fails
CVE-2025-38231nfsd: Initialize ssc before laundromat_work to prevent NULL dereference
CVE-2025-38230jfs: validate AG parameters in dbMount() to prevent crashes
CVE-2025-38228media: imagination: fix a potential memory leak in e5010_probe()
CVE-2025-38233powerpc64/ftrace: fix clobbered r15 during livepatching
CVE-2025-38221ext4: fix out of bounds punch offset
CVE-2025-38219f2fs: prevent kernel warning due to negative i_nlink from corrupted image
CVE-2025-38218f2fs: fix to do sanity check on sit_bitmap_size
CVE-2025-38217hwmon: (ftsteutates) Fix TOCTOU race in fts_read()
CVE-2025-38220ext4: only dirty folios when data journaling regular files
CVE-2025-38215fbdev: Fix do_register_framebuffer to prevent null-ptr-deref in fb_videomode_to_var
CVE-2025-38214fbdev: Fix fb_set_var to prevent null-ptr-deref in fb_videomode_to_var
CVE-2025-38212ipc: fix to protect IPCS lookups using RCU
CVE-2025-38211RDMA/iwcm: Fix use-after-free of work objects after cm_id destruction
CVE-2025-38210configfs-tsm-report: Fix NULL dereference of tsm_ops
CVE-2025-38209nvme-tcp: remove tag set when second admin queue config fails
CVE-2025-38208smb: client: add NULL check in automount_fullpath
CVE-2025-38207mm: fix uprobe pte be overwritten when expanding vma
CVE-2025-38206exfat: fix double free in delayed_free

Showing top 20 of 59 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-38192

No comments yet

Leave a comment