{ "document":{ "aggregate_severity":{ "namespace":"https://nvd.nist.gov/vuln-metrics/cvss", "text":"MEDIUM" }, "category":"csaf_vex", "csaf_version":"2.0", "distribution":{ "tlp":{ "label":"WHITE", "url":"https:/www.first.org/tlp/" } }, "lang":"en", "notes":[ { "text":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix potential deadlock when reconnecting channels\n\nFix cifs_signal_cifsd_for_reconnect() to take the correct lock order\nand prevent the following deadlock from happening\n\n======================================================\nWARNING: possible circular locking dependency detected\n6.16.0-rc3-build2+ #1301 Tainted: G S W\n------------------------------------------------------\ncifsd/6055 is trying to acquire lock:\nffff88810ad56038 (&tcp_ses->srv_lock){+.+.}-{3:3}, at: cifs_signal_cifsd_for_reconnect+0x134/0x200\n\nbut task is already holding lock:\nffff888119c64330 (&ret_buf->chan_lock){+.+.}-{3:3}, at: cifs_signal_cifsd_for_reconnect+0xcf/0x200\n\nwhich lock already depends on the new lock.\n\nthe existing dependency chain (in reverse order) is:\n\n-> #2 (&ret_buf->chan_lock){+.+.}-{3:3}:\n validate_chain+0x1cf/0x270\n __lock_acquire+0x60e/0x780\n lock_acquire.part.0+0xb4/0x1f0\n _raw_spin_lock+0x2f/0x40\n cifs_setup_session+0x81/0x4b0\n cifs_get_smb_ses+0x771/0x900\n cifs_mount_get_session+0x7e/0x170\n cifs_mount+0x92/0x2d0\n cifs_smb3_do_mount+0x161/0x460\n smb3_get_tree+0x55/0x90\n vfs_get_tree+0x46/0x180\n do_new_mount+0x1b0/0x2e0\n path_mount+0x6ee/0x740\n do_mount+0x98/0xe0\n __do_sys_mount+0x148/0x180\n do_syscall_64+0xa4/0x260\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\n-> #1 (&ret_buf->ses_lock){+.+.}-{3:3}:\n validate_chain+0x1cf/0x270\n __lock_acquire+0x60e/0x780\n lock_acquire.part.0+0xb4/0x1f0\n _raw_spin_lock+0x2f/0x40\n cifs_match_super+0x101/0x320\n sget+0xab/0x270\n cifs_smb3_do_mount+0x1e0/0x460\n smb3_get_tree+0x55/0x90\n vfs_get_tree+0x46/0x180\n do_new_mount+0x1b0/0x2e0\n path_mount+0x6ee/0x740\n do_mount+0x98/0xe0\n __do_sys_mount+0x148/0x180\n do_syscall_64+0xa4/0x260\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\n-> #0 (&tcp_ses->srv_lock){+.+.}-{3:3}:\n check_noncircular+0x95/0xc0\n check_prev_add+0x115/0x2f0\n validate_chain+0x1cf/0x270\n __lock_acquire+0x60e/0x780\n lock_acquire.part.0+0xb4/0x1f0\n _raw_spin_lock+0x2f/0x40\n cifs_signal_cifsd_for_reconnect+0x134/0x200\n __cifs_reconnect+0x8f/0x500\n cifs_handle_standard+0x112/0x280\n cifs_demultiplex_thread+0x64d/0xbc0\n kthread+0x2f7/0x310\n ret_from_fork+0x2a/0x230\n ret_from_fork_asm+0x1a/0x30\n\nother info that might help us debug this:\n\nChain exists of:\n &tcp_ses->srv_lock --> &ret_buf->ses_lock --> &ret_buf->chan_lock\n\n Possible unsafe locking scenario:\n\n CPU0 CPU1\n ---- ----\n lock(&ret_buf->chan_lock);\n lock(&ret_buf->ses_lock);\n lock(&ret_buf->chan_lock);\n lock(&tcp_ses->srv_lock);\n\n *** DEADLOCK ***\n\n3 locks held by cifsd/6055:\n #0: ffffffff857de398 (&cifs_tcp_ses_lock){+.+.}-{3:3}, at: cifs_signal_cifsd_for_reconnect+0x7b/0x200\n #1: ffff888119c64060 (&ret_buf->ses_lock){+.