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-2026-45843",
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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": "2026-05-13T15:03:33.078Z",
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"datePublished": "2026-05-27T09:24:45.516Z",
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"dateUpdated": "2026-10-19T19:26:38.168Z"
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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": "2026-08-05T12:28:27.680Z"
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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\nslip: bound decode() reads against the compressed packet length\n\nslhc_uncompress() parses a VJ-compressed TCP header by advancing a\npointer through the packet via decode() and pull16(). Neither helper\nbounds-checks against isize, and decode() masks its return with\n& 0xffff so it can never return the -1 that callers test for -- those\nerror paths are dead code.\n\nA short compressed frame whose change byte requests optional fields\nlets decode() read past the end of the packet. The over-read bytes\nare folded into the cached cstate and reflected into subsequent\nreconstructed packets.\n\nMake decode() and pull16() take the packet end pointer and return -1\nwhen exhausted. Add a bounds check before the TCP-checksum read.\nThe existing == -1 tests now do what they were always meant to."
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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:L/A:N",
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"baseScore": 8.2,
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"baseSeverity": "HIGH"
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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 - slhc_uncompress() processes VJ-compressed headers received from the remote PPP/SLIP link peer; via PPP-over-PPTP/L2TP tunnels that peer is an internet-reachable attacker sending crafted frames.\nAC:L - A short compressed frame with a change byte requesting optional fields reliably triggers the over-read; no race, timing, or memory-layout condition outside the attacker's control.\nPR:N - The attacker is a remote link peer (e.g., malicious VPN/dial-up server, or a client of the target's PPTP/L2TP server) with no account or privilege on the target host.\nUI:N - Once a VJ-enabled PPP link exists, the malicious frame is processed automatically; in the attacker-initiated server scenario no victim action is needed at exploit time.\nS:U - The over-read and its effects stay within the kernel's own decompression buffers and state; no crossing into another security authority.\nC:H - Out-of-bounds read of adjacent memory — including uninitialized kernel slab memory in the PPP fresh-skb path — folded into reconstructed TCP/IP header fields delivered to the IP stack, disclosing kernel memory.\nI:L - The over-read pollutes the cached decompression state (cs_tcp/cs_ip) and corrupts header fields of subsequently reconstructed packets with stale data, but yields no arbitrary or out-of-bounds write primitive.\nA:N - Guaranteed buffer slack plus the len<0 rejection keep all reads within the allocation and prevent any out-of-bounds write, so there is no crash, hang, or panic."
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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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"drivers/net/slip/slhc.c"
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],
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{
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"drivers/net/slip/slhc.c"
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],
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"versions": [
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{
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"version": "2.6.12",
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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": "2.6.12",
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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": "5.10.258",
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"lessThanOrEqual": "5.10.*",
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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": "5.15.209",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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},
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"version": "6.1.175",
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"status": "unaffected",
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},
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"version": "6.6.141",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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},
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{
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"version": "6.12.91",
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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": "6.18.33",
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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": "7.0.10",
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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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"cpeApplicability": [
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"url": "https://git.kernel.org/stable/c/0511ecb00e61bf28e2fec4bb41fcce385c3a3b2d"
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"url": "https://git.kernel.org/stable/c/4c1367a2d7aad643a6f87c6931b13cc1a25e8ca7"
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}
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],
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"title": "slip: bound decode() reads against the compressed packet length",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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"shortName": "siemens-SADP",
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"dateUpdated": "2026-10-15T01:19:46.866Z"
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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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"type": "ssvc",
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"content": {
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"id": "CVE-2026-45843",
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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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"Automatable": "yes"
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"Technical Impact": "partial"
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"version": "2.0.3",
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"timestamp": "2026-10-16T15:17:54.838787Z"
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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-126",
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"description": "CWE-126 Buffer Over-read"
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}
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}
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} |