| { |
| "containers": { |
| "cna": { |
| "providerMetadata": { |
| "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038" |
| }, |
| "descriptions": [ |
| { |
| "lang": "en", |
| "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nubifs: Fix read out-of-bounds in ubifs_wbuf_write_nolock()\n\nFunction ubifs_wbuf_write_nolock() may access buf out of bounds in\nfollowing process:\n\nubifs_wbuf_write_nolock():\n aligned_len = ALIGN(len, 8); // Assume len = 4089, aligned_len = 4096\n if (aligned_len <= wbuf->avail) ... // Not satisfy\n if (wbuf->used) {\n ubifs_leb_write() // Fill some data in avail wbuf\n len -= wbuf->avail; // len is still not 8-bytes aligned\n aligned_len -= wbuf->avail;\n }\n n = aligned_len >> c->max_write_shift;\n if (n) {\n n <<= c->max_write_shift;\n err = ubifs_leb_write(c, wbuf->lnum, buf + written,\n wbuf->offs, n);\n // n > len, read out of bounds less than 8(n-len) bytes\n }\n\n, which can be catched by KASAN:\n =========================================================\n BUG: KASAN: slab-out-of-bounds in ecc_sw_hamming_calculate+0x1dc/0x7d0\n Read of size 4 at addr ffff888105594ff8 by task kworker/u8:4/128\n Workqueue: writeback wb_workfn (flush-ubifs_0_0)\n Call Trace:\n kasan_report.cold+0x81/0x165\n nand_write_page_swecc+0xa9/0x160\n ubifs_leb_write+0xf2/0x1b0 [ubifs]\n ubifs_wbuf_write_nolock+0x421/0x12c0 [ubifs]\n write_head+0xdc/0x1c0 [ubifs]\n ubifs_jnl_write_inode+0x627/0x960 [ubifs]\n wb_workfn+0x8af/0xb80\n\nFunction ubifs_wbuf_write_nolock() accepts that parameter 'len' is not 8\nbytes aligned, the 'len' represents the true length of buf (which is\nallocated in 'ubifs_jnl_xxx', eg. ubifs_jnl_write_inode), so\nubifs_wbuf_write_nolock() must handle the length read from 'buf' carefully\nto write leb safely.\n\nFetch a reproducer in [Link]." |
| } |
| ], |
| "affected": [ |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "unaffected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "fs/ubifs/io.c" |
| ], |
| "versions": [ |
| { |
| "version": "1e51764a3c2ac05a23a22b2a95ddee4d9bffb16d", |
| "lessThan": "5343575aa11c5d7044107d59d43f84aec01312b0", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "1e51764a3c2ac05a23a22b2a95ddee4d9bffb16d", |
| "lessThan": "b80ccbec0e4804436c382d7dd60e943c386ed83a", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "1e51764a3c2ac05a23a22b2a95ddee4d9bffb16d", |
| "lessThan": "07a209fadee7b53b46858538e1177597273862e4", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "1e51764a3c2ac05a23a22b2a95ddee4d9bffb16d", |
| "lessThan": "a7054aaf1909cf40489c0ec1b728fdcf79c751a6", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "1e51764a3c2ac05a23a22b2a95ddee4d9bffb16d", |
| "lessThan": "e09fa5318d51f522e1af4fbaf8f74999355980c8", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "1e51764a3c2ac05a23a22b2a95ddee4d9bffb16d", |
| "lessThan": "3b7fb89135a20587d57f8877c02e25003e9edbdf", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "1e51764a3c2ac05a23a22b2a95ddee4d9bffb16d", |
| "lessThan": "4f2262a334641e05f645364d5ade1f565c85f20b", |
| "status": "affected", |
| "versionType": "git" |
| } |
| ] |
| }, |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "affected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "fs/ubifs/io.c" |
| ], |
| "versions": [ |
| { |
| "version": "2.6.27", |
| "status": "affected" |
| }, |
| { |
| "version": "0", |
| "lessThan": "2.6.27", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "4.19.238", |
| "lessThanOrEqual": "4.19.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.4.189", |
| "lessThanOrEqual": "5.4.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.10.110", |
| "lessThanOrEqual": "5.10.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.15.33", |
| "lessThanOrEqual": "5.15.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.16.19", |
| "lessThanOrEqual": "5.16.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.17.2", |
| "lessThanOrEqual": "5.17.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.18", |
| "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": "2.6.27", |
| "versionEndExcluding": "4.19.238" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
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| }, |
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| }, |
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| "versionStartIncluding": "2.6.27", |
| "versionEndExcluding": "5.15.33" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "2.6.27", |
| "versionEndExcluding": "5.16.19" |
| }, |
| { |
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| "versionStartIncluding": "2.6.27", |
| "versionEndExcluding": "5.17.2" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
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| "versionEndExcluding": "5.18" |
| } |
| ] |
| } |
| ] |
| } |
| ], |
| "references": [ |
| { |
| "url": "https://git.kernel.org/stable/c/5343575aa11c5d7044107d59d43f84aec01312b0" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/b80ccbec0e4804436c382d7dd60e943c386ed83a" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/07a209fadee7b53b46858538e1177597273862e4" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/a7054aaf1909cf40489c0ec1b728fdcf79c751a6" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/e09fa5318d51f522e1af4fbaf8f74999355980c8" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/3b7fb89135a20587d57f8877c02e25003e9edbdf" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/4f2262a334641e05f645364d5ade1f565c85f20b" |
| } |
| ], |
| "title": "ubifs: Fix read out-of-bounds in ubifs_wbuf_write_nolock()", |
| "x_generator": { |
| "engine": "bippy-1.2.0" |
| } |
| } |
| }, |
| "cveMetadata": { |
| "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038", |
| "cveID": "CVE-2021-47636", |
| "requesterUserId": "gregkh@kernel.org", |
| "serial": "1", |
| "state": "PUBLISHED" |
| }, |
| "dataType": "CVE_RECORD", |
| "dataVersion": "5.0" |
| } |
