CVE-2024-47809dlm: fix possible lkb_resource null dereference
Updated under an hour ago ()
Does this affect you?
It affects Linux and 5 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
In the Linux kernel, the following vulnerability has been resolved: dlm: fix possible lkb_resource null dereference This patch fixes a possible null pointer dereference when this function is called from request_lock() as lkb->lkb_resource is not assigned yet, only after validate_lock_args() by calling attach_lkb(). Another issue is that a resource name could be a non printable bytearray and we cannot assume to be ASCII coded. The log functionality is probably never being hit when DLM is used in normal way and no debug logging is enabled. The null pointer dereference can only occur on a new created lkb that does not have the resource assigned yet, it probably never hits the null pointer dereference but we should be sure that other changes might not change this behaviour and we actually can hit the mentioned null pointer dereference. In this patch we just drop the printout of the resource name, the lkb id is enough to make a possible connection to a resource name if this exists.
- CVSS
- 5.5 MEDIUM (v3.1, CISA ADP)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-476
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 15, 2026
Affected products
Linux Linux linux:linux (from the name) | from 43279e5376017c40b4be9af5bc79cbb4ef6f53d7 before e1ffea6bec96d4349dbfcc42ad3e436259f64243; 43279e5376017c40b4be9af5bc79cbb4ef6f53d7 builds before 8d55ce46dd543c6965970ce70c22c3076dd35b1e; 43279e5376017c40b4be9af5bc79cbb4ef6f53d7 builds before 6fbdc3980b70e9c1c86eccea7d5ee68108008fa7; 43279e5376017c40b4be9af5bc79cbb4ef6f53d7 builds before 2db11504ef82a60c1a2063ba7431a5cd013ecfcb; from 43279e5376017c40b4be9af5bc79cbb4ef6f53d7 before b98333c67daf887c724cd692e88e2db9418c0861 | CNA record |
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name) | all versions | CISA ADP |
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
linux linux_kernel linux:linux_kernel | before 6.6.66; from 6.7 before 6.12.5 | NVD |
References
- https://git.kernel.org/stable/c/e1ffea6bec96d4349dbfcc42ad3e436259f64243
- https://git.kernel.org/stable/c/8d55ce46dd543c6965970ce70c22c3076dd35b1e
- https://git.kernel.org/stable/c/6fbdc3980b70e9c1c86eccea7d5ee68108008fa7patch
- https://git.kernel.org/stable/c/2db11504ef82a60c1a2063ba7431a5cd013ecfcbpatch
- https://git.kernel.org/stable/c/b98333c67daf887c724cd692e88e2db9418c0861patch
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.