{"cve":{"cve_id":"CVE-2026-53304","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":null,"epss_percentile":null,"epss_as_of":null,"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: sg: Resolve soft lockup issue when opening /dev/sgX\n\nThe parameter def_reserved_size defines the default buffer size reserved\nfor each Sg_fd and should be restricted to a range between 0 and 1,048,576\n(see https://tldp.org/HOWTO/SCSI-Generic-HOWTO/proc.html).  Although the\nfunction sg_proc_write_dressz enforces this limit, it is possible to bypass\nit by directly modifying the module parameter as shown below, which then\ncauses a soft lockup:\n\necho -1 > /sys/module/sg/parameters/def_reserved_size\nexec 4<> /dev/sg0\n\nwatchdog: BUG: soft lockup - CPU#5 stuck for 26 seconds! [bash:537]\nModules loaded:\nCPU: 5 UID: 0 PID: 537 Command: bash, kernel version 6.19.0-rc3+ #134,\nPREEMPT disabled\nHardware: QEMU Standard PC (i440FX + PIIX, 1996), BIOS version\n1.16.1-2.fc37 dated 04/01/2014\n...\nCall Trace:\n\n  sg_build_reserve+0x5c/0xa0\n  sg_add_sfp+0x168/0x270\n  sg_open+0x16e/0x340\n  chrdev_open+0xbe/0x230\n  do_dentry_open+0x175/0x480\n  vfs_open+0x34/0xf0\n  do_open+0x265/0x3d0\n  path_openat+0x110/0x290\n  do_filp_open+0xc3/0x170\n  do_sys_openat2+0x71/0xe0\n  __x64_sys_openat+0x6d/0xa0\n  do_syscall_64+0x62/0x310\n  entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\nThe fix is to use module_param_cb to validate and reject invalid values\nassigned to def_reserved_size.","published_at":"2026-06-26T19:41:00.056000Z","last_modified_at":null,"cvss_v3_score":null,"cvss_v3_vector":null,"cvss_v3_severity":null,"cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":null,"nvd_references":["https://git.kernel.org/stable/c/3d74e0654ac908c65a8f20373091826fe43b1363","https://git.kernel.org/stable/c/c47ccfb3d80dfed522ca06a5954ac97488d78c5a","https://git.kernel.org/stable/c/fe671d3c84ffb1b763d590c25195755adeaadaba","https://git.kernel.org/stable/c/c5f4a211e82d04ccc1809311322c47023bbe66e2","https://git.kernel.org/stable/c/9676ca7b1ef31a3a65b3e61e7ce3b54ce7364202","https://git.kernel.org/stable/c/1afd963fcd963db0dc5d47df6dfcf010c9c4647e","https://git.kernel.org/stable/c/feade299e932967de27519338d41de348fb5b061","https://git.kernel.org/stable/c/d06a310b45e153872033dd0cf19d5a2279121099"],"vuln_status":null,"trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-28T17:55:28.590503Z","updated_at":"2026-06-28T23:30:52.348775Z"},"effective_severity":null,"badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":null,"metrics":[]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6460e75a104d10458817d2f5b2fbff775bf0b43a","version_start_inclusive":true,"version_end":"3d74e0654ac908c65a8f20373091826fe43b1363","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:6460e75a104d10458817d2f5b2fbff775bf0b43a:3d74e0654ac908c65a8f20373091826fe43b1363"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6460e75a104d10458817d2f5b2fbff775bf0b43a","version_start_inclusive":true,"version_end":"c47ccfb3d80dfed522ca06a5954ac97488d78c5a","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:6460e75a104d10458817d2f5b2fbff775bf0b43a:c47ccfb3d80dfed522ca06a5954ac97488d78c5a"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6460e75a104d10458817d2f5b2fbff775bf0b43a","version_start_inclusive":true,"version_end":"fe671d3c84ffb1b763d590c25195755adeaadaba","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:6460e75a104d10458817d2f5b2fbff775bf0b43a:fe671d3c84ffb1b763d590c25195755adeaadaba"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6460e75a104d10458817d2f5b2fbff775bf0b43a","version_start_inclusive":true,"version_end":"c5f4a211e82d04ccc1809311322c47023bbe66e2","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:6460e75a104d10458817d2f5b2fbff775bf0b43a:c5f4a211e82d04ccc1809311322c47023bbe66e2"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6460e75a104d10458817d2f5b2fbff775bf0b43a","version_start_inclusive":true,"version_end":"9676ca7b1ef31a3a65b3e61e7ce3b54ce7364202","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:6460e75a104d10458817d2f5b2fbff775bf0b43a:9676ca7b1ef31a3a65b3e61e7ce3b54ce7364202"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6460e75a104d10458817d2f5b2fbff775bf0b43a","version_start_inclusive":true,"version_end":"1afd963fcd963db0dc5d47df6dfcf010c9c4647e","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:6460e75a104d10458817d2f5b2fbff775bf0b43a:1afd963fcd963db0dc5d47df6dfcf010c9c4647e"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6460e75a104d10458817d2f5b2fbff775bf0b43a","version_start_inclusive":true,"version_end":"feade299e932967de27519338d41de348fb5b061","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:6460e75a104d10458817d2f5b2fbff775bf0b43a:feade299e932967de27519338d41de348fb5b061"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6460e75a104d10458817d2f5b2fbff775bf0b43a","version_start_inclusive":true,"version_end":"d06a310b45e153872033dd0cf19d5a2279121099","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:6460e75a104d10458817d2f5b2fbff775bf0b43a:d06a310b45e153872033dd0cf19d5a2279121099"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"2.6.19","version_start_inclusive":true,"version_end":"2.6.19","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:2.6.19:2.6.19"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"0","version_start_inclusive":true,"version_end":"2.6.19","version_end_inclusive":false,"cpe23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published","source":null}]}