CVE-2026-23032
- Source
- https://cve.org/CVERecord?id=CVE-2026-23032
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-23032.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2026-23032
- Downstream
- Published
- 2026-01-31T11:42:11.640Z
- Modified
- 2026-02-10T08:28:39.023812Z
- Summary
- null_blk: fix kmemleak by releasing references to fault configfs items
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
null_blk: fix kmemleak by releasing references to fault configfs items
When CONFIGBLKDEVNULLBLKFAULTINJECTION is enabled, the null-blk driver sets up fault injection support by creating the timeoutinject, requeueinject, and inithctxfault_inject configfs items as children of the top-level nullbX configfs group.
However, when the nullbX device is removed, the references taken to these fault-config configfs items are not released. As a result, kmemleak reports a memory leak, for example:
unreferenced object 0xc00000021ff25c40 (size 32): comm "mkdir", pid 10665, jiffies 4322121578 hex dump (first 32 bytes): 69 6e 69 74 5f 68 63 74 78 5f 66 61 75 6c 74 5f inithctxfault_ 69 6e 6a 65 63 74 00 88 00 00 00 00 00 00 00 00 inject.......... backtrace (crc 1a018c86): _kmallocnodetrackcallernoprof+0x494/0xbd8 kvasprintf+0x74/0xf4 configitemsetname+0xf0/0x104 configgroupinittypename+0x48/0xfc faultconfiginit+0x48/0xf0 0xc0080000180559e4 configfsmkdir+0x304/0x814 vfsmkdir+0x49c/0x604 domkdirat+0x314/0x3d0 sysmkdir+0xa0/0xd8 systemcallexception+0x1b0/0x4f0 systemcallvectored_common+0x15c/0x2ec
Fix this by explicitly releasing the references to the fault-config configfs items when dropping the reference to the top-level nullbX configfs group.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23032.json" }- References
-
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/1a3286edf4d48ce37f8982ff3c3b65159a5ecbb2
- https://git.kernel.org/stable/c/40b94ec7edbbb867c4e26a1a43d2b898f04b93c5
- https://git.kernel.org/stable/c/d59ba448ccd595d5d65e197216cf781a87db2b28
- https://git.kernel.org/stable/c/f1718da051282698aa8fa150bebb9724f6389fda
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23032.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-23032
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedbb4c19e030f45c5416f1eb4daa94fbaf7165e9eaFixed1a3286edf4d48ce37f8982ff3c3b65159a5ecbb2Fixedd59ba448ccd595d5d65e197216cf781a87db2b28Fixedf1718da051282698aa8fa150bebb9724f6389fdaFixed40b94ec7edbbb867c4e26a1a43d2b898f04b93c5