{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2025-37750 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2025-37750 is a critical use after free vulnerability in Linux kernel, published on 1 May 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-2025-37750 and fix it if it is affected.\n\nWhat it is: CVE-2025-37750 is a critical use after free vulnerability in Linux kernel, published on 1 May 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-2025-37750 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-2025-37750/ (Markdown: https://insights.sbomify.com/CVE-2025-37750/index.md)","id":"CVE-2025-37750","markdown":"https://insights.sbomify.com/CVE-2025-37750/index.md","name":"CVE-2025-37750","record":{"aliases":["AZL-69737","BELL-CVE-2025-37750","DEBIAN-CVE-2025-37750","GHSA-r3p6-jggx-m3qg","RHSA-2025:9393","ROOT-OS-DEBIAN-12-CVE-2025-37750","ROOT-OS-UBUNTU-2404-CVE-2025-37750","UBUNTU-CVE-2025-37750"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service","code_execution"],"network_reachable":"yes","non_default_config":true,"product_category":"Linux kernel SMB client","requires_auth":"none","summary":"A use-after-free vulnerability in the Linux kernel SMB client allows attackers to cause a denial of service or potentially execute code when multichannel encryption is enabled.","user_interaction":"not_required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[{"product":"linux_kernel","vendor":"linux"}],"cvss":{"score":9.8,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-416","name":"Use After Free"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix UAF in decryption with multichannel\n\nAfter commit f7025d861694 (\"smb: client: allocate crypto only for\nprimary server\") and commit b0abcd65ec54 (\"smb: client: fix UAF in\nasync decryption\"), the channels started reusing AEAD TFM from primary\nchannel to perform synchronous decryption, but that can't done as\nthere could be multiple cifsd threads (one per channel) simultaneously\naccessing it to perform decryption.\n\nThis fixes the following KASAN splat when running fstest generic/249\nwith 'vers=3.1.1,multichannel,max_channels=4,seal' against Windows\nServer 2022:\n\nBUG: KASAN: slab-use-after-free in gf128mul_4k_lle+0xba/0x110\nRead of size 8 at addr ffff8881046c18a0 by task cifsd/986\nCPU: 3 UID: 0 PID: 986 Comm: cifsd Not tainted 6.15.0-rc1 #1\nPREEMPT(voluntary)\nHardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-3.fc41\n04/01/2014\nCall Trace:\n \u003cTASK\u003e\n dump_stack_lvl+0x5d/0x80\n print_report+0x156/0x528\n ? gf128mul_4k_lle+0xba/0x110\n ? __virt_addr_valid+0x145/0x300\n ? __phys_addr+0x46/0x90\n ? gf128mul_4k_lle+0xba/0x110\n kasan_report+0xdf/0x1a0\n ? gf128mul_4k_lle+0xba/0x110\n gf128mul_4k_lle+0xba/0x110\n ghash_update+0x189/0x210\n shash_ahash_update+0x295/0x370\n ? __pfx_shash_ahash_update+0x10/0x10\n ? __pfx_shash_ahash_update+0x10/0x10\n ? __pfx_extract_iter_to_sg+0x10/0x10\n ? ___kmalloc_large_node+0x10e/0x180\n ? __asan_memset+0x23/0x50\n crypto_ahash_update+0x3c/0xc0\n gcm_hash_assoc_remain_continue+0x93/0xc0\n crypt_message+0xe09/0xec0 [cifs]\n ? __pfx_crypt_message+0x10/0x10 [cifs]\n ? _raw_spin_unlock+0x23/0x40\n ? __pfx_cifs_readv_from_socket+0x10/0x10 [cifs]\n decrypt_raw_data+0x229/0x380 [cifs]\n ? __pfx_decrypt_raw_data+0x10/0x10 [cifs]\n ? __pfx_cifs_read_iter_from_socket+0x10/0x10 [cifs]\n smb3_receive_transform+0x837/0xc80 [cifs]\n ? __pfx_smb3_receive_transform+0x10/0x10 [cifs]\n ? __pfx___might_resched+0x10/0x10\n ? __pfx_smb3_is_transform_hdr+0x10/0x10 [cifs]\n cifs_demultiplex_thread+0x692/0x1570 [cifs]\n ? __pfx_cifs_demultiplex_thread+0x10/0x10 [cifs]\n ? rcu_is_watching+0x20/0x50\n ? rcu_lockdep_current_cpu_online+0x62/0xb0\n ? find_held_lock+0x32/0x90\n ? kvm_sched_clock_read+0x11/0x20\n ? local_clock_noinstr+0xd/0xd0\n ? trace_irq_enable.constprop.0+0xa8/0xe0\n ? __pfx_cifs_demultiplex_thread+0x10/0x10 [cifs]\n kthread+0x1fe/0x380\n ? kthread+0x10f/0x380\n ? __pfx_kthread+0x10/0x10\n ? local_clock_noinstr+0xd/0xd0\n ? ret_from_fork+0x1b/0x60\n ? local_clock+0x15/0x30\n ? lock_release+0x29b/0x390\n ? rcu_is_watching+0x20/0x50\n ? __pfx_kthread+0x10/0x10\n ret_from_fork+0x31/0x60\n ? __pfx_kthread+0x10/0x10\n ret_from_fork_asm+0x1a/0x30\n \u003c/TASK\u003e","ecosystems":["Red Hat:enterprise_linux:9::baseos"],"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 UAF in decryption with multichannel","id":"CVE-2025-37750","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"use_after_free","year":"2025"},"n_packages":3,"n_references":5,"next":{"headline":"x86/cpu: Avoid running off the end of an AMD erratum table","id":"CVE-2025-37751"},"packages":[{"ecosystem":"Red Hat:enterprise_linux:9::baseos","fixed":["0:1-2.el9_6"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-5_14_0-570_17_1","purl":"pkg:rpm/redhat/kpatch-patch-5_14_0-570_17_1","source":"RHSA-2025:9393"},{"ecosystem":"Red Hat:enterprise_linux:9::baseos","fixed":["0:1-2.el9_6"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-5_14_0-570_17_1-debuginfo","purl":"pkg:rpm/redhat/kpatch-patch-5_14_0-570_17_1-debuginfo","source":"RHSA-2025:9393"},{"ecosystem":"Red Hat:enterprise_linux:9::baseos","fixed":["0:1-2.el9_6"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-5_14_0-570_17_1-debugsource","purl":"pkg:rpm/redhat/kpatch-patch-5_14_0-570_17_1-debugsource","source":"RHSA-2025:9393"}],"prev":{"headline":"net: ppp: Add bound checking for skb data on ppp_sync_txmung","id":"CVE-2025-37749"},"products":["Linux"],"published":"2025-05-01","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":"CC BY 4.0","name":"Red Hat","prefix":"RHSA"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-10-21","vendors":["Linux"]},"summary":"A use-after-free vulnerability in the Linux kernel SMB client allows attackers to cause a denial of service or potentially execute code when multichannel encryption is enabled.","url":"https://insights.sbomify.com/CVE-2025-37750/"}