{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-43495", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-01T14:12:56.013Z", "datePublished": "2026-05-21T12:12:45.988Z", "dateUpdated": "2026-05-21T12:12:45.988Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-21T12:12:45.988Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: wwan: t7xx: validate port_count against message length in t7xx_port_enum_msg_handler\n\nt7xx_port_enum_msg_handler() uses the modem-supplied port_count field as\na loop bound over port_msg->data[] without checking that the message buffer\ncontains sufficient data. A modem sending port_count=65535 in a 12-byte\nbuffer triggers a slab-out-of-bounds read of up to 262140 bytes.\n\nAdd a sizeof(*port_msg) check before accessing the port message header\nfields to guard against undersized messages.\n\nAdd a struct_size() check after extracting port_count and before the loop.\n\nIn t7xx_parse_host_rt_data(), guard the rt_feature header read with a\nremaining-buffer check before accessing data_len, validate feat_data_len\nagainst the actual remaining buffer to prevent OOB reads and signed\ninteger overflow on offset.\n\nPass msg_len from both call sites: skb->len at the DPMAIF path after\nskb_pull(), and the validated feat_data_len at the handshake path."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/wwan/t7xx/t7xx_modem_ops.c", "drivers/net/wwan/t7xx/t7xx_port_ctrl_msg.c", "drivers/net/wwan/t7xx/t7xx_port_proxy.h"], "versions": [{"version": "da45d2566a1d4e260b894ff5d96be64b21c7fa79", "lessThan": "f94450ce5053b36002995b72d1fa1db3bb08c5bf", "status": "affected", "versionType": "git"}, {"version": "da45d2566a1d4e260b894ff5d96be64b21c7fa79", "lessThan": "9855e063e063158cc5bded576382599dc3133202", "status": "affected", "versionType": "git"}, {"version": "da45d2566a1d4e260b894ff5d96be64b21c7fa79", "lessThan": "2b56d7903ab804481f5233a259d5f341e9fd513c", "status": "affected", "versionType": "git"}, {"version": "da45d2566a1d4e260b894ff5d96be64b21c7fa79", "lessThan": "dd4f4c93c1488d7100b9964f2da4c8b3c29652f1", "status": "affected", "versionType": "git"}, {"version": "da45d2566a1d4e260b894ff5d96be64b21c7fa79", "lessThan": "0e7c074cfcd9bd93765505f9eb8b42f03ed2a744", "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/wwan/t7xx/t7xx_modem_ops.c", "drivers/net/wwan/t7xx/t7xx_port_ctrl_msg.c", "drivers/net/wwan/t7xx/t7xx_port_proxy.h"], "versions": [{"version": "5.19", "status": "affected"}, {"version": "0", "lessThan": "5.19", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.140", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.88", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.30", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.7", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1-rc3", "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": "5.19", "versionEndExcluding": "6.6.140"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.12.88"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.18.30"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "7.0.7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "7.1-rc3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/f94450ce5053b36002995b72d1fa1db3bb08c5bf"}, {"url": "https://git.kernel.org/stable/c/9855e063e063158cc5bded576382599dc3133202"}, {"url": "https://git.kernel.org/stable/c/2b56d7903ab804481f5233a259d5f341e9fd513c"}, {"url": "https://git.kernel.org/stable/c/dd4f4c93c1488d7100b9964f2da4c8b3c29652f1"}, {"url": "https://git.kernel.org/stable/c/0e7c074cfcd9bd93765505f9eb8b42f03ed2a744"}], "title": "net: wwan: t7xx: validate port_count against message length in t7xx_port_enum_msg_handler", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: wwan: t7xx: validate port_count against message length in t7xx_port_enum_msg_handler\n\nt7xx_port_enum_msg_handler() uses the modem-supplied port_count field as\na loop bound over port_msg->data[] without checking that the message buffer\ncontains sufficient data. A modem sending port_count=65535 in a 12-byte\nbuffer triggers a slab-out-of-bounds read of up to 262140 bytes.\n\nAdd a sizeof(*port_msg) check before accessing the port message header\nfields to guard against undersized messages.\n\nAdd a struct_size() check after extracting port_count and before the loop.\n\nIn t7xx_parse_host_rt_data(), guard the rt_feature header read with a\nremaining-buffer check before accessing data_len, validate feat_data_len\nagainst the actual remaining buffer to prevent OOB reads and signed\ninteger overflow on offset.\n\nPass msg_len from both call sites: skb->len at the DPMAIF path after\nskb_pull(), and the validated feat_data_len at the handshake path."}], "id": "CVE-2026-43495", "lastModified": "2026-05-21T13:16:18.847", "metrics": {}, "published": "2026-05-21T13:16:18.847", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0e7c074cfcd9bd93765505f9eb8b42f03ed2a744"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2b56d7903ab804481f5233a259d5f341e9fd513c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9855e063e063158cc5bded576382599dc3133202"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/dd4f4c93c1488d7100b9964f2da4c8b3c29652f1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f94450ce5053b36002995b72d1fa1db3bb08c5bf"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: net: wwan: t7xx: validate port_count against message length in t7xx_port_enum_msg_handler", "id": "2480452", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2480452"}, "csaw": false, "cwe": "CWE-1284", "details": ["A flaw was found in the Linux kernel, specifically within the net: wwan: t7xx module. A malicious modem could exploit this vulnerability by sending a specially crafted message with an invalid port_count value. This could lead to a slab-out-of-bounds read, potentially allowing an attacker to access sensitive information or cause a system crash (Denial of Service)."], "name": "CVE-2026-43495", "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": "Not affected", "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": "2026-05-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-43495\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43495\nhttps://lore.kernel.org/linux-cve-announce/2026052155-CVE-2026-43495-9b17@gregkh/T"]}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[da45d2566a1d4e260b894ff5d96be64b21c7fa79,f94450ce5053b36002995b72d1fa1db3bb08c5bf)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[da45d2566a1d4e260b894ff5d96be64b21c7fa79,9855e063e063158cc5bded576382599dc3133202)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[da45d2566a1d4e260b894ff5d96be64b21c7fa79,2b56d7903ab804481f5233a259d5f341e9fd513c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[da45d2566a1d4e260b894ff5d96be64b21c7fa79,dd4f4c93c1488d7100b9964f2da4c8b3c29652f1)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[da45d2566a1d4e260b894ff5d96be64b21c7fa79,0e7c074cfcd9bd93765505f9eb8b42f03ed2a744)"}}], "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": "semver", "value": "5.19"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,5.19)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.140,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.88,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.30,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.7,7.1.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1-rc3,*]"}}], "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": "2026-05-21T14:00:12.072671+00:00", "updated": "2026-05-22T01:30:23.794295+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-120", "CWE-1284"]}