{ "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-2024-39371", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2024-39371", "idYear": 2024, "status": "PUBLISHED", "publishedAt": "2024-06-25T14:22:42.919Z", "updatedAt": "2026-05-11T20:20:58.167Z", "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": "io_uring: check for non-NULL file pointer in io_file_can_poll()", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring: check for non-NULL file pointer in io_file_can_poll()\n\nIn earlier kernels, it was possible to trigger a NULL pointer\ndereference off the forced async preparation path, if no file had\nbeen assigned. The trace leading to that looks as follows:\n\nBUG: kernel NULL pointer dereference, address: 00000000000000b0\nPGD 0 P4D 0\nOops: 0000 [#1] PREEMPT SMP\nCPU: 67 PID: 1633 Comm: buf-ring-invali Not tainted 6.8.0-rc3+ #1\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS unknown 2/2/2022\nRIP: 0010:io_buffer_select+0xc3/0x210\nCode: 00 00 48 39 d1 0f 82 ae 00 00 00 48 81 4b 48 00 00 01 00 48 89 73 70 0f b7 50 0c 66 89 53 42 85 ed 0f 85 d2 00 00 00 48 8b 13 <48> 8b 92 b0 00 00 00 48 83 7a 40 00 0f 84 21 01 00 00 4c 8b 20 5b\nRSP: 0018:ffffb7bec38c7d88 EFLAGS: 00010246\nRAX: ffff97af2be61000 RBX: ffff97af234f1700 RCX: 0000000000000040\nRDX: 0000000000000000 RSI: ffff97aecfb04820 RDI: ffff97af234f1700\nRBP: 0000000000000000 R08: 0000000000200030 R09: 0000000000000020\nR10: ffffb7bec38c7dc8 R11: 000000000000c000 R12: ffffb7bec38c7db8\nR13: ffff97aecfb05800 R14: ffff97aecfb05800 R15: ffff97af2be5e000\nFS: 00007f852f74b740(0000) GS:ffff97b1eeec0000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00000000000000b0 CR3: 000000016deab005 CR4: 0000000000370ef0\nCall Trace:\n \n ? __die+0x1f/0x60\n ? page_fault_oops+0x14d/0x420\n ? do_user_addr_fault+0x61/0x6a0\n ? exc_page_fault+0x6c/0x150\n ? asm_exc_page_fault+0x22/0x30\n ? io_buffer_select+0xc3/0x210\n __io_import_iovec+0xb5/0x120\n io_readv_prep_async+0x36/0x70\n io_queue_sqe_fallback+0x20/0x260\n io_submit_sqes+0x314/0x630\n __do_sys_io_uring_enter+0x339/0xbc0\n ? __do_sys_io_uring_register+0x11b/0xc50\n ? vm_mmap_pgoff+0xce/0x160\n do_syscall_64+0x5f/0x180\n entry_SYSCALL_64_after_hwframe+0x46/0x4e\nRIP: 0033:0x55e0a110a67e\nCode: ba cc 00 00 00 45 31 c0 44 0f b6 92 d0 00 00 00 31 d2 41 b9 08 00 00 00 41 83 e2 01 41 c1 e2 04 41 09 c2 b8 aa 01 00 00 0f 05 90 89 30 eb a9 0f 1f 40 00 48 8b 42 20 8b 00 a8 06 75 af 85 f6\n\nbecause the request is marked forced ASYNC and has a bad file fd, and\nhence takes the forced async prep path.\n\nCurrent kernels with the request async prep cleaned up can no longer hit\nthis issue, but for ease of backporting, let's add this safety check in\nhere too as it really doesn't hurt. For both cases, this will inevitably\nend with a CQE posted with -EBADF.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "a76c0b31eef50fdb8b21d53a6d050f59241fb88e", "status": "affected", "versionType": "git", "lessThan": "c2844d5e58576c55d8e8d4a9f74902d3f7be8044" }, { "version": "a76c0b31eef50fdb8b21d53a6d050f59241fb88e", "status": "affected", "versionType": "git", "lessThan": "43cfac7b88adedfb26c27834386992650f1642f3" }, { "version": "a76c0b31eef50fdb8b21d53a6d050f59241fb88e", "status": "affected", "versionType": "git", "lessThan": "65561b4c1c9e01443cb76387eb36a9109e7048ee" }, { "version": "a76c0b31eef50fdb8b21d53a6d050f59241fb88e", "status": "affected", "versionType": "git", "lessThan": "5fc16fa5f13b3c06fdb959ef262050bd810416a2" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "5.19", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "5.19" }, { "version": "6.1.95", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.35", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.9.5", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.9.*" }, { "version": "6.10", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }