{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-53304", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.397Z", "datePublished": "2026-06-26T19:41:00.056Z", "dateUpdated": "2026-06-26T19:41:00.056Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-06-26T19:41:00.056Z" }, "descriptions": [ { "lang": "en", "value": "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." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/scsi/sg.c" ], "versions": [ { "version": "6460e75a104d10458817d2f5b2fbff775bf0b43a", "lessThan": "3d74e0654ac908c65a8f20373091826fe43b1363", "status": "affected", "versionType": "git" }, { "version": "6460e75a104d10458817d2f5b2fbff775bf0b43a", "lessThan": "c47ccfb3d80dfed522ca06a5954ac97488d78c5a", "status": "affected", "versionType": "git" }, { "version": "6460e75a104d10458817d2f5b2fbff775bf0b43a", "lessThan": "fe671d3c84ffb1b763d590c25195755adeaadaba", "status": "affected", "versionType": "git" }, { "version": "6460e75a104d10458817d2f5b2fbff775bf0b43a", "lessThan": "c5f4a211e82d04ccc1809311322c47023bbe66e2", "status": "affected", "versionType": "git" }, { "version": "6460e75a104d10458817d2f5b2fbff775bf0b43a", "lessThan": "9676ca7b1ef31a3a65b3e61e7ce3b54ce7364202", "status": "affected", "versionType": "git" }, { "version": "6460e75a104d10458817d2f5b2fbff775bf0b43a", "lessThan": "1afd963fcd963db0dc5d47df6dfcf010c9c4647e", "status": "affected", "versionType": "git" }, { "version": "6460e75a104d10458817d2f5b2fbff775bf0b43a", "lessThan": "feade299e932967de27519338d41de348fb5b061", "status": "affected", "versionType": "git" }, { "version": "6460e75a104d10458817d2f5b2fbff775bf0b43a", "lessThan": "d06a310b45e153872033dd0cf19d5a2279121099", "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/scsi/sg.c" ], "versions": [ { "version": "2.6.19", "status": "affected" }, { "version": "0", "lessThan": "2.6.19", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.258", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.209", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.175", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.141", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.91", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.33", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.0.10", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1", "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": "2.6.19", "versionEndExcluding": "5.10.258" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.19", "versionEndExcluding": "5.15.209" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.19", "versionEndExcluding": "6.1.175" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.19", "versionEndExcluding": "6.6.141" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.19", "versionEndExcluding": "6.12.91" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.19", "versionEndExcluding": "6.18.33" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.19", "versionEndExcluding": "7.0.10" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.19", "versionEndExcluding": "7.1" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/3d74e0654ac908c65a8f20373091826fe43b1363" }, { "url": "https://git.kernel.org/stable/c/c47ccfb3d80dfed522ca06a5954ac97488d78c5a" }, { "url": "https://git.kernel.org/stable/c/fe671d3c84ffb1b763d590c25195755adeaadaba" }, { "url": "https://git.kernel.org/stable/c/c5f4a211e82d04ccc1809311322c47023bbe66e2" }, { "url": "https://git.kernel.org/stable/c/9676ca7b1ef31a3a65b3e61e7ce3b54ce7364202" }, { "url": "https://git.kernel.org/stable/c/1afd963fcd963db0dc5d47df6dfcf010c9c4647e" }, { "url": "https://git.kernel.org/stable/c/feade299e932967de27519338d41de348fb5b061" }, { "url": "https://git.kernel.org/stable/c/d06a310b45e153872033dd0cf19d5a2279121099" } ], "title": "scsi: sg: Resolve soft lockup issue when opening /dev/sgX", "x_generator": { "engine": "bippy-1.2.0" } } } }