{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-42280", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-07-30T07:40:12.261Z", "datePublished": "2024-08-17T09:08:47.699Z", "dateUpdated": "2026-08-05T11:36:19.140Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:36:19.140Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmISDN: Fix a use after free in hfcmulti_tx()\n\nDon't dereference *sp after calling dev_kfree_skb(*sp)." } ], "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 - `hfcmulti_tx()` is reached from `mISDN_sock_sendmsg()` → `handle_bmsg()`/`handle_dmsg()` on an `AF_ISDN` SOCK_DGRAM socket, i.e. a local syscall path, or from the card's IRQ/timer handler on the same host. There is no IP-network-facing consumer of this code.\nAC:L - The attacker deterministically arms the path by issuing two back-to-back `sendmsg()` calls so `bchannel_senddata()` sets `FLG_TX_NEXT`/`next_skb` (or `dchannel_senddata()` queues to `squeue`), guaranteeing `get_next_bframe()`/`get_next_dframe()` returns 1 and the post-free dereference executes. All call sites hold `hc->lock`, so there is no race to win and no memory-layout precondition.\nPR:L - `data_sock_create()` performs no `capable()` check — only `base_sock_create()` (ISDN_P_BASE/SOCK_RAW) requires `CAP_NET_RAW` — and `data_sock_bind()`/`connect_Bstack()` add no further gate, so any unprivileged local user can bind a B- or D-channel and drive the transmit path.\nUI:N - The attacker performs every step itself — socket, bind, PH_ACTIVATE_REQ, then the two queued sends — with no action required from an administrator or any other user.\nS:U - The freed object is a kernel `sk_buff` and any corruption stays within the kernel's own security authority; there is no VM, IOMMU, or sandbox boundary crossed.\nC:H - Per the published use-after-free, the stale `(*sp)->len` sizes a `write_fifo()` read from `(*sp)->data`, pushing freed-heap contents out onto the ISDN B-/D-channel to the far end of the line; heap grooming of the reclaimed skb makes this a controllable kernel-memory disclosure.\nI:H - A use-after-free lets the attacker reclaim the freed `sk_buff` with attacker-shaped data, so the `len` and `data` fields consumed afterwards become attacker-controlled, yielding a write/pointer primitive usable for control-flow hijacking.\nA:H - Dereferencing a freed skb and DMAing/PIO-ing from a dangling `data` pointer readily oopses or panics the kernel, and the sequence can be repeated at will from an unprivileged process." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/isdn/hardware/mISDN/hfcmulti.c" ], "versions": [ { "version": "af69fb3a8ffa37e986db00ed93099dc44babeef4", "lessThan": "70db2c84631f50e02e6b32b543700699dd395803", "status": "affected", "versionType": "git" }, { "version": "af69fb3a8ffa37e986db00ed93099dc44babeef4", "lessThan": "d3e4d4a98c5629ccdcb762a0ff6c82ba9738a0c3", "status": "affected", "versionType": "git" }, { "version": "af69fb3a8ffa37e986db00ed93099dc44babeef4", "lessThan": "9460ac3dd1ae033bc2b021a458fb535a0c36ddb2", "status": "affected", "versionType": "git" }, { "version": "af69fb3a8ffa37e986db00ed93099dc44babeef4", "lessThan": "8f4030277dfb9dbe04fd78566b19931097c9d629", "status": "affected", "versionType": "git" }, { "version": "af69fb3a8ffa37e986db00ed93099dc44babeef4", "lessThan": "4d8b642985ae24f4b3656438eb8489834a17bb80", "status": "affected", "versionType": "git" }, { "version": "af69fb3a8ffa37e986db00ed93099dc44babeef4", "lessThan": "ddc79556641ee070d36be0de4a1f0a16a71f1fc7", "status": "affected", "versionType": "git" }, { "version": "af69fb3a8ffa37e986db00ed93099dc44babeef4", "lessThan": "7e4a539bca7d8d20f2c5d93c18cce8ef77cd78e0", "status": "affected", "versionType": "git" }, { "version": "af69fb3a8ffa37e986db00ed93099dc44babeef4", "lessThan": "61ab751451f5ebd0b98e02276a44e23a10110402", "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/isdn/hardware/mISDN/hfcmulti.c" ], "versions": [ { "version": "2.6.27", "status": "affected" }, { "version": "0", "lessThan": "2.6.27", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.320", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.282", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.224", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.165", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.103", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.44", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.10.3", "lessThanOrEqual": "6.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.11", "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": "2.6.27", "versionEndExcluding": "4.19.320" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "5.4.282" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "5.10.224" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "5.15.165" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "6.1.103" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "6.6.44" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "6.10.3" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "6.11" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/70db2c84631f50e02e6b32b543700699dd395803" }, { "url": "https://git.kernel.org/stable/c/d3e4d4a98c5629ccdcb762a0ff6c82ba9738a0c3" }, { "url": "https://git.kernel.org/stable/c/9460ac3dd1ae033bc2b021a458fb535a0c36ddb2" }, { "url": "https://git.kernel.org/stable/c/8f4030277dfb9dbe04fd78566b19931097c9d629" }, { "url": "https://git.kernel.org/stable/c/4d8b642985ae24f4b3656438eb8489834a17bb80" }, { "url": "https://git.kernel.org/stable/c/ddc79556641ee070d36be0de4a1f0a16a71f1fc7" }, { "url": "https://git.kernel.org/stable/c/7e4a539bca7d8d20f2c5d93c18cce8ef77cd78e0" }, { "url": "https://git.kernel.org/stable/c/61ab751451f5ebd0b98e02276a44e23a10110402" } ], "title": "mISDN: Fix a use after free in hfcmulti_tx()", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2024-42280", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-09-10T16:11:39.682152Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-12T17:33:31.049Z" } }, { "title": "CVE Program Container", "references": [ { "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html" }, { "url": "https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html" } ], "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T22:03:20.326Z" } } ] } }