CVE-2025-68774
mediumPriorität · verfolgen · 0EPSS 0.006 · 47. PerzentilDEEURUEPSS · bewertet 2026-10-22
In the Linux kernel, the following vulnerability has been resolved: hfsplus: fix missing hfs_bnode_get() in __hfs_bnode_create When sync() and link() are called concurrently, both threads may enter hfs_bnode_find() without finding the node in the hash table and proceed to create it. Thread A: hfsplus_write_inode() -> hfsplus_write_system_inode() -> hfs_btree_write() -> hfs_bnode_find(tree, 0) -> __hfs_bnode_create(tree, 0) Thread B: hfsplus_create_cat() -> hfs_brec_insert() -> hfs_bnode_split() -> hfs_bmap_alloc() -> hfs_bnode_find(tree, 0) -> __hfs_bnode_create(tree, 0) In this case, thread A creates the bnode, sets refcnt=1, and hashes it. Thread B also tries to create the same bnode, notices it has already been inserted, drops its own instance, and uses the hashed one without getting the node. ``` node2 = hfs_bnode_findhash(tree, cnid); if (!node2) { <- Thread A hash = hfs_bnode_hash(cnid); node->next_hash = tree->node_hash[hash]; tree->node_hash[hash] = node; tree->node_hash_cnt++; } else { <- Thread B spin_unlock(&tree->hash_lock); kfree(node); wait_event(node2->lock_wq, !test_bit(HFS_BNODE_NEW, &node2->flags)); return node2; } ``` However, hfs_bnode_find() requires each call to take a reference. Here both threads end up setting refcnt=1. When they later put the node, this triggers: BUG_ON(!atomic_read(&node->refcnt)) In this scenario, Thread B in fact finds the node in the hash table rather than creating a new one, and thus must take a reference. Fix this by calling hfs_bnode_get() when reusing a bnode newly created by another thread to ensure the refcount is updated correctly. A similar bug was fixed in HFS long ago in commit a9dc087fd3c4 ("fix missing hfs_bnode_get() in __hfs_bnode_create") but the same issue remained in HFS+ until now.
Behebungen
Hersteller-Fix, Mitigation oder Workaround, wie von den Quellen veröffentlicht.
Ein Hersteller-Fix ist verfügbar.
- Behobencluster-md-kmp-default-0:4.12.14-122.293.1.aarch64 as component of SUSE Linux Enterprise Server 12 SP5-LTSSsuse_csaf
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To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
- Behobenkernel-default-base-0:4.12.14-122.293.1.s390x as component of SUSE Linux Enterprise Server 12 SP5-LTSSsuse_csaf
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- Behobenkernel-default-base-0:4.12.14-122.293.1.x86_64 as component of SUSE Linux Enterprise Server 12 SP5-LTSSsuse_csaf
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To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
- Behobenkernel-syms-0:4.12.14-122.293.1.x86_64 as component of SUSE Linux Enterprise Server 12 SP5-LTSSsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
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- Behobenocfs2-kmp-default-0:4.12.14-122.293.1.ppc64le as component of SUSE Linux Enterprise Server 12 SP5-LTSSsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
- Behobenocfs2-kmp-default-0:4.12.14-122.293.1.s390x as component of SUSE Linux Enterprise Server 12 SP5-LTSSsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
- Behobenocfs2-kmp-default-0:4.12.14-122.293.1.x86_64 as component of SUSE Linux Enterprise Server 12 SP5-LTSSsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
- Behobenocfs2-kmp-default-0:4.12.14-122.293.1.x86_64 as component of SUSE Linux Enterprise Server LTSS Extended Security 12 SP5suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
cvss
Technischer Schweregrad, 0–10. Eine Zeile je Quelle.
Basiswert 0–10 · höher = schwerwiegender · Vektor überfahren zum Auflösen⚠ Quellen uneinig · medium–high · 4.7–7.5
schwächen
Die CWE-Schwächeklassen, zu denen dies gehört.
betroffene Produkte (47)
Betroffene Produkte und Versionsbereiche.
- IBM Power Hardware Management Console V10.3.1050.0-V10.3.1063.2alle Versionencert_bundDEcpe:/a:ibm:hardware_management_console:v10.3.1050.0_-_v10.3.1063.2
- IBM Power Hardware Management Console V11.1.1110.0-V11.1.1111.5alle Versionencert_bundDEcpe:/a:ibm:hardware_management_console:v11.1.1110.0_-_v11.1.1111.5
Advisories (2)
Hersteller- und Ökosystem-Meldungen dazu.
- SUSE-SU-2026:0473-1Security update for the Linux Kernel2026-02-12csaf · suse_csafDE
Security update for the Linux Kernel
- WID-SEC-W-2026-0086Linux Kernel: Mehrere SchwachstellenDeutsch2026-01-13csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen im Linux Kernel ausnutzen um nicht näher spezifizierte Angriffe durchzuführen, die möglicherweise zu einer Denial-of-Service- Bedingung führen oder eine Speicherbeschädigung verursachen können.
auch bekannt als (5)
Weitere Namen und Kennungen dieser Entität.
quellen
Welche Quellen diesen Datensatz belegen und wann.
Referenzen (20)
Externe Belege — Patches, Meldungen, Analysen.
- https://git.kernel.org/stable/c/152af114287851583cf7e0abc10129941f19466acnnvd
- https://git.kernel.org/stable/c/457f795e7abd7770de10216d7f9994a3f12a56d6cnnvd
- https://git.kernel.org/stable/c/5882e7c8cdbb5e254a69628b780acff89c78071ecnnvd
- https://git.kernel.org/stable/c/b68dc4134b18a3922cd33439ec614aad4172bc86cnnvd
- https://git.kernel.org/stable/c/b9d1c6bb5f19460074ce9862cb80be86b5fb0a50cnnvd
- https://www.kernel.org/Patchcnnvd
- https://git.kernel.org/stable/c/152af114287851583cf7e0abc10129941f19466aenisa_euvd
- https://git.kernel.org/stable/c/39e149d58ef4d7883cbf87448d39d51292fd342denisa_euvd
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