338 lines
17 KiB
JSON
338 lines
17 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-2026-53228",
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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": "2026-06-09T07:44:35.393Z",
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"datePublished": "2026-06-25T08:39:27.893Z",
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"dateUpdated": "2026-10-19T19:57:30.192Z"
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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": "2026-08-05T12:34:20.273Z"
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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\nipv6: sit: reload inner IPv6 header after GSO offloads\n\nipip6_tunnel_xmit() caches the inner IPv6 header pointer at function\nentry and continues using it after iptunnel_handle_offloads().\n\nFor GSO skbs, iptunnel_handle_offloads() calls skb_header_unclone().\nWhen the skb header is cloned, skb_header_unclone() can call\npskb_expand_head(), which may move the skb head. The pskb_expand_head()\ncontract requires pointers into the skb header to be reloaded after the\ncall.\n\nIf the later skb_realloc_headroom() branch is not taken, SIT uses the\nstale iph6 pointer to read the inner hop limit and DS field. That can\nread from a freed skb head after the old head's remaining clone is\nreleased.\n\nReload iph6 after the offload helper succeeds and before subsequent\nreads from the inner IPv6 header. Keep the existing reload after\nskb_realloc_headroom(), since that branch can also replace the skb."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 9.8,
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"baseSeverity": "CRITICAL"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:N - The vulnerable SIT transmit path can be reached by network-triggered IPv6 traffic in a reasonable deployment where a public service or router sends large TCP/GSO packets through a configured SIT tunnel.\nAC:L - There is no race or fragile timing requirement; GSO and header-cloned TCP skbs are normal for large TCP transmissions, and the attacker can repeatedly trigger them with network traffic.\nPR:N - In the network-triggered scenario, the attacker does not need local privileges or authentication; the required SIT configuration is an environmental precondition on the victim.\nUI:N - No victim user action is required beyond the system processing network traffic through the configured SIT tunnel.\nS:U - The impact remains within the kernel and its networking security authority, with no VM, IOMMU, or separate security-scope boundary crossed.\nC:H - The stale inner IPv6 header pointer can read from freed skb head memory after `skb_header_unclone()`/`pskb_expand_head()`, making this a kernel use-after-free read. Per kernel CVSS guidance, use-after-free conditions are scored with high confidentiality impact.\nI:H - Although the immediate stale access feeds header fields, it is a kernel use-after-free in attacker-triggerable networking memory, and kernel UAFs are treated as potentially exploitable for heap manipulation and integrity compromise.\nA:H - Use-after-free in the kernel networking transmit path can lead to oops, panic, or repeated crash conditions, especially under memory debugging or unfavorable heap reuse."
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}
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]
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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/ipv6/sit.c"
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],
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"versions": [
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{
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"version": "14909664e4e192f4c6f6fcdccd9919af7cf783ab",
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"net/ipv6/sit.c"
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],
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"version": "0",
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"status": "unaffected",
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},
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{
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"version": "5.10.259",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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},
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{
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"version": "5.15.210",
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"lessThanOrEqual": "5.15.*",
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},
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"version": "6.1.176",
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"version": "6.6.143",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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},
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"version": "6.12.94",
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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": "6.18.36",
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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": "7.0.13",
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"lessThanOrEqual": "7.0.*",
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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": "7.1",
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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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"cpeApplicability": [
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"url": "https://git.kernel.org/stable/c/2fa49b2715e1bad12ce3b0fa64e234d9582c8193"
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}
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],
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"title": "ipv6: sit: reload inner IPv6 header after GSO offloads",
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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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"adp": [
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{
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"x_adpType": "supplier",
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"providerMetadata": {
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"orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
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"shortName": "siemens-SADP",
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"dateUpdated": "2026-10-15T01:22:51.790Z"
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},
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"affected": [
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{
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"vendor": "Siemens",
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"product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem",
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"versions": [
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{
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"status": "affected",
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{
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"metrics": [
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"type": "ssvc",
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"content": {
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"id": "CVE-2026-53228",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "yes"
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},
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{
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"Technical Impact": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-16T15:27:17.714387Z"
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}
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}
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"type": "CWE",
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"cweId": "CWE-416",
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"description": "CWE-416 Use After Free"
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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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} |