CVE-2026-46303 - Vulnerability Details

Vendors	Products
Linux	Linux Kernel

Link	Providers
https://git.kernel.org/stable/c/22b36fa081f38ab397c7697f9d539211b51a0cfc
https://git.kernel.org/stable/c/8356fb821016797f5677cbeee5ddc0d32a95b4be
https://git.kernel.org/stable/c/a36d990f591320e9dd379ab30063ebfe91d47e1f
https://git.kernel.org/stable/c/bf1bc673c587f5ef7e9c09b94aea7c5a7847d4d9
https://git.kernel.org/stable/c/c9b37c8b73f6368e4750e5ccb0632c380b43c6e5
https://git.kernel.org/stable/c/d582e12378bc1637f337622feef762f53c43fd57
https://git.kernel.org/stable/c/e69da8eeab74b4f4505024c38a17bce060fe7df8
https://git.kernel.org/stable/c/ef048470c90bc8c1b8318bb2ce329da9ef64b9fe

Type	Values Removed	Values Added
Description		In the Linux kernel, the following vulnerability has been resolved: isofs: validate Rock Ridge CE continuation extent against volume size rock_continue() reads rs->cont_extent verbatim from the Rock Ridge CE record and passes it to sb_bread() without checking that the block number is within the mounted ISO 9660 volume. commit e595447e177b ("[PATCH] rock.c: handle corrupted directories") added cont_offset and cont_size rejection for the CE continuation but did not validate the extent block number itself. commit f54e18f1b831 ("isofs: Fix infinite looping over CE entries") later capped the CE chain length at RR_MAX_CE_ENTRIES = 32 but again left the block number unchecked. With a crafted ISO mounted via udisks2 (desktop optical auto-mount) or via CAP_SYS_ADMIN mount, rs->cont_extent can therefore point at an out-of-range block or at blocks belonging to an adjacent filesystem on the same block device. sb_bread() on an out-of-range block returns NULL cleanly via the block layer EIO path, so there is no memory-safety violation. For in-range reads of adjacent- filesystem data, the CE buffer is parsed as Rock Ridge records and only the text of SL sub-records reaches userspace through readlink(), which makes the info-leak channel narrow and difficult to exploit; still, rejecting the malformed CE outright matches the rejection shape already present in the same function for cont_offset and cont_size. Add an ISOFS_SB(sb)->s_nzones bounds check to rock_continue() next to the existing offset/size rejection, printing the same corrupted-directory-entry notice.
Title		isofs: validate Rock Ridge CE continuation extent against volume size
First Time appeared		Linux Linux linux Kernel
CPEs		cpe:2.3:o:linux:linux_kernel::::::::
Vendors & Products		Linux Linux linux Kernel
References		https://git.kernel.org/stable/c/22b36fa081f38ab397c7697f9d539211b51a0cfc https://git.kernel.org/stable/c/8356fb821016797f5677cbeee5ddc0d32a95b4be https://git.kernel.org/stable/c/a36d990f591320e9dd379ab30063ebfe91d47e1f https://git.kernel.org/stable/c/bf1bc673c587f5ef7e9c09b94aea7c5a7847d4d9 https://git.kernel.org/stable/c/c9b37c8b73f6368e4750e5ccb0632c380b43c6e5 https://git.kernel.org/stable/c/d582e12378bc1637f337622feef762f53c43fd57 https://git.kernel.org/stable/c/e69da8eeab74b4f4505024c38a17bce060fe7df8 https://git.kernel.org/stable/c/ef048470c90bc8c1b8318bb2ce329da9ef64b9fe

