{ "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-2024-47684", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2024-47684", "idYear": 2024, "status": "PUBLISHED", "publishedAt": "2024-10-21T11:53:25.787Z", "updatedAt": "2026-10-15T00:51:12.984Z", "importedAt": "2026-10-24T01:57:16.009Z", "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": "tcp: check skb is non-NULL in tcp_rto_delta_us()", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\ntcp: check skb is non-NULL in tcp_rto_delta_us()\n\nWe have some machines running stock Ubuntu 20.04.6 which is their 5.4.0-174-generic\nkernel that are running ceph and recently hit a null ptr dereference in\ntcp_rearm_rto(). Initially hitting it from the TLP path, but then later we also\nsaw it getting hit from the RACK case as well. Here are examples of the oops\nmessages we saw in each of those cases:\n\nJul 26 15:05:02 rx [11061395.780353] BUG: kernel NULL pointer dereference, address: 0000000000000020\nJul 26 15:05:02 rx [11061395.787572] #PF: supervisor read access in kernel mode\nJul 26 15:05:02 rx [11061395.792971] #PF: error_code(0x0000) - not-present page\nJul 26 15:05:02 rx [11061395.798362] PGD 0 P4D 0\nJul 26 15:05:02 rx [11061395.801164] Oops: 0000 [#1] SMP NOPTI\nJul 26 15:05:02 rx [11061395.805091] CPU: 0 PID: 9180 Comm: msgr-worker-1 Tainted: G W 5.4.0-174-generic #193-Ubuntu\nJul 26 15:05:02 rx [11061395.814996] Hardware name: Supermicro SMC 2x26 os-gen8 64C NVME-Y 256G/H12SSW-NTR, BIOS 2.5.V1.2U.NVMe.UEFI 05/09/2023\nJul 26 15:05:02 rx [11061395.825952] RIP: 0010:tcp_rearm_rto+0xe4/0x160\nJul 26 15:05:02 rx [11061395.830656] Code: 87 ca 04 00 00 00 5b 41 5c 41 5d 5d c3 c3 49 8b bc 24 40 06 00 00 eb 8d 48 bb cf f7 53 e3 a5 9b c4 20 4c 89 ef e8 0c fe 0e 00 <48> 8b 78 20 48 c1 ef 03 48 89 f8 41 8b bc 24 80 04 00 00 48 f7 e3\nJul 26 15:05:02 rx [11061395.849665] RSP: 0018:ffffb75d40003e08 EFLAGS: 00010246\nJul 26 15:05:02 rx [11061395.855149] RAX: 0000000000000000 RBX: 20c49ba5e353f7cf RCX: 0000000000000000\nJul 26 15:05:02 rx [11061395.862542] RDX: 0000000062177c30 RSI: 000000000000231c RDI: ffff9874ad283a60\nJul 26 15:05:02 rx [11061395.869933] RBP: ffffb75d40003e20 R08: 0000000000000000 R09: ffff987605e20aa8\nJul 26 15:05:02 rx [11061395.877318] R10: ffffb75d40003f00 R11: ffffb75d4460f740 R12: ffff9874ad283900\nJul 26 15:05:02 rx [11061395.884710] R13: ffff9874ad283a60 R14: ffff9874ad283980 R15: ffff9874ad283d30\nJul 26 15:05:02 rx [11061395.892095] FS: 00007f1ef4a2e700(0000) GS:ffff987605e00000(0000) knlGS:0000000000000000\nJul 26 15:05:02 rx [11061395.900438] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nJul 26 15:05:02 rx [11061395.906435] CR2: 0000000000000020 CR3: 0000003e450ba003 CR4: 0000000000760ef0\nJul 26 15:05:02 rx [11061395.913822] PKRU: 55555554\nJul 26 15:05:02 rx [11061395.916786] Call Trace:\nJul 26 15:05:02 rx [11061395.919488]\nJul 26 15:05:02 rx [11061395.921765] ? show_regs.cold+0x1a/0x1f\nJul 26 15:05:02 rx [11061395.925859] ? __die+0x90/0xd9\nJul 26 15:05:02 rx [11061395.929169] ? no_context+0x196/0x380\nJul 26 15:05:02 rx [11061395.933088] ? ip6_protocol_deliver_rcu+0x4e0/0x4e0\nJul 26 15:05:02 rx [11061395.938216] ? ip6_sublist_rcv_finish+0x3d/0x50\nJul 26 15:05:02 rx [11061395.943000] ? __bad_area_nosemaphore+0x50/0x1a0\nJul 26 15:05:02 rx [11061395.947873] ? bad_area_nosemaphore+0x16/0x20\nJul 26 15:05:02 rx [11061395.952486] ? do_user_addr_fault+0x267/0x450\nJul 26 15:05:02 rx [11061395.957104] ? ipv6_list_rcv+0x112/0x140\nJul 26 15:05:02 rx [11061395.961279] ? __do_page_fault+0x58/0x90\nJul 26 15:05:02 rx [11061395.965458] ? do_page_fault+0x2c/0xe0\nJul 26 15:05:02 rx [11061395.969465] ? page_fault+0x34/0x40\nJul 26 15:05:02 rx [11061395.973217] ? tcp_rearm_rto+0xe4/0x160\nJul 26 15:05:02 rx [11061395.977313] ? tcp_rearm_rto+0xe4/0x160\nJul 26 15:05:02 rx [11061395.981408] tcp_send_loss_probe+0x10b/0x220\nJul 26 15:05:02 rx [11061395.985937] tcp_write_timer_handler+0x1b4/0x240\nJul 26 15:05:02 rx [11061395.990809] tcp_write_timer+0x9e/0xe0\nJul 26 15:05:02 rx [11061395.994814] ? tcp_write_timer_handler+0x240/0x240\nJul 26 15:05:02 rx [11061395.999866] call_timer_fn+0x32/0x130\nJul 26 15:05:02 rx [11061396.003782] __run_timers.part.0+0x180/0x280\nJul 26 15:05:02 rx [11061396.008309] ? recalibrate_cpu_khz+0x10/0x10\nJul 26 15:05:02 rx [11061396.012841] ? native_x2apic_icr_write+0x30/0x30\nJul 26 15:05:02 rx [11061396.017718] ? lapic_next_even\n---truncated---", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "e1a10ef7fa876f8510aaec36ea5c0cf34baba410", "status": "affected", "versionType": "git", "lessThan": "ad4f0a14d6856e68f023fc4e5017cfd881a3dfbc" }, { "version": "e1a10ef7fa876f8510aaec36ea5c0cf34baba410", "status": "affected", "versionType": "git", "lessThan": "16e0387d87fc858e34449fdf2b14ed5837f761db" }, { "version": "e1a10ef7fa876f8510aaec36ea5c0cf34baba410", "status": "affected", "versionType": "git", "lessThan": "ec31cf42fc4e35bb1248ce6eb1de6de9f851ac86" }, { "version": "e1a10ef7fa876f8510aaec36ea5c0cf34baba410", "status": "affected", "versionType": "git", "lessThan": "5c4c03288a4aea705e36aa44119c13d7ee4dce99" }, { "version": "e1a10ef7fa876f8510aaec36ea5c0cf34baba410", "status": "affected", "versionType": "git", "lessThan": "96c4983eab2a5da235f7fff90beaf17b008ba029" }, { "version": "e1a10ef7fa876f8510aaec36ea5c0cf34baba410", "status": "affected", "versionType": "git", "lessThan": "570f7d8c9bf14f041152ba8353d4330ef7575915" }, { "version": "e1a10ef7fa876f8510aaec36ea5c0cf34baba410", "status": "affected", "versionType": "git", "lessThan": "81d18c152e3f82bacadf83bc0a471b2363b9cc18" }, { "version": "e1a10ef7fa876f8510aaec36ea5c0cf34baba410", "status": "affected", "versionType": "git", "lessThan": "09aea49fbc7e755a915c405644f347137cdb62b0" }, { "version": "e1a10ef7fa876f8510aaec36ea5c0cf34baba410", "status": "affected", "versionType": "git", "lessThan": "c8770db2d54437a5f49417ae7b46f7de23d14db6" }, { "version": "42a858e036bb26cb559157393b7890cabe70bfc2", "status": "affected", "versionType": "git" }, { "version": "3.10.108", "status": "affected", "versionType": "semver", "lessThan": "3.11" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "4.13", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "4.13" }, { "version": "4.19.323", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.19.*" }, { "version": "5.4.285", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.4.*" }, { "version": "5.10.227", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.168", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.113", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.54", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.10.13", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.10.*" }, { "version": "6.11.2", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.11.*" }, { "version": "6.12", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }