{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2023-53198", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2023-53198", "idYear": 2023, "status": "PUBLISHED", "publishedAt": "2025-09-15T14:06:47.761Z", "updatedAt": "2026-05-23T15:28:13.609Z", "importedAt": "2026-10-24T01:57:03.413Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "raw: Fix NULL deref in raw_get_next().", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nraw: Fix NULL deref in raw_get_next().\n\nDae R. Jeong reported a NULL deref in raw_get_next() [0].\n\nIt seems that the repro was running these sequences in parallel so\nthat one thread was iterating on a socket that was being freed in\nanother netns.\n\n unshare(0x40060200)\n r0 = syz_open_procfs(0x0, &(0x7f0000002080)='net/raw\\x00')\n socket$inet_icmp_raw(0x2, 0x3, 0x1)\n pread64(r0, &(0x7f0000000000)=\"\"/10, 0xa, 0x10000000007f)\n\nAfter commit 0daf07e52709 (\"raw: convert raw sockets to RCU\"), we\nuse RCU and hlist_nulls_for_each_entry() to iterate over SOCK_RAW\nsockets. However, we should use spinlock for slow paths to avoid\nthe NULL deref.\n\nAlso, SOCK_RAW does not use SLAB_TYPESAFE_BY_RCU, and the slab object\nis not reused during iteration in the grace period. In fact, the\nlockless readers do not check the nulls marker with get_nulls_value().\nSo, SOCK_RAW should use hlist instead of hlist_nulls.\n\nInstead of adding an unnecessary barrier by sk_nulls_for_each_rcu(),\nlet's convert hlist_nulls to hlist and use sk_for_each_rcu() for\nfast paths and sk_for_each() and spinlock for /proc/net/raw.\n\n[0]:\ngeneral protection fault, probably for non-canonical address 0xdffffc0000000005: 0000 [#1] PREEMPT SMP KASAN\nKASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f]\nCPU: 2 PID: 20952 Comm: syz-executor.0 Not tainted 6.2.0-g048ec869bafd-dirty #7\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014\nRIP: 0010:read_pnet include/net/net_namespace.h:383 [inline]\nRIP: 0010:sock_net include/net/sock.h:649 [inline]\nRIP: 0010:raw_get_next net/ipv4/raw.c:974 [inline]\nRIP: 0010:raw_get_idx net/ipv4/raw.c:986 [inline]\nRIP: 0010:raw_seq_start+0x431/0x800 net/ipv4/raw.c:995\nCode: ef e8 33 3d 94 f7 49 8b 6d 00 4c 89 ef e8 b7 65 5f f7 49 89 ed 49 83 c5 98 0f 84 9a 00 00 00 48 83 c5 c8 48 89 e8 48 c1 e8 03 <42> 80 3c 30 00 74 08 48 89 ef e8 00 3d 94 f7 4c 8b 7d 00 48 89 ef\nRSP: 0018:ffffc9001154f9b0 EFLAGS: 00010206\nRAX: 0000000000000005 RBX: 1ffff1100302c8fd RCX: 0000000000000000\nRDX: 0000000000000028 RSI: ffffc9001154f988 RDI: ffffc9000f77a338\nRBP: 0000000000000029 R08: ffffffff8a50ffb4 R09: fffffbfff24b6bd9\nR10: fffffbfff24b6bd9 R11: 0000000000000000 R12: ffff88801db73b78\nR13: fffffffffffffff9 R14: dffffc0000000000 R15: 0000000000000030\nFS: 00007f843ae8e700(0000) GS:ffff888063700000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 000055bb9614b35f CR3: 000000003c672000 CR4: 00000000003506e0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n \n seq_read_iter+0x4c6/0x10f0 fs/seq_file.c:225\n seq_read+0x224/0x320 fs/seq_file.c:162\n pde_read fs/proc/inode.c:316 [inline]\n proc_reg_read+0x23f/0x330 fs/proc/inode.c:328\n vfs_read+0x31e/0xd30 fs/read_write.c:468\n ksys_pread64 fs/read_write.c:665 [inline]\n __do_sys_pread64 fs/read_write.c:675 [inline]\n __se_sys_pread64 fs/read_write.c:672 [inline]\n __x64_sys_pread64+0x1e9/0x280 fs/read_write.c:672\n do_syscall_x64 arch/x86/entry/common.c:51 [inline]\n do_syscall_64+0x4e/0xa0 arch/x86/entry/common.c:82\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\nRIP: 0033:0x478d29\nCode: f7 d8 64 89 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48\nRSP: 002b:00007f843ae8dbe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000011\nRAX: ffffffffffffffda RBX: 0000000000791408 RCX: 0000000000478d29\nRDX: 000000000000000a RSI: 0000000020000000 RDI: 0000000000000003\nRBP: 00000000f477909a R08: 0000000000000000 R09: 0000000000000000\nR10: 000010000000007f R11: 0000000000000246 R12: 0000000000791740\nR13: 0000000000791414 R14: 0000000000791408 R15: 00007ffc2eb48a50\n \nModules linked in:\n---[ end trace 0000000000000000 ]---\nRIP: 0010\n---truncated---", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "0daf07e527095e64ee8927ce297ab626643e9f51", "status": "affected", "versionType": "git", "lessThan": "b34056bedf04d08ef24f713a7f93bad1274a838d" }, { "version": "0daf07e527095e64ee8927ce297ab626643e9f51", "status": "affected", "versionType": "git", "lessThan": "67daeaecd70ef20ab540c21739d3f633734967a1" }, { "version": "0daf07e527095e64ee8927ce297ab626643e9f51", "status": "affected", "versionType": "git", "lessThan": "0a78cf7264d29abeca098eae0b188a10aabc8a32" }, { "version": "648067dd541591a0ddaa31afaaf4a7655d33c0d8", "status": "affected", "versionType": "git" }, { "version": "04309b5f5d8dd77996b19ae6be8f42f9fc1679a0", "status": "affected", "versionType": "git" }, { "version": "5.18.18", "status": "affected", "versionType": "semver", "lessThan": "5.19" }, { "version": "5.19.2", "status": "affected", "versionType": "semver", "lessThan": "5.20" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "6.0", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "6.0" }, { "version": "6.1.24", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.2.11", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.2.*" }, { "version": "6.3", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }