CVE-2026-74263

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-74263", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.877Z", "datePublished": "2026-08-15T05:57:39.660Z", "dateUpdated": "2026-08-17T05:16:05.593Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:16:05.593Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: wwan: t7xx: check skb_clone in control TX\n\nt7xx_port_ctrl_tx() clones each skb fragment before passing it to the\nport transmit path. The clone is used immediately to set cloned->len, so\nan skb_clone() failure results in a NULL pointer dereference.\n\nCheck the clone before using it. If previous fragments were already\nqueued, preserve the driver's existing partial-write behavior by\nreturning the number of bytes submitted so far."}], "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_port_wwan.c"], "versions": [{"version": "36bd28c1cb0dbf48645cfe43159907fb3253b33a", "lessThan": "7edd4db82f9429591de10be4c904c817f12ba029", "status": "affected", "versionType": "git"}, {"version": "36bd28c1cb0dbf48645cfe43159907fb3253b33a", "lessThan": "112490467586146d323cb7230b1d72137e36900c", "status": "affected", "versionType": "git"}, {"version": "36bd28c1cb0dbf48645cfe43159907fb3253b33a", "lessThan": "f7aebaee2961bfcb86f282202d3dbd9b69db1a7c", "status": "affected", "versionType": "git"}, {"version": "36bd28c1cb0dbf48645cfe43159907fb3253b33a", "lessThan": "4c1b25d85f4c9a0f85f3f8c39988ad266a3f3095", "status": "affected", "versionType": "git"}, {"version": "36bd28c1cb0dbf48645cfe43159907fb3253b33a", "lessThan": "05f789fa90d95d5771230e78453cedff2486039d", "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_port_wwan.c"], "versions": [{"version": "6.4", "status": "affected"}, {"version": "0", "lessThan": "6.4", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "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": "6.4", "versionEndExcluding": "6.6.145"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.12.97"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.18.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/7edd4db82f9429591de10be4c904c817f12ba029"}, {"url": "https://git.kernel.org/stable/c/112490467586146d323cb7230b1d72137e36900c"}, {"url": "https://git.kernel.org/stable/c/f7aebaee2961bfcb86f282202d3dbd9b69db1a7c"}, {"url": "https://git.kernel.org/stable/c/4c1b25d85f4c9a0f85f3f8c39988ad266a3f3095"}, {"url": "https://git.kernel.org/stable/c/05f789fa90d95d5771230e78453cedff2486039d"}], "title": "net: wwan: t7xx: check skb_clone in control TX", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/net/wwan/t7xx/t7xx_port_wwan.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "7edd4db82f9429591de10be4c904c817f12ba029", "status": "affected", "version": "36bd28c1cb0dbf48645cfe43159907fb3253b33a", "versionType": "git"}, {"lessThan": "112490467586146d323cb7230b1d72137e36900c", "status": "affected", "version": "36bd28c1cb0dbf48645cfe43159907fb3253b33a", "versionType": "git"}, {"lessThan": "f7aebaee2961bfcb86f282202d3dbd9b69db1a7c", "status": "affected", "version": "36bd28c1cb0dbf48645cfe43159907fb3253b33a", "versionType": "git"}, {"lessThan": "4c1b25d85f4c9a0f85f3f8c39988ad266a3f3095", "status": "affected", "version": "36bd28c1cb0dbf48645cfe43159907fb3253b33a", "versionType": "git"}, {"lessThan": "05f789fa90d95d5771230e78453cedff2486039d", "status": "affected", "version": "36bd28c1cb0dbf48645cfe43159907fb3253b33a", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/net/wwan/t7xx/t7xx_port_wwan.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.4"}, {"lessThan": "6.4", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.145", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.97", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.40", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "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\nnet: wwan: t7xx: check skb_clone in control TX\n\nt7xx_port_ctrl_tx() clones each skb fragment before passing it to the\nport transmit path. The clone is used immediately to set cloned->len, so\nan skb_clone() failure results in a NULL pointer dereference.\n\nCheck the clone before using it. If previous fragments were already\nqueued, preserve the driver's existing partial-write behavior by\nreturning the number of bytes submitted so far."}], "id": "CVE-2026-74263", "lastModified": "2026-08-17T06:19:19.870", "metrics": {}, "published": "2026-08-15T06:22:25.570", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/05f789fa90d95d5771230e78453cedff2486039d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/112490467586146d323cb7230b1d72137e36900c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4c1b25d85f4c9a0f85f3f8c39988ad266a3f3095"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7edd4db82f9429591de10be4c904c817f12ba029"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f7aebaee2961bfcb86f282202d3dbd9b69db1a7c"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: net: wwan: t7xx: check skb_clone in control TX", "id": "2516762", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516762"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet: wwan: t7xx: check skb_clone in control TX\nt7xx_port_ctrl_tx() clones each skb fragment before passing it to the\nport transmit path. The clone is used immediately to set cloned->len, so\nan skb_clone() failure results in a NULL pointer dereference.\nCheck the clone before using it. If previous fragments were already\nqueued, preserve the driver's existing partial-write behavior by\nreturning the number of bytes submitted so far.", "A flaw was found in the Linux kernel's Wireless Wide Area Network (WWAN) t7xx driver. The `t7xx_port_ctrl_tx()` function, which handles control transmissions, fails to validate the return value of `skb_clone()`. An attacker with local access could exploit this by triggering a scenario where `skb_clone()` returns a NULL pointer, leading to a NULL pointer dereference. This vulnerability can cause a system crash, resulting in a Denial of Service (DoS)."], "name": "CVE-2026-74263", "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": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-74263\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-74263\nhttps://lore.kernel.org/linux-cve-announce/2026081542-CVE-2026-74263-6a02@gregkh/T"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[36bd28c1cb0dbf48645cfe43159907fb3253b33a,7edd4db82f9429591de10be4c904c817f12ba029)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[36bd28c1cb0dbf48645cfe43159907fb3253b33a,112490467586146d323cb7230b1d72137e36900c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[36bd28c1cb0dbf48645cfe43159907fb3253b33a,f7aebaee2961bfcb86f282202d3dbd9b69db1a7c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[36bd28c1cb0dbf48645cfe43159907fb3253b33a,4c1b25d85f4c9a0f85f3f8c39988ad266a3f3095)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[36bd28c1cb0dbf48645cfe43159907fb3253b33a,05f789fa90d95d5771230e78453cedff2486039d)"}}], "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": "6.4"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.4)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.145,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.97,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.40,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc1,*]"}}], "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": "2026-08-15T12:00:05.302286+00:00", "updated": "2026-08-22T02:30:17.191362+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}