CVE-2026-52958

In the Linux kernel, the following vulnerability has been resolved: libceph: Fix potential out-of-bounds access in osdmap_decode() When decoding osd_state and osd_weight from an incoming osdmap in osdmap_decode(), both are decoded for each osd, i.e., map->max_osd times. The ceph_decode_need() check only accounts for sizeof(*map->osd_weight) once. This can potentially result in an out-of-bounds memory access if the incoming message is corrupted such that the max_osd value exceeds the actual content of the osdmap message. This patch fixes the issue by changing the corresponding part in the ceph_decode_need() check to account for map->max_osd*sizeof(*map->osd_weight).

CVSS v3 9.1 CRITICAL

9.1^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/0d2dd7e6bb74fd7712aa73457a4a821906c6863a	Patch
https://git.kernel.org/stable/c/35d0ed82d03e5ee77ea4f31f20e29562a7721649	Patch
https://git.kernel.org/stable/c/36a79759a288961b1ff28a68ec2d1f56f6848098	Patch
https://git.kernel.org/stable/c/3f2575bb7f955d42569d96c3e04fa958a0dcf4b4	Patch
https://git.kernel.org/stable/c/48df98d12b15360cd56af5c1f460307b340c1197	Patch
https://git.kernel.org/stable/c/8713bbc4b2b9ad78f803978e54b7e49dd21bd9be	Patch
https://git.kernel.org/stable/c/e7187f33c02488697ec0d01d82bf7a3f8deaba8f	Patch
https://git.kernel.org/stable/c/ee933694645dac062d65fc2743f92bc06fa0db6b	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel:7.1:rc1::::::
	cpe:2.3:o:linux:linux_kernel:7.1:rc2::::::
	cpe:2.3:o:linux:linux_kernel:7.1:rc3::::::

History

No history.

Information

Published : 2026-06-24 17:17

Updated : 2026-07-14 16:39

NVD link : CVE-2026-52958

Mitre link : CVE-2026-52958

CVE.ORG link : CVE-2026-52958

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-125

Out-of-bounds Read

{"id": "CVE-2026-52958", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.1, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.2, "exploitabilityScore": 3.9}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "dcbc919a5dc8c2629684a113a90c0b6fe10c3462", "lessThan": "36a79759a288961b1ff28a68ec2d1f56f6848098", "versionType": "git"}, {"status": "affected", "version": "dcbc919a5dc8c2629684a113a90c0b6fe10c3462", "lessThan": "3f2575bb7f955d42569d96c3e04fa958a0dcf4b4", "versionType": "git"}, {"status": "affected", "version": "dcbc919a5dc8c2629684a113a90c0b6fe10c3462", "lessThan": "8713bbc4b2b9ad78f803978e54b7e49dd21bd9be", "versionType": "git"}, {"status": "affected", "version": "dcbc919a5dc8c2629684a113a90c0b6fe10c3462", "lessThan": "0d2dd7e6bb74fd7712aa73457a4a821906c6863a", "versionType": "git"}, {"status": "affected", "version": "dcbc919a5dc8c2629684a113a90c0b6fe10c3462", "lessThan": "e7187f33c02488697ec0d01d82bf7a3f8deaba8f", "versionType": "git"}, {"status": "affected", "version": "dcbc919a5dc8c2629684a113a90c0b6fe10c3462", "lessThan": "48df98d12b15360cd56af5c1f460307b340c1197", "versionType": "git"}, {"status": "affected", "version": "dcbc919a5dc8c2629684a113a90c0b6fe10c3462", "lessThan": "ee933694645dac062d65fc2743f92bc06fa0db6b", "versionType": "git"}, {"status": "affected", "version": "dcbc919a5dc8c2629684a113a90c0b6fe10c3462", "lessThan": "35d0ed82d03e5ee77ea4f31f20e29562a7721649", "versionType": "git"}], "programFiles": ["net/ceph/osdmap.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.3"}, {"status": "unaffected", "version": "0", "lessThan": "5.3", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.258", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.209", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.175", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.141", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.91", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.33", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.0.10", "versionType": "semver", "lessThanOrEqual": "7.0.*"}, {"status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["net/ceph/osdmap.c"], "defaultStatus": "affected"}]}], "published": "2026-06-24T17:17:06.033", "references": [{"url": "https://git.kernel.org/stable/c/0d2dd7e6bb74fd7712aa73457a4a821906c6863a", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/35d0ed82d03e5ee77ea4f31f20e29562a7721649", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/36a79759a288961b1ff28a68ec2d1f56f6848098", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/3f2575bb7f955d42569d96c3e04fa958a0dcf4b4", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/48df98d12b15360cd56af5c1f460307b340c1197", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/8713bbc4b2b9ad78f803978e54b7e49dd21bd9be", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/e7187f33c02488697ec0d01d82bf7a3f8deaba8f", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/ee933694645dac062d65fc2743f92bc06fa0db6b", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-125"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: Fix potential out-of-bounds access in osdmap_decode()\n\nWhen decoding osd_state and osd_weight from an incoming osdmap in\nosdmap_decode(), both are decoded for each osd, i.e., map->max_osd\ntimes. The ceph_decode_need() check only accounts for\nsizeof(*map->osd_weight) once. This can potentially result in an\nout-of-bounds memory access if the incoming message is corrupted such\nthat the max_osd value exceeds the actual content of the osdmap message.\n\nThis patch fixes the issue by changing the corresponding part in the\nceph_decode_need() check to account for\nmap->max_osd*sizeof(*map->osd_weight)."}], "lastModified": "2026-07-14T16:39:34.343", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "24B3A7BD-AD4C-4029-A7C0-87FA0CB1BFEB", "versionEndExcluding": "5.10.258", "versionStartIncluding": "5.3"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "919C10A9-7951-4A74-BADD-C135A0A8D8B4", "versionEndExcluding": "5.15.209", "versionStartIncluding": "5.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "92385813-D91D-480D-83A1-F423D2CBB2BA", "versionEndExcluding": "6.1.175", "versionStartIncluding": "5.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "97A9FFFA-22BB-4D5C-9790-5A2286E392F7", "versionEndExcluding": "6.6.141", "versionStartIncluding": "6.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C918746B-DE6F-448F-A93E-A04C5481688D", "versionEndExcluding": "6.12.91", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "96D99E49-380D-43AB-BDBA-25C3AD018A9C", "versionEndExcluding": "6.18.33", "versionStartIncluding": "6.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A13475D2-59BF-4716-94B5-7C1D239A2CF4", "versionEndExcluding": "7.0.10", "versionStartIncluding": "6.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B1EF7059-E670-45F4-B422-54C40FA86390"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0D38F0BF-A728-4133-A358-D44A2F7EE6D6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "EC732D08-5F7B-46D9-B154-E60C7F4F0A97"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}