CVE-2026-74259
cifs: remove all cifs files before kill super
Description
In the Linux kernel, the following vulnerability has been resolved: cifs: remove all cifs files before kill super Cifs files may be put into fileinfo_put_wq during umounting cifs. After umount done, cifsFileInfo_put_final is called, which cause following BUG: BUG: kernel NULL pointer dereference, address: 0000000000000000 ... [ 134.222152] list_lru_add+0x64/0x1a0 [ 134.222399] ? cifs_put_tcon+0x171/0x340 [cifs] [ 134.222772] d_lru_add+0x44/0x60 [ 134.222997] dput+0x1fc/0x210 [ 134.223213] cifsFileInfo_put_final+0x11a/0x140 [cifs] [ 134.223576] process_one_work+0x17c/0x320 [ 134.223843] worker_thread+0x188/0x280 [ 134.224084] ? __pfx_worker_thread+0x10/0x10 [ 134.224366] kthread+0xcc/0x100 [ 134.224576] ? __pfx_kthread+0x10/0x10 [ 134.224827] ret_from_fork+0x30/0x50 [ 134.225063] ? __pfx_kthread+0x10/0x10 [ 134.225328] ret_from_fork_asm+0x1b/0x30 This can be reproduce by following: unshare -n bash -c " mkdir -p ${CIFS_MNT} ip netns attach root 1 ip link add eth0 type veth peer veth0 netns root ip link set eth0 up ip -n root link set veth0 up ip addr add 192.168.0.2/24 dev eth0 ip -n root addr add 192.168.0.1/24 dev veth0 ip route add default via 192.168.0.1 dev eth0 ip netns exec root sysctl net.ipv4.ip_forward=1 ip netns exec root iptables -t nat -A POSTROUTING -s 192.168.0.2 -o ${DEV} -j MASQUERADE mount -t cifs ${CIFS_PATH} ${CIFS_MNT} -o vers=3.0,sec=ntlmssp,credentials=${CIFS_CRED},rsize=65536,wsize=65536,cache=none,echo_interval=1 touch ${CIFS_MNT}/a.txt ip netns exec root iptables -t nat -D POSTROUTING -s 192.168.0.2 -o ${DEV} -j MASQUERADE " umount ${CIFS_MNT}
INFO
Published Date :
Aug. 15, 2026, 6:22 a.m.
Last Modified :
Aug. 17, 2026, 6:19 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
- Update the Linux kernel.
- Ensure all CIFS files are removed before unmounting.
- Apply the 'cifs: remove all cifs files before kill super' patch.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-74259.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-74259 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-74259
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-74259 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-74259 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 17, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '708c276f516d27beaded7f372ac8111cee43926c', 'lessThan': '55fb9581986141659002264fdc75cef307811eb8', 'versionType': 'git'}, {'status': 'affected', 'version': '0629a1a187e424373364d681b42b101894bdb548', 'lessThan': '4465ebe67d89345954bb3622b25dd13e06f9d367', 'versionType': 'git'}, {'status': 'affected', 'version': '0e4b8faaaebe3137bec5723ef2b3cb0437fb38fd', 'lessThan': '3baedc9b2f53e6a6ac57b16fdff0f9b954d9ca71', 'versionType': 'git'}, {'status': 'affected', 'version': 'f655467a9973f964b267871e5fef533ad5014494', 'lessThan': '21303c4a2b7275e626c6b67de0f45f2d5b9bb3e7', 'versionType': 'git'}, {'status': 'affected', 'version': '340cea84f691c5206561bb2e0147158fe02070be', 'lessThan': '7839f1817a0cb6c4ed5cfe25d04845c43380a129', 'versionType': 'git'}, {'status': 'affected', 'version': '340cea84f691c5206561bb2e0147158fe02070be', 'lessThan': '6d9a4aaaa8b2612b5ef9d581e2f286a458b71ee1', 'versionType': 'git'}, {'status': 'affected', 'version': '30afc6ea72cc6cf7c8d579e79b64232801c38d08', 'versionType': 'git'}, {'status': 'affected', 'version': '6.1.167', 'lessThan': '6.1.178', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.6.130', 'lessThan': '6.6.145', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.12.78', 'lessThan': '6.12.97', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.18.20', 'lessThan': '6.18.40', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.19.10', 'lessThan': '6.20', 'versionType': 'semver'}], 'programFiles': ['fs/smb/client/connect.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '7.0'}, {'status': 'unaffected', 'version': '0', 'lessThan': '7.0', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/smb/client/connect.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '708c276f516d27beaded7f372ac8111cee43926c', 'lessThan': '55fb9581986141659002264fdc75cef307811eb8', 'versionType': 'git'}, {'status': 'affected', 'version': '0629a1a187e424373364d681b42b101894bdb548', 'lessThan': '4465ebe67d89345954bb3622b25dd13e06f9d367', 'versionType': 'git'}, {'status': 'affected', 'version': '0e4b8faaaebe3137bec5723ef2b3cb0437fb38fd', 'lessThan': '3baedc9b2f53e6a6ac57b16fdff0f9b954d9ca71', 'versionType': 'git'}, {'status': 'affected', 'version': 'f655467a9973f964b267871e5fef533ad5014494', 'lessThan': '21303c4a2b7275e626c6b67de0f45f2d5b9bb3e7', 'versionType': 'git'}, {'status': 'affected', 'version': '340cea84f691c5206561bb2e0147158fe02070be', 'lessThan': '7839f1817a0cb6c4ed5cfe25d04845c43380a129', 'versionType': 'git'}, {'status': 'affected', 'version': '340cea84f691c5206561bb2e0147158fe02070be', 'lessThan': '6d9a4aaaa8b2612b5ef9d581e2f286a458b71ee1', 'versionType': 'git'}, {'status': 'affected', 'version': '30afc6ea72cc6cf7c8d579e79b64232801c38d08', 'versionType': 'git'}, {'status': 'affected', 'version': '6.1.167', 'lessThan': '6.1.178', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.6.130', 'lessThan': '6.6.145', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.12.78', 'lessThan': '6.12.97', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.18.20', 'lessThan': '6.18.40', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.19.10', 'lessThan': '6.20', 'versionType': 'semver'}], 'programFiles': ['fs/smb/client/connect.