{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-49026", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-08-22T01:27:53.651Z", "datePublished": "2024-10-21T20:06:31.876Z", "dateUpdated": "2026-08-05T08:53:32.469Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:53:32.469Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ne100: Fix possible use after free in e100_xmit_prepare\n\nIn e100_xmit_prepare(), if we can't map the skb, then return -ENOMEM, so\ne100_xmit_frame() will return NETDEV_TX_BUSY and the upper layer will\nresend the skb. But the skb is already freed, which will cause UAF bug\nwhen the upper layer resends the skb.\n\nRemove the harmful free." } ], "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 UAF is in the e100 ndo_start_xmit path (e100_xmit_frame → e100_exec_cb → e100_xmit_prepare), reached when a local process transmits via an ordinary socket send routed over the e100 netdev; remote peers do not parse into this TX-prepare path.\nAC:L - Once DMA mapping fails, the free-then-NETDEV_TX_BUSY requeue UAF is deterministic with no race; a local attacker can induce mapping failure by exhausting swiotlb/IOMMU resources against this 32-bit DMA device, which is within attacker influence.\nPR:L - Any unprivileged local user can send packets out an up e100 interface through the generic networking stack; no CAP_NET_ADMIN or other capability is required on the transmit path.\nUI:N - The attacker triggers the TX path and resource exhaustion themselves via their own send syscalls; no victim action is required.\nS:U - This is a standard in-kernel skb heap UAF enabling local privilege escalation within the same kernel security authority, with no VM, IOMMU, or sandbox boundary crossed.\nC:H - Use-after-free of the requeued skb allows heap spraying and reuse of the freed object, enabling arbitrary kernel memory disclosure primitives.\nI:H - The same skb UAF (and the dangling cb->skb later freed again in e100_clean_cbs) enables heap corruption and write primitives suitable for control-flow hijacking or arbitrary kernel writes.\nA:H - Reusing the freed skb on TX retry or interface cleanup reliably causes kernel oops/panic 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/e100.c" ], "versions": [ { "version": "5e5d49422dfb035ca9e280cd61d434095c151272", "lessThan": "b775f37d943966f6f77dca402f5a9dedce502c25", "status": "affected", "versionType": "git" }, { "version": "5e5d49422dfb035ca9e280cd61d434095c151272", "lessThan": "9fc27d22cdb9b1fcd754599d216a8992fed280cd", "status": "affected", "versionType": "git" }, { "version": "5e5d49422dfb035ca9e280cd61d434095c151272", "lessThan": "b46f6144ab89d3d757ead940759c505091626a7d", "status": "affected", "versionType": "git" }, { "version": "5e5d49422dfb035ca9e280cd61d434095c151272", "lessThan": "45605c75c52c7ae7bfe902214343aabcfe5ba0ff", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/ethernet/intel/e100.c" ], "versions": [ { "version": "4.3", "status": "affected" }, { "version": "0", "lessThan": "4.3", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.158", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.82", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.0.12", "lessThanOrEqual": "6.0.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1", "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": "5.10.158" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "5.15.82" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "6.0.12" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "6.1" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/b775f37d943966f6f77dca402f5a9dedce502c25" }, { "url": "https://git.kernel.org/stable/c/9fc27d22cdb9b1fcd754599d216a8992fed280cd" }, { "url": "https://git.kernel.org/stable/c/b46f6144ab89d3d757ead940759c505091626a7d" }, { "url": "https://git.kernel.org/stable/c/45605c75c52c7ae7bfe902214343aabcfe5ba0ff" } ], "title": "e100: Fix possible use after free in e100_xmit_prepare", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2022-49026", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-10-22T13:11:54.975076Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-10-22T13:18:36.450Z" } } ] } }