CVE-2026-23292scsi: target: Fix recursive locking in __configfs_open_file()
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: scsi: target: Fix recursive locking in __configfs_open_file() In flush_write_buffer, &p->frag_sem is acquired and then the loaded store function is called, which, here, is target_core_item_dbroot_store(). This function called filp_open(), following which these functions were called (in reverse order), according to the call trace: down_read __configfs_open_file do_dentry_open vfs_open do_open path_openat do_filp_open file_open_name filp_open target_core_item_dbroot_store flush_write_buffer configfs_write_iter target_core_item_dbroot_store() tries to validate the new file path by trying to open the file path provided to it; however, in this case, the bug report shows: db_root: not a directory: /sys/kernel/config/target/dbroot indicating that the same configfs file was tried to be opened, on which it is currently working on. Thus, it is trying to acquire frag_sem semaphore of the same file of which it already holds the semaphore obtained in flush_write_buffer(), leading to acquiring the semaphore in a nested manner and a possibility of recursive locking. Fix this by modifying target_core_item_dbroot_store() to use kern_path() instead of filp_open() to avoid opening the file using filesystem-specific function __configfs_open_file(), and further modifying it to make this fix compatible.
- CVSS
- 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- 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 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from b0841eefd9693827afb9888235e26ddd098f9cef before 3161ef61f121d4573cad5b57c92188dcd9b284b3; from b0841eefd9693827afb9888235e26ddd098f9cef before e8ef82cb6443d5f3260b1b830e17f03dda4229ea; from b0841eefd9693827afb9888235e26ddd098f9cef before 4fcfa424a581d823cb1a9676e3eefe6ca17e453a; from b0841eefd9693827afb9888235e26ddd098f9cef before 9a5641024fbfd9b24fe65984ad85fea10a3ae438; from b0841eefd9693827afb9888235e26ddd098f9cef before 142eacb50fb903a4c10dee7e67b6e79ebb36a582; from b0841eefd9693827afb9888235e26ddd098f9cef before 14d4ac19d1895397532eec407433c5d74d9da53b; 49824b5c875087a52672b0c8e8ecbefe6f773532; 09e21253d17f53bdb5aac0e0dbd057a29fcbe8d1; and 4 more ranges | CNA record |
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 |
linux linux_kernel linux:linux_kernel | from 4.9.201 before 4.10; from 4.14.154 before 4.15; from 4.19.84 before 4.20; from 5.3.1 before 6.1.167; from 6.2 before 6.6.130; from 6.7 before 6.12.77; from 6.13 before 6.18.17; from 6.19 before 6.19.7; and 4 more ranges | NVD |
References
- https://git.kernel.org/stable/c/3161ef61f121d4573cad5b57c92188dcd9b284b3patch
- https://git.kernel.org/stable/c/e8ef82cb6443d5f3260b1b830e17f03dda4229eapatch
- https://git.kernel.org/stable/c/4fcfa424a581d823cb1a9676e3eefe6ca17e453apatch
- https://git.kernel.org/stable/c/9a5641024fbfd9b24fe65984ad85fea10a3ae438patch
- https://git.kernel.org/stable/c/142eacb50fb903a4c10dee7e67b6e79ebb36a582patch
- https://git.kernel.org/stable/c/14d4ac19d1895397532eec407433c5d74d9da53bpatch
- 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.