243 lines
13 KiB
JSON
243 lines
13 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-2026-72109",
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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": "2026-08-09T03:40:39.906Z",
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"datePublished": "2026-08-15T05:52:51.067Z",
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"dateUpdated": "2026-08-17T05:40:22.667Z"
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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": "2026-08-17T05:40:22.667Z"
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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: sparx5: unregister blocking notifier on init failure\n\nsparx5_register_notifier_blocks() registers the switchdev blocking\nnotifier before allocating the ordered workqueue. If the workqueue\nallocation fails, the error path unregisters the switchdev and netdevice\nnotifiers, but leaves the blocking notifier registered.\n\nAdd a separate error label for the workqueue allocation failure path and\nunregister the switchdev blocking notifier there."
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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 - Exploitation reaches sparx5_switchdev_blocking_event through global switchdev blocking notifier callbacks fired by local bridge/VLAN/MDB configuration via rtnetlink, not by processing remote packets on Sparx5 switch ports.\nAC:L - After a sparx5 probe workqueue ENOMEM leaves the blocking notifier registered and devm frees sparx5, an attacker can reliably trigger call_switchdev_blocking_notifiers with ordinary bridge or VLAN netlink operations without uncontrollable races.\nPR:L - Triggering switchdev blocking events requires CAP_NET_ADMIN for bridge/VLAN changes; unprivileged users can obtain that capability in user/network namespaces and invoke the global notifier chain from their own bridge configuration.\nUI:N - No victim interaction is required beyond the attacker performing network administration operations; no user must open files, mount filesystems, or click anything to reach the stale notifier callback.\nS:U - The use-after-free corrupts kernel memory within the same kernel security authority on Sparx5/LAN969x switch platforms, enabling local privilege escalation but not VM escape or other cross-authority boundary bypass by itself.\nC:H - The leaked switchdev_blocking_nb remains on a global chain after devm frees the containing sparx5 structure; sparx5_switchdev_blocking_event dereferences it via container_of, creating a use-after-free that can disclose kernel memory.\nI:H - UAF callbacks such as sparx5_handle_port_vlan_add and MDB handlers dereference freed sparx5 state and can write through sparx5_mact_learn and related hardware programming, enabling memory corruption and potential arbitrary code execution.\nA:H - Dereferencing freed notifier_block and sparx5 structures during global switchdev blocking events can cause kernel oops, panic, or hang, disrupting availability on enterprise, industrial, and automotive Sparx5-managed switch systems."
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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/ethernet/microchip/sparx5/sparx5_switchdev.c"
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],
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"versions": [
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{
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"version": "d6fce5141929697a27f029c633433d487f6f62cb",
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"lessThan": "fbc65b17508ed5464b7106e7fa5f15251ca1b603",
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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": "d6fce5141929697a27f029c633433d487f6f62cb",
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"lessThan": "e5afc6d3fabdf1f605d63c4b34a3df6c359e81f3",
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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": "d6fce5141929697a27f029c633433d487f6f62cb",
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"lessThan": "cf419c869e0d03aad4b6f4ecf0a813851930dfe7",
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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": "d6fce5141929697a27f029c633433d487f6f62cb",
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"lessThan": "d6084c47389fd6978a5d66b0d58206a548c792a9",
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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": "d6fce5141929697a27f029c633433d487f6f62cb",
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"lessThan": "8a3c44a003176282ee4306b7c96e5a536c6f0707",
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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": "d6fce5141929697a27f029c633433d487f6f62cb",
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"lessThan": "17f113e7b622dc850992ade540181717de6a8561",
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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": "d6fce5141929697a27f029c633433d487f6f62cb",
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"lessThan": "483be61b4a9a6df3b7cb277e8f189e082dee4cb8",
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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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"drivers/net/ethernet/microchip/sparx5/sparx5_switchdev.c"
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],
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"versions": [
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{
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"version": "5.14",
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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": "5.14",
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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": "5.15.212",
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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": "6.1.178",
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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": "6.6.145",
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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": "6.12.97",
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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": "6.18.40",
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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": "7.1.5",
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"lessThanOrEqual": "7.1.*",
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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": "7.2",
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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": "5.14",
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"versionEndExcluding": "5.15.212"
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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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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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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/fbc65b17508ed5464b7106e7fa5f15251ca1b603"
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},
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{
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"url": "https://git.kernel.org/stable/c/e5afc6d3fabdf1f605d63c4b34a3df6c359e81f3"
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},
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{
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"url": "https://git.kernel.org/stable/c/cf419c869e0d03aad4b6f4ecf0a813851930dfe7"
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},
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{
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"url": "https://git.kernel.org/stable/c/d6084c47389fd6978a5d66b0d58206a548c792a9"
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},
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{
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"url": "https://git.kernel.org/stable/c/8a3c44a003176282ee4306b7c96e5a536c6f0707"
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},
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{
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"url": "https://git.kernel.org/stable/c/17f113e7b622dc850992ade540181717de6a8561"
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},
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{
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"url": "https://git.kernel.org/stable/c/483be61b4a9a6df3b7cb277e8f189e082dee4cb8"
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}
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],
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"title": "net: sparx5: unregister blocking notifier on init failure",
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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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} |