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '7.0'}, {'status': 'unaffected', 'version': '0', 'lessThan': '7.0', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/smb/client/connect.c'], 'defaultStatus': 'affected'}] -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 15, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '708c276f516d27beaded7f372ac8111cee43926c', 'lessThan': '55fb9581986141659002264fdc75cef307811eb8', 'versionType': 'git'}, {'status': 'affected', 'version': '0629a1a187e424373364d681b42b101894bdb548', 'lessThan': '4465ebe67d89345954bb3622b25dd13e06f9d367', 'versionType': 'git'}, {'status': 'affected', 'version': '0e4b8faaaebe3137bec5723ef2b3cb0437fb38fd', 'lessThan': '3baedc9b2f53e6a6ac57b16fdff0f9b954d9ca71', 'versionType': 'git'}, {'status': 'affected', 'version': 'f655467a9973f964b267871e5fef533ad5014494', 'lessThan': '21303c4a2b7275e626c6b67de0f45f2d5b9bb3e7', 'versionType': 'git'}, {'status': 'affected', 'version': '340cea84f691c5206561bb2e0147158fe02070be', 'lessThan': '7839f1817a0cb6c4ed5cfe25d04845c43380a129', 'versionType': 'git'}, {'status': 'affected', 'version': '340cea84f691c5206561bb2e0147158fe02070be', 'lessThan': '6d9a4aaaa8b2612b5ef9d581e2f286a458b71ee1', 'versionType': 'git'}, {'status': 'affected', 'version': '30afc6ea72cc6cf7c8d579e79b64232801c38d08', 'versionType': 'git'}, {'status': 'affected', 'version': '6.1.167', 'lessThan': '6.1.178', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.6.130', 'lessThan': '6.6.145', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.12.78', 'lessThan': '6.12.97', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.18.20', 'lessThan': '6.18.40', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.19.10', 'lessThan': '6.20', 'versionType': 'semver'}], 'programFiles': ['fs/smb/client/connect.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '7.0'}, {'status': 'unaffected', 'version': '0', 'lessThan': '7.0', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/smb/client/connect.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: cifs: remove all cifs files before kill super Cifs files may be put into fileinfo_put_wq during umounting cifs. After umount done, cifsFileInfo_put_final is called, which cause following BUG: BUG: kernel NULL pointer dereference, address: 0000000000000000 ... [ 134.222152] list_lru_add+0x64/0x1a0 [ 134.222399] ? cifs_put_tcon+0x171/0x340 [cifs] [ 134.222772] d_lru_add+0x44/0x60 [ 134.222997] dput+0x1fc/0x210 [ 134.223213] cifsFileInfo_put_final+0x11a/0x140 [cifs] [ 134.223576] process_one_work+0x17c/0x320 [ 134.223843] worker_thread+0x188/0x280 [ 134.224084] ? __pfx_worker_thread+0x10/0x10 [ 134.224366] kthread+0xcc/0x100 [ 134.224576] ? __pfx_kthread+0x10/0x10 [ 134.224827] ret_from_fork+0x30/0x50 [ 134.225063] ? __pfx_kthread+0x10/0x10 [ 134.225328] ret_from_fork_asm+0x1b/0x30 This can be reproduce by following: unshare -n bash -c " mkdir -p ${CIFS_MNT} ip netns attach root 1 ip link add eth0 type veth peer veth0 netns root ip link set eth0 up ip -n root link set veth0 up ip addr add 192.168.0.2/24 dev eth0 ip -n root addr add 192.168.0.1/24 dev veth0 ip route add default via 192.168.0.1 dev eth0 ip netns exec root sysctl net.ipv4.ip_forward=1 ip netns exec root iptables -t nat -A POSTROUTING -s 192.168.0.2 -o ${DEV} -j MASQUERADE mount -t cifs ${CIFS_PATH} ${CIFS_MNT} -o vers=3.0,sec=ntlmssp,credentials=${CIFS_CRED},rsize=65536,wsize=65536,cache=none,echo_interval=1 touch ${CIFS_MNT}/a.txt ip netns exec root iptables -t nat -D POSTROUTING -s 192.168.0.2 -o ${DEV} -j MASQUERADE " umount ${CIFS_MNT} Added Reference https://git.kernel.org/stable/c/21303c4a2b7275e626c6b67de0f45f2d5b9bb3e7 Added Reference https://git.kernel.org/stable/c/3baedc9b2f53e6a6ac57b16fdff0f9b954d9ca71 Added Reference https://git.kernel.org/stable/c/4465ebe67d89345954bb3622b25dd13e06f9d367 Added Reference https://git.kernel.org/stable/c/55fb9581986141659002264fdc75cef307811eb8 Added Reference https://git.kernel.org/stable/c/6d9a4aaaa8b2612b5ef9d581e2f286a458b71ee1 Added Reference https://git.kernel.org/stable/c/7839f1817a0cb6c4ed5cfe25d04845c43380a129