{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2026-90055", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-90055", "idYear": 2026, "status": "PUBLISHED", "publishedAt": "2026-09-17T16:05:40.304Z", "updatedAt": "2026-10-19T08:57:12.606Z", "importedAt": "2026-10-24T01:58:35.090Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "usb: atm: usbatm: fix invalid ci_range initialization", "summary": "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 \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 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": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "c59bba75fa500f13ef14215d599ee0d7faa1b954", "status": "affected", "versionType": "git", "lessThan": "8442586526c406527bf31206e538c0ce6bc672e6" }, { "version": "c59bba75fa500f13ef14215d599ee0d7faa1b954", "status": "affected", "versionType": "git", "lessThan": "561cbd6d49022c9a383e22a39c87a165a4d39f9c" }, { "version": "c59bba75fa500f13ef14215d599ee0d7faa1b954", "status": "affected", "versionType": "git", "lessThan": "76bc7c3a44856744b64aa91d9afe6d9522a78c42" }, { "version": "c59bba75fa500f13ef14215d599ee0d7faa1b954", "status": "affected", "versionType": "git", "lessThan": "7baa0c92be39eb3da755ed6f200497a57078c47b" }, { "version": "c59bba75fa500f13ef14215d599ee0d7faa1b954", "status": "affected", "versionType": "git", "lessThan": "1e964d414bfd9f8dfe9948d08e4b9dda4ed2e422" }, { "version": "c59bba75fa500f13ef14215d599ee0d7faa1b954", "status": "affected", "versionType": "git", "lessThan": "ff7f77a234f7b74e5955a6e34fa74eca4c9ca44c" }, { "version": "c59bba75fa500f13ef14215d599ee0d7faa1b954", "status": "affected", "versionType": "git", "lessThan": "75667703115154a4fd9cf259d4f826d8729cbcda" }, { "version": "c59bba75fa500f13ef14215d599ee0d7faa1b954", "status": "affected", "versionType": "git", "lessThan": "a60fd8c6dbaa76da4163cf225ed2b9e982540f39" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "2.6.13", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "2.6.13" }, { "version": "5.10.270", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.221", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.188", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.157", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.110", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.18.52", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.18.*" }, { "version": "7.2.6", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "7.2.*" }, { "version": "7.3", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }