122 lines
7.5 KiB
JSON
122 lines
7.5 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-23115",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-01-13T15:37:45.969Z",
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"datePublished": "2026-02-14T15:09:47.826Z",
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"dateUpdated": "2026-05-11T22:00:24.910Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-05-11T22:00:24.910Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nserial: Fix not set tty->port race condition\n\nRevert commit bfc467db60b7 (\"serial: remove redundant\ntty_port_link_device()\") because the tty_port_link_device() is not\nredundant: the tty->port has to be confured before we call\nuart_configure_port(), otherwise user-space can open console without TTY\nlinked to the driver.\n\nThis tty_port_link_device() was added explicitly to avoid this exact\nissue in commit fb2b90014d78 (\"tty: link tty and port before configuring\nit as console\"), so offending commit basically reverted the fix saying\nit is redundant without addressing the actual race condition presented\nthere.\n\nReproducible always as tty->port warning on Qualcomm SoC with most of\ndevices disabled, so with very fast boot, and one serial device being\nthe console:\n\n printk: legacy console [ttyMSM0] enabled\n printk: legacy console [ttyMSM0] enabled\n printk: legacy bootconsole [qcom_geni0] disabled\n printk: legacy bootconsole [qcom_geni0] disabled\n ------------[ cut here ]------------\n tty_init_dev: ttyMSM driver does not set tty->port. This would crash the kernel. Fix the driver!\n WARNING: drivers/tty/tty_io.c:1414 at tty_init_dev.part.0+0x228/0x25c, CPU#2: systemd/1\n Modules linked in: socinfo tcsrcc_eliza gcc_eliza sm3_ce fuse ipv6\n CPU: 2 UID: 0 PID: 1 Comm: systemd Tainted: G S 6.19.0-rc4-next-20260108-00024-g2202f4d30aa8 #73 PREEMPT\n Tainted: [S]=CPU_OUT_OF_SPEC\n Hardware name: Qualcomm Technologies, Inc. Eliza (DT)\n ...\n tty_init_dev.part.0 (drivers/tty/tty_io.c:1414 (discriminator 11)) (P)\n tty_open (arch/arm64/include/asm/atomic_ll_sc.h:95 (discriminator 3) drivers/tty/tty_io.c:2073 (discriminator 3) drivers/tty/tty_io.c:2120 (discriminator 3))\n chrdev_open (fs/char_dev.c:411)\n do_dentry_open (fs/open.c:962)\n vfs_open (fs/open.c:1094)\n do_open (fs/namei.c:4634)\n path_openat (fs/namei.c:4793)\n do_filp_open (fs/namei.c:4820)\n do_sys_openat2 (fs/open.c:1391 (discriminator 3))\n ...\n Starting Network Name Resolution...\n\nApparently the flow with this small Yocto-based ramdisk user-space is:\n\ndriver (qcom_geni_serial.c): user-space:\n============================ ===========\nqcom_geni_serial_probe()\n uart_add_one_port()\n serial_core_register_port()\n serial_core_add_one_port()\n uart_configure_port()\n register_console()\n |\n | open console\n | ...\n | tty_init_dev()\n | driver->ports[idx] is NULL\n |\n tty_port_register_device_attr_serdev()\n tty_port_link_device() <- set driver->ports[idx]"
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/tty/serial/serial_core.c"
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],
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"versions": [
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{
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"version": "bfc467db60b76c30ca1f7f02088a219b6d5b6e8c",
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"lessThan": "2501c49306238b54a2de0f93de43d50ab6e76c84",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "bfc467db60b76c30ca1f7f02088a219b6d5b6e8c",
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"lessThan": "32f37e57583f869140cff445feedeea8a5fea986",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/tty/serial/serial_core.c"
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],
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"versions": [
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{
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"version": "6.15",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "6.15",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.8",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.19",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.15",
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"versionEndExcluding": "6.18.8"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.15",
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"versionEndExcluding": "6.19"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/2501c49306238b54a2de0f93de43d50ab6e76c84"
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},
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{
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"url": "https://git.kernel.org/stable/c/32f37e57583f869140cff445feedeea8a5fea986"
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}
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],
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"title": "serial: Fix not set tty->port race condition",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |