{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2025-40012", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T07:20:57.151Z", "datePublished": "2025-10-20T15:26:57.214Z", "dateUpdated": "2025-10-20T15:26:57.214Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-10-20T15:26:57.214Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: fix warning in smc_rx_splice() when calling get_page()\n\nsmc_lo_register_dmb() allocates DMB buffers with kzalloc(), which are\nlater passed to get_page() in smc_rx_splice(). Since kmalloc memory is\nnot page-backed, this triggers WARN_ON_ONCE() in get_page() and prevents\nholding a refcount on the buffer. This can lead to use-after-free if\nthe memory is released before splice_to_pipe() completes.\n\nUse folio_alloc() instead, ensuring DMBs are page-backed and safe for\nget_page().\n\nWARNING: CPU: 18 PID: 12152 at ./include/linux/mm.h:1330 smc_rx_splice+0xaf8/0xe20 [smc]\nCPU: 18 UID: 0 PID: 12152 Comm: smcapp Kdump: loaded Not tainted 6.17.0-rc3-11705-g9cf4672ecfee #10 NONE\nHardware name: IBM 3931 A01 704 (z/VM 7.4.0)\nKrnl PSW : 0704e00180000000 000793161032696c (smc_rx_splice+0xafc/0xe20 [smc])\n R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:2 PM:0 RI:0 EA:3\nKrnl GPRS: 0000000000000000 001cee80007d3001 00077400000000f8 0000000000000005\n 0000000000000001 001cee80007d3006 0007740000001000 001c000000000000\n 000000009b0c99e0 0000000000001000 001c0000000000f8 001c000000000000\n 000003ffcc6f7c88 0007740003e98000 0007931600000005 000792969b2ff7b8\nKrnl Code: 0007931610326960: af000000\t\tmc\t0,0\n 0007931610326964: a7f4ff43\t\tbrc\t15,00079316103267ea\n #0007931610326968: af000000\t\tmc\t0,0\n >000793161032696c: a7f4ff3f\t\tbrc\t15,00079316103267ea\n 0007931610326970: e320f1000004\tlg\t%r2,256(%r15)\n 0007931610326976: c0e53fd1b5f5\tbrasl\t%r14,000793168fd5d560\n 000793161032697c: a7f4fbb5\t\tbrc\t15,00079316103260e6\n 0007931610326980: b904002b\t\tlgr\t%r2,%r11\nCall Trace:\n smc_rx_splice+0xafc/0xe20 [smc]\n smc_rx_splice+0x756/0xe20 [smc])\n smc_rx_recvmsg+0xa74/0xe00 [smc]\n smc_splice_read+0x1ce/0x3b0 [smc]\n sock_splice_read+0xa2/0xf0\n do_splice_read+0x198/0x240\n splice_file_to_pipe+0x7e/0x110\n do_splice+0x59e/0xde0\n __do_splice+0x11a/0x2d0\n __s390x_sys_splice+0x140/0x1f0\n __do_syscall+0x122/0x280\n system_call+0x6e/0x90\nLast Breaking-Event-Address:\nsmc_rx_splice+0x960/0xe20 [smc]\n---[ end trace 0000000000000000 ]---"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/smc/smc_loopback.c"], "versions": [{"version": "f7a22071dbf316c982fb44308874bd7ad9ac2091", "lessThan": "14fc4fdae42e34d7ee871b292ac2ecc61c2c5de7", "status": "affected", "versionType": "git"}, {"version": "f7a22071dbf316c982fb44308874bd7ad9ac2091", "lessThan": "d5411685dc2f6ac7bdf01a0a204d56cae38c6cf6", "status": "affected", "versionType": "git"}, {"version": "f7a22071dbf316c982fb44308874bd7ad9ac2091", "lessThan": "a35c04de2565db191726b5741e6b66a35002c652", "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/smc/smc_loopback.c"], "versions": [{"version": "6.10", "status": "affected"}, {"version": "0", "lessThan": "6.10", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.50", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.16.10", "lessThanOrEqual": "6.16.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.17", "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": "6.10", "versionEndExcluding": "6.12.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10", "versionEndExcluding": "6.16.