{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-68147", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-30T09:28:09.371Z", "datePublished": "2026-08-10T11:59:12.308Z", "dateUpdated": "2026-08-10T11:59:12.308Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-10T11:59:12.308Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfscrypt: Avoid dynamic allocation in fscrypt_get_devices()\n\nWhen a blk_crypto_key starts being used or is evicted, fs/crypto/ calls\nfscrypt_get_devices() to get the filesystem's list of block devices,\nthen iterates over them and calls blk_crypto_config_supported(),\nblk_crypto_start_using_key(), or blk_crypto_evict_key() on each one.\n\nCurrently, the block device pointers are placed in a dynamically\nallocated array. This dynamic allocation is problematic because:\n\n- It can fail, especially at the fscrypt_destroy_inline_crypt_key() call\n site when it's invoked for inode eviction under direct reclaim.\n\n- fscrypt_destroy_inline_crypt_key() doesn't handle the failure. It\n just zeroizes and frees the blk_crypto_key without calling\n blk_crypto_evict_key(). That causes a use-after-free.\n\nFor now, let's fix this in the straightforward and easily-backportable\nway by switching to an on-stack array. Currently the fscrypt\nmulti-device functionality is used only by f2fs, which has a hardcoded\nlimit of 8 block devices. An on-stack array works fine for that.\n\n(Of course, this solution won't scale up to large number of block\ndevices. For that we'd need a different solution, like moving the block\ndevice iteration into the filesystem. Or in the case of btrfs, which\nwill only support blk-crypto-fallback, we should make it just call\nblk-crypto-fallback directly, so the block devices won't be needed.)"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/crypto/inline_crypt.c", "fs/f2fs/super.c", "include/linux/fscrypt.h"], "versions": [{"version": "22e9947a4b2ba255888541bd0111cf00b9b16586", "lessThan": "4462ac3d90e897dda52ce4b6af2d526ddae835a8", "status": "affected", "versionType": "git"}, {"version": "22e9947a4b2ba255888541bd0111cf00b9b16586", "lessThan": "97a688563be71ec6fefc071aff69a66c69dbe244", "status": "affected", "versionType": "git"}, {"version": "22e9947a4b2ba255888541bd0111cf00b9b16586", "lessThan": "81ea8e8221853950c47dac7164f27c63a96f8f86", "status": "affected", "versionType": "git"}, {"version": "22e9947a4b2ba255888541bd0111cf00b9b16586", "lessThan": "bc2d630296e0e049210ec05ff08459a6893ae749", "status": "affected", "versionType": "git"}, {"version": "22e9947a4b2ba255888541bd0111cf00b9b16586", "lessThan": "6fe4e4b8259e1330945b5f3c9476e08473b8e0e8", "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/crypto/inline_crypt.c", "fs/f2fs/super.c", "include/linux/fscrypt.h"], "versions": [{"version": "6.1", "status": "affected"}, {"version": "0", "lessThan": "6.1", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.148", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.101", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.42", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.6", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2-rc5", "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": "6.1", "versionEndExcluding": "6.6.148"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1", "versionEndExcluding": "6.12.101"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1", "versionEndExcluding": "6.18.42"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1", "versionEndExcluding": "7.1.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1", "versionEndExcluding": "7.2-rc5"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/4462ac3d90e897dda52ce4b6af2d526ddae835a8"}, {"url": "https://git.kernel.org/stable/c/97a688563be71ec6fefc071aff69a66c69dbe244"}, {"url": "https://git.kernel.org/stable/c/81ea8e8221853950c47dac7164f27c63a96f8f86"}, {"url": "https://git.kernel.org/stable/c/bc2d630296e0e049210ec05ff08459a6893ae749"}, {"url": "https://git.kernel.org/stable/c/6fe4e4b8259e1330945b5f3c9476e08473b8e0e8"}], "title": "fscrypt: Avoid dynamic allocation in fscrypt_get_devices()", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[22e9947a4b2ba255888541bd0111cf00b9b16586,4462ac3d90e897dda52ce4b6af2d526ddae835a8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[22e9947a4b2ba255888541bd0111cf00b9b16586,97a688563be71ec6fefc071aff69a66c69dbe244)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[22e9947a4b2ba255888541bd0111cf00b9b16586,81ea8e8221853950c47dac7164f27c63a96f8f86)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[22e9947a4b2ba255888541bd0111cf00b9b16586,bc2d630296e0e049210ec05ff08459a6893ae749)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[22e9947a4b2ba255888541bd0111cf00b9b16586,6fe4e4b8259e1330945b5f3c9476e08473b8e0e8)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "6.1"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.1)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.148,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.101,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.42,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.6,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc5,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-10T14:15:03.849928+00:00", "updated": "2026-08-10T15:45:03.478541+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-416"]}