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-46303", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-13T15:03:33.111Z", "datePublished": "2026-06-08T15:46:30.642Z", "dateUpdated": "2026-06-08T15:46:30.642Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-06-08T15:46:30.642Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nisofs: validate Rock Ridge CE continuation extent against volume size\n\nrock_continue() reads rs->cont_extent verbatim from the Rock Ridge CE\nrecord and passes it to sb_bread() without checking that the block\nnumber is within the mounted ISO 9660 volume. commit e595447e177b\n(\"[PATCH] rock.c: handle corrupted directories\") added cont_offset\nand cont_size rejection for the CE continuation but did not validate\nthe extent block number itself. commit f54e18f1b831 (\"isofs: Fix\ninfinite looping over CE entries\") later capped the CE chain length\nat RR_MAX_CE_ENTRIES = 32 but again left the block number unchecked.\n\nWith a crafted ISO mounted via udisks2 (desktop optical auto-mount)\nor via CAP_SYS_ADMIN mount, rs->cont_extent can therefore point at\nan out-of-range block or at blocks belonging to an adjacent\nfilesystem on the same block device. sb_bread() on an out-of-range\nblock returns NULL cleanly via the block layer EIO path, so there\nis no memory-safety violation. For in-range reads of adjacent-\nfilesystem data, the CE buffer is parsed as Rock Ridge records and\nonly the text of SL sub-records reaches userspace through\nreadlink(), which makes the info-leak channel narrow and difficult\nto exploit; still, rejecting the malformed CE outright matches the\nrejection shape already present in the same function for\ncont_offset and cont_size.\n\nAdd an ISOFS_SB(sb)->s_nzones bounds check to rock_continue() next\nto the existing offset/size rejection, printing the same\ncorrupted-directory-entry notice."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/isofs/rock.c"], "versions": [{"version": "f54e18f1b831c92f6512d2eedb224cd63d607d3d", "lessThan": "8356fb821016797f5677cbeee5ddc0d32a95b4be", "status": "affected", "versionType": "git"}, {"version": "f54e18f1b831c92f6512d2eedb224cd63d607d3d", "lessThan": "d582e12378bc1637f337622feef762f53c43fd57", "status": "affected", "versionType": "git"}, {"version": "f54e18f1b831c92f6512d2eedb224cd63d607d3d", "lessThan": "bf1bc673c587f5ef7e9c09b94aea7c5a7847d4d9", "status": "affected", "versionType": "git"}, {"version": "f54e18f1b831c92f6512d2eedb224cd63d607d3d", "lessThan": "c9b37c8b73f6368e4750e5ccb0632c380b43c6e5", "status": "affected", "versionType": "git"}, {"version": "f54e18f1b831c92f6512d2eedb224cd63d607d3d", "lessThan": "22b36fa081f38ab397c7697f9d539211b51a0cfc", "status": "affected", "versionType": "git"}, {"version": "f54e18f1b831c92f6512d2eedb224cd63d607d3d", "lessThan": "e69da8eeab74b4f4505024c38a17bce060fe7df8", "status": "affected", "versionType": "git"}, {"version": "f54e18f1b831c92f6512d2eedb224cd63d607d3d", "lessThan": "ef048470c90bc8c1b8318bb2ce329da9ef64b9fe", "status": "affected", "versionType": "git"}, {"version": "f54e18f1b831c92f6512d2eedb224cd63d607d3d", "lessThan": "a36d990f591320e9dd379ab30063ebfe91d47e1f", "status": "affected", "versionType": "git"}, {"version": "08313e26e06d4aa9ce1cbba1a8e359e9cab9ad56", "status": "affected", "versionType": "git"}, {"version": "212c4d33ca83e2144064fe9c2911607fbed5386f", "status": "affected", "versionType": "git"}, {"version": "96e44adce250199ec9b2b928be66365779ff1b59", "status": "affected", "versionType": "git"}, {"version": "1fe5620fcd6c2f0a4a927ee10c8e53196da392f3", "status": "affected", "versionType": "git"}, {"version": "fbce0d7dc8965c9fb8d411862040239d4a768c71", "status": "affected", "versionType": "git"}, {"version": "8190393a88f2b0321263a54f2a9eb5a2aa43be7e", "status": "affected", "versionType": "git"}, {"version": "486aa789eadcf44ed87f972b209299c516454693", "status": "affected", "versionType": "git"}, {"version": "b6d20edb6e7cedb4eedb9e0193d20dd488ebae84", "status": "affected", "versionType": "git"}, {"version": "2.6.32.66", "lessThan": "2.6.33", "status": "affected", "versionType": "semver"}, {"version": "3.2.67", "lessThan": "3.3", "status": "affected", "versionType": "semver"}, {"version": "3.4.107", "lessThan": "3.5", "status": "affected", "versionType": "semver"}, {"version": "3.10.64", "lessThan": "3.11", "status": "affected", "versionType": "semver"}, {"version": "3.12.36", "lessThan": "3.13", "status": "affected", "versionType": "semver"}, {"version": "3.14.28", "lessThan": "3.15", "status": "affected", "versionType": "semver"}, {"version": "3.17.8", "lessThan": "3.18", "status": "affected", "versionType": "semver"}, {"version": "3.18.2", "lessThan": "3.19", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/isofs/rock.c"], "versions": [{"version": "3.19", "status": "affected"}, {"version": "0", "lessThan": "3.19", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.258", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.209", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.175", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.140", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.88", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.30", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.7", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1-rc2", "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": "3.19", "versionEndExcluding": "5.10.258"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "5.15.209"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "6.1.175"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "6.6.140"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "6.12.88"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "6.18.30"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "7.0.7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": 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"https://git.kernel.org/stable/c/8356fb821016797f5677cbeee5ddc0d32a95b4be"}, {"url": "https://git.kernel.org/stable/c/d582e12378bc1637f337622feef762f53c43fd57"}, {"url": "https://git.kernel.org/stable/c/bf1bc673c587f5ef7e9c09b94aea7c5a7847d4d9"}, {"url": "https://git.kernel.org/stable/c/c9b37c8b73f6368e4750e5ccb0632c380b43c6e5"}, {"url": "https://git.kernel.org/stable/c/22b36fa081f38ab397c7697f9d539211b51a0cfc"}, {"url": "https://git.kernel.org/stable/c/e69da8eeab74b4f4505024c38a17bce060fe7df8"}, {"url": "https://git.kernel.org/stable/c/ef048470c90bc8c1b8318bb2ce329da9ef64b9fe"}, {"url": "https://git.kernel.org/stable/c/a36d990f591320e9dd379ab30063ebfe91d47e1f"}], "title": "isofs: validate Rock Ridge CE continuation extent against volume size", "x_generator": {"engine": "bippy-1.2.0"}}}}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nisofs: validate Rock Ridge CE continuation extent against volume size\n\nrock_continue() reads rs->cont_extent verbatim from the Rock Ridge CE\nrecord and passes it to sb_bread() without checking that the block\nnumber is within the mounted ISO 9660 volume. commit e595447e177b\n(\"[PATCH] rock.c: handle corrupted directories\") added cont_offset\nand cont_size rejection for the CE continuation but did not validate\nthe extent block number itself. commit f54e18f1b831 (\"isofs: Fix\ninfinite looping over CE entries\") later capped the CE chain length\nat RR_MAX_CE_ENTRIES = 32 but again left the block number unchecked.\n\nWith a crafted ISO mounted via udisks2 (desktop optical auto-mount)\nor via CAP_SYS_ADMIN mount, rs->cont_extent can therefore point at\nan out-of-range block or at blocks belonging to an adjacent\nfilesystem on the same block device. sb_bread() on an out-of-range\nblock returns NULL cleanly via the block layer EIO path, so there\nis no memory-safety violation. For in-range reads of adjacent-\nfilesystem data, the CE buffer is parsed as Rock Ridge records and\nonly the text of SL sub-records reaches userspace through\nreadlink(), which makes the info-leak channel narrow and difficult\nto exploit; still, rejecting the malformed CE outright matches the\nrejection shape already present in the same function for\ncont_offset and cont_size.\n\nAdd an ISOFS_SB(sb)->s_nzones bounds check to rock_continue() next\nto the existing offset/size rejection, printing the same\ncorrupted-directory-entry notice."}], "id": "CVE-2026-46303", "lastModified": "2026-06-08T17:16:48.853", "metrics": {}, "published": "2026-06-08T17:16:48.853", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/22b36fa081f38ab397c7697f9d539211b51a0cfc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8356fb821016797f5677cbeee5ddc0d32a95b4be"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a36d990f591320e9dd379ab30063ebfe91d47e1f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bf1bc673c587f5ef7e9c09b94aea7c5a7847d4d9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c9b37c8b73f6368e4750e5ccb0632c380b43c6e5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d582e12378bc1637f337622feef762f53c43fd57"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e69da8eeab74b4f4505024c38a17bce060fe7df8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ef048470c90bc8c1b8318bb2ce329da9ef64b9fe"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

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