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vuln-cve/data/2026/90xxx/CVE-2026-90055.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-90055",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2026-09-11T19:38:34.783Z",
"datePublished": "2026-09-17T16:05:40.304Z",
"dateUpdated": "2026-10-19T08:57:12.606Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-10-19T08:57:12.606Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: atm: usbatm: fix invalid ci_range initialization\n\nsyzbot reported a shift-out-of-bounds in __vcc_connect():\n\n UBSAN: shift-out-of-bounds in net/atm/common.c:382:32\n shift exponent -1 is negative\n CPU: 0 UID: 0 PID: 5987 Comm: syz.0.18 Not tainted syzkaller #0 PREEMPT(full)\n Hardware name: Google Compute Engine/Google Compute Engine, BIOS Google 08/05/2026\n Call Trace:\n <TASK>\n dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120\n ubsan_epilogue+0xa/0x30 lib/ubsan.c:233\n __ubsan_handle_shift_out_of_bounds+0x36d/0x400 lib/ubsan.c:494\n __vcc_connect+0x14b4/0x19c0 net/atm/common.c:382\n vcc_connect+0x328/0x8f0 net/atm/common.c:498\n pvc_bind+0x272/0x380 net/atm/pvc.c:52\n __sys_bind+0x2e3/0x410 net/socket.c:1976\n __x64_sys_bind+0x7a/0x90 net/socket.c:1979\n ...\n\nATM device ci_range fields (vpi_bits and vci_bits) represent the\nnumber of bits supported for VPI and VCI addressing on the device.\nnet/atm/common.c directly uses these fields as bit shift counts:\n vpi >> dev->ci_range.vpi_bits\n vci >> dev->ci_range.vci_bits\n 1 << vcc->dev->ci_range.vpi_bits\n 1 << vcc->dev->ci_range.vci_bits\n\nusbatm_atm_init() sets ci_range.vpi_bits and ci_range.vci_bits to\nATM_CI_MAX (-1), which is defined in <uapi/linux/atmdev.h> as a\nsentinel value for userspace ATM_SETCIRANGE requests, not a valid bit\ncount. Shifting by -1 is undefined behavior and triggers UBSAN\nwarnings.\n\nATM UNI cell headers allow up to 8 bits for VPI (0..255) and 16 bits\nfor VCI (0..65535). Initialize vpi_bits to 8 and vci_bits to 16, as\ndone by solos-pci."
}
],
"affected": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/usb/atm/usbatm.c"
],
"versions": [
{
"version": "c59bba75fa500f13ef14215d599ee0d7faa1b954",
"lessThan": "8442586526c406527bf31206e538c0ce6bc672e6",
"status": "affected",
"versionType": "git"
},
{
"version": "c59bba75fa500f13ef14215d599ee0d7faa1b954",
"lessThan": "561cbd6d49022c9a383e22a39c87a165a4d39f9c",
"status": "affected",
"versionType": "git"
},
{
"version": "c59bba75fa500f13ef14215d599ee0d7faa1b954",
"lessThan": "76bc7c3a44856744b64aa91d9afe6d9522a78c42",
"status": "affected",
"versionType": "git"
},
{
"version": "c59bba75fa500f13ef14215d599ee0d7faa1b954",
"lessThan": "7baa0c92be39eb3da755ed6f200497a57078c47b",
"status": "affected",
"versionType": "git"
},
{
"version": "c59bba75fa500f13ef14215d599ee0d7faa1b954",
"lessThan": "1e964d414bfd9f8dfe9948d08e4b9dda4ed2e422",
"status": "affected",
"versionType": "git"
},
{
"version": "c59bba75fa500f13ef14215d599ee0d7faa1b954",
"lessThan": "ff7f77a234f7b74e5955a6e34fa74eca4c9ca44c",
"status": "affected",
"versionType": "git"
},
{
"version": "c59bba75fa500f13ef14215d599ee0d7faa1b954",
"lessThan": "75667703115154a4fd9cf259d4f826d8729cbcda",
"status": "affected",
"versionType": "git"
},
{
"version": "c59bba75fa500f13ef14215d599ee0d7faa1b954",
"lessThan": "a60fd8c6dbaa76da4163cf225ed2b9e982540f39",
"status": "affected",
"versionType": "git"
}
]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/usb/atm/usbatm.c"
],
"versions": [
{
"version": "2.6.13",
"status": "affected"
},
{
"version": "0",
"lessThan": "2.6.13",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.10.270",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.15.221",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.1.188",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.6.157",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.12.110",
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.18.52",
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "7.2.6",
"lessThanOrEqual": "7.2.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "7.3",
"lessThanOrEqual": "*",
"status": "unaffected",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.13",
"versionEndExcluding": "5.10.270"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.13",
"versionEndExcluding": "5.15.221"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.13",
"versionEndExcluding": "6.1.188"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.13",
"versionEndExcluding": "6.6.157"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.13",
"versionEndExcluding": "6.12.110"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.13",
"versionEndExcluding": "6.18.52"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.13",
"versionEndExcluding": "7.2.6"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.13",
"versionEndExcluding": "7.3"
}
]
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/8442586526c406527bf31206e538c0ce6bc672e6"
},
{
"url": "https://git.kernel.org/stable/c/561cbd6d49022c9a383e22a39c87a165a4d39f9c"
},
{
"url": "https://git.kernel.org/stable/c/76bc7c3a44856744b64aa91d9afe6d9522a78c42"
},
{
"url": "https://git.kernel.org/stable/c/7baa0c92be39eb3da755ed6f200497a57078c47b"
},
{
"url": "https://git.kernel.org/stable/c/1e964d414bfd9f8dfe9948d08e4b9dda4ed2e422"
},
{
"url": "https://git.kernel.org/stable/c/ff7f77a234f7b74e5955a6e34fa74eca4c9ca44c"
},
{
"url": "https://git.kernel.org/stable/c/75667703115154a4fd9cf259d4f826d8729cbcda"
},
{
"url": "https://git.kernel.org/stable/c/a60fd8c6dbaa76da4163cf225ed2b9e982540f39"
}
],
"title": "usb: atm: usbatm: fix invalid ci_range initialization",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
}
}