Vulnerability Details : CVE-2019-9857
In the Linux kernel through 5.0.2, the function inotify_update_existing_watch() in fs/notify/inotify/inotify_user.c neglects to call fsnotify_put_mark() with IN_MASK_CREATE after fsnotify_find_mark(), which will cause a memory leak (aka refcount leak). Finally, this will cause a denial of service.
Vulnerability category: Denial of service
Products affected by CVE-2019-9857
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2019-9857
0.07%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 19 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2019-9857
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.9
|
MEDIUM | AV:L/AC:L/Au:N/C:N/I:N/A:C |
3.9
|
6.9
|
NIST | |
|
5.5
|
MEDIUM | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
1.8
|
3.6
|
NIST |
CWE ids for CVE-2019-9857
-
The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.Assigned by: nvd@nist.gov (Primary)
References for CVE-2019-9857
-
https://security.netapp.com/advisory/ntap-20190404-0002/
March 27th 2019 Linux Kernel Vulnerabilities in NetApp Products | NetApp Product Security
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NXLZ2V2ES37A3J7DMK4MZYIWV2LEZFLM/
[SECURITY] Fedora 28 Update: kernel-tools-5.0.6-100.fc28 - package-announce - Fedora Mailing-Lists
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PPH3B7FJOMWD5JWUPZKB6T44KNT4PX2L/
[SECURITY] Fedora 29 Update: kernel-5.0.6-200.fc29 - package-announce - Fedora Mailing-Lists
-
http://www.securityfocus.com/bid/107527
Linux kernel 'fs/notify/inotify/inotify_user.c' Local Denial of Service VulnerabilityThird Party Advisory;VDB Entry
-
https://patchwork.kernel.org/patch/10836283/
inotify: Fix fsnotify_mark refcount leak in inotify_update_existing_watch() - PatchworkPatch;Vendor Advisory
-
https://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs.git/commit/?h=fsnotify&id=62c9d2674b31d4c8a674bee86b7edc6da2803aea
kernel/git/jack/linux-fs.git - Ext2/3, UDF, quota treePatch;Vendor Advisory
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