{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-40124", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T07:20:57.169Z", "datePublished": "2025-11-12T10:23:19.861Z", "dateUpdated": "2026-05-11T21:43:14.128Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T21:43:14.128Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsparc: fix accurate exception reporting in copy_{from_to}_user for UltraSPARC III\n\nAnthony Yznaga tracked down that a BUG_ON in ext4 code with large folios\nenabled resulted from copy_from_user() returning impossibly large values\ngreater than the size to be copied. This lead to __copy_from_iter()\nreturning impossible values instead of the actual number of bytes it was\nable to copy.\n\nThe BUG_ON has been reported in\nhttps://lore.kernel.org/r/b14f55642207e63e907965e209f6323a0df6dcee.camel@physik.fu-berlin.de\n\nThe referenced commit introduced exception handlers on user-space memory\nreferences in copy_from_user and copy_to_user. These handlers return from\nthe respective function and calculate the remaining bytes left to copy\nusing the current register contents. The exception handlers expect that\n%o2 has already been masked during the bulk copy loop, but the masking was\nperformed after that loop. This will fix the return value of copy_from_user\nand copy_to_user in the faulting case. The behaviour of memcpy stays\nunchanged."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/sparc/lib/U3memcpy.S"], "versions": [{"version": "ee841d0aff649164080e445e84885015958d8ff4", "lessThan": "fdd43fe6d286f27b826572457a89c926f97e2d3a", "status": "affected", "versionType": "git"}, {"version": "ee841d0aff649164080e445e84885015958d8ff4", "lessThan": "1198077606aeffb102587c6ea079ce99641c99d4", "status": "affected", "versionType": "git"}, {"version": "ee841d0aff649164080e445e84885015958d8ff4", "lessThan": "1857cdca12c4aff58bf26a7005a4d02850c29927", "status": "affected", "versionType": "git"}, {"version": "ee841d0aff649164080e445e84885015958d8ff4", "lessThan": "91eda032eb16e5d2be27c95584665bc555bb5a90", "status": "affected", "versionType": "git"}, {"version": "ee841d0aff649164080e445e84885015958d8ff4", "lessThan": "dc766c4830a7e1e1ee9d7f77d4ab344f2eb23c8e", "status": "affected", "versionType": "git"}, {"version": "ee841d0aff649164080e445e84885015958d8ff4", "lessThan": "5ef9c94d7110e90260c06868cf1dcf899b9f25ee", "status": "affected", "versionType": "git"}, {"version": "ee841d0aff649164080e445e84885015958d8ff4", "lessThan": "e50377c6b3f278c9f3ef017ffce17f5fcc9dace4", "status": "affected", "versionType": "git"}, {"version": "ee841d0aff649164080e445e84885015958d8ff4", "lessThan": "47b49c06eb62504075f0f2e2227aee2e2c2a58b3", "status": "affected", "versionType": "git"}, {"version": "1c7e17b1c4d60cc5aa575460f7efb73686dd3b39", "status": "affected", "versionType": "git"}, {"version": "ac663c54f40b2830b1ca32d1ae9d683fe248b14c", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/sparc/lib/U3memcpy.S"], "versions": [{"version": "4.9", "status": "affected"}, {"version": "0", "lessThan": "4.9", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.301", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.246", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.195", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.156", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.112", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.53", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.17.3", "lessThanOrEqual": "6.17.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18", "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": "4.9", "versionEndExcluding": "5.4.301"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "5.10.246"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "5.15.195"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "6.1.156"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "6.6.112"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "6.12.53"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "6.17.