{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-44998", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-08-21T05:34:56.672Z", "datePublished": "2024-09-04T19:54:42.826Z", "dateUpdated": "2026-08-05T11:37:36.271Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:37:36.271Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\natm: idt77252: prevent use after free in dequeue_rx()\n\nWe can't dereference \"skb\" after calling vcc->push() because the skb\nis released." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL" }, "scenarios": [ { "lang": "en", "value": "AV:N - The UAF is triggered purely by an AAL5 PDU received from the remote end of an ATM virtual circuit, processed in the card's interrupt handler before any higher-layer filtering. ATM VCs are switched WAN circuits (DSL/backhaul), and via br2684/pppoatm they carry ordinary internet traffic, so the attacker set extends beyond a single shared segment.\nAC:L - The attacker fully controls both the packet size (choosing the single-skb reassembly branch) and the encapsulation header that forces br2684_push()/pppoatm_push() down their `kfree_skb()` error path, making the use-after-free deterministic on a single packet with no race to win.\nPR:N - No authentication or authorization exists anywhere on this path — the skb is freed and then re-dereferenced inside the driver's hardirq receive handler, long before any application-level credential check.\nUI:N - The vulnerable code runs automatically on packet reception; no local user must open, mount, or interact with anything for the attacker's frame to be processed.\nS:U - The freed sk_buff and the corrupted buffer-management state are both kernel resources managed by the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - This is a use-after-free read of a slab object the attacker can groom by keeping concurrent traffic in flight, so the reclaimed sk_buff contents are read back into driver control flow — per kernel UAF convention this constitutes a high-confidentiality read primitive.\nI:H - A use-after-free on a sprayable slab object allows the attacker to influence the value the driver consumes, which in turn drives subsequent skb allocation, DMA mapping, and free-buffer-queue bookkeeping; UAFs of this class are treated as exploitable for arbitrary write/control-flow hijacking.\nA:H - The stale read occurs in hardirq context and panics KASAN/KFENCE/panic_on_warn kernels; even on stock kernels, repeated remote packets cause the wrong free-buffer queue to be refilled, starving the correct SAR FBQ and permanently stalling the card's receive path." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/atm/idt77252.c" ], "versions": [ { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "628ea82190a678a56d2ec38cda3addf3b3a6248d", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "09e086a5f72ea27c758b3f3b419a69000c32adc1", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "1cece837e387c039225f19028df255df87a97c0d", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "24cf390a5426aac9255205e9533cdd7b4235d518", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "379a6a326514a3e2f71b674091dfb0e0e7522b55", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "ef23c18ab88e33ce000d06a5c6aad0620f219bfd", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "91b4850e7165a4b7180ef1e227733bcb41ccdf10", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "a9a18e8f770c9b0703dab93580d0b02e199a4c79", "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/atm/idt77252.c" ], "versions": [ { "version": "2.6.12", "status": "affected" }, { "version": "0", "lessThan": "2.6.12", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.321", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.283", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.225", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.166", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.107", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.48", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.10.7", "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": "2.6.12", "versionEndExcluding": "4.19.321" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "5.4.283" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "5.10.225" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "5.15.166" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.1.107" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.6.48" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.10.7" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.11" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/628ea82190a678a56d2ec38cda3addf3b3a6248d" }, { "url": "https://git.kernel.org/stable/c/09e086a5f72ea27c758b3f3b419a69000c32adc1" }, { "url": "https://git.kernel.org/stable/c/1cece837e387c039225f19028df255df87a97c0d" }, { "url": "https://git.kernel.org/stable/c/24cf390a5426aac9255205e9533cdd7b4235d518" }, { "url": "https://git.kernel.org/stable/c/379a6a326514a3e2f71b674091dfb0e0e7522b55" }, { "url": "https://git.kernel.org/stable/c/ef23c18ab88e33ce000d06a5c6aad0620f219bfd" }, { "url": "https://git.kernel.org/stable/c/91b4850e7165a4b7180ef1e227733bcb41ccdf10" }, { "url": "https://git.kernel.org/stable/c/a9a18e8f770c9b0703dab93580d0b02e199a4c79" } ], "title": "atm: idt77252: prevent use after free in dequeue_rx()", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2024-09-04T20:19:05.283493Z", "id": "CVE-2024-44998", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-04T20:19:17.632Z" } }, { "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": "2025-11-03T22:14:54.152Z" } } ] } }