{ "dataType": "CVE_RECORD", "cveMetadata": { "cveId": "CVE-2023-52880", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-05-21T15:35:00.781Z", "datePublished": "2024-05-24T15:33:17.439Z", "dateUpdated": "2026-08-05T09:11:49.513Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T09:11:49.513Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntty: n_gsm: require CAP_NET_ADMIN to attach N_GSM0710 ldisc\n\nAny unprivileged user can attach N_GSM0710 ldisc, but it requires\nCAP_NET_ADMIN to create a GSM network anyway.\n\nRequire initial namespace CAP_NET_ADMIN to do that." } ], "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 - Exploitation is entirely local: an attacker opens a pty (/dev/ptmx), issues ioctl(TIOCSETD, N_GSM0710) → tiocsetd → tty_set_ldisc → gsmld_open, then drives GSMIOC_SETCONF and frame I/O on that tty. There is no network-facing or adjacent-link path into this code.\nAC:L - Attaching the ldisc and configuring the mux is fully attacker-controlled and deterministic on a self-owned pty, with no race or other condition outside the attacker’s influence.\nPR:L - Before the fix, gsmld_open had no capability check, so any unprivileged local user with a pty could attach N_GSM0710; CAP_NET_ADMIN was only required later for GSMIOC_ENABLE_NET, not for attach/configure.\nUI:N - The attacker performs openpty, TIOCSETD, GSMIOC_SETCONF, and subsequent I/O entirely in their own process; no victim action is required.\nS:U - Impact remains within the host kernel’s security authority as a local privilege-escalation/DoS boundary; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - Unprivileged attach exposes the full n_gsm mux/parser heap paths; throughout this CVE’s lifetime the same entry path enabled serious memory-corruption bugs (e.g. CVE-2024-36016 heap OOB readable via DLCI/tty paths, timer/cleanup UAFs), yielding kernel disclosure primitives.\nI:H - The same exposed attach/configure/cleanup surface enables heap overflow and use-after-free write primitives against adjacent slab objects and gsm_mux control state, supporting arbitrary write and control-flow hijack.\nA:H - Abusing the unprivileged mux attach/teardown and parser paths reliably corrupts kernel state and triggers oops/panic (as seen in related n_gsm KASAN/oops reports), fully denying host availability." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/tty/n_gsm.c" ], "versions": [ { "version": "e1eaea46bb4020b38a141b84f88565d4603f8dd0", "lessThan": "7d303dee473ba3529d75b63491e9963342107bed", "status": "affected", "versionType": "git" }, { "version": "e1eaea46bb4020b38a141b84f88565d4603f8dd0", "lessThan": "7a529c9023a197ab3bf09bb95df32a3813f7ba58", "status": "affected", "versionType": "git" }, { "version": "e1eaea46bb4020b38a141b84f88565d4603f8dd0", "lessThan": "ada28eb4b9561aab93942f3224a2e41d76fe57fa", "status": "affected", "versionType": "git" }, { "version": "e1eaea46bb4020b38a141b84f88565d4603f8dd0", "lessThan": "2d154a54c58f9c8375bfbea9f7e51ba3bfb2e43a", "status": "affected", "versionType": "git" }, { "version": "e1eaea46bb4020b38a141b84f88565d4603f8dd0", "lessThan": "2b85977977cbd120591b23c2450e90a5806a7167", "status": "affected", "versionType": "git" }, { "version": "e1eaea46bb4020b38a141b84f88565d4603f8dd0", "lessThan": "67c37756898a5a6b2941a13ae7260c89b54e0d88", "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/tty/n_gsm.c" ], "versions": [ { "version": "2.6.35", "status": "affected" }, { "version": "0", "lessThan": "2.6.35", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.312", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.274", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.215", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.155", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.86", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6", "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": "2.6.35", "versionEndExcluding": "4.19.312" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.35", "versionEndExcluding": "5.4.274" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.35", "versionEndExcluding": "5.10.215" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.35", "versionEndExcluding": "5.15.155" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.35", "versionEndExcluding": "6.1.86" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.35", "versionEndExcluding": "6.6" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/7d303dee473ba3529d75b63491e9963342107bed" }, { "url": "https://git.kernel.org/stable/c/7a529c9023a197ab3bf09bb95df32a3813f7ba58" }, { "url": "https://git.kernel.org/stable/c/ada28eb4b9561aab93942f3224a2e41d76fe57fa" }, { "url": "https://git.kernel.org/stable/c/2d154a54c58f9c8375bfbea9f7e51ba3bfb2e43a" }, { "url": "https://git.kernel.org/stable/c/2b85977977cbd120591b23c2450e90a5806a7167" }, { "url": "https://git.kernel.org/stable/c/67c37756898a5a6b2941a13ae7260c89b54e0d88" } ], "title": "tty: n_gsm: require CAP_NET_ADMIN to attach N_GSM0710 ldisc", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "title": "CISA ADP Vulnrichment", "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2023-52880", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-05-24T19:10:27.057428Z" } } } ], "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-06-04T17:23:31.686Z" } }, { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T23:18:41.167Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/7d303dee473ba3529d75b63491e9963342107bed", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/7a529c9023a197ab3bf09bb95df32a3813f7ba58", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/ada28eb4b9561aab93942f3224a2e41d76fe57fa", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/2d154a54c58f9c8375bfbea9f7e51ba3bfb2e43a", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/2b85977977cbd120591b23c2450e90a5806a7167", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/67c37756898a5a6b2941a13ae7260c89b54e0d88", "tags": [ "x_transferred" ] }, { "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html", "tags": [ "x_transferred" ] }, { "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html", "tags": [ "x_transferred" ] } ] } ] }, "dataVersion": "5.2" }