{"id":"CVE-2023-54087","state":"PUBLISHED","title":"ubi: Fix possible null-ptr-deref in ubi_free_volume()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nubi: Fix possible null-ptr-deref in ubi_free_volume()\n\nIt willl cause null-ptr-deref in the following case:\n\nuif_init()\n  ubi_add_volume()\n    cdev_add() -> if it fails, call kill_volumes()\n    device_register()\n\nkill_volumes() -> if ubi_add_volume() fails call this function\n  ubi_free_volume()\n    cdev_del()\n    device_unregister() -> trying to delete a not added device,\n\t\t\t   it causes null-ptr-deref\n\nSo in ubi_free_volume(), it delete devices whether they are added\nor not, it will causes null-ptr-deref.\n\nHandle the error case whlie calling ubi_add_volume() to fix this\nproblem. If add volume fails, set the corresponding vol to null,\nso it can not be accessed in kill_volumes() and release the\nresource in ubi_add_volume() error path.","publishedAt":"2025-12-24T13:06:17.555Z","updatedAt":"2026-05-11T19:55:14.333Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"801c135ce73d5df1caf3eca35b66a10824ae0707","status":"affected","lessThan":"5558bcf1c58720ca6e9d6198d921cb3aa337f038","versionType":"git"},{"version":"801c135ce73d5df1caf3eca35b66a10824ae0707","status":"affected","lessThan":"45b2c5ca4d2edae70f19fdb086bd927840c4c309","versionType":"git"},{"version":"801c135ce73d5df1caf3eca35b66a10824ae0707","status":"affected","lessThan":"234c53e57424992e657e6f4acc00d3df0983176f","versionType":"git"},{"version":"801c135ce73d5df1caf3eca35b66a10824ae0707","status":"affected","lessThan":"fcbc795abe7897da4b5d2a6ab5010e36774b00c2","versionType":"git"},{"version":"801c135ce73d5df1caf3eca35b66a10824ae0707","status":"affected","lessThan":"5ec4c8aca5a221756a9007deadfea92795319fee","versionType":"git"},{"version":"801c135ce73d5df1caf3eca35b66a10824ae0707","status":"affected","lessThan":"2ea7195b195009ecf0046e55361f393ba96d02db","versionType":"git"},{"version":"801c135ce73d5df1caf3eca35b66a10824ae0707","status":"affected","lessThan":"9eccdb0760cbcb4427b5303a83a3007de998af51","versionType":"git"},{"version":"801c135ce73d5df1caf3eca35b66a10824ae0707","status":"affected","lessThan":"c15859bfd326c10230f09cb48a17f8a35f190342","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/mtd/ubi/build.c","drivers/mtd/ubi/vmt.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.22","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.22","versionType":"semver"},{"version":"4.14.308","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.276","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.235","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.173","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.100","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.18","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.2.5","status":"unaffected","lessThanOrEqual":"6.2.*","versionType":"semver"},{"version":"6.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/mtd/ubi/build.c","drivers/mtd/ubi/vmt.c"]}],"references":["https://git.kernel.org/stable/c/5558bcf1c58720ca6e9d6198d921cb3aa337f038","https://git.kernel.org/stable/c/45b2c5ca4d2edae70f19fdb086bd927840c4c309","https://git.kernel.org/stable/c/234c53e57424992e657e6f4acc00d3df0983176f","https://git.kernel.org/stable/c/fcbc795abe7897da4b5d2a6ab5010e36774b00c2","https://git.kernel.org/stable/c/5ec4c8aca5a221756a9007deadfea92795319fee","https://git.kernel.org/stable/c/2ea7195b195009ecf0046e55361f393ba96d02db","https://git.kernel.org/stable/c/9eccdb0760cbcb4427b5303a83a3007de998af51","https://git.kernel.org/stable/c/c15859bfd326c10230f09cb48a17f8a35f190342"],"weaknesses":[],"ingestedAt":"2026-10-29T20:06:42.242Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/54xxx/CVE-2023-54087.