CVE-2026-89639High· 7.1▾ TwilightIn 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_l…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 39.1 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Sep 12.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
0.2%
— → 7.1
none → high
7.1 → 3.3
high → low
3.3 → 7.1
low → high
7.1 → 3.3
high → low
3.3 → 5.5
low → medium
0.2% → 0.2%
Last analysed / modified upstream
5.5 → 7.1
medium → high
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.
Linux >= efbcecdecefc26fa062c0e8210533ccad7d6bd4a < 8b9b10fe5b8b492b27b9f4546742ea541a650213Linux >= fa724e235cfdb0fb0bb427d0f9dfe864ae27403e < 81fc3868a7f726980ff845c1d0d271051e5f0f45Linux >= fa724e235cfdb0fb0bb427d0f9dfe864ae27403e < 364b183230586a62660a7280c1eb20138338eeb5Linux 6838bcac954487cc0a3c8a4ee1b3a3a30e244dc9Linux 75640976cf474eb41682a13f2dbe9534ac26ca50Linux 3513f3931c579ba2a715784c6dedc59e0d9282eeLinux >= 6.18.44 < 6.18.50Linux >= 6.12.105 < 6.13Linux >= 7.1.8 < 7.2Linux 7.2Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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