CVE-2026-99057

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-99057", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.388Z", "datePublished": "2026-10-23T12:22:44.683Z", "dateUpdated": "2026-10-30T12:41:23.425Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:41:23.425Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxen/netfront: don't leak the skb when xennet_fill_frags() fails\n\nWhen a response chain has more slots than fit in the skb's frags,\nxennet_fill_frags() returns an error and xennet_poll() jumps to its\nerror path. That path moves what's left on tmpq to errq to be freed,\nbut the skb being filled was already dequeued from tmpq, so it's never\nfreed. Each chain that overflows leaks the skb and the pages attached\nto it as frags, and the backend decides how many slots it sends.\n\nPut the skb back on tmpq before taking the error path, like the\nxennet_set_skb_gso() failure just above it does."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/xen-netfront.c"], "versions": [{"version": "ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c", "lessThan": "6e6bd1051daabc327233c3ca3d00613fc6783c8e", "status": "affected", "versionType": "git"}, {"version": "ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c", "lessThan": "0cf0a25a639c535146c5eb4480d256995721aed6", "status": "affected", "versionType": "git"}, {"version": "ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c", "lessThan": "53a131eb2a998c77e2851401b32b712d6c6e8487", "status": "affected", "versionType": "git"}, {"version": "ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c", "lessThan": "5051df031144753d3e18862514969146b601d089", "status": "affected", "versionType": "git"}, {"version": "ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c", "lessThan": "99011a11c97340ef7290df7dc199305c73fab2f2", "status": "affected", "versionType": "git"}, {"version": "ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c", "lessThan": "086944c1c2cbb683543bc3ff08637847b03c8009", "status": "affected", "versionType": "git"}, {"version": "ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c", "lessThan": "84e3ea6502b5f14ce8d499d0b6e0e38386274cf0", "status": "affected", "versionType": "git"}, {"version": "ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c", "lessThan": "93ccaf1c26e2133396173b76a071e59024daa622", "status": "affected", "versionType": "git"}, {"version": "bd1468048aa3e2af865da92990539946d4483989", "status": "affected", "versionType": "git"}, {"version": "29a6193c0d74390c004808441061ac1812cf6f51", "status": "affected", "versionType": "git"}, {"version": "7eced4478f4ec6ff0a603ddfd6e24a5d3831fca7", "status": "affected", "versionType": "git"}, {"version": "b73a161e9beff24bf1803ba393dff95a255268f9", "status": "affected", "versionType": "git"}, {"version": "4.4.159", "lessThan": "4.5", "status": "affected", "versionType": "semver"}, {"version": "4.9.130", "lessThan": "4.10", "status": "affected", "versionType": "semver"}, {"version": "4.14.73", "lessThan": "4.15", "status": "affected", "versionType": "semver"}, {"version": "4.18.11", "lessThan": "4.19", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/xen-netfront.c"], "versions": [{"version": "4.19", "status": "affected"}, {"version": "0", "lessThan": "4.19", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.273", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.224", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.113", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.57", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.11", "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": "4.19", "versionEndExcluding": "5.10.273"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "5.15.224"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "6.12.113"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "6.18.57"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "7.2.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "7.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4.159"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9.130"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14.73"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18.11"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/6e6bd1051daabc327233c3ca3d00613fc6783c8e"}, {"url": "https://git.kernel.org/stable/c/0cf0a25a639c535146c5eb4480d256995721aed6"}, {"url": "https://git.kernel.org/stable/c/53a131eb2a998c77e2851401b32b712d6c6e8487"}, {"url": "https://git.kernel.org/stable/c/5051df031144753d3e18862514969146b601d089"}, {"url": "https://git.kernel.org/stable/c/99011a11c97340ef7290df7dc199305c73fab2f2"}, {"url": "https://git.kernel.org/stable/c/086944c1c2cbb683543bc3ff08637847b03c8009"}, {"url": "https://git.kernel.org/stable/c/84e3ea6502b5f14ce8d499d0b6e0e38386274cf0"}, {"url": "https://git.kernel.org/stable/c/93ccaf1c26e2133396173b76a071e59024daa622"}], "title": "xen/netfront: don't leak the skb when xennet_fill_frags() fails", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/net/xen-netfront.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "6e6bd1051daabc327233c3ca3d00613fc6783c8e", "status": "affected", "version": "ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c", "versionType": "git"}, {"lessThan": "0cf0a25a639c535146c5eb4480d256995721aed6", "status": "affected", "version": "ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c", "versionType": "git"}, {"lessThan": "53a131eb2a998c77e2851401b32b712d6c6e8487", "status": "affected", "version": "ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c", "versionType": "git"}, {"lessThan": "5051df031144753d3e18862514969146b601d089", "status": "affected", "version": "ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c", "versionType": "git"}, {"lessThan": "99011a11c97340ef7290df7dc199305c73fab2f2", "status": "affected", "version": "ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c", "versionType": "git"}, {"lessThan": "086944c1c2cbb683543bc3ff08637847b03c8009", "status": "affected", "version": "ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c", "versionType": "git"}, {"lessThan