CVE-2026-23032: Linux

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: null_blk: fix kmemleak by releasing references to fault configfs items When CONFIG_BLK_DEV_NULL_BLK_FAULT_INJECTION is enabled, the null-blk driver sets up fault injection support by creating the timeout_inject, requeue_inject, and init_hctx_fault_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 init_hctx_fault_ 69 6e 6a 65 63 74 00 88 00 00 00 00 00 00 00 00 inject.......... backtrace (crc 1a018c86): __kmalloc_node_track_caller_noprof+0x494/0xbd8 kvasprintf+0x74/0xf4 config_item_set_name+0xf0/0x104 config_group_init_type_name+0x48/0xfc fault_config_init+0x48/0xf0 0xc0080000180559e4 configfs_mkdir+0x304/0x814 vfs_mkdir+0x49c/0x604 do_mkdirat+0x314/0x3d0 sys_mkdir+0xa0/0xd8 system_call_exception+0x1b0/0x4f0 system_call_vectored_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.

Засегнати продукти

• Linux Linux: bb4c19e030f45c5416f1eb4daa94fbaf7165e9ea преди 1a3286edf4d48ce37f8982ff3c3b65159a5ecbb2; bb4c19e030f45c5416f1eb4daa94fbaf7165e9ea преди d59ba448ccd595d5d65e197216cf781a87db2b28; bb4c19e030f45c5416f1eb4daa94fbaf7165e9ea преди f1718da051282698aa8fa150bebb9724f6389fda; bb4c19e030f45c5416f1eb4daa94fbaf7165e9ea преди 40b94ec7edbbb867c4e26a1a43d2b898f04b93c5
• Linux Linux: 6.4; преди 6.4; 6.6.122 до 6.6.*; 6.12.67 до 6.12.*; 6.18.7 до 6.18.*; от 6.19 нататък
• Siemens RUGGEDCOM RST2428P: преди V4.0

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99268
• CVE-2026-99266
• CVE-2026-99267

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-23032
• https://nvd.nist.gov/vuln/detail/CVE-2026-23032
• https://git.kernel.org/stable/c/1a3286edf4d48ce37f8982ff3c3b65159a5ecbb2
• https://git.kernel.org/stable/c/d59ba448ccd595d5d65e197216cf781a87db2b28
• https://git.kernel.org/stable/c/f1718da051282698aa8fa150bebb9724f6389fda
• https://git.kernel.org/stable/c/40b94ec7edbbb867c4e26a1a43d2b898f04b93c5
• https://cert-portal.siemens.com/productcert/html/ssa-253495.html