{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2025-21725 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2025-21725 is a high-severity denial of service vulnerability in Linux kernel, published on 27 Feb 2025. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2025-21725 and fix it if it is affected.\n\nWhat it is: CVE-2025-21725 is a high-severity denial of service vulnerability in Linux kernel, published on 27 Feb 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2025-21725 in the wild and no public exploit code.\n\nAffected product: Linux kernel. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2025-21725/ (Markdown: https://insights.sbomify.com/CVE-2025-21725/index.md)","id":"CVE-2025-21725","markdown":"https://insights.sbomify.com/CVE-2025-21725/index.md","name":"CVE-2025-21725","record":{"aliases":["BELL-CVE-2025-21725","DEBIAN-CVE-2025-21725","GHSA-m8fp-8h73-pc3r","ROOT-OS-UBUNTU-2404-CVE-2025-21725","UBUNTU-CVE-2025-21725"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Linux kernel SMB client","requires_auth":"none","summary":"A local attacker can cause a kernel crash by reading debug data when the SMB server does not set the link speed.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[{"product":"linux_kernel","vendor":"linux"}],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix oops due to unset link speed\n\nIt isn't guaranteed that NETWORK_INTERFACE_INFO::LinkSpeed will always\nbe set by the server, so the client must handle any values and then\nprevent oopses like below from happening:\n\nOops: divide error: 0000 [#1] PREEMPT SMP KASAN NOPTI\nCPU: 0 UID: 0 PID: 1323 Comm: cat Not tainted 6.13.0-rc7 #2\nHardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-3.fc41\n04/01/2014\nRIP: 0010:cifs_debug_data_proc_show+0xa45/0x1460 [cifs] Code: 00 00 48\n89 df e8 3b cd 1b c1 41 f6 44 24 2c 04 0f 84 50 01 00 00 48 89 ef e8\ne7 d0 1b c1 49 8b 44 24 18 31 d2 49 8d 7c 24 28 \u003c48\u003e f7 74 24 18 48 89\nc3 e8 6e cf 1b c1 41 8b 6c 24 28 49 8d 7c 24\nRSP: 0018:ffffc90001817be0 EFLAGS: 00010246\nRAX: 0000000000000000 RBX: ffff88811230022c RCX: ffffffffc041bd99\nRDX: 0000000000000000 RSI: 0000000000000567 RDI: ffff888112300228\nRBP: ffff888112300218 R08: fffff52000302f5f R09: ffffed1022fa58ac\nR10: ffff888117d2c566 R11: 00000000fffffffe R12: ffff888112300200\nR13: 000000012a15343f R14: 0000000000000001 R15: ffff888113f2db58\nFS: 00007fe27119e740(0000) GS:ffff888148600000(0000)\nknlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007fe2633c5000 CR3: 0000000124da0000 CR4: 0000000000750ef0\nPKRU: 55555554\nCall Trace:\n \u003cTASK\u003e\n ? __die_body.cold+0x19/0x27\n ? die+0x2e/0x50\n ? do_trap+0x159/0x1b0\n ? cifs_debug_data_proc_show+0xa45/0x1460 [cifs]\n ? do_error_trap+0x90/0x130\n ? cifs_debug_data_proc_show+0xa45/0x1460 [cifs]\n ? exc_divide_error+0x39/0x50\n ? cifs_debug_data_proc_show+0xa45/0x1460 [cifs]\n ? asm_exc_divide_error+0x1a/0x20\n ? cifs_debug_data_proc_show+0xa39/0x1460 [cifs]\n ? cifs_debug_data_proc_show+0xa45/0x1460 [cifs]\n ? seq_read_iter+0x42e/0x790\n seq_read_iter+0x19a/0x790\n proc_reg_read_iter+0xbe/0x110\n ? __pfx_proc_reg_read_iter+0x10/0x10\n vfs_read+0x469/0x570\n ? do_user_addr_fault+0x398/0x760\n ? __pfx_vfs_read+0x10/0x10\n ? find_held_lock+0x8a/0xa0\n ? __pfx_lock_release+0x10/0x10\n ksys_read+0xd3/0x170\n ? __pfx_ksys_read+0x10/0x10\n ? __rcu_read_unlock+0x50/0x270\n ? mark_held_locks+0x1a/0x90\n do_syscall_64+0xbb/0x1d0\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\nRIP: 0033:0x7fe271288911\nCode: 00 48 8b 15 01 25 10 00 f7 d8 64 89 02 b8 ff ff ff ff eb bd e8\n20 ad 01 00 f3 0f 1e fa 80 3d b5 a7 10 00 00 74 13 31 c0 0f 05 \u003c48\u003e 3d\n00 f0 ff ff 77 4f c3 66 0f 1f 44 00 00 55 48 89 e5 48 83 ec\nRSP: 002b:00007ffe87c079d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000\nRAX: ffffffffffffffda RBX: 0000000000040000 RCX: 00007fe271288911\nRDX: 0000000000040000 RSI: 00007fe2633c6000 RDI: 0000000000000003\nRBP: 00007ffe87c07a00 R08: 0000000000000000 R09: 00007fe2713e6380\nR10: 0000000000000022 R11: 0000000000000246 R12: 0000000000040000\nR13: 00007fe2633c6000 R14: 0000000000000003 R15: 0000000000000000\n \u003c/TASK\u003e\n\nFix this by setting cifs_server_iface::speed to a sane value (1Gbps)\nby default when link speed is unset.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"smb: client: fix oops due to unset link speed","id":"CVE-2025-21725","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"denial_of_service","year":"2025"},"n_packages":0,"n_references":5,"next":{"headline":"padata: avoid UAF for reorder_work","id":"CVE-2025-21726"},"packages":[],"prev":{"headline":"iommufd/iova_bitmap: Fix shift-out-of-bounds in iova_bitmap_offset_to_index()","id":"CVE-2025-21724"},"products":["Linux"],"published":"2025-02-27","related":[{"cvss_score":8.8,"headline":"Linux Kernel Out-of-Bounds Write","id":"CVE-2026-53266","kev_date_added":"2026-09-18","published":"2026-06-25"},{"cvss_score":8.8,"headline":"Linux Kernel Improper Input Validation","id":"CVE-2013-6282","kev_date_added":"2022-09-15","published":"2013-11-19"},{"cvss_score":8.4,"headline":"Linux Kernel Heap-Based Buffer Overflow","id":"CVE-2022-0185","kev_date_added":"2024-08-21","published":"2022-02-11"},{"cvss_score":8.4,"headline":"Linux Kernel Privilege Escalation","id":"CVE-2013-2094","kev_date_added":"2022-09-15","published":"2013-05-14"},{"cvss_score":7.8,"headline":"Linux Kernel Unspecified","id":"CVE-2026-53362","kev_date_added":"2026-08-27","published":"2026-07-04"},{"cvss_score":7.8,"headline":"Linux Kernel Missing Initialization of a Variable","id":"CVE-2026-46300","kev_date_added":"2026-10-28","published":"2026-05-23"},{"cvss_score":7.8,"headline":"Linux Kernel Race Condition","id":"CVE-2025-39964","kev_date_added":"2026-09-18","published":"2025-10-13"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-10-15","vendors":["Linux"]},"summary":"A local attacker can cause a kernel crash by reading debug data when the SMB server does not set the link speed.","url":"https://insights.sbomify.com/CVE-2025-21725/"}