{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-31623", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-03-09T15:48:24.124Z", "datePublished": "2026-04-24T14:42:40.566Z", "dateUpdated": "2026-04-24T14:42:40.566Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-04-24T14:42:40.566Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: usb: cdc-phonet: fix skb frags[] overflow in rx_complete()\n\nA malicious USB device claiming to be a CDC Phonet modem can overflow\nthe skb_shared_info->frags[] array by sending an unbounded sequence of\nfull-page bulk transfers.\n\nDrop the skb and increment the length error when the frag limit is\nreached. This matches the same fix that commit f0813bcd2d9d (\"net:\nwwan: t7xx: fix potential skb->frags overflow in RX path\") did for the\nt7xx driver."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/usb/cdc-phonet.c"], "versions": [{"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "a23b1b1aaf41e174181d5853a70e65d4d01e648c", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "c183d5775129a0a7495bd61a6e57ec230dcf01e5", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "ebf75c6301c4972a87542ebf2d994c6391eb5d46", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "9989938d13cc5ba8447eeed5a61acfcf61bc6801", "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/net/usb/cdc-phonet.c"], "versions": [{"version": "6.12.83", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.24", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.14", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.1", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.12.83"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.18.24"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.19.14"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "7.0.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/a23b1b1aaf41e174181d5853a70e65d4d01e648c"}, {"url": "https://git.kernel.org/stable/c/c183d5775129a0a7495bd61a6e57ec230dcf01e5"}, {"url": "https://git.kernel.org/stable/c/ebf75c6301c4972a87542ebf2d994c6391eb5d46"}, {"url": "https://git.kernel.org/stable/c/9989938d13cc5ba8447eeed5a61acfcf61bc6801"}], "title": "net: usb: cdc-phonet: fix skb frags[] overflow in rx_complete()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: usb: cdc-phonet: fix skb frags[] overflow in rx_complete()\n\nA malicious USB device claiming to be a CDC Phonet modem can overflow\nthe skb_shared_info->frags[] array by sending an unbounded sequence of\nfull-page bulk transfers.\n\nDrop the skb and increment the length error when the frag limit is\nreached. This matches the same fix that commit f0813bcd2d9d (\"net:\nwwan: t7xx: fix potential skb->frags overflow in RX path\") did for the\nt7xx driver."}], "id": "CVE-2026-31623", "lastModified": "2026-04-24T17:51:40.810", "metrics": {}, "published": "2026-04-24T15:16:41.587", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9989938d13cc5ba8447eeed5a61acfcf61bc6801"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a23b1b1aaf41e174181d5853a70e65d4d01e648c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c183d5775129a0a7495bd61a6e57ec230dcf01e5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ebf75c6301c4972a87542ebf2d994c6391eb5d46"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: net: usb: cdc-phonet: fix skb frags[] overflow in rx_complete()", "id": "2461478", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2461478"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-120", "details": ["A flaw was found in the Linux kernel's cdc-phonet driver. A malicious USB device, pretending to be a CDC Phonet modem, can exploit this vulnerability by sending an unlimited number of large data transfers. This can cause an overflow in the kernel's internal data buffer (skb_shared_info->frags[] array), leading to a Denial of Service (DoS) condition where the system may become unresponsive or crash."], "name": "CVE-2026-31623", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Under investigation", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-04-24T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-31623\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-31623\nhttps://lore.kernel.org/linux-cve-announce/2026042426-CVE-2026-31623-64d8@gregkh/T"], "threat_severity": "Important"}

{}