208 lines
11 KiB
JSON
208 lines
11 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-90083",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-09-11T19:38:34.785Z",
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"datePublished": "2026-09-17T16:06:00.185Z",
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"dateUpdated": "2026-10-30T12:34:02.434Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-10-30T12:34:02.434Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: act_ife: Only operate on Ethernet frames\n\nact_ife encapsulates/decapsulates the original Ethernet header and uses\nskb->dev->hard_header_len as the length of that header. That is only\ncorrect for Ethernet devices: on a device where hard_header_len does not\nmatch the L2 header that was actually pulled (PPP reports PPP_HDRLEN\nwhile nothing is stripped on ingress), the ingress skb_push()/skb_pull()\nuse the wrong length and can hit skb_under_panic when headroom is tight.\n\nIFE is Ethernet-only by design - it builds an outer ethhdr, rewrites\nh_source/h_dest/h_proto, and calls eth_type_trans() on decode - so\ninstead of trying to make the offsets work for arbitrary link types,\nsimply drop packets that do not carry an Ethernet header.\n\nChecking skb->dev->type alone is not enough. We have to cater for a\ncorner case where mirred can redirect an skb from a non-Ethernet device\nto an Ethernet one, and skb->dev then says nothing about the framing the\nskb actually has: an skb redirected from ppp0 reaches the target's ingress\nhook with mac_len 0 and no Ethernet header at all. So at ingress also\nrequire mac_len to be ETH_HLEN. On egress mac_len is not maintained, so\nthe device type is all we have; a bogus redirect there yields a malformed\nframe rather than an out-of-bounds push, and it would be malformed with or\nwithout IFE.\n\nThat corner case is not theoretical - redirecting from ppp0 into a veth\nthat has an ife encode action on its ingress hook panics without this\npatch:\n\n skbuff: skb_under_panic: len:98 put:14 head:ffff88800e410000\n data:ffff88800e40fff5 tail:0x57 end:0x640 dev:veth3\n kernel BUG at net/core/skbuff.c:214!\n Call Trace:\n skb_push (net/core/skbuff.c:224 net/core/skbuff.c:2657)\n tcf_ife_act (net/sched/act_ife.c:829 net/sched/act_ife.c:874)\n tc_run (net/core/dev.c:4463)\n netif_receive_skb (net/core/dev.c:6463 net/core/dev.c:6522)\n tcf_mirred_to_dev (net/sched/act_mirred.c:248 net/sched/act_mirred.c:328)\n tcf_mirred_act (net/sched/act_mirred.c:489)\n tc_run (net/core/dev.c:4463)\n process_backlog (net/core/dev.c:6728)\n\nWith Ethernet framing guaranteed, use ETH_HLEN instead of\nhard_header_len."
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/ife/ife.c",
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"net/sched/act_ife.c"
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],
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"versions": [
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{
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"version": "295a6e06d21e1f469c9f38b00125a13b60ad4e7c",
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"lessThan": "3c07621770b04f19b67e3af4a24b4d447826fbdd",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "295a6e06d21e1f469c9f38b00125a13b60ad4e7c",
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"lessThan": "b951dd2fd5ede007474fc134ecb5639e1f86f5de",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "295a6e06d21e1f469c9f38b00125a13b60ad4e7c",
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"lessThan": "13dddf87a1f89557920f9b437a21ea0b7225f828",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "295a6e06d21e1f469c9f38b00125a13b60ad4e7c",
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"lessThan": "d218ea7df6eba076171f2d4897a429a31f2139f0",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "295a6e06d21e1f469c9f38b00125a13b60ad4e7c",
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"lessThan": "138b0054021fd7d57bc3eb68b3f4e2bcec037849",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "295a6e06d21e1f469c9f38b00125a13b60ad4e7c",
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"lessThan": "5b483f7791b079bb97d411f1066652ff659207ff",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/ife/ife.c",
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"net/sched/act_ife.c"
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],
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"versions": [
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{
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"version": "4.11",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "4.11",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.191",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.160",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.114",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.52",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2.6",
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"lessThanOrEqual": "7.2.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.3",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.11",
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"versionEndExcluding": "6.1.191"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.11",
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"versionEndExcluding": "6.6.160"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.11",
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"versionEndExcluding": "6.12.114"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.11",
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"versionEndExcluding": "6.18.52"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.11",
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"versionEndExcluding": "7.2.6"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.11",
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"versionEndExcluding": "7.3"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/3c07621770b04f19b67e3af4a24b4d447826fbdd"
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},
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{
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"url": "https://git.kernel.org/stable/c/b951dd2fd5ede007474fc134ecb5639e1f86f5de"
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},
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{
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"url": "https://git.kernel.org/stable/c/13dddf87a1f89557920f9b437a21ea0b7225f828"
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},
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{
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"url": "https://git.kernel.org/stable/c/d218ea7df6eba076171f2d4897a429a31f2139f0"
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},
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{
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"url": "https://git.kernel.org/stable/c/138b0054021fd7d57bc3eb68b3f4e2bcec037849"
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},
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{
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"url": "https://git.kernel.org/stable/c/5b483f7791b079bb97d411f1066652ff659207ff"
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}
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],
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"title": "net/sched: act_ife: Only operate on Ethernet frames",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |