{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64596", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T15:36:31.799Z", "datePublished": "2026-08-06T07:13:51.523Z", "dateUpdated": "2026-08-06T07:13:51.523Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-06T07:13:51.523Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nlibfs: set SB_I_NOEXEC and SB_I_NODEV by default in init_pseudo()\n\nSince commit 1e7ab6f67824 (\"anon_inode: rework assertions\"),\npath_noexec() warns when an anonymous-inode file is mmap'd from a\nsuperblock that has not set SB_I_NOEXEC. dma-buf backs its files this\nway and never set the flag, so mmap of any exported buffer trips the\nwarning on a CONFIG_DEBUG_VFS=y kernel:\n\n WARNING: CPU: 11 PID: 121813 at fs/exec.c:118 path_noexec+0x47/0x50\n do_mmap+0x2b5/0x680\n vm_mmap_pgoff+0x129/0x210\n ksys_mmap_pgoff+0x177/0x240\n __x64_sys_mmap+0x33/0x70\n\ninit_pseudo() sets up internal SB_NOUSER mounts that are never\npath-reachable. Set both flags here so every pseudo filesystem gets\nthem by default instead of each caller setting them.\n\nSB_I_NODEV is inert for unreachable mounts. SB_I_NOEXEC has one\nvisible effect: an executable mapping of a pseudo-fs fd, such as a\ndma-buf, now fails with -EPERM, which is the invariant the assertion\nenforces. No in-tree caller maps these executable.\n\nReproduce on CONFIG_DEBUG_VFS=y:\n\n make -C tools/testing/selftests/dmabuf-heaps\n sudo ./tools/testing/selftests/dmabuf-heaps/dmabuf-heap -t system"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/libfs.c"], "versions": [{"version": "1e7ab6f67824343ee3e96f100f0937c393749a8a", "lessThan": "b9d45d328fcda4f0d3d281b7d6f12d3f181d9381", "status": "affected", "versionType": "git"}, {"version": "1e7ab6f67824343ee3e96f100f0937c393749a8a", "lessThan": "8e931557b317f0fb414839fa51fae1d5feb0ad97", "status": "affected", "versionType": "git"}, {"version": "1e7ab6f67824343ee3e96f100f0937c393749a8a", "lessThan": "6de2aeffabaafaeda819e60ec8d04f199711e11a", "status": "affected", "versionType": "git"}, {"version": "9b8076a9404568d6cb6673b9a079558b15051966", "status": "affected", "versionType": "git"}, {"version": "6.15.6", "lessThan": "6.16", "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/libfs.c"], "versions": [{"version": "6.16", "status": "affected"}, {"version": "0", "lessThan": "6.16", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.39", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.4", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2-rc1", "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": "6.16", "versionEndExcluding": "6.18.39"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "7.1.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "7.2-rc1"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15.6"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/b9d45d328fcda4f0d3d281b7d6f12d3f181d9381"}, {"url": "https://git.kernel.org/stable/c/8e931557b317f0fb414839fa51fae1d5feb0ad97"}, {"url": "https://git.kernel.org/stable/c/6de2aeffabaafaeda819e60ec8d04f199711e11a"}], "title": "libfs: set SB_I_NOEXEC and SB_I_NODEV by default in init_pseudo()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1e7ab6f67824343ee3e96f100f0937c393749a8a,b9d45d328fcda4f0d3d281b7d6f12d3f181d9381)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1e7ab6f67824343ee3e96f100f0937c393749a8a,8e931557b317f0fb414839fa51fae1d5feb0ad97)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1e7ab6f67824343ee3e96f100f0937c393749a8a,6de2aeffabaafaeda819e60ec8d04f199711e11a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "9b8076a9404568d6cb6673b9a079558b15051966"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.15.6,6.16)"}}], "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": "generic", "value": "6.16"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.16)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.39,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.4,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "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": "2026-08-06T10:00:05.755744+00:00", "updated": "2026-08-06T10:00:05.967088+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}