342 lines
17 KiB
JSON
342 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-2022-49921",
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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": "2025-05-01T14:05:17.252Z",
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"datePublished": "2025-05-01T14:11:00.309Z",
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"dateUpdated": "2026-08-05T08:56:42.811Z"
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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": "2026-08-05T08:56:42.811Z"
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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: Fix use after free in red_enqueue()\n\nWe can't use \"skb\" again after passing it to qdisc_enqueue(). This is\nbasically identical to commit 2f09707d0c97 (\"sch_sfb: Also store skb\nlen before calling child enqueue\")."
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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:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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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:L - The bug is in the tc/qdisc RED enqueue path, reached by configuring a qdisc via netlink (RTM_NEWQDISC) and sending traffic through that device; per kernel guidance, tc/qdisc bugs are Local.\nAC:L - An attacker who configures RED with a child that frees skbs on successful enqueue (e.g. CAKE with GSO split or TBF GSO segmentation) can deterministically trigger the UAF by sending GSO packets; no conditions outside attacker control are required.\nPR:L - Creating/modifying qdiscs requires CAP_NET_ADMIN, but that capability is obtainable in an unprivileged user+network namespace via unshare/clone, so Privileges Required is Low rather than High.\nUI:N - Once the attacker has set up the qdisc hierarchy in their namespace, they can trigger the UAF by sending packets themselves with no victim interaction.\nS:U - This is a standard in-kernel memory corruption/privilege-escalation issue within the same OS security authority; it does not cross VM, IOMMU, or other security boundaries.\nC:H - This is a use-after-free on an sk_buff; per CVSS kernel guidance, UAFs enable control of freed object contents and are scored as High confidentiality impact.\nI:H - Use-after-free of sk_buff enables heap reuse/spraying and can be leveraged for arbitrary write or control-flow hijacking, so Integrity is High.\nA:H - Use-after-free of a freed skb can cause kernel oops/panic when the reclaimed memory is accessed or unmapped, so Availability is High."
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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/sched/sch_red.c"
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],
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"versions": [
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{
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"version": "d7f4f332f082c4d4ba53582f902ed6b44fd6f45e",
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"lessThan": "795afe0b9bb6c915f0299a8e309936519be01619",
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"status": "affected",
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{
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"lessThan": "fc4b50adb400ee5ec527a04073174e8e73a139fa",
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"status": "affected",
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},
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{
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"version": "d7f4f332f082c4d4ba53582f902ed6b44fd6f45e",
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"lessThan": "170e5317042c302777ed6d59fdb84af9b0219d4e",
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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": "d7f4f332f082c4d4ba53582f902ed6b44fd6f45e",
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"lessThan": "8bdc2acd420c6f3dd1f1c78750ec989f02a1e2b9",
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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": "ab0b3b9dbf559a5633d460e748144697bd2d3aa3",
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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": "4.4.163",
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"lessThan": "4.5",
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"status": "affected",
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"versionType": "semver"
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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/sch_red.c"
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],
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"versions": [
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{
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"version": "4.7",
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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": "4.7",
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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": "4.9.333",
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"lessThanOrEqual": "4.9.*",
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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": "4.14.299",
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"lessThanOrEqual": "4.14.*",
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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": "4.19.265",
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"lessThanOrEqual": "4.19.*",
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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": "5.4.224",
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"lessThanOrEqual": "5.4.*",
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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": "5.10.154",
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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": "5.15.78",
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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": "6.0.8",
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"lessThanOrEqual": "6.0.*",
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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": "6.1",
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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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}
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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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"versionStartIncluding": "4.7",
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/795afe0b9bb6c915f0299a8e309936519be01619"
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},
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{
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"url": "https://git.kernel.org/stable/c/a238cdcf2bdc72207c74375fc8be13ee549ca9db"
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},
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{
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"url": "https://git.kernel.org/stable/c/e877f8fa49fbccc63cb2df2e9179bddc695b825a"
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},
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{
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"url": "https://git.kernel.org/stable/c/52e0429471976785c155bfbf51d80990c6cd46e2"
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},
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{
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"url": "https://git.kernel.org/stable/c/5960b9081baca85cc7dcb14aec1de85999ea9d36"
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},
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{
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"url": "https://git.kernel.org/stable/c/fc4b50adb400ee5ec527a04073174e8e73a139fa"
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},
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{
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"url": "https://git.kernel.org/stable/c/170e5317042c302777ed6d59fdb84af9b0219d4e"
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},
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{
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"url": "https://git.kernel.org/stable/c/8bdc2acd420c6f3dd1f1c78750ec989f02a1e2b9"
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}
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],
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"title": "net: sched: Fix use after free in red_enqueue()",
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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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"problemTypes": [
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{
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"descriptions": [
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{
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"type": "CWE",
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"cweId": "CWE-416",
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"lang": "en",
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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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"metrics": [
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{
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"cvssV3_1": {
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"scope": "UNCHANGED",
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"version": "3.1",
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"baseScore": 7.8,
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"attackVector": "LOCAL",
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"baseSeverity": "HIGH",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"integrityImpact": "HIGH",
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"userInteraction": "NONE",
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"attackComplexity": "LOW",
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"availabilityImpact": "HIGH",
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"privilegesRequired": "LOW",
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"confidentialityImpact": "HIGH"
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}
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},
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2025-10-01T14:58:28.989555Z",
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"id": "CVE-2022-49921",
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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": "no"
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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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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2025-10-01T14:58:31.797Z"
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}
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}
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]
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}
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} |