CVE-2026-89639
- Source
- https://cve.org/CVERecord?id=CVE-2026-89639
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89639.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-89639
- Downstream
BELL (1)
DEBIAN (1)
MGASA (2)
openSUSE (1)
UBUNTU (1)
- Related
- Published
- 2026-09-11T19:45:32Z
- Modified
- 2026-10-24T02:50:10Z
- Severity
-
- 7.1 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
- Summary
- cifs: use cifs_invalidate_cache() in cifs_do_truncate() for O_TRUNC
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
cifs: use cifs_invalidate_cache() in cifs_do_truncate() for O_TRUNC
cifs_do_truncate() is invoked from cifs_open() without i_rwsem, so it cannot use cifs_resize_file_locked() to perform a proper fscache cookie resize. Instead, add cifs_invalidate_cache() after cifs_setsize().
cifs_invalidate_cache() calls fscache_invalidate(), which works without holding i_rwsem: it unconditionally increments inval_counter and sets FSCACHE_COOKIE_NO_DATA_TO_READ, ensuring that stale cached data is not served once the cookie is later activated by fscache_use_cookie(). Truncation to zero leaves no valid cached data, making invalidation the correct semantic here.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89639.json" }- References
-
- https://git.kernel.org/stable/c/364b183230586a62660a7280c1eb20138338eeb5
- https://git.kernel.org/stable/c/81fc3868a7f726980ff845c1d0d271051e5f0f45
- https://git.kernel.org/stable/c/8b9b10fe5b8b492b27b9f4546742ea541a650213
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89639.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-89639
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedefbcecdecefc26fa062c0e8210533ccad7d6bd4aFixed8b9b10fe5b8b492b27b9f4546742ea541a650213
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedfa724e235cfdb0fb0bb427d0f9dfe864ae27403eFixed81fc3868a7f726980ff845c1d0d271051e5f0f45Fixed364b183230586a62660a7280c1eb20138338eeb5
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced6.18.44Fixed6.18.50
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced6.12.105Fixed6.13
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced7.1.8Fixed7.2
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced6838bcac954487cc0a3c8a4ee1b3a3a30e244dc9
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced75640976cf474eb41682a13f2dbe9534ac26ca50
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced3513f3931c579ba2a715784c6dedc59e0d9282ee