In the Linux kernel, the following vulnerability has been resolved:
smb/client: invalidate fscache for fallocate range operations
smb3_zero_range(), smb3_punch_hole(), smb3_insert_range(), and
smb3_collapse_range() modify file contents through server-side range
operations. These operations discard the affected page cache, but leave
the FS-Cache cookie valid, so a later read may return data cached before
the range operation.
Fix this by invalidating FS-Cache after outstanding I/O has completed
and before modifying the file on the server.
Run the following as root on a CIFS mount with fsc enabled and an active
CacheFiles backend:
bash -c '
MNT=/mnt/cifs
FILE="$MNT/repro"
# Generate four 1 MiB random blocks: [A][B][C][D].
dd if=/dev/urandom of=/tmp/src bs=1M count=4 status=none
# Expected contents after zeroing B: [A][zero][C][D].
cp /tmp/src /tmp/expected
dd if=/dev/zero of=/tmp/expected bs=1M seek=1 count=1 \
conv=notrunc status=none
cp /tmp/src "$FILE"
# Populate FS-Cache, then discard the page cache.
sync
echo 1 > /proc/sys/vm/drop_caches
cat "$FILE" > /dev/null
sync
echo 1 > /proc/sys/vm/drop_caches
fallocate --zero-range -o 1M -l 1M "$FILE"
if cmp -s /tmp/expected "$FILE"; then
echo "readback: OK"
else
echo "readback: STALE DATA"
fi
'
Before this change, the readback differs from /tmp/expected:
readback: STALE DATA
After this change, it matches:
readback: OK
References
Configurations
Configuration 1 (hide)
|
History
22 Oct 2026, 16:38
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| CWE | CWE-672 | |
| CPE | cpe:2.3:o:linux:linux_kernel:3.17:rc6:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:3.17:rc4:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.13:-:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:3.17:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.3:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:3.17:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:3.17:rc5:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:3.17:rc7:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:3.17:-:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:-:*:*:*:*:*:* |
|
| References | () https://git.kernel.org/stable/c/448ba0ae65ca61064183564d2983c9aa59bd6ba7 - Patch | |
| References | () https://git.kernel.org/stable/c/93c6e5a8d7c5071d586c1411596d5db5faad22b2 - Patch | |
| References | () https://git.kernel.org/stable/c/cc7202a51b8777a757bda9dcfbf339f828c6a130 - Patch | |
| References | () https://git.kernel.org/stable/c/dd8b1e808f5c19479e6ed47e2f88a1fd46f8b0e5 - Patch | |
| First Time |
Linux linux Kernel
Linux |
21 Oct 2026, 13:21
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
25 Sep 2026, 11:17
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-09-25 11:17
Updated : 2026-10-22 16:38
NVD link : CVE-2026-98124
Mitre link : CVE-2026-98124
CVE.ORG link : CVE-2026-98124
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-672
Operation on a Resource after Expiration or Release