{"id":"DEBIAN-CVE-2025-21845","details":"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]","modified":"2026-08-27T23:05:12.151891241Z","published":"2025-03-12T10:15:16.820Z","upstream":["CVE-2025-21845"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2025-21845"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.12.17-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-21845.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.12.17-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-21845.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}