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CVE-2025-21845— mtd: spi-nor: sst: Fix SST write failure

EPSS 0.03% · P8
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I. Basic Information for CVE-2025-21845

Vulnerability Information
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Vulnerability Title
mtd: spi-nor: sst: Fix SST write failure
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: mtd: spi-nor: sst: Fix SST write failure 'commit 18bcb4aa54ea ("mtd: spi-nor: sst: Factor out common write operation to `sst_nor_write_data()`")' introduced a bug where only one byte of data is written, regardless of the number of bytes passed to sst_nor_write_data(), causing a kernel crash during the write operation. Ensure the correct number of bytes are written as passed to sst_nor_write_data(). Call trace: [ 57.400180] ------------[ cut here ]------------ [ 57.404842] While writing 2 byte written 1 bytes [ 57.409493] WARNING: CPU: 0 PID: 737 at drivers/mtd/spi-nor/sst.c:187 sst_nor_write_data+0x6c/0x74 [ 57.418464] Modules linked in: [ 57.421517] CPU: 0 UID: 0 PID: 737 Comm: mtd_debug Not tainted 6.12.0-g5ad04afd91f9 #30 [ 57.429517] Hardware name: Xilinx Versal A2197 Processor board revA - x-prc-02 revA (DT) [ 57.437600] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 57.444557] pc : sst_nor_write_data+0x6c/0x74 [ 57.448911] lr : sst_nor_write_data+0x6c/0x74 [ 57.453264] sp : ffff80008232bb40 [ 57.456570] x29: ffff80008232bb40 x28: 0000000000010000 x27: 0000000000000001 [ 57.463708] x26: 000000000000ffff x25: 0000000000000000 x24: 0000000000000000 [ 57.470843] x23: 0000000000010000 x22: ffff80008232bbf0 x21: ffff000816230000 [ 57.477978] x20: ffff0008056c0080 x19: 0000000000000002 x18: 0000000000000006 [ 57.485112] x17: 0000000000000000 x16: 0000000000000000 x15: ffff80008232b580 [ 57.492246] x14: 0000000000000000 x13: ffff8000816d1530 x12: 00000000000004a4 [ 57.499380] x11: 000000000000018c x10: ffff8000816fd530 x9 : ffff8000816d1530 [ 57.506515] x8 : 00000000fffff7ff x7 : ffff8000816fd530 x6 : 0000000000000001 [ 57.513649] x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000000 [ 57.520782] x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff0008049b0000 [ 57.527916] Call trace: [ 57.530354] sst_nor_write_data+0x6c/0x74 [ 57.534361] sst_nor_write+0xb4/0x18c [ 57.538019] mtd_write_oob_std+0x7c/0x88 [ 57.541941] mtd_write_oob+0x70/0xbc [ 57.545511] mtd_write+0x68/0xa8 [ 57.548733] mtdchar_write+0x10c/0x290 [ 57.552477] vfs_write+0xb4/0x3a8 [ 57.555791] ksys_write+0x74/0x10c [ 57.559189] __arm64_sys_write+0x1c/0x28 [ 57.563109] invoke_syscall+0x54/0x11c [ 57.566856] el0_svc_common.constprop.0+0xc0/0xe0 [ 57.571557] do_el0_svc+0x1c/0x28 [ 57.574868] el0_svc+0x30/0xcc [ 57.577921] el0t_64_sync_handler+0x120/0x12c [ 57.582276] el0t_64_sync+0x190/0x194 [ 57.585933] ---[ end trace 0000000000000000 ]--- [pratyush@kernel.org: add Cc stable tag]
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于SST写入失败，可能导致内核崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux 18bcb4aa54eab75dce41e5c176a1c2bff94f0f79 ~ bb1accc7e0f688886f0c634f2e878b8ac4ee6a58 -
LinuxLinux 6.12 -

II. Public POCs for CVE-2025-21845

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III. Intelligence Information for CVE-2025-21845

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Same Patch Batch · Linux · 2025-03-12 · 26 CVEs total

CVE-2025-21855ibmvnic: Don't reference skb after sending to VIOS
CVE-2024-58087ksmbd: fix racy issue from session lookup and expire
CVE-2024-58088bpf: Fix deadlock when freeing cgroup storage
CVE-2024-58089btrfs: fix double accounting race when btrfs_run_delalloc_range() failed
CVE-2025-21844smb: client: Add check for next_buffer in receive_encrypted_standard()
CVE-2025-21846acct: perform last write from workqueue
CVE-2025-21848nfp: bpf: Add check for nfp_app_ctrl_msg_alloc()
CVE-2025-21847ASoC: SOF: stream-ipc: Check for cstream nullity in sof_ipc_msg_data()
CVE-2025-21849drm/i915/gt: Use spin_lock_irqsave() in interruptible context
CVE-2025-21851bpf: Fix softlockup in arena_map_free on 64k page kernel
CVE-2025-21850nvmet: Fix crash when a namespace is disabled
CVE-2025-21852net: Add rx_skb of kfree_skb to raw_tp_null_args[].
CVE-2025-21853bpf: avoid holding freeze_mutex during mmap operation
CVE-2025-21866powerpc/code-patching: Fix KASAN hit by not flagging text patching area as VM_ALLOC
CVE-2025-21854sockmap, vsock: For connectible sockets allow only connected
CVE-2025-21856s390/ism: add release function for struct device
CVE-2025-21857net/sched: cls_api: fix error handling causing NULL dereference
CVE-2025-21858geneve: Fix use-after-free in geneve_find_dev().
CVE-2025-21859USB: gadget: f_midi: f_midi_complete to call queue_work
CVE-2025-21861mm/migrate_device: don't add folio to be freed to LRU in migrate_device_finalize()

Showing top 20 of 26 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-21845

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