227 lines
12 KiB
JSON
227 lines
12 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-2026-97416",
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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": "2026-09-24T14:53:16.867Z",
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"datePublished": "2026-09-24T16:03:23.731Z",
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"dateUpdated": "2026-10-03T10:58:07.862Z"
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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": "2026-10-03T10:58:07.862Z"
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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\nbtrfs: balance: fix potential bg lookup failure in btrfs_may_alloc_data_chunk()\n\n[BUG]\nRunning btrfs balance can trigger a null-ptr-deref before relocating a\ndata chunk when metadata corruption leaves a chunk in the chunk tree\nwithout a corresponding block group in the in-memory cache:\n\n KASAN: null-ptr-deref in range [0x0000000000000088-0x000000000000008f]\n RIP: 0010:btrfs_may_alloc_data_chunk+0x40/0x1c0 fs/btrfs/volumes.c:3601\n Call Trace:\n __btrfs_balance fs/btrfs/volumes.c:4217 [inline]\n btrfs_balance+0x2516/0x42b0 fs/btrfs/volumes.c:4604\n btrfs_ioctl_balance fs/btrfs/ioctl.c:3577 [inline]\n btrfs_ioctl+0x25cf/0x5b90 fs/btrfs/ioctl.c:5313\n ...\n\n[CAUSE]\n__btrfs_balance() iterates the on-disk chunk tree and passes the chunk\nlogical bytenr to btrfs_may_alloc_data_chunk() before relocating a data\nchunk. That helper then queries the in-memory block group cache:\n\n cache = btrfs_lookup_block_group(fs_info, chunk_offset);\n chunk_type = cache->flags; /* cache may be NULL */\n\nA corrupt image can contain a chunk item whose matching block group\nitem is missing, so no block group is ever inserted into the cache. In\nthat case btrfs_lookup_block_group() returns NULL.\n\nThe code only guards this with ASSERT(cache), which becomes a no-op when\nCONFIG_BTRFS_ASSERT is disabled. The subsequent dereference of\ncache->flags therefore crashes the kernel.\n\n[FIX]\nAdd a NULL check after btrfs_lookup_block_group() in\nbtrfs_may_alloc_data_chunk() and print and error message for clarity."
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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/btrfs/volumes.c"
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],
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"versions": [
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{
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"version": "a6f93c71d412ba8ed743152c3a54ad0b78dcd9c7",
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"lessThan": "9f37a6d6ae9e998232e2ba091ab4999cdf967e1b",
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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": "a6f93c71d412ba8ed743152c3a54ad0b78dcd9c7",
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"lessThan": "e479236a8f4d85c4fb6b3f7c2556c21f583e2bf2",
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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": "a6f93c71d412ba8ed743152c3a54ad0b78dcd9c7",
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"lessThan": "322f891b4d4fe64acb3351a0ffa62a7fa5ba7256",
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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": "a6f93c71d412ba8ed743152c3a54ad0b78dcd9c7",
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"lessThan": "81a664ed8b1a44c76b204c4bd0d751317a02c5cd",
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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": "a6f93c71d412ba8ed743152c3a54ad0b78dcd9c7",
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"lessThan": "9740dd0c17a4be8cc47a06c5ca5293471a7e286e",
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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": "a6f93c71d412ba8ed743152c3a54ad0b78dcd9c7",
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"lessThan": "59f75e0c8724d4adebc08c7dd3ff2358b80c21f7",
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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": "a6f93c71d412ba8ed743152c3a54ad0b78dcd9c7",
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"lessThan": "18d32b0013efba19f7ad3e5b08d7aee813d604a6",
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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/btrfs/volumes.c"
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],
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"versions": [
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{
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"version": "4.16",
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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": "4.16",
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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": "5.10.271",
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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": "5.15.222",
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"lessThanOrEqual": "5.15.*",
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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": "6.1.189",
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"lessThanOrEqual": "6.1.*",
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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": "6.6.158",
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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": "6.12.111",
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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": "6.18.53",
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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",
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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": "4.16",
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"versionEndExcluding": "5.10.271"
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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": "4.16",
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"versionEndExcluding": "5.15.222"
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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": "4.16",
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"versionEndExcluding": "6.1.189"
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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": "4.16",
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"versionEndExcluding": "6.6.158"
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},
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.16",
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"versionEndExcluding": "6.12.111"
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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": "4.16",
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"versionEndExcluding": "6.18.53"
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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": "4.16",
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"versionEndExcluding": "7.2"
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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/9f37a6d6ae9e998232e2ba091ab4999cdf967e1b"
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},
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{
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"url": "https://git.kernel.org/stable/c/e479236a8f4d85c4fb6b3f7c2556c21f583e2bf2"
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},
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{
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"url": "https://git.kernel.org/stable/c/322f891b4d4fe64acb3351a0ffa62a7fa5ba7256"
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},
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{
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"url": "https://git.kernel.org/stable/c/81a664ed8b1a44c76b204c4bd0d751317a02c5cd"
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},
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{
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"url": "https://git.kernel.org/stable/c/9740dd0c17a4be8cc47a06c5ca5293471a7e286e"
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},
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{
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"url": "https://git.kernel.org/stable/c/59f75e0c8724d4adebc08c7dd3ff2358b80c21f7"
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},
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{
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"url": "https://git.kernel.org/stable/c/18d32b0013efba19f7ad3e5b08d7aee813d604a6"
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}
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],
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"title": "btrfs: balance: fix potential bg lookup failure in btrfs_may_alloc_data_chunk()",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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} |