+.}-{3:3}, at: cifs_signal_cifsd_for_reconnect+0x9c/0x200\n #2: ffff888119c64330 (&ret_buf->chan_lock){+.+.}-{3:3}, at: cifs_signal_cifsd_for_reconnect+0xcf/0x200", "category":"general", "title":"Synopsis" } ], "publisher":null, "references":[ { "summary":"nvd cve", "category":"external", "url":"https://nvd.nist.gov/vuln/detail/CVE-2025-38244" }, { "summary":"CVE-2025-38244 vex file", "category":"self", "url":"https://repo.openeuler.org/security/data/csaf/cve/2025/csaf-openeuler-cve-2025-38244.json" }, { "summary":"openEuler-SA-2026-1305", "category":"self", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-1305" }, { "summary":"CVE-2025-38244", "category":"self", "url":"https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2025-38244&packageName=kernel" } ], "title":"openEuler cve CVE-2025-38244", "tracking":{ "initial_release_date":"2026-02-10T14:53:10+08:00", "revision_history":[ { "date":"2026-02-10T14:53:10+08:00", "summary":"Initial", "number":"1.0.0" } ], "generator":{ "date":"2026-02-10T14:53:10+08:00", "engine":{ "name":"openEuler CSAF Tool V1.0" } }, "current_release_date":"2026-02-10T14:53:10+08:00", "id":"CVE-2025-38244", "version":"1.0.0", "status":"interim" } }, "product_tree":{ "branches":[ { "name":"openEuler", "category":"vendor", "branches":[ { "name":"openEuler", "branches":[ { "product":{ "product_identification_helper":{ "cpe":"cpe:/a:openEuler:openEuler:24.03-LTS-SP2" }, "product_id":"openEuler-24.03-LTS-SP2", "name":"openEuler-24.03-LTS-SP2" }, "name":"openEuler-24.03-LTS-SP2", "category":"product_version" } ], "category":"product_name" }, { "name":"aarch64", "branches":[ { "product":{ "product_identification_helper":{ "cpe":"cpe:/a:openEuler:openEuler:24.03-LTS-SP2" }, "product_id":"bpftool-6.6.0-138.0.0.132.oe2403sp2.aarch64.rpm", 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(&tcp_ses->srv_lock){+.+.}-{3:3}, at: cifs_signal_cifsd_for_reconnect+0x134/0x200\n\nbut task is already holding lock:\nffff888119c64330 (&ret_buf->chan_lock){+.+.}-{3:3}, at: cifs_signal_cifsd_for_reconnect+0xcf/0x200\n\nwhich lock already depends on the new lock.\n\nthe existing dependency chain (in reverse order) is:\n\n-> #2 (&ret_buf->chan_lock){+.+.}-{3:3}:\n validate_chain+0x1cf/0x270\n __lock_acquire+0x60e/0x780\n lock_acquire.part.0+0xb4/0x1f0\n _raw_spin_lock+0x2f/0x40\n cifs_setup_session+0x81/0x4b0\n cifs_get_smb_ses+0x771/0x900\n cifs_mount_get_session+0x7e/0x170\n cifs_mount+0x92/0x2d0\n cifs_smb3_do_mount+0x161/0x460\n smb3_get_tree+0x55/0x90\n vfs_get_tree+0x46/0x180\n do_new_mount+0x1b0/0x2e0\n path_mount+0x6ee/0x740\n do_mount+0x98/0xe0\n __do_sys_mount+0x148/0x180\n do_syscall_64+0xa4/0x260\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\n-> #1 (&ret_buf->ses_lock){+.+.}-{3:3}:\n validate_chain+0x1cf/0x270\n __lock_acquire+0x60e/0x780\n lock_acquire.part.0+0xb4/0x1f0\n _raw_spin_lock+0x2f/0x40\n cifs_match_super+0x101/0x320\n sget+0xab/0x270\n cifs_smb3_do_mount+0x1e0/0x460\n smb3_get_tree+0x55/0x90\n vfs_get_tree+0x46/0x180\n do_new_mount+0x1b0/0x2e0\n path_mount+0x6ee/0x740\n do_mount+0x98/0xe0\n __do_sys_mount+0x148/0x180\n do_syscall_64+0xa4/0x260\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\n-> #0 (&tcp_ses->srv_lock){+.+.}-{3:3}:\n check_noncircular+0x95/0xc0\n check_prev_add+0x115/0x2f0\n validate_chain+0x1cf/0x270\n __lock_acquire+0x60e/0x780\n lock_acquire.part.0+0xb4/0x1f0\n _raw_spin_lock+0x2f/0x40\n cifs_signal_cifsd_for_reconnect+0x134/0x200\n __cifs_reconnect+0x8f/0x500\n cifs_handle_standard+0x112/0x280\n cifs_demultiplex_thread+0x64d/0xbc0\n kthread+0x2f7/0x310\n ret_from_fork+0x2a/0x230\n ret_from_fork_asm+0x1a/0x30\n\nother info that might help us debug this:\n\nChain exists of:\n &tcp_ses->srv_lock --> &ret_buf->ses_lock --> &ret_buf->chan_lock\n\n Possible unsafe locking scenario:\n\n CPU0 CPU1\n ---- ----\n lock(&ret_buf->chan_lock);\n lock(&ret_buf->ses_lock);\n lock(&ret_buf->chan_lock);\n lock(&tcp_ses->srv_lock);\n\n *** DEADLOCK ***\n\n3 locks held by cifsd/6055:\n #0: ffffffff857de398 (&cifs_tcp_ses_lock){+.+.}-{3:3}, at: cifs_signal_cifsd_for_reconnect+0x7b/0x200\n #1: ffff888119c64060 (&ret_buf->ses_lock){+.+.}-{3:3}, at: cifs_signal_cifsd_for_reconnect+0x9c/0x200\n #2: ffff888119c64330 (&ret_buf->chan_lock){+.+.}-{3:3}, at: cifs_signal_cifsd_for_reconnect+0xcf/0x200", "category":"description", "title":"Vulnerability Description" } ], "product_status":{ "fixed":[ "openEuler-24.03-LTS-SP2:bpftool-6.6.0-138.0.0.132.oe2403sp2.aarch64", "openEuler-24.03-LTS-SP2:bpftool-debuginfo-6.6.0-138.0.0.132.oe2403sp2.aarch64", "openEuler-24.03-LTS-SP2:kernel-6.6.0-138.0.0.132.oe2403sp2.aarch64", "openEuler-24.03-LTS-SP2:kernel-debuginfo-6.6.0-138.0.0.132.oe2403sp2.aarch64", "openEuler-24.03-LTS-SP2:kernel-debugsource-6.6.0-138.0.0.132.oe2403sp2.aarch64", 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"openEuler-24.03-LTS-SP2:kernel-6.6.0-138.0.0.132.oe2403sp2.src" ], "details":"kernel security update", "category":"vendor_fix", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-1305" } ], "scores":[ { "cvss_v3":{ "baseSeverity":"MEDIUM", "baseScore":5.5, "vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version":"3.1" }, "products":[ "openEuler-24.03-LTS-SP2:bpftool-6.6.0-138.0.0.132.oe2403sp2.aarch64", "openEuler-24.03-LTS-SP2:bpftool-debuginfo-6.6.0-138.0.0.132.oe2403sp2.aarch64", "openEuler-24.03-LTS-SP2:kernel-6.6.0-138.0.0.132.oe2403sp2.aarch64", "openEuler-24.03-LTS-SP2:kernel-debuginfo-6.6.0-138.0.0.132.oe2403sp2.aarch64", "openEuler-24.03-LTS-SP2:kernel-debugsource-6.6.0-138.0.0.132.oe2403sp2.aarch64", "openEuler-24.03-LTS-SP2:kernel-devel-6.6.0-138.0.0.132.oe2403sp2.aarch64", "openEuler-24.03-LTS-SP2:kernel-extra-modules-6.6.0-138.0.0.132.oe2403sp2.aarch64", 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"openEuler-24.03-LTS-SP2:python3-perf-debuginfo-6.6.0-138.0.0.132.oe2403sp2.x86_64", "openEuler-24.03-LTS-SP2:kernel-6.6.0-138.0.0.132.oe2403sp2.src" ] } ], "threats":[ { "details":"Medium", "category":"impact" } ], "title":"CVE-2025-38244" } ] }