368 lines
18 KiB
JSON
368 lines
18 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-2021-47375",
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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": "2024-05-21T14:58:30.811Z",
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"datePublished": "2024-05-21T15:03:39.090Z",
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"dateUpdated": "2026-05-11T13:53:29.691Z"
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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": "2026-05-11T13:53:29.691Z"
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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\nblktrace: Fix uaf in blk_trace access after removing by sysfs\n\nThere is an use-after-free problem triggered by following process:\n\n P1(sda)\t\t\t\tP2(sdb)\n\t\t\techo 0 > /sys/block/sdb/trace/enable\n\t\t\t blk_trace_remove_queue\n\t\t\t synchronize_rcu\n\t\t\t blk_trace_free\n\t\t\t relay_close\nrcu_read_lock\n__blk_add_trace\n trace_note_tsk\n (Iterate running_trace_list)\n\t\t\t relay_close_buf\n\t\t\t\t relay_destroy_buf\n\t\t\t\t kfree(buf)\n trace_note(sdb's bt)\n relay_reserve\n buf->offset <- nullptr deference (use-after-free) !!!\nrcu_read_unlock\n\n[ 502.714379] BUG: kernel NULL pointer dereference, address:\n0000000000000010\n[ 502.715260] #PF: supervisor read access in kernel mode\n[ 502.715903] #PF: error_code(0x0000) - not-present page\n[ 502.716546] PGD 103984067 P4D 103984067 PUD 17592b067 PMD 0\n[ 502.717252] Oops: 0000 [#1] SMP\n[ 502.720308] RIP: 0010:trace_note.isra.0+0x86/0x360\n[ 502.732872] Call Trace:\n[ 502.733193] __blk_add_trace.cold+0x137/0x1a3\n[ 502.733734] blk_add_trace_rq+0x7b/0xd0\n[ 502.734207] blk_add_trace_rq_issue+0x54/0xa0\n[ 502.734755] blk_mq_start_request+0xde/0x1b0\n[ 502.735287] scsi_queue_rq+0x528/0x1140\n...\n[ 502.742704] sg_new_write.isra.0+0x16e/0x3e0\n[ 502.747501] sg_ioctl+0x466/0x1100\n\nReproduce method:\n ioctl(/dev/sda, BLKTRACESETUP, blk_user_trace_setup[buf_size=127])\n ioctl(/dev/sda, BLKTRACESTART)\n ioctl(/dev/sdb, BLKTRACESETUP, blk_user_trace_setup[buf_size=127])\n ioctl(/dev/sdb, BLKTRACESTART)\n\n echo 0 > /sys/block/sdb/trace/enable &\n // Add delay(mdelay/msleep) before kernel enters blk_trace_free()\n\n ioctl$SG_IO(/dev/sda, SG_IO, ...)\n // Enters trace_note_tsk() after blk_trace_free() returned\n // Use mdelay in rcu region rather than msleep(which may schedule out)\n\nRemove blk_trace from running_list before calling blk_trace_free() by\nsysfs if blk_trace is at Blktrace_running state."
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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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"kernel/trace/blktrace.c"
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],
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"versions": [
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{
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"version": "c71a896154119f4ca9e89d6078f5f63ad60ef199",
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"lessThan": "488da313edf3abea7f7733efe011c96b23740ab5",
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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": "c71a896154119f4ca9e89d6078f5f63ad60ef199",
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"lessThan": "dacfd5e4d1142bfb3809aab3634a375f6f373269",
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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": "c71a896154119f4ca9e89d6078f5f63ad60ef199",
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"lessThan": "d56171d9360c0170c5c5f8f7e2362a2e999eca40",
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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": "c71a896154119f4ca9e89d6078f5f63ad60ef199",
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"lessThan": "677e362ba807f3aafe6f405c07e0b37244da5222",
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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": "c71a896154119f4ca9e89d6078f5f63ad60ef199",
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"lessThan": "ebb8d26d93c3ec3c7576c52a8373a2309423c069",
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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": "c71a896154119f4ca9e89d6078f5f63ad60ef199",
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"lessThan": "3815fe7371d2411ce164281cef40d9fc7b323dee",
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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": "c71a896154119f4ca9e89d6078f5f63ad60ef199",
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"lessThan": "a5f8e86192612d0183047448d8bbe7918b3f1a26",
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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": "c71a896154119f4ca9e89d6078f5f63ad60ef199",
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"lessThan": "5afedf670caf30a2b5a52da96eb7eac7dee6a9c9",
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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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"kernel/trace/blktrace.c"
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],
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"versions": [
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{
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"version": "2.6.30",
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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": "2.6.30",
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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": "4.4.286",
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"lessThanOrEqual": "4.4.*",
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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": "4.9.285",
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"lessThanOrEqual": "4.9.*",
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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": "4.14.249",
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"lessThanOrEqual": "4.14.*",
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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": "4.19.209",
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"lessThanOrEqual": "4.19.*",
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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": "5.4.150",
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"lessThanOrEqual": "5.4.*",
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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": "5.10.70",
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"lessThanOrEqual": "5.10.*",
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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": "5.14.9",
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"lessThanOrEqual": "5.14.*",
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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": "5.15",
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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": "2.6.30",
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"versionEndExcluding": "4.4.286"
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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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"versionEndExcluding": "4.9.285"
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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/488da313edf3abea7f7733efe011c96b23740ab5"
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},
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{
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"url": "https://git.kernel.org/stable/c/dacfd5e4d1142bfb3809aab3634a375f6f373269"
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},
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{
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"url": "https://git.kernel.org/stable/c/d56171d9360c0170c5c5f8f7e2362a2e999eca40"
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},
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{
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"url": "https://git.kernel.org/stable/c/677e362ba807f3aafe6f405c07e0b37244da5222"
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},
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{
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"url": "https://git.kernel.org/stable/c/ebb8d26d93c3ec3c7576c52a8373a2309423c069"
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},
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{
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"url": "https://git.kernel.org/stable/c/3815fe7371d2411ce164281cef40d9fc7b323dee"
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},
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{
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"url": "https://git.kernel.org/stable/c/a5f8e86192612d0183047448d8bbe7918b3f1a26"
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},
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{
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"url": "https://git.kernel.org/stable/c/5afedf670caf30a2b5a52da96eb7eac7dee6a9c9"
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}
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],
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"title": "blktrace: Fix uaf in blk_trace access after removing by sysfs",
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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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"adp": [
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{
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"problemTypes": [
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{
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"descriptions": [
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{
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"type": "CWE",
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"cweId": "CWE-416",
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"lang": "en",
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"description": "CWE-416 Use After Free"
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}
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]
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"scope": "UNCHANGED",
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"version": "3.1",
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"baseScore": 6.2,
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"attackVector": "LOCAL",
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"baseSeverity": "MEDIUM",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
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"integrityImpact": "NONE",
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"userInteraction": "NONE",
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"attackComplexity": "LOW",
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"availabilityImpact": "NONE",
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"privilegesRequired": "NONE",
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"confidentialityImpact": "HIGH"
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}
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},
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2024-06-17T17:37:23.607827Z",
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"id": "CVE-2021-47375",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2024-10-27T13:59:18.148Z"
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}
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},
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{
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"providerMetadata": {
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"orgId": "af854a3a-2127-422b-91ae-364da2661108",
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"shortName": "CVE",
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"dateUpdated": "2024-08-04T05:32:08.654Z"
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},
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"title": "CVE Program Container",
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/488da313edf3abea7f7733efe011c96b23740ab5",
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} |