CVE-2026-97556
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
smb: client: avoid leaking refcount when cifs_sb_tlink() fails
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.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 5ee28bcfbaacf289eb25c662a2862542ea6ce6a7 | affected | git | 55c5f095d4df14271b238f826e1392fda7b6e60e | Unavailable | None listed |
| e8f5f849ffce24490eb9449e98312b66c0dba76f | affected | git | e9c5bcc88b8337157e480c85a6d2f326bc265012 | Unavailable | None listed |
| e8f5f849ffce24490eb9449e98312b66c0dba76f | affected | git | 9ec991e148368e3207e98134c509a625097f7693 | Unavailable | None listed |
| e8f5f849ffce24490eb9449e98312b66c0dba76f | affected | git | dd03fd658ea59821505e0e643b6b7cbdf51c4e1d | Unavailable | None listed |
| e8f5f849ffce24490eb9449e98312b66c0dba76f | affected | git | 1d1b0f1d812a4011a57bc6c70492c34a2e46c6dd | Unavailable | None listed |
| e8f5f849ffce24490eb9449e98312b66c0dba76f | affected | git | 23b26f4408ac3f35a482d2e5cf6fc865d4201b71 | Unavailable | None listed |
| b99f490ea87ebcca3a429fd8837067feb56a4c7c | affected | git | Unavailable | Unavailable | None listed |
| 6b67a6d2e50634fe127e656147c81915955e9f5e | affected | git | Unavailable | Unavailable | None listed |
| 6.1.47 | affected | semver | 6.1.189 | Unavailable | None listed |
| 5.15.128 | affected | semver | 5.16 | Unavailable | None listed |
| 6.4.12 | affected | semver | 6.5 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 6.5 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 6.5 | Unavailable | None listed |
| 6.1.189 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.158 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.111 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.53 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.2.7 | unaffected | semver | Unavailable | 7.2.* | None listed |
| 7.3 | unaffected | original_commit_for_fix | Unavailable | * | None listed |