{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-50252", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-09-15T13:58:00.973Z", "datePublished": "2025-09-15T14:02:30.980Z", "dateUpdated": "2026-08-05T08:57:56.935Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:57:56.935Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nigb: Do not free q_vector unless new one was allocated\n\nAvoid potential use-after-free condition under memory pressure. If the\nkzalloc() fails, q_vector will be freed but left in the original\nadapter->q_vector[v_idx] array position." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The bug is reached only via local ethtool channel reconfiguration (ETHTOOL_SCHANNELS / ETHTOOL_MSG_CHANNELS_SET → igb_set_channels → igb_reinit_queues → igb_alloc_q_vector), not via received network packets or a remote protocol parser.\nAC:L - The attacker fully controls the ethtool -L call that grows q_vector size across the QUEUE_PAIRS threshold, and a local attacker can induce the required kzalloc() failure through memory exhaustion, so success does not depend on conditions outside their influence.\nPR:L - Triggering requires CAP_NET_ADMIN on the netns that owns the igb netdev (ns_capable / GENL_UNS_ADMIN_PERM), which is available to unprivileged userns/container tenants given an igb interface and is not full init-namespace root.\nUI:N - No separate victim action is required; the attacker issues the privileged ethtool/netlink request themselves.\nS:U - This is a host-kernel heap UAF in the igb PF driver with impact confined to the same kernel privilege domain; it is not a VM/IOMMU/sandbox boundary escape.\nC:H - The failed realloc leaves a dangling adapter->q_vector[] pointer to a freed object (including embedded rings/NAPI state), giving a classic UAF read primitive over reclaimable kernel heap memory.\nI:H - The same UAF/double-free of igb_q_vector (containing napi_struct and related pointers) is heap-sprayable into an arbitrary write / control-flow hijack, enabling code execution in kernel context.\nA:H - Use of the dangling q_vector on retry, teardown, or other driver paths causes kernel oops/panic or double-free, so availability impact is high even without a full exploit." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/ethernet/intel/igb/igb_main.c" ], "versions": [ { "version": "72ddef0506da852dc82f078f37ced8ef4d74a2bf", "lessThan": "64ca1969599857143e91aeec4440640656100803", "status": "affected", "versionType": "git" }, { "version": "72ddef0506da852dc82f078f37ced8ef4d74a2bf", "lessThan": "0200f0fbb11e359cc35af72ab10b2ec224e6f633", "status": "affected", "versionType": "git" }, { "version": "72ddef0506da852dc82f078f37ced8ef4d74a2bf", "lessThan": "68e8adbcaf7a8743e473343b38b9dad66e2ac6f3", "status": "affected", "versionType": "git" }, { "version": "72ddef0506da852dc82f078f37ced8ef4d74a2bf", "lessThan": "f96bd8adc8adde25390965a8c1ee81b73cb62075", "status": "affected", "versionType": "git" }, { "version": "72ddef0506da852dc82f078f37ced8ef4d74a2bf", "lessThan": "3cb18dea11196fb4a06f78294cec5e61985e1aff", "status": "affected", "versionType": "git" }, { "version": "72ddef0506da852dc82f078f37ced8ef4d74a2bf", "lessThan": "314f7092b27749bdde44c14095b5533afa2a3bc8", "status": "affected", "versionType": "git" }, { "version": "72ddef0506da852dc82f078f37ced8ef4d74a2bf", "lessThan": "6e399577bd397a517df4b938601108c63769ce0a", "status": "affected", "versionType": "git" }, { "version": "72ddef0506da852dc82f078f37ced8ef4d74a2bf", "lessThan": "56483aecf6b22eb7dff6315b3a174688c6ad494c", "status": "affected", "versionType": "git" }, { "version": "72ddef0506da852dc82f078f37ced8ef4d74a2bf", "lessThan": "0668716506ca66f90d395f36ccdaebc3e0e84801", "status": "affected", "versionType": "git" }, { "version": "5be042b1917ddf444c20f4e12856535307b37c01", "status": "affected", "versionType": "git" }, { "version": "a0e26ed623a1e1460c1a191fbc0f37bddab7851a", "status": "affected", "versionType": "git" }, { "version": "f4b7f93cd34a6153d454a837708fd4203990d1ae", "status": "affected", "versionType": "git" }, { "version": "3.18.23", "lessThan": "3.19", "status": "affected", "versionType": "semver" }, { "version": "4.1.9", "lessThan": "4.2", "status": "affected", "versionType": "semver" }, { "version": "4.2.2", "lessThan": "4.3", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/ethernet/intel/igb/igb_main.c" ], "versions": [ { "version": "4.3", "status": "affected" }, { "version": "0", "lessThan": "4.3", "status": "unaffected", "versionType": "semver" }, { "version": "4.9.337", "lessThanOrEqual": "4.9.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.14.303", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.270", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.229", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.163", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.86", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.0.16", "lessThanOrEqual": "6.0.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.2", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "4.9.337" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "4.14.303" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "4.19.270" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "5.4.229" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "5.10.163" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "5.15.86" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "6.0.16" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "6.1.2" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "6.2" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.18.23" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.1.9" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.2.2" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/64ca1969599857143e91aeec4440640656100803" }, { "url": "https://git.kernel.org/stable/c/0200f0fbb11e359cc35af72ab10b2ec224e6f633" }, { "url": "https://git.kernel.org/stable/c/68e8adbcaf7a8743e473343b38b9dad66e2ac6f3" }, { "url": "https://git.kernel.org/stable/c/f96bd8adc8adde25390965a8c1ee81b73cb62075" }, { "url": "https://git.kernel.org/stable/c/3cb18dea11196fb4a06f78294cec5e61985e1aff" }, { "url": "https://git.kernel.org/stable/c/314f7092b27749bdde44c14095b5533afa2a3bc8" }, { "url": "https://git.kernel.org/stable/c/6e399577bd397a517df4b938601108c63769ce0a" }, { "url": "https://git.kernel.org/stable/c/56483aecf6b22eb7dff6315b3a174688c6ad494c" }, { "url": "https://git.kernel.org/stable/c/0668716506ca66f90d395f36ccdaebc3e0e84801" } ], "title": "igb: Do not free q_vector unless new one was allocated", "x_generator": { "engine": "bippy-1.2.0" } } } }