CVE-2026-97556: Linux

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: smb: client: avoid leaking refcount when cifs_sb_tlink() fails cifs_oplock_break() takes over the reference that cifs_queue_oplock_break() acquired when it queued the work, and drops it with _cifsFileInfo_put() once the break has been processed. Only in setups with "-o multiuser", cifs_sb_tlink() may fail, at which point cifs_oplock_break() returns without putting the file reference, mirroring the reference leak we already fixed in the companion patch to cifs_queue_oplock_break(). This would trigger a crash due to busy inodes on the next unmount: BUG: Dentry ... still in use (1) [unmount of cifs cifs] VFS: Busy inodes after unmount of cifs (cifs) Drop the reference on that path as well. Doing so before the out label mirrors the normal path, which also puts the reference before cifs_done_oplock_break(). Found by Sashiko code review. The failure path was not exercised at runtime.

Засегнати продукти

• Linux Linux: b99f490ea87ebcca3a429fd8837067feb56a4c7c преди f1fd8a84181b3af03c508e0b02b4877945dd070a; 5ee28bcfbaacf289eb25c662a2862542ea6ce6a7 преди 55c5f095d4df14271b238f826e1392fda7b6e60e; e8f5f849ffce24490eb9449e98312b66c0dba76f преди e9c5bcc88b8337157e480c85a6d2f326bc265012; e8f5f849ffce24490eb9449e98312b66c0dba76f преди 9ec991e148368e3207e98134c509a625097f7693; e8f5f849ffce24490eb9449e98312b66c0dba76f преди dd03fd658ea59821505e0e643b6b7cbdf51c4e1d; e8f5f849ffce24490eb9449e98312b66c0dba76f преди 1d1b0f1d812a4011a57bc6c70492c34a2e46c6dd; e8f5f849ffce24490eb9449e98312b66c0dba76f преди 23b26f4408ac3f35a482d2e5cf6fc865d4201b71; 6b67a6d2e50634fe127e656147c81915955e9f5e; 5.15.128 преди 5.15.224; 6.1.47 преди 6.1.189; 6.4.12 преди 6.5
• Linux Linux: 6.5; преди 6.5; 5.15.224 до 5.15.*; 6.1.189 до 6.1.*; 6.6.158 до 6.6.*; 6.12.111 до 6.12.*; 6.18.53 до 6.18.*; 7.2.7 до 7.2.*; 7.3 до *

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99268
• CVE-2026-99266
• CVE-2026-99267

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-97556
• https://nvd.nist.gov/vuln/detail/CVE-2026-97556
• https://git.kernel.org/stable/c/f1fd8a84181b3af03c508e0b02b4877945dd070a
• https://git.kernel.org/stable/c/55c5f095d4df14271b238f826e1392fda7b6e60e
• https://git.kernel.org/stable/c/e9c5bcc88b8337157e480c85a6d2f326bc265012
• https://git.kernel.org/stable/c/9ec991e148368e3207e98134c509a625097f7693
• https://git.kernel.org/stable/c/dd03fd658ea59821505e0e643b6b7cbdf51c4e1d
• https://git.kernel.org/stable/c/1d1b0f1d812a4011a57bc6c70492c34a2e46c6dd
• https://git.kernel.org/stable/c/23b26f4408ac3f35a482d2e5cf6fc865d4201b71