": "84e3ea6502b5f14ce8d499d0b6e0e38386274cf0", "status": "affected", "version": "ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c", "versionType": "git"}, {"lessThan": "93ccaf1c26e2133396173b76a071e59024daa622", "status": "affected", "version": "ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c", "versionType": "git"}, {"status": "affected", "version": "bd1468048aa3e2af865da92990539946d4483989", "versionType": "git"}, {"status": "affected", "version": "29a6193c0d74390c004808441061ac1812cf6f51", "versionType": "git"}, {"status": "affected", "version": "7eced4478f4ec6ff0a603ddfd6e24a5d3831fca7", "versionType": "git"}, {"status": "affected", "version": "b73a161e9beff24bf1803ba393dff95a255268f9", "versionType": "git"}, {"lessThan": "4.5", "status": "affected", "version": "4.4.159", "versionType": "semver"}, {"lessThan": "4.10", "status": "affected", "version": "4.9.130", "versionType": "semver"}, {"lessThan": "4.15", "status": "affected", "version": "4.14.73", "versionType": "semver"}, {"lessThan": "4.19", "status": "affected", "version": "4.18.11", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/net/xen-netfront.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.19"}, {"lessThan": "4.19", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.273", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.224", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.113", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.57", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.11", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxen/netfront: don't leak the skb when xennet_fill_frags() fails\n\nWhen a response chain has more slots than fit in the skb's frags,\nxennet_fill_frags() returns an error and xennet_poll() jumps to its\nerror path. That path moves what's left on tmpq to errq to be freed,\nbut the skb being filled was already dequeued from tmpq, so it's never\nfreed. Each chain that overflows leaks the skb and the pages attached\nto it as frags, and the backend decides how many slots it sends.\n\nPut the skb back on tmpq before taking the error path, like the\nxennet_set_skb_gso() failure just above it does."}], "id": "CVE-2026-99057", "lastModified": "2026-10-30T13:21:42.453", "metrics": {}, "published": "2026-10-23T13:17:29.373", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/086944c1c2cbb683543bc3ff08637847b03c8009"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0cf0a25a639c535146c5eb4480d256995721aed6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5051df031144753d3e18862514969146b601d089"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/53a131eb2a998c77e2851401b32b712d6c6e8487"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6e6bd1051daabc327233c3ca3d00613fc6783c8e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/84e3ea6502b5f14ce8d499d0b6e0e38386274cf0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/93ccaf1c26e2133396173b76a071e59024daa622"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/99011a11c97340ef7290df7dc199305c73fab2f2"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: xen/netfront: don't leak the skb when xennet_fill_frags() fails", "id": "2559743", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2559743"}, "csaw": false, "cvss3": {"cvss3_base_score": "2.3", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L", "status": "draft"}, "cwe": "CWE-772", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nxen/netfront: don't leak the skb when xennet_fill_frags() fails\nWhen a response chain has more slots than fit in the skb's frags,\nxennet_fill_frags() returns an error and xennet_poll() jumps to its\nerror path. That path moves what's left on tmpq to errq to be freed,\nbut the skb being filled was already dequeued from tmpq, so it's never\nfreed. Each chain that overflows leaks the skb and the pages attached\nto it as frags, and the backend decides how many slots it sends.\nPut the skb back on tmpq before taking the error path, like the\nxennet_set_skb_gso() failure just above it does.", "A flaw was found in the Linux kernel's Xen network frontend driver. When processing a network response chain that exceeds the allocated buffer capacity, an error handling failure prevents the socket buffer and associated memory pages from being freed. A malicious or compromised backend can exploit this flaw by sending oversized response chains, leading to a memory leak and a Denial of Service (DoS) through resource exhaustion."], "name": "CVE-2026-99057", "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": "Out of support scope", "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"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-10-23T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-99057\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-99057\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-99057.mbox"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c,5051df031144753d3e18862514969146b601d089)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c,99011a11c97340ef7290df7dc199305c73fab2f2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c,086944c1c2cbb683543bc3ff08637847b03c8009)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c,84e3ea6502b5f14ce8d499d0b6e0e38386274cf0)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c,93ccaf1c26e2133396173b76a071e59024daa622)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "bd1468048aa3e2af865da92990539946d4483989"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "29a6193c0d74390c004808441061ac1812cf6f51"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "7eced4478f4ec6ff0a603ddfd6e24a5d3831fca7"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "b73a161e9beff24bf1803ba393dff95a255268f9"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[4.4.159,4.5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[4.9.130,4.10)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[4.14.73,4.15)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[4.18.11,4.19)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, 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