{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-56650", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-12-27T15:00:39.840Z", "datePublished": "2024-12-27T15:02:50.098Z", "dateUpdated": "2026-08-05T11:45:47.823Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:45:47.823Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: x_tables: fix LED ID check in led_tg_check()\n\nSyzbot has reported the following BUG detected by KASAN:\n\nBUG: KASAN: slab-out-of-bounds in strlen+0x58/0x70\nRead of size 1 at addr ffff8881022da0c8 by task repro/5879\n...\nCall Trace:\n \n dump_stack_lvl+0x241/0x360\n ? __pfx_dump_stack_lvl+0x10/0x10\n ? __pfx__printk+0x10/0x10\n ? _printk+0xd5/0x120\n ? __virt_addr_valid+0x183/0x530\n ? __virt_addr_valid+0x183/0x530\n print_report+0x169/0x550\n ? __virt_addr_valid+0x183/0x530\n ? __virt_addr_valid+0x183/0x530\n ? __virt_addr_valid+0x45f/0x530\n ? __phys_addr+0xba/0x170\n ? strlen+0x58/0x70\n kasan_report+0x143/0x180\n ? strlen+0x58/0x70\n strlen+0x58/0x70\n kstrdup+0x20/0x80\n led_tg_check+0x18b/0x3c0\n xt_check_target+0x3bb/0xa40\n ? __pfx_xt_check_target+0x10/0x10\n ? stack_depot_save_flags+0x6e4/0x830\n ? nft_target_init+0x174/0xc30\n nft_target_init+0x82d/0xc30\n ? __pfx_nft_target_init+0x10/0x10\n ? nf_tables_newrule+0x1609/0x2980\n ? nf_tables_newrule+0x1609/0x2980\n ? rcu_is_watching+0x15/0xb0\n ? nf_tables_newrule+0x1609/0x2980\n ? nf_tables_newrule+0x1609/0x2980\n ? __kmalloc_noprof+0x21a/0x400\n nf_tables_newrule+0x1860/0x2980\n ? __pfx_nf_tables_newrule+0x10/0x10\n ? __nla_parse+0x40/0x60\n nfnetlink_rcv+0x14e5/0x2ab0\n ? __pfx_validate_chain+0x10/0x10\n ? __pfx_nfnetlink_rcv+0x10/0x10\n ? __lock_acquire+0x1384/0x2050\n ? netlink_deliver_tap+0x2e/0x1b0\n ? __pfx_lock_release+0x10/0x10\n ? netlink_deliver_tap+0x2e/0x1b0\n netlink_unicast+0x7f8/0x990\n ? __pfx_netlink_unicast+0x10/0x10\n ? __virt_addr_valid+0x183/0x530\n ? __check_object_size+0x48e/0x900\n netlink_sendmsg+0x8e4/0xcb0\n ? __pfx_netlink_sendmsg+0x10/0x10\n ? aa_sock_msg_perm+0x91/0x160\n ? __pfx_netlink_sendmsg+0x10/0x10\n __sock_sendmsg+0x223/0x270\n ____sys_sendmsg+0x52a/0x7e0\n ? __pfx_____sys_sendmsg+0x10/0x10\n __sys_sendmsg+0x292/0x380\n ? __pfx___sys_sendmsg+0x10/0x10\n ? lockdep_hardirqs_on_prepare+0x43d/0x780\n ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10\n ? exc_page_fault+0x590/0x8c0\n ? do_syscall_64+0xb6/0x230\n do_syscall_64+0xf3/0x230\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n...\n \n\nSince an invalid (without '\\0' byte at all) byte sequence may be passed\nfrom userspace, add an extra check to ensure that such a sequence is\nrejected as possible ID and so never passed to 'kstrdup()' and further." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "baseScore": 7.1, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The vulnerable path is entered only through local syscalls — `sendmsg()` on a NETLINK_NETFILTER socket (nf_tables/nft_compat) or `setsockopt(IPT_SO_SET_REPLACE)` on the legacy iptables interface. No remote peer can supply the malformed `xt_led_info` blob.\nAC:L - The attacker fully controls all 40 bytes of the target info blob and simply omits any NUL byte, making `strlen()` read out of bounds deterministically on every attempt; there is no race, no memory-layout precondition, and the required xt_LED module is present in stock distro and embedded kernel configs.\nPR:L - `nf_tables_newrule` requires CAP_NET_ADMIN only in the network namespace's owning user namespace, which any unprivileged user obtains with `unshare -Urn` — exactly how the syzbot reproducer reached it.\nUI:N - The attacker performs the entire sequence — create netns, add an nftables rule with an xt LED target — with no action by any other user, and reads the leaked bytes back from sysfs itself.\nS:U - The out-of-bounds read stays within the kernel's own heap and the disclosed data is exposed through kernel-managed interfaces; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - This is an unbounded slab out-of-bounds read whose contents are not merely touched but `kstrdup()`'d into a globally registered LED trigger name, then printed into the world-readable (0644) `/sys/class/leds/*/trigger` file, plus an `-EEXIST` collision oracle from `led_trigger_register()` — giving an unprivileged user a practical adjacent-kernel-heap disclosure primitive that can leak pointers and defeat KASLR/heap-layout hardening.