CVE-2026-23230
Severity
5.5MEDIUM
EPSS
0.0%
top 93.77%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedFeb 18
Description
In the Linux kernel, the following vulnerability has been resolved:
smb: client: split cached_fid bitfields to avoid shared-byte RMW races
is_open, has_lease and on_list are stored in the same bitfield byte in
struct cached_fid but are updated in different code paths that may run
concurrently. Bitfield assignments generate byte read–modify–write
operations (e.g. `orb $mask, addr` on x86_64), so updating one flag can
restore stale values of the others.
A possible interleaving is:
CPU1: load ol…
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HExploitability: 2.8 | Impact: 5.9
Affected Packages4 packages
▶CVEListV5linux/linuxebe98f1447bbccf8228335c62d86af02a0ed23f7 — 569fecc56bfe4df66f05734d67daef887746656b+6
Patches
🔴Vulnerability Details
3OSV▶
CVE-2026-23230: In the Linux kernel, the following vulnerability has been resolved: smb: client: split cached_fid bitfields to avoid shared-byte RMW races is_open, ha↗2026-02-18
GHSA▶
GHSA-p68h-c56f-p3v6: In the Linux kernel, the following vulnerability has been resolved:
smb: client: split cached_fid bitfields to avoid shared-byte RMW races
is_open,↗2026-02-18
📋Vendor Advisories
3Debian▶
CVE-2026-23230: linux - In the Linux kernel, the following vulnerability has been resolved: smb: client...↗2026