CVE-2026-72155

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Indeed, in this case, we unlock everything, so the TB bit does not\nmatter. However in the current implementation, use_top would be true (as\nthis is the favourite option) and lock_len, which in practice should be\nreduced down to 0, is set to \"nor->params->size - (ofs + len)\" which is\na positive number. This is wrong.\n\nAn easy way is to simply add an extra condition. In the unlock() path,\nif we can achieve the same result from both sides, it means we unlock\neverything and lock_len must simply be 0. 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Indeed, in this case, we unlock everything, so the TB bit does not\nmatter. However in the current implementation, use_top would be true (as\nthis is the favourite option) and lock_len, which in practice should be\nreduced down to 0, is set to \"nor->params->size - (ofs + len)\" which is\na positive number. This is wrong.\n\nAn easy way is to simply add an extra condition. In the unlock() path,\nif we can achieve the same result from both sides, it means we unlock\neverything and lock_len must simply be 0. A comment is added to clarify\nthat logic."}], "id": "CVE-2026-72155", "lastModified": "2026-11-06T17:19:38.387", "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-72155", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-06T16:52:08.433405Z", "version": "2.0.3"}}]}, "published": "2026-08-15T06:21:33.250", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/12d4d69221159e6d0e72400ec81195d691169b53"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/23c285be8f6fcde9088fe12bb69c701d46696be1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6110ab5ffd84e8daa654652446a03ce2f77580a7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9a0d8dec3d11ca95d67537ea8fa6ee2730a5038a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a6fd2145c73b80bb6a5eed7355a4f63597d712d9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c0806df5cf806545160f3fdac3c888926ceac557"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/dc341272cf8e15a2c511db3c4df5dab8adf70ad0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e1d456b26bf23e30db305a6184e8abd9ab68bbf2"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: mtd: spi-nor: swp: Improve locking user experience", "id": "2516268", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516268"}, "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"}, "cwe": "CWE-130", "details": ["A flaw was found in the Linux kernel's `mtd: spi-nor: swp` component. When a user attempts to unlock specific blocks on a Serial Peripheral Interface (SPI) NOR flash device, particularly those at the beginning of the device, the operation may fail. This occurs due to an incorrect calculation of the `lock_len` parameter, which prevents the intended blocks from being unlocked. The consequence is that the user's request to unlock certain flash memory regions is not properly executed, potentially leading to unexpected device behavior or operational limitations."], "name": "CVE-2026-72155", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-72155\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-72155\nhttps://lore.kernel.org/linux-cve-announce/2026081535-CVE-2026-72155-8ba3@gregkh/T"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[3dd8012a8eeb3702fa17450ec1a16a3f38af138d,9a0d8dec3d11ca95d67537ea8fa6ee2730a5038a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[3dd8012a8eeb3702fa17450ec1a16a3f38af138d,dc341272cf8e15a2c511db3c4df5dab8adf70ad0)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[3dd8012a8eeb3702fa17450ec1a16a3f38af138d,6110ab5ffd84e8daa654652446a03ce2f77580a7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[3dd8012a8eeb3702fa17450ec1a16a3f38af138d,c0806df5cf806545160f3fdac3c888926ceac557)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[3dd8012a8eeb3702fa17450ec1a16a3f38af138d,12d4d69221159e6d0e72400ec81195d691169b53)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[3dd8012a8eeb3702fa17450ec1a16a3f38af138d,e1d456b26bf23e30db305a6184e8abd9ab68bbf2)"}}], "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": "semver", "value": "4.6"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,4.6)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.178,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.145,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.97,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.40,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2-rc1,*]"}}], "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": "2026-08-15T14:30:10.286706+00:00", "title": "Failure to Unlock Locked SPI-NOR Flash Blocks Causes Device-Local Denial of Service", "updated": "2026-08-18T04:30:06.705694+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}