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10", "versionEndExcluding": "6.17"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/14fc4fdae42e34d7ee871b292ac2ecc61c2c5de7"}, {"url": "https://git.kernel.org/stable/c/d5411685dc2f6ac7bdf01a0a204d56cae38c6cf6"}, {"url": "https://git.kernel.org/stable/c/a35c04de2565db191726b5741e6b66a35002c652"}], "title": "net/smc: fix warning in smc_rx_splice() when calling get_page()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: fix warning in smc_rx_splice() when calling get_page()\n\nsmc_lo_register_dmb() allocates DMB buffers with kzalloc(), which are\nlater passed to get_page() in smc_rx_splice(). Since kmalloc memory is\nnot page-backed, this triggers WARN_ON_ONCE() in get_page() and prevents\nholding a refcount on the buffer. This can lead to use-after-free if\nthe memory is released before splice_to_pipe() completes.\n\nUse folio_alloc() instead, ensuring DMBs are page-backed and safe for\nget_page().\n\nWARNING: CPU: 18 PID: 12152 at ./include/linux/mm.h:1330 smc_rx_splice+0xaf8/0xe20 [smc]\nCPU: 18 UID: 0 PID: 12152 Comm: smcapp Kdump: loaded Not tainted 6.17.0-rc3-11705-g9cf4672ecfee #10 NONE\nHardware name: IBM 3931 A01 704 (z/VM 7.4.0)\nKrnl PSW : 0704e00180000000 000793161032696c (smc_rx_splice+0xafc/0xe20 [smc])\n R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:2 PM:0 RI:0 EA:3\nKrnl GPRS: 0000000000000000 001cee80007d3001 00077400000000f8 0000000000000005\n 0000000000000001 001cee80007d3006 0007740000001000 001c000000000000\n 000000009b0c99e0 0000000000001000 001c0000000000f8 001c000000000000\n 000003ffcc6f7c88 0007740003e98000 0007931600000005 000792969b2ff7b8\nKrnl Code: 0007931610326960: af000000\t\tmc\t0,0\n 0007931610326964: a7f4ff43\t\tbrc\t15,00079316103267ea\n #0007931610326968: af000000\t\tmc\t0,0\n >000793161032696c: a7f4ff3f\t\tbrc\t15,00079316103267ea\n 0007931610326970: e320f1000004\tlg\t%r2,256(%r15)\n 0007931610326976: c0e53fd1b5f5\tbrasl\t%r14,000793168fd5d560\n 000793161032697c: a7f4fbb5\t\tbrc\t15,00079316103260e6\n 0007931610326980: b904002b\t\tlgr\t%r2,%r11\nCall Trace:\n smc_rx_splice+0xafc/0xe20 [smc]\n smc_rx_splice+0x756/0xe20 [smc])\n smc_rx_recvmsg+0xa74/0xe00 [smc]\n smc_splice_read+0x1ce/0x3b0 [smc]\n sock_splice_read+0xa2/0xf0\n do_splice_read+0x198/0x240\n splice_file_to_pipe+0x7e/0x110\n do_splice+0x59e/0xde0\n __do_splice+0x11a/0x2d0\n __s390x_sys_splice+0x140/0x1f0\n __do_syscall+0x122/0x280\n system_call+0x6e/0x90\nLast Breaking-Event-Address:\nsmc_rx_splice+0x960/0xe20 [smc]\n---[ end trace 0000000000000000 ]---"}], "id": "CVE-2025-40012", "lastModified": "2025-10-21T19:31:25.450", "metrics": {}, "published": "2025-10-20T16:15:37.937", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/14fc4fdae42e34d7ee871b292ac2ecc61c2c5de7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a35c04de2565db191726b5741e6b66a35002c652"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d5411685dc2f6ac7bdf01a0a204d56cae38c6cf6"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: net/smc: fix warning in smc_rx_splice() when calling get_page()", "id": "2405117", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2405117"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["No description is available for this CVE."], "name": "CVE-2025-40012", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-10-20T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-40012\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-40012\nhttps://lore.kernel.org/linux-cve-announce/2025102003-CVE-2025-40012-86b3@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-10-21T09:39:52.576932+00:00", "updated": "2025-10-21T09:39:52.576965+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}