143 lines
8.3 KiB
JSON
143 lines
8.3 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-2025-40246",
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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": "2025-04-16T07:20:57.181Z",
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"datePublished": "2025-12-04T16:08:09.751Z",
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"dateUpdated": "2026-05-11T21:45:37.260Z"
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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": "2026-05-11T21:45:37.260Z"
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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\nxfs: fix out of bounds memory read error in symlink repair\n\nxfs/286 produced this report on my test fleet:\n\n ==================================================================\n BUG: KFENCE: out-of-bounds read in memcpy_orig+0x54/0x110\n\n Out-of-bounds read at 0xffff88843fe9e038 (184B right of kfence-#184):\n memcpy_orig+0x54/0x110\n xrep_symlink_salvage_inline+0xb3/0xf0 [xfs]\n xrep_symlink_salvage+0x100/0x110 [xfs]\n xrep_symlink+0x2e/0x80 [xfs]\n xrep_attempt+0x61/0x1f0 [xfs]\n xfs_scrub_metadata+0x34f/0x5c0 [xfs]\n xfs_ioc_scrubv_metadata+0x387/0x560 [xfs]\n xfs_file_ioctl+0xe23/0x10e0 [xfs]\n __x64_sys_ioctl+0x76/0xc0\n do_syscall_64+0x4e/0x1e0\n entry_SYSCALL_64_after_hwframe+0x4b/0x53\n\n kfence-#184: 0xffff88843fe9df80-0xffff88843fe9dfea, size=107, cache=kmalloc-128\n\n allocated by task 3470 on cpu 1 at 263329.131592s (192823.508886s ago):\n xfs_init_local_fork+0x79/0xe0 [xfs]\n xfs_iformat_local+0xa4/0x170 [xfs]\n xfs_iformat_data_fork+0x148/0x180 [xfs]\n xfs_inode_from_disk+0x2cd/0x480 [xfs]\n xfs_iget+0x450/0xd60 [xfs]\n xfs_bulkstat_one_int+0x6b/0x510 [xfs]\n xfs_bulkstat_iwalk+0x1e/0x30 [xfs]\n xfs_iwalk_ag_recs+0xdf/0x150 [xfs]\n xfs_iwalk_run_callbacks+0xb9/0x190 [xfs]\n xfs_iwalk_ag+0x1dc/0x2f0 [xfs]\n xfs_iwalk_args.constprop.0+0x6a/0x120 [xfs]\n xfs_iwalk+0xa4/0xd0 [xfs]\n xfs_bulkstat+0xfa/0x170 [xfs]\n xfs_ioc_fsbulkstat.isra.0+0x13a/0x230 [xfs]\n xfs_file_ioctl+0xbf2/0x10e0 [xfs]\n __x64_sys_ioctl+0x76/0xc0\n do_syscall_64+0x4e/0x1e0\n entry_SYSCALL_64_after_hwframe+0x4b/0x53\n\n CPU: 1 UID: 0 PID: 1300113 Comm: xfs_scrub Not tainted 6.18.0-rc4-djwx #rc4 PREEMPT(lazy) 3d744dd94e92690f00a04398d2bd8631dcef1954\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.0-4.module+el8.8.0+21164+ed375313 04/01/2014\n ==================================================================\n\nOn further analysis, I realized that the second parameter to min() is\nnot correct. xfs_ifork::if_bytes is the size of the xfs_ifork::if_data\nbuffer. if_bytes can be smaller than the data fork size because:\n\n(a) the forkoff code tries to keep the data area as large as possible\n(b) for symbolic links, if_bytes is the ondisk file size + 1\n(c) forkoff is always a multiple of 8.\n\nCase in point: for a single-byte symlink target, forkoff will be\n8 but the buffer will only be 2 bytes long.\n\nIn other words, the logic here is wrong and we walk off the end of the\nincore buffer. Fix that."
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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/xfs/scrub/symlink_repair.c"
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],
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"versions": [
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{
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"version": "2651923d8d8db00a57665822f017fa7c76758044",
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"lessThan": "7c2d68e091584149fe89bcbaf9b99b3162d46ee7",
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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": "2651923d8d8db00a57665822f017fa7c76758044",
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"lessThan": "81a8685cac4bf081c93a7df591644f4f80240bb9",
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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": "2651923d8d8db00a57665822f017fa7c76758044",
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"lessThan": "678e1cc2f482e0985a0613ab4a5bf89c497e5acc",
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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/xfs/scrub/symlink_repair.c"
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],
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"versions": [
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{
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"version": "6.10",
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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": "6.10",
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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": "6.12.60",
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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": "6.17.10",
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"lessThanOrEqual": "6.17.*",
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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",
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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": "6.10",
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"versionEndExcluding": "6.12.60"
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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": "6.10",
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"versionEndExcluding": "6.17.10"
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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": "6.10",
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"versionEndExcluding": "6.18"
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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/7c2d68e091584149fe89bcbaf9b99b3162d46ee7"
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},
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{
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"url": "https://git.kernel.org/stable/c/81a8685cac4bf081c93a7df591644f4f80240bb9"
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},
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{
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"url": "https://git.kernel.org/stable/c/678e1cc2f482e0985a0613ab4a5bf89c497e5acc"
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}
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],
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"title": "xfs: fix out of bounds memory read error in symlink repair",
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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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}
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} |