248 lines
12 KiB
JSON
248 lines
12 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-97993",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-09-25T10:18:58.209Z",
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"datePublished": "2026-09-25T10:23:25.110Z",
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"dateUpdated": "2026-10-19T09:12:00.172Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-10-19T09:12:00.172Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"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."
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/vhost/vdpa.c"
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],
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"versions": [
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{
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"version": "776f395004d829bbbf18c159ed9beb517a208c71",
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"lessThan": "e260dc9fbfdae0978e7a8698f977fbb463a657be",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "776f395004d829bbbf18c159ed9beb517a208c71",
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"lessThan": "66e73fa18910b39fea0941dea5fe091122240855",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "776f395004d829bbbf18c159ed9beb517a208c71",
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"lessThan": "4fde085eb839fbb39c25cbba5d2a091ded394877",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "776f395004d829bbbf18c159ed9beb517a208c71",
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"lessThan": "59fc7c1c6b4d325194ca45352180340092d95098",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "776f395004d829bbbf18c159ed9beb517a208c71",
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"lessThan": "388c678639a0cebfd936b3e56c64ac6a371efec2",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "776f395004d829bbbf18c159ed9beb517a208c71",
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"lessThan": "65faf9eaa00e408e1406fbcf675c8c8d0e27ff2a",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "776f395004d829bbbf18c159ed9beb517a208c71",
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"lessThan": "6b20b40f020bde236f6b8a08ff88d8653261ec2b",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "776f395004d829bbbf18c159ed9beb517a208c71",
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"lessThan": "e74a9fa50749b9940b4fb13199652325e08d3c4a",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/vhost/vdpa.c"
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],
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"versions": [
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{
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"version": "5.8",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "5.8",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.10.271",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.222",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.189",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.158",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.111",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.53",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2.7",
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"lessThanOrEqual": "7.2.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.3",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.8",
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"versionEndExcluding": "5.10.271"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.8",
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"versionEndExcluding": "5.15.222"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.8",
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"versionEndExcluding": "6.1.189"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.8",
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"versionEndExcluding": "6.6.158"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.8",
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"versionEndExcluding": "6.12.111"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.8",
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"versionEndExcluding": "6.18.53"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.8",
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"versionEndExcluding": "7.2.7"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.8",
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"versionEndExcluding": "7.3"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/e260dc9fbfdae0978e7a8698f977fbb463a657be"
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},
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{
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"url": "https://git.kernel.org/stable/c/66e73fa18910b39fea0941dea5fe091122240855"
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},
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{
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"url": "https://git.kernel.org/stable/c/4fde085eb839fbb39c25cbba5d2a091ded394877"
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},
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{
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"url": "https://git.kernel.org/stable/c/59fc7c1c6b4d325194ca45352180340092d95098"
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},
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{
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"url": "https://git.kernel.org/stable/c/388c678639a0cebfd936b3e56c64ac6a371efec2"
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},
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{
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"url": "https://git.kernel.org/stable/c/65faf9eaa00e408e1406fbcf675c8c8d0e27ff2a"
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},
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{
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"url": "https://git.kernel.org/stable/c/6b20b40f020bde236f6b8a08ff88d8653261ec2b"
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},
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{
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"url": "https://git.kernel.org/stable/c/e74a9fa50749b9940b4fb13199652325e08d3c4a"
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}
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],
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"title": "vhost-vdpa: don't install the eventfd_ctx_fdget() error in config_ctx",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |