{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-35901", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-05-17T13:50:33.114Z", "datePublished": "2024-05-19T08:34:54.879Z", "dateUpdated": "2026-08-05T11:30:52.091Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:30:52.091Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: mana: Fix Rx DMA datasize and skb_over_panic\n\nmana_get_rxbuf_cfg() aligns the RX buffer's DMA datasize to be\nmultiple of 64. So a packet slightly bigger than mtu+14, say 1536,\ncan be received and cause skb_over_panic.\n\nSample dmesg:\n[ 5325.237162] skbuff: skb_over_panic: text:ffffffffc043277a len:1536 put:1536 head:ff1100018b517000 data:ff1100018b517100 tail:0x700 end:0x6ea dev:\n[ 5325.243689] ------------[ cut here ]------------\n[ 5325.245748] kernel BUG at net/core/skbuff.c:192!\n[ 5325.247838] invalid opcode: 0000 [#1] PREEMPT SMP NOPTI\n[ 5325.258374] RIP: 0010:skb_panic+0x4f/0x60\n[ 5325.302941] Call Trace:\n[ 5325.304389] \n[ 5325.315794] ? skb_panic+0x4f/0x60\n[ 5325.317457] ? asm_exc_invalid_op+0x1f/0x30\n[ 5325.319490] ? skb_panic+0x4f/0x60\n[ 5325.321161] skb_put+0x4e/0x50\n[ 5325.322670] mana_poll+0x6fa/0xb50 [mana]\n[ 5325.324578] __napi_poll+0x33/0x1e0\n[ 5325.326328] net_rx_action+0x12e/0x280\n\nAs discussed internally, this alignment is not necessary. To fix\nthis bug, remove it from the code. So oversized packets will be\nmarked as CQE_RX_TRUNCATED by NIC, and dropped." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:N - The bug is triggered purely by a received Ethernet frame processed in the MANA NIC's NAPI RX path, before any protocol demux or socket lookup, so a remote attacker anywhere on the routed network can reach it. On the very common Azure configuration where the VM MTU is set below the path MTU (VPN Gateway / ExpressRoute / AKS overlay guidance), ordinary full-size internet packets fall directly into the oversized window.\nAC:L - The attacker fully controls the only variable that matters — packet length — and can simply sweep sizes until one lands in the (mtu+14, ALIGN(mtu+14,64)] window, which is non-empty for the default MTU 1500. No race, no memory-layout grooming, and no state outside the attacker's control is involved.\nPR:N - No authentication or credentials of any kind are needed; the panic occurs in mana_build_skb() before eth_type_trans() and before netfilter, so the frame need not even be addressed to a listening service or survive a firewall rule. Any unauthenticated party able to send a frame to the interface triggers it.\nUI:N - Triggering requires only that the victim's interface be up and receiving; the panic happens in softirq context during normal packet reception with no action by any local user or administrator.\nS:U - The vulnerable code and the impacted resource are both the host kernel — a standard in-kernel crash with no crossing of a VM, IOMMU, or sandbox security authority.\nC:N - No data is disclosed to the attacker: the overlong DMA writes the attacker's own packet bytes into the buffer's skb_shared_info scratch area within the same allocation, and skb_over_panic() aborts immediately, so no kernel memory is read back or leaked over the wire.\nI:N - The excess DMA stays inside the allocated page/fragment, targets a region that is not a live object at DMA time and is re-zeroed by napi_build_skb(), and every packet reaching it hits the unconditional BUG() in the same call path — so no adjacent object is corrupted and no write primitive is obtained.\nA:H - skb_put() detects tail > end and calls skb_over_panic() → BUG() from within NAPI/softirq context, producing a fatal exception in interrupt and a full kernel panic. A single crafted packet takes the machine down, and it can be repeated at will against every affected Azure VM." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/ethernet/microsoft/mana/mana_en.c", "include/net/mana/mana.h" ], "versions": [ { "version": "2fbbd712baf1c60996554326728bbdbef5616e12", "lessThan": "ca58927b00385005f488b6a9905ced7a4f719aad", "status": "affected", "versionType": "git" }, { "version": "2fbbd712baf1c60996554326728bbdbef5616e12", "lessThan": "05cb7c41fa1a7a7b2c2a6b81bbe7c67f5c11932b", "status": "affected", "versionType": "git" }, { "version": "2fbbd712baf1c60996554326728bbdbef5616e12", "lessThan": "c0de6ab920aafb56feab56058e46b688e694a246", "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/microsoft/mana/mana_en.c", "include/net/mana/mana.h" ], "versions": [ { "version": "6.4", "status": "affected" }, { "version": "0", "lessThan": "6.4", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.26", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.8.5", "lessThanOrEqual": "6.8.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.9", "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": "6.4", "versionEndExcluding": "6.6.26" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.8.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.9" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/ca58927b00385005f488b6a9905ced7a4f719aad" }, { "url": "https://git.kernel.org/stable/c/05cb7c41fa1a7a7b2c2a6b81bbe7c67f5c11932b" }, { "url": "https://git.kernel.org/stable/c/c0de6ab920aafb56feab56058e46b688e694a246" } ], "title": "net: mana: Fix Rx DMA datasize and skb_over_panic", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "title": "CISA ADP Vulnrichment", "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2024-35901", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-05-20T17:12:59.513048Z" } } } ], "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-06-04T17:34:11.575Z" } }, { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T03:21:48.589Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/ca58927b00385005f488b6a9905ced7a4f719aad", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/05cb7c41fa1a7a7b2c2a6b81bbe7c67f5c11932b", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/c0de6ab920aafb56feab56058e46b688e694a246", "tags": [ "x_transferred" ] } ] } ] } }