185 lines
9.9 KiB
JSON
185 lines
9.9 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-2026-93235",
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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": "2026-09-17T16:02:15.095Z",
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"datePublished": "2026-09-24T15:33:33.241Z",
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"dateUpdated": "2026-10-19T09:07:46.831Z"
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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": "2026-10-19T09:07:46.831Z"
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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\nf2fs: fix to zero post-EOF data when extending file size\n\ngeneric/794 4s ... - output mismatch (see /share/git/fstests/results//generic/794.out.bad)\n --- tests/generic/794.out 2026-06-12 08:46:32.766426241 +0800\n +++ /share/git/fstests/results//generic/794.out.bad 2026-07-05 18:32:55.000000000 +0800\n @@ -1,4 +1,16 @@\n QA output created by 794\n append_write\n +FAIL: non-zero data in gap [4080,4096) after shutdown+remount\n +000000 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a >ZZZZZZZZZZZZZZZZ<\n +*\n +001000\n truncate_up\n ...\n (Run 'diff -u /share/git/fstests/tests/generic/794.out /share/git/fstests/results//generic/794.out.bad' to see the entire diff)\nRan: generic/794\nFailures: generic/794\nFailed 1 of 1 tests\n\nSteps of generic/794:\n1. write 4096 bytes to file w/ 0x5a\n2. use fiemap to get PBA of first block in file\n3. truncate file to 4080\n4. umount; write 4096 bytes to file w/ 0x5a directly via PBA; mount\n5. extend filesize via\n a) append 4096 from offset 4096, or\n b) truncate 8192, or\n c) fallocate 4096 from offset 4096\n6. verify the gap is zeroed in memory [4080,4096)\n7. sync range 4096 from offset 4096; shutdown -f (flush meta before shutdown)\n8. umount; mount; verify [4080,4096) is zeroed or not.\n\nWhen extending file size (e.g. via truncate, fallocate, or write) across an\nunaligned EOF boundary, we need to ensure that post-EOF data in the partial\npage is zeroed out in pagecache and marked dirty, then writeback the cache to\npersist zeroed data before committing inode w/ updated i_size.\n\nThis help to prevent stale disk data beyond the previous EOF from being exposed\nafter remounting or crash recovery.\n\nSince f2fs is a LFS filesystem, we only support direct write via PBA in pinfile,\nand pinfile has section-aligned filesize, so in Android, there should no problem,\nbut for other usage in different environment, let's fix this w/ fsync_mode=strict\nmount option."
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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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"fs/f2fs/file.c"
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],
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"versions": [
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{
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"version": "fbfa2cc58d5363f780f4f2ad0243a47185c2bb2a",
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"lessThan": "6882d458d2e403f6ba7b45542dd31a6b7531eb2e",
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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": "fbfa2cc58d5363f780f4f2ad0243a47185c2bb2a",
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"lessThan": "32c7f11a24268ba8d3bb50ea7f54d33f698cd253",
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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": "fbfa2cc58d5363f780f4f2ad0243a47185c2bb2a",
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"lessThan": "91ec55ddc097ccddd25ffb95a3d079b2ef362372",
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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": "fbfa2cc58d5363f780f4f2ad0243a47185c2bb2a",
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"lessThan": "c42608c09b6b5d5967bf211c255914c068c2cde1",
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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": "fbfa2cc58d5363f780f4f2ad0243a47185c2bb2a",
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"lessThan": "5eced87b7d19dbc76ebdddaf322046f9ac582fcb",
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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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"fs/f2fs/file.c"
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],
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"versions": [
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{
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"version": "3.8",
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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": "3.8",
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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": "6.6.157",
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"lessThanOrEqual": "6.6.*",
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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": "6.12.110",
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"lessThanOrEqual": "6.12.*",
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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": "6.18.51",
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"lessThanOrEqual": "6.18.*",
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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": "7.2.5",
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"lessThanOrEqual": "7.2.*",
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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": "7.3",
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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": "3.8",
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"versionEndExcluding": "6.6.157"
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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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"versionStartIncluding": "3.8",
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"versionEndExcluding": "6.12.110"
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},
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.8",
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"versionEndExcluding": "6.18.51"
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.8",
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"versionEndExcluding": "7.2.5"
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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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"versionStartIncluding": "3.8",
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"versionEndExcluding": "7.3"
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}
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]
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}
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]
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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/6882d458d2e403f6ba7b45542dd31a6b7531eb2e"
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},
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{
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"url": "https://git.kernel.org/stable/c/32c7f11a24268ba8d3bb50ea7f54d33f698cd253"
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},
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{
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"url": "https://git.kernel.org/stable/c/91ec55ddc097ccddd25ffb95a3d079b2ef362372"
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},
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{
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"url": "https://git.kernel.org/stable/c/c42608c09b6b5d5967bf211c255914c068c2cde1"
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},
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{
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"url": "https://git.kernel.org/stable/c/5eced87b7d19dbc76ebdddaf322046f9ac582fcb"
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}
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],
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"title": "f2fs: fix to zero post-EOF data when extending file size",
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"x_generator": {
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} |