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "6.18"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4.34"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8.10"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/fdd43fe6d286f27b826572457a89c926f97e2d3a"}, {"url": "https://git.kernel.org/stable/c/1198077606aeffb102587c6ea079ce99641c99d4"}, {"url": "https://git.kernel.org/stable/c/1857cdca12c4aff58bf26a7005a4d02850c29927"}, {"url": "https://git.kernel.org/stable/c/91eda032eb16e5d2be27c95584665bc555bb5a90"}, {"url": "https://git.kernel.org/stable/c/dc766c4830a7e1e1ee9d7f77d4ab344f2eb23c8e"}, {"url": "https://git.kernel.org/stable/c/5ef9c94d7110e90260c06868cf1dcf899b9f25ee"}, {"url": "https://git.kernel.org/stable/c/e50377c6b3f278c9f3ef017ffce17f5fcc9dace4"}, {"url": "https://git.kernel.org/stable/c/47b49c06eb62504075f0f2e2227aee2e2c2a58b3"}], "title": "sparc: fix accurate exception reporting in copy_{from_to}_user for UltraSPARC III", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsparc: fix accurate exception reporting in copy_{from_to}_user for UltraSPARC III\n\nAnthony Yznaga tracked down that a BUG_ON in ext4 code with large folios\nenabled resulted from copy_from_user() returning impossibly large values\ngreater than the size to be copied. This lead to __copy_from_iter()\nreturning impossible values instead of the actual number of bytes it was\nable to copy.\n\nThe BUG_ON has been reported in\nhttps://lore.kernel.org/r/b14f55642207e63e907965e209f6323a0df6dcee.camel@physik.fu-berlin.de\n\nThe referenced commit introduced exception handlers on user-space memory\nreferences in copy_from_user and copy_to_user. These handlers return from\nthe respective function and calculate the remaining bytes left to copy\nusing the current register contents. The exception handlers expect that\n%o2 has already been masked during the bulk copy loop, but the masking was\nperformed after that loop. This will fix the return value of copy_from_user\nand copy_to_user in the faulting case. The behaviour of memcpy stays\nunchanged."}], "id": "CVE-2025-40124", "lastModified": "2026-04-15T00:35:42.020", "metrics": {}, "published": "2025-11-12T11:15:41.920", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1198077606aeffb102587c6ea079ce99641c99d4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1857cdca12c4aff58bf26a7005a4d02850c29927"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/47b49c06eb62504075f0f2e2227aee2e2c2a58b3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5ef9c94d7110e90260c06868cf1dcf899b9f25ee"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/91eda032eb16e5d2be27c95584665bc555bb5a90"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/dc766c4830a7e1e1ee9d7f77d4ab344f2eb23c8e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e50377c6b3f278c9f3ef017ffce17f5fcc9dace4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fdd43fe6d286f27b826572457a89c926f97e2d3a"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Deferred"}

{"bugzilla": {"description": "kernel: sparc: fix accurate exception reporting in copy_{from_to}_user for UltraSPARC III", "id": "2414499", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2414499"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nsparc: fix accurate exception reporting in copy_{from_to}_user for UltraSPARC III\nAnthony Yznaga tracked down that a BUG_ON in ext4 code with large folios\nenabled resulted from copy_from_user() returning impossibly large values\ngreater than the size to be copied. This lead to __copy_from_iter()\nreturning impossible values instead of the actual number of bytes it was\nable to copy.\nThe BUG_ON has been reported in\nhttps://lore.kernel.org/r/b14f55642207e63e907965e209f6323a0df6dcee.camel@physik.fu-berlin.de\nThe referenced commit introduced exception handlers on user-space memory\nreferences in copy_from_user and copy_to_user. These handlers return from\nthe respective function and calculate the remaining bytes left to copy\nusing the current register contents. The exception handlers expect that\n%o2 has already been masked during the bulk copy loop, but the masking was\nperformed after that loop. This will fix the return value of copy_from_user\nand copy_to_user in the faulting case. The behaviour of memcpy stays\nunchanged."], "name": "CVE-2025-40124", "public_date": "2025-11-12T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-40124\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-40124\nhttps://lore.kernel.org/linux-cve-announce/2025111253-CVE-2025-40124-5006@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-11-12T22:12:33.104696+00:00", "updated": "2025-11-12T22:12:33.104720+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}