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2023-54087","state":"PUBLISHED","datePublished":"2025-12-24T13:06:17.555Z","dateUpdated":"2026-05-11T19:55:14.333Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-12-24T13:02:52.515Z"},"containers":{"cna":{"title":"ubi: Fix possible null-ptr-deref in ubi_free_volume()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nubi: Fix possible null-ptr-deref in ubi_free_volume()\n\nIt willl cause null-ptr-deref in the following case:\n\nuif_init()\n  ubi_add_volume()\n    cdev_add() -> if it fails, call kill_volumes()\n    device_register()\n\nkill_volumes() -> if ubi_add_volume() fails call this function\n  ubi_free_volume()\n    cdev_del()\n    device_unregister() -> trying to delete a not added device,\n\t\t\t   it causes null-ptr-deref\n\nSo in ubi_free_volume(), it delete devices whether they are added\nor not, it will causes null-ptr-deref.\n\nHandle the error case whlie calling ubi_add_volume() to fix this\nproblem. If add volume fails, set the corresponding vol to null,\nso it can not be accessed in kill_volumes() and release the\nresource in ubi_add_volume() error path."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"801c135ce73d5df1caf3eca35b66a10824ae0707","status":"affected","lessThan":"5558bcf1c58720ca6e9d6198d921cb3aa337f038","versionType":"git"},{"version":"801c135ce73d5df1caf3eca35b66a10824ae0707","status":"affected","lessThan":"45b2c5ca4d2edae70f19fdb086bd927840c4c309","versionType":"git"},{"version":"801c135ce73d5df1caf3eca35b66a10824ae0707","status":"affected","lessThan":"234c53e57424992e657e6f4acc00d3df0983176f","versionType":"git"},{"version":"801c135ce73d5df1caf3eca35b66a10824ae0707","status":"affected","lessThan":"fcbc795abe7897da4b5d2a6ab5010e36774b00c2","versionType":"git"},{"version":"801c135ce73d5df1caf3eca35b66a10824ae0707","status":"affected","lessThan":"5ec4c8aca5a221756a9007deadfea92795319fee","versionType":"git"},{"version":"801c135ce73d5df1caf3eca35b66a10824ae0707","status":"affected","lessThan":"2ea7195b195009ecf0046e55361f393ba96d02db","versionType":"git"},{"version":"801c135ce73d5df1caf3eca35b66a10824ae0707","status":"affected","lessThan":"9eccdb0760cbcb4427b5303a83a3007de998af51","versionType":"git"},{"version":"801c135ce73d5df1caf3eca35b66a10824ae0707","status":"affected","lessThan":"c15859bfd326c10230f09cb48a17f8a35f190342","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/mtd/ubi/build.c","drivers/mtd/ubi/vmt.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.22","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.22","versionType":"semver"},{"version":"4.14.308","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.276","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.235","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.173","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.100","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.18","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.2.5","status":"unaffected","lessThanOrEqual":"6.2.*","versionType":"semver"},{"version":"6.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/mtd/ubi/build.c","drivers/mtd/ubi/vmt.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/5558bcf1c58720ca6e9d6198d921cb3aa337f038"},{"url":"https://git.kernel.org/stable/c/45b2c5ca4d2edae70f19fdb086bd927840c4c309"},{"url":"https://git.kernel.org/stable/c/234c53e57424992e657e6f4acc00d3df0983176f"},{"url":"https://git.kernel.org/stable/c/fcbc795abe7897da4b5d2a6ab5010e36774b00c2"},{"url":"https://git.kernel.org/stable/c/5ec4c8aca5a221756a9007deadfea92795319fee"},{"url":"https://git.kernel.org/stable/c/2ea7195b195009ecf0046e55361f393ba96d02db"},{"url":"https://git.kernel.org/stable/c/9eccdb0760cbcb4427b5303a83a3007de998af51"},{"url":"https://git.kernel.org/stable/c/c15859bfd326c10230f09cb48a17f8a35f190342"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T19:55:14.333Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.22","versionEndExcluding":"4.14.308"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.22","versionEndExcluding":"4.19.276"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.22","versionEndExcluding":"5.4.235"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.22","versionEndExcluding":"5.10.173"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.22","versionEndExcluding":"5.15.100"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.22","versionEndExcluding":"6.1.18"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.22","versionEndExcluding":"6.2.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.22","versionEndExcluding":"6.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}