\nI:N - `kstrdup()` allocates exactly `strlen()+1` bytes and the sysfs printer clamps with `vscnprintf`, so no memory is written out of bounds and no kernel data structure is corrupted by the flaw.\nA:H - The `strlen()` walk continues until it happens to find a zero byte and can fault on a KFENCE guard page — enabled by default in production distro and Android kernels — or run past mapped memory, oopsing the kernel; on KASAN builds it panics outright, and the attacker can repeat the attempt arbitrarily." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/netfilter/xt_LED.c" ], "versions": [ { "version": "268cb38e1802db560c73167e643f14a3dcb4b07c", "lessThan": "147a42bb02de8735cb08476be6d0917987d022c2", "status": "affected", "versionType": "git" }, { "version": "268cb38e1802db560c73167e643f14a3dcb4b07c", "lessThan": "ad28612ebae1fcc1104bd432e99e99d87f6bfe09", "status": "affected", "versionType": "git" }, { "version": "268cb38e1802db560c73167e643f14a3dcb4b07c", "lessThan": "36a9d94dac28beef6b8abba46ba8874320d3e800", "status": "affected", "versionType": "git" }, { "version": "268cb38e1802db560c73167e643f14a3dcb4b07c", "lessThan": "ab9916321c95f5280b72b4c5055e269f98627efe", "status": "affected", "versionType": "git" }, { "version": "268cb38e1802db560c73167e643f14a3dcb4b07c", "lessThan": "a9bcc0b70d9baf3ff005874489a0dc9d023b54c3", "status": "affected", "versionType": "git" }, { "version": "268cb38e1802db560c73167e643f14a3dcb4b07c", "lessThan": "c40c96d98e536fc1daaa125c2332b988615e30a4", "status": "affected", "versionType": "git" }, { "version": "268cb38e1802db560c73167e643f14a3dcb4b07c", "lessThan": "04317f4eb2aad312ad85c1a17ad81fe75f1f9bc7", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/netfilter/xt_LED.c" ], "versions": [ { "version": "2.6.30", "status": "affected" }, { "version": "0", "lessThan": "2.6.30", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.287", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.231", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.174", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.120", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.66", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.5", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.13", "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": "2.6.30", "versionEndExcluding": "5.4.287" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "5.10.231" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "5.15.174" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "6.1.120" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "6.6.66" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "6.12.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "6.13" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/147a42bb02de8735cb08476be6d0917987d022c2" }, { "url": "https://git.kernel.org/stable/c/ad28612ebae1fcc1104bd432e99e99d87f6bfe09" }, { "url": "https://git.kernel.org/stable/c/36a9d94dac28beef6b8abba46ba8874320d3e800" }, { "url": "https://git.kernel.org/stable/c/ab9916321c95f5280b72b4c5055e269f98627efe" }, { "url": "https://git.kernel.org/stable/c/a9bcc0b70d9baf3ff005874489a0dc9d023b54c3" }, { "url": "https://git.kernel.org/stable/c/c40c96d98e536fc1daaa125c2332b988615e30a4" }, { "url": "https://git.kernel.org/stable/c/04317f4eb2aad312ad85c1a17ad81fe75f1f9bc7" } ], "title": "netfilter: x_tables: fix LED ID check in led_tg_check()", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 7.1, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH" } }, { "other": { "type": "ssvc", "content": { "id": "CVE-2024-56650", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2025-10-01T20:00:22.683789Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "cweId": "CWE-125", "description": "CWE-125 Out-of-bounds Read" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-10-01T20:07:11.150Z" } }, { "title": "CVE Program Container", "references": [ { "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html" }, { "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html" } ], "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T20:51:56.813Z" } } ] } }