143 lines
8.0 KiB
JSON
143 lines
8.0 KiB
JSON
{
|
|
"dataType": "CVE_RECORD",
|
|
"dataVersion": "5.2",
|
|
"cveMetadata": {
|
|
"cveId": "CVE-2026-98372",
|
|
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"state": "PUBLISHED",
|
|
"assignerShortName": "Linux",
|
|
"dateReserved": "2026-09-25T10:25:14.345Z",
|
|
"datePublished": "2026-10-06T08:46:56.529Z",
|
|
"dateUpdated": "2026-10-19T09:18:24.195Z"
|
|
},
|
|
"containers": {
|
|
"cna": {
|
|
"providerMetadata": {
|
|
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"shortName": "Linux",
|
|
"dateUpdated": "2026-10-19T09:18:24.195Z"
|
|
},
|
|
"descriptions": [
|
|
{
|
|
"lang": "en",
|
|
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: iptfs: fix stack OOB read in iptfs_skb_reset_frag_walk()\n\niptfs_skb_reset_frag_walk() advances to the fragment containing @offset\nwith an unbounded loop:\n\n\twhile (offset >= walk->past + walk->frags[walk->fragi].len)\n\t\twalk->past += walk->frags[walk->fragi++].len;\n\nwalk->fragi is advanced and walk->frags[walk->fragi] is dereferenced\nwithout ever checking fragi against walk->nr_frags. When the requested\noffset is at or beyond the total length spanned by the walk's fragments,\nfragi runs past nr_frags and off the end of the fixed-size on-stack\nfrags[MAX_SKB_FRAGS + 1] array, reading out-of-bounds stack memory.\n\nThe two callers behave differently: iptfs_skb_add_frags() already guards\nagainst this with\n\n\tif (!walk->nr_frags ||\n\t offset >= walk->total + walk->initial_offset)\n\t\treturn len;\n\nbut iptfs_skb_can_add_frags() has no such guard and calls\niptfs_skb_reset_frag_walk() unconditionally, so it performs the\nout-of-range walk. Its own \"fragi < walk->nr_frags\" bound check runs only\nafterwards, too late to prevent the read.\n\nThis is reachable from the receive path: a crafted IP-TFS (AGGFRAG)\npayload delivered to an IPTFS SA drives iptfs_reassem_cont() ->\niptfs_skb_can_add_frags() with an offset past the fragment total, e.g.:\n\n BUG: KASAN: stack-out-of-bounds in iptfs_skb_reset_frag_walk+0x235/0x250\n Read of size 4 at addr ffff888008ad7210 by task repro/345\n iptfs_skb_reset_frag_walk+0x235/0x250 net/xfrm/xfrm_iptfs.c:392\n iptfs_skb_can_add_frags+0x155/0x310 net/xfrm/xfrm_iptfs.c:420\n iptfs_reassem_cont+0xcf8/0x1140 net/xfrm/xfrm_iptfs.c:902\n iptfs_input_ordered+0x552/0x670 net/xfrm/xfrm_iptfs.c:1280\n iptfs_input+0x3d6/0xde0 net/xfrm/xfrm_iptfs.c:1741\n xfrm_input+0x282f/0x6140 net/xfrm/xfrm_input.c:700\n xfrm4_esp_rcv+0x93/0x120 net/ipv4/xfrm4_protocol.c:104\n ip_rcv+0x278/0x2d0 net/ipv4/ip_input.c:612\n\nGive iptfs_skb_can_add_frags() the same up-front guard that\niptfs_skb_add_frags() already has, so the walk is never entered with an\nout-of-range offset. When it triggers, the caller falls back to the\nexisting linearize-and-copy path, which is safe."
|
|
}
|
|
],
|
|
"affected": [
|
|
{
|
|
"product": "Linux",
|
|
"vendor": "Linux",
|
|
"defaultStatus": "unaffected",
|
|
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
|
|
"programFiles": [
|
|
"net/xfrm/xfrm_iptfs.c"
|
|
],
|
|
"versions": [
|
|
{
|
|
"version": "5f2b6a9095743a6bf1f34c43c4fe78fa8bdf5ad7",
|
|
"lessThan": "7e1c6884a0b494b7e3f204877f94c1e07a117bf7",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "5f2b6a9095743a6bf1f34c43c4fe78fa8bdf5ad7",
|
|
"lessThan": "da56d0ee93d1bad779b0486f2fab92d1bc1f0cf3",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "5f2b6a9095743a6bf1f34c43c4fe78fa8bdf5ad7",
|
|
"lessThan": "d042487dc118e494db2e2c1382310255c90ff544",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
}
|
|
]
|
|
},
|
|
{
|
|
"product": "Linux",
|
|
"vendor": "Linux",
|
|
"defaultStatus": "affected",
|
|
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
|
|
"programFiles": [
|
|
"net/xfrm/xfrm_iptfs.c"
|
|
],
|
|
"versions": [
|
|
{
|
|
"version": "6.14",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "0",
|
|
"lessThan": "6.14",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.18.54",
|
|
"lessThanOrEqual": "6.18.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "7.2.8",
|
|
"lessThanOrEqual": "7.2.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "7.3",
|
|
"lessThanOrEqual": "*",
|
|
"status": "unaffected",
|
|
"versionType": "original_commit_for_fix"
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"cpeApplicability": [
|
|
{
|
|
"nodes": [
|
|
{
|
|
"operator": "OR",
|
|
"negate": false,
|
|
"cpeMatch": [
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "6.14",
|
|
"versionEndExcluding": "6.18.54"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "6.14",
|
|
"versionEndExcluding": "7.2.8"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "6.14",
|
|
"versionEndExcluding": "7.3"
|
|
}
|
|
]
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"references": [
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/7e1c6884a0b494b7e3f204877f94c1e07a117bf7"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/da56d0ee93d1bad779b0486f2fab92d1bc1f0cf3"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/d042487dc118e494db2e2c1382310255c90ff544"
|
|
}
|
|
],
|
|
"title": "xfrm: iptfs: fix stack OOB read in iptfs_skb_reset_frag_walk()",
|
|
"x_generator": {
|
|
"engine": "bippy-1.2.0"
|
|
}
|
|
}
|
|
}
|
|
} |