{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-35858", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-05-17T13:50:33.106Z", "datePublished": "2024-05-17T14:47:33.401Z", "dateUpdated": "2026-08-05T11:30:22.967Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:30:22.967Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: bcmasp: fix memory leak when bringing down interface\n\nWhen bringing down the TX rings we flush the rings but forget to\nreclaimed the flushed packets. This leads to a memory leak since we\ndo not free the dma mapped buffers. This also leads to tx control\nblock corruption when bringing down the interface for power\nmanagement." } ], "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 vulnerable code is the `bcmasp_netif_deinit()` teardown path of a platform Ethernet driver, reached only via `ndo_stop` (`ip link set down`) or a local PM suspend/resume cycle. No received packet or remote protocol interaction can drive interface teardown, so this requires local system access.\nAC:L - The triggering party controls both halves — flooding fragmented TX traffic guarantees in-flight descriptors at teardown, and the tiny `DESC_RING_COUNT` ring wraps into the stale `tx_cbs` region within milliseconds of resuming, so the premature `dev_consume_skb_any()` and subsequent double free are deterministic and repeatable. No unpredictable memory layout or victim state is required.\nPR:L - On the BRCMSTB set-top/embedded systems this driver targets, the suspend-to-WoL standby cycle that produces the `tx_cbs` corruption is an automatic system event, not an attacker privilege; an unprivileged local process only needs to be generating fragmented TX traffic when it occurs. Choosing the higher-severity option between low privilege and root, since the corruption path does not itself depend on CAP_NET_ADMIN.\nUI:N - Idle/autosleep standby entry and admin-scripted interface cycling (NetworkManager, DHCP renewal, WoL standby) occur with no victim action. The leak accrues on every interface-down with no interaction at all.\nS:U - The leaked memory, freed skbs, and corrupted slab freelist all live within the kernel's own security authority. There is no VM, IOMMU, or sandbox boundary crossed.\nC:H - The stale `last` flag frees an skb (releasing its fragment page references) while later descriptors for that same skb are still pending in the hardware ring and still DMA-mapped, so reallocated pages holding other processes' data can be DMA'd out onto the wire. The resulting `skbuff_head_cache` double free additionally yields overlapping allocations usable as a kernel read primitive.\nI:H - Freeing the same skb twice corrupts the SLUB freelist, allowing two live objects to alias the same memory — the standard route to a controlled kernel write and control-flow hijack. Skipped `dma_unmap_single()` also leaves the device with live mappings into memory that has been returned to the allocator.\nA:H - The double free trips SLUB's detection (BUG/panic) or silently corrupts the allocator into a later oops. Independently, the unreclaimed skbs and DMA mappings leak on every interface-down, exhausting memory and SWIOTLB/IOVA space over repeated up/down or standby cycles." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/ethernet/broadcom/asp2/bcmasp_intf.c" ], "versions": [ { "version": "490cb412007de593e07c1d3e2b1ec4233886707c", "lessThan": "09040baf8779ad880e0e0d0ea10e57aa929ef3ab", "status": "affected", "versionType": "git" }, { "version": "490cb412007de593e07c1d3e2b1ec4233886707c", "lessThan": "2389ad1990163d29cba5480d693b4c2e31cc545c", "status": "affected", "versionType": "git" }, { "version": "490cb412007de593e07c1d3e2b1ec4233886707c", "lessThan": "9f898fc2c31fbf0ac5ecd289f528a716464cb005", "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/broadcom/asp2/bcmasp_intf.c" ], "versions": [ { "version": "6.6", "status": "affected" }, { "version": "0", "lessThan": "6.6", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.30", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.8.9", "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": "6.6", "versionEndExcluding": "6.6.30" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.8.9" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.9" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/09040baf8779ad880e0e0d0ea10e57aa929ef3ab" }, { "url": "https://git.kernel.org/stable/c/2389ad1990163d29cba5480d693b4c2e31cc545c" }, { "url": "https://git.kernel.org/stable/c/9f898fc2c31fbf0ac5ecd289f528a716464cb005" } ], "title": "net: bcmasp: fix memory leak when bringing down interface", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T03:21:49.040Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/09040baf8779ad880e0e0d0ea10e57aa929ef3ab", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/2389ad1990163d29cba5480d693b4c2e31cc545c", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/9f898fc2c31fbf0ac5ecd289f528a716464cb005", "tags": [ "x_transferred" ] } ] }, { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2024-35858", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-09-10T15:41:37.023681Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T17:33:17.762Z" } } ] } }