In the Linux kernel, the following vulnerability has been resolved:
netfilter: flowtable: account for Ethernet header in nfflowpppoe_proto()
syzbot found a potential access to uninit-value in nfflowpppoe_proto()
Blamed commit forgot the Ethernet header.
BUG: KMSAN: uninit-value in nfflowoffloadinethook+0x7e4/0x940 net/netfilter/nfflowtableinet.c:27 nfflowoffloadinethook+0x7e4/0x940 net/netfilter/nfflowtableinet.c:27 nfhookentryhookfn include/linux/netfilter.h:157 [inline] nfhookslow+0xe1/0x3d0 net/netfilter/core.c:623 nfhookingress include/linux/netfilternetdev.h:34 [inline] nf_ingress net/core/dev.c:5742 [inline] __netifreceiveskb_core+0x4aff/0x70c0 net/core/dev.c:5837 __netifreceiveskbonecore net/core/dev.c:5975 [inline] __netifreceiveskb+0xcc/0xac0 net/core/dev.c:6090 netif_receiveskbinternal net/core/dev.c:6176 [inline] netifreceiveskb+0x57/0x630 net/core/dev.c:6235 tunrxbatched+0x1df/0x980 drivers/net/tun.c:1485 tungetuser+0x4ee0/0x6b40 drivers/net/tun.c:1938 tunchrwriteiter+0x3e9/0x5c0 drivers/net/tun.c:1984 newsyncwrite fs/readwrite.c:593 [inline] vfswrite+0xb4b/0x1580 fs/readwrite.c:686 ksyswrite fs/readwrite.c:738 [inline] _dosyswrite fs/readwrite.c:749 [inline]
{
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38441.json",
"cna_assigner": "Linux"
}[
{
"target": {
"function": "nf_flow_pppoe_proto",
"file": "include/net/netfilter/nf_flow_table.h"
},
"id": "CVE-2025-38441-80fb0cb9",
"digest": {
"function_hash": "328215630746005765259524757518520894856",
"length": 171.0
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@18cdb3d982da8976b28d57691eb256ec5688fad2",
"signature_version": "v1",
"deprecated": false,
"signature_type": "Function"
},
{
"target": {
"file": "include/net/netfilter/nf_flow_table.h"
},
"id": "CVE-2025-38441-89343dd1",
"digest": {
"line_hashes": [
"47337715065676330044825099628781738846",
"210540963209817581631752203928855740661",
"54757703481627026555935427491649202216",
"175106729807013295156903967064789924179"
],
"threshold": 0.9
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@18cdb3d982da8976b28d57691eb256ec5688fad2",
"signature_version": "v1",
"deprecated": false,
"signature_type": "Line"
}
]
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-38441.json"