227 lines
12 KiB
JSON
227 lines
12 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-2026-90078",
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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": "2026-09-17T16:05:56.878Z",
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"dateUpdated": "2026-10-19T08:57:34.924Z"
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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": "2026-10-19T08:57:34.924Z"
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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_skbmod: fix length calculations and avoid invalid header warnings\n\nsyzbot reported a warning in skb_network_header_len() triggered\nby tcf_skbmod_act():\n\n !skb_transport_header_was_set(skb)\n WARNING: CPU: 0 PID: 14949 at include/linux/skbuff.h:3243 skb_network_header_len include/linux/skbuff.h:3243 [inline]\n WARNING: CPU: 0 PID: 14949 at net/sched/act_skbmod.c:55 tcf_skbmod_act+0xfe8/0x1810 net/sched/act_skbmod.c:55\n\nThere are a few issues in tcf_skbmod_act():\n\n1. Calling skb_network_header_len() assumes skb->transport_header is set,\n which is not guaranteed when tcf_skbmod_act() runs at TC ingress.\n2. Unconditionally calling skb_mac_header_len() at the beginning of\n tcf_skbmod_act() triggers a warning on L3 devices (e.g. TUN) where the\n MAC header is unset, evaluating to an underflowed garbage length.\n3. On TC ingress, skb->data points to the network header. Adding the MAC\n header length to the IP header length causes skb_ensure_writable() to\n request more bytes than the actual IP packet length, dropping valid\n short packets (e.g. 28-byte UDP/IPv4 packets).\n\nFix these by:\n- Using skb_network_offset(skb) + sizeof(struct iphdr/ipv6hdr) for\n SKBMOD_F_ECN so that the required length is correctly calculated on\n both ingress (offset == 0) and egress (offset == mac_len).\n- Setting max_edit_len to ETH_HLEN for Ethernet header modifications\n after validating ARPHRD_ETHER."
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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/sched/act_skbmod.c"
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],
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"versions": [
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{
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"version": "56af5e749f20c3a540310c207dcc373f4f09156e",
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"lessThan": "985a37781ade19061400100c2ba0f43979dd4d63",
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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": "56af5e749f20c3a540310c207dcc373f4f09156e",
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"lessThan": "d896843d8d925f0adbba319020595cfb1a7bcd57",
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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": "56af5e749f20c3a540310c207dcc373f4f09156e",
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"lessThan": "0675cff3c2924eb9b80d9dd250cf56a1140af157",
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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": "56af5e749f20c3a540310c207dcc373f4f09156e",
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"lessThan": "e8a2027b7e686784a69b2dfcee841d779919f313",
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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": "56af5e749f20c3a540310c207dcc373f4f09156e",
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"lessThan": "1719865b20b22c88d2a55e922eff5ca31b0841f6",
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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": "56af5e749f20c3a540310c207dcc373f4f09156e",
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"lessThan": "62126464f3a6159c0a3dd89e196ba65bfeb0afc6",
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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": "56af5e749f20c3a540310c207dcc373f4f09156e",
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"lessThan": "81d0d1e64f30d9989c829c0953cd6e6c68d9c5fb",
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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/sched/act_skbmod.c"
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],
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"versions": [
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{
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"version": "5.15",
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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": "5.15",
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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": "5.15.221",
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"lessThanOrEqual": "5.15.*",
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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": "6.1.188",
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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": "6.6.157",
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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": "6.12.110",
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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": "5.15",
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"versionEndExcluding": "5.15.221"
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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": "5.15",
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"versionEndExcluding": "6.1.188"
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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": "5.15",
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"versionEndExcluding": "6.6.157"
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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": "5.15",
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"versionEndExcluding": "6.12.110"
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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": "5.15",
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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": "5.15",
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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": "5.15",
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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/985a37781ade19061400100c2ba0f43979dd4d63"
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},
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{
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"url": "https://git.kernel.org/stable/c/d896843d8d925f0adbba319020595cfb1a7bcd57"
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},
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{
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"url": "https://git.kernel.org/stable/c/0675cff3c2924eb9b80d9dd250cf56a1140af157"
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},
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{
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"url": "https://git.kernel.org/stable/c/e8a2027b7e686784a69b2dfcee841d779919f313"
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},
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{
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"url": "https://git.kernel.org/stable/c/1719865b20b22c88d2a55e922eff5ca31b0841f6"
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},
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{
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"url": "https://git.kernel.org/stable/c/62126464f3a6159c0a3dd89e196ba65bfeb0afc6"
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},
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{
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"url": "https://git.kernel.org/stable/c/81d0d1e64f30d9989c829c0953cd6e6c68d9c5fb"
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}
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],
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"title": "net/sched: act_skbmod: fix length calculations and avoid invalid header warnings",
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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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} |