{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-97993", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:18:58.209Z", "datePublished": "2026-09-25T10:23:25.110Z", "dateUpdated": "2026-10-19T09:12:00.172Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:12:00.172Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvhost-vdpa: don't install the eventfd_ctx_fdget() error in config_ctx\n\nvhost_vdpa_set_config_call() swaps the eventfd_ctx_fdget() return value\ninto v->config_ctx before checking it, so on failure the field briefly\nholds an ERR_PTR:\n\n\tctx = fd == VHOST_FILE_UNBIND ? NULL : eventfd_ctx_fdget(fd);\n\tswap(ctx, v->config_ctx);\n\n\tif (!IS_ERR_OR_NULL(ctx))\n\t\teventfd_ctx_put(ctx);\n\n\tif (IS_ERR(v->config_ctx)) {\n\t\tlong ret = PTR_ERR(v->config_ctx);\n\n\t\tv->config_ctx = NULL;\n\t\treturn ret;\n\t}\n\nCommit 0bde59c1723a (\"vhost-vdpa: set v->config_ctx to NULL if\neventfd_ctx_fdget() fails\") added that clearing, and spelled out the\ninvariant the rest of the file relies on: \"we consider 'v->config_ctx'\nvalid if it is not NULL\". The window between the swap and the clearing\nstill breaks it. vhost_vdpa_config_cb() only tests for NULL, so a config\ninterrupt delivered inside the window hands the ERR_PTR to\neventfd_signal().\n\nCheck the fd before installing it instead. That closes the window and\nmatches how vhost_vring_ioctl() handles the same failure for the vq call\nfd.\n\nIt also stops a rejected fd from tearing down a config interrupt that was\nworking: until now the swap replaced the live context and put it, so\nafter an EBADF the device silently stopped delivering config interrupts\nuntil userspace installed a new fd." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/vhost/vdpa.c" ], "versions": [ { "version": "776f395004d829bbbf18c159ed9beb517a208c71", "lessThan": "e260dc9fbfdae0978e7a8698f977fbb463a657be", "status": "affected", "versionType": "git" }, { "version": "776f395004d829bbbf18c159ed9beb517a208c71", "lessThan": "66e73fa18910b39fea0941dea5fe091122240855", "status": "affected", "versionType": "git" }, { "version": "776f395004d829bbbf18c159ed9beb517a208c71", "lessThan": "4fde085eb839fbb39c25cbba5d2a091ded394877", "status": "affected", "versionType": "git" }, { "version": "776f395004d829bbbf18c159ed9beb517a208c71", "lessThan": "59fc7c1c6b4d325194ca45352180340092d95098", "status": "affected", "versionType": "git" }, { "version": "776f395004d829bbbf18c159ed9beb517a208c71", "lessThan": "388c678639a0cebfd936b3e56c64ac6a371efec2", "status": "affected", "versionType": "git" }, { "version": "776f395004d829bbbf18c159ed9beb517a208c71", "lessThan": "65faf9eaa00e408e1406fbcf675c8c8d0e27ff2a", "status": "affected", "versionType": "git" }, { "version": "776f395004d829bbbf18c159ed9beb517a208c71", "lessThan": "6b20b40f020bde236f6b8a08ff88d8653261ec2b", "status": "affected", "versionType": "git" }, { "version": "776f395004d829bbbf18c159ed9beb517a208c71", "lessThan": "e74a9fa50749b9940b4fb13199652325e08d3c4a", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/vhost/vdpa.c" ], "versions": [ { "version": "5.8", "status": "affected" }, { "version": "0", "lessThan": "5.8", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.271", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.222", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.189", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.158", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.111", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.53", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2.7", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.3", "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": "5.8", "versionEndExcluding": "5.10.271" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "5.15.222" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "6.1.189" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "6.6.158" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "6.12.111" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "6.18.53" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "7.2.7" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "7.3" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/e260dc9fbfdae0978e7a8698f977fbb463a657be" }, { "url": "https://git.kernel.org/stable/c/66e73fa18910b39fea0941dea5fe091122240855" }, { "url": "https://git.kernel.org/stable/c/4fde085eb839fbb39c25cbba5d2a091ded394877" }, { "url": "https://git.kernel.org/stable/c/59fc7c1c6b4d325194ca45352180340092d95098" }, { "url": "https://git.kernel.org/stable/c/388c678639a0cebfd936b3e56c64ac6a371efec2" }, { "url": "https://git.kernel.org/stable/c/65faf9eaa00e408e1406fbcf675c8c8d0e27ff2a" }, { "url": "https://git.kernel.org/stable/c/6b20b40f020bde236f6b8a08ff88d8653261ec2b" }, { "url": "https://git.kernel.org/stable/c/e74a9fa50749b9940b4fb13199652325e08d3c4a" } ], "title": "vhost-vdpa: don't install the eventfd_ctx_fdget() error in config_ctx", "x_generator": { "engine": "bippy-1.2.0" } } } }