CVE-2026-98711

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98711", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.365Z", "datePublished": "2026-10-18T15:46:44.001Z", "dateUpdated": "2026-10-30T12:39:02.373Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:39:02.373Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: cw1200: fix TX padding OOB read leaking heap data to device\n\nThe TX path rounds the transfer size up to the bus alignment\n(align_size(), up to 511 bytes for SDIO, 1 byte for SPI) but sends\nthe padded length straight from the frame buffer, which has no room\nreserved for the padding. cw1200_data_write() therefore reads past\nthe end of the frame and the bus transfer carries those bytes to the\ndevice. A bogus device can collect up to 511 bytes of kernel heap\ndata per TX frame.\n\nThe RX path does not have this problem: it allocates the skb with\nthe aligned length (alloc_len) before reading.\n\nCompute the exact padding with the bus align_size() callback, make\nsure queued TX frames have tailroom for it, and zero the padding\nbytes before the transfer so nothing past the frame is exposed.\n\nThis is not expected to change driver behavior on most cases: frame\ncontents and transfer sizes are unchanged, only the content of the\npadding bytes (previously undefined stale memory, now zero), which\nthe device never reads since the WSM header carries the real frame\nlength. The skb expansion can only fail under memory exhaustion,\nin which case the frame is dropped like on the existing error paths\nof cw1200_tx().\n\nDiscovered by Atuin - Automated Vulnerability Discovery Engine."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/wireless/st/cw1200/bh.c", "drivers/net/wireless/st/cw1200/txrx.c"], "versions": [{"version": "a910e4a94f6923c8c988565525f017f687bf7205", "lessThan": "8e8e4d0b15f174d964a48b1c54dc8828e5ae87c5", "status": "affected", "versionType": "git"}, {"version": "a910e4a94f6923c8c988565525f017f687bf7205", "lessThan": "a7eae7547ae1443bfbca2cb90d3ef5e501d6445c", "status": "affected", "versionType": "git"}, {"version": "a910e4a94f6923c8c988565525f017f687bf7205", "lessThan": "5897945635aa5413595bf696127493be96c08e2d", "status": "affected", "versionType": "git"}, {"version": "a910e4a94f6923c8c988565525f017f687bf7205", "lessThan": "b66539a4dab128fafaad736b53ce15c19d14d561", "status": "affected", "versionType": "git"}, {"version": "a910e4a94f6923c8c988565525f017f687bf7205", "lessThan": "71f693a0ecccf36532dd2790f7969da6c71d5d23", "status": "affected", "versionType": "git"}, {"version": "a910e4a94f6923c8c988565525f017f687bf7205", "lessThan": "b0e97bd40e0c2cb1a3530ef8f6250aacf3224515", "status": "affected", "versionType": "git"}, {"version": "a910e4a94f6923c8c988565525f017f687bf7205", "lessThan": "678c8f4ba285649d5418a858d5d4f30c728a54ad", "status": "affected", "versionType": "git"}, {"version": "a910e4a94f6923c8c988565525f017f687bf7205", "lessThan": "7c1611780823b76219cb1478db53dfd890c4a9a2", "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/wireless/st/cw1200/bh.c", "drivers/net/wireless/st/cw1200/txrx.c"], "versions": [{"version": "3.11", "status": "affected"}, {"version": "0", "lessThan": "3.11", "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": "6.18.56", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.10", "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": "3.11", "versionEndExcluding": "5.10.273"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.11", "versionEndExcluding": "5.15.224"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.11", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.11", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.11", "versionEndExcluding": "6.12.113"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.11", "versionEndExcluding": "6.18.56"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.11", "versionEndExcluding": "7.2.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.11", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/8e8e4d0b15f174d964a48b1c54dc8828e5ae87c5"}, {"url": "https://git.kernel.org/stable/c/a7eae7547ae1443bfbca2cb90d3ef5e501d6445c"}, {"url": "https://git.kernel.org/stable/c/5897945635aa5413595bf696127493be96c08e2d"}, {"url": "https://git.kernel.org/stable/c/b66539a4dab128fafaad736b53ce15c19d14d561"}, {"url": "https://git.kernel.org/stable/c/71f693a0ecccf36532dd2790f7969da6c71d5d23"}, {"url": "https://git.kernel.org/stable/c/b0e97bd40e0c2cb1a3530ef8f6250aacf3224515"}, {"url": "https://git.kernel.org/stable/c/678c8f4ba285649d5418a858d5d4f30c728a54ad"}, {"url": "https://git.kernel.org/stable/c/7c1611780823b76219cb1478db53dfd890c4a9a2"}], "title": "wifi: cw1200: fix TX padding OOB read leaking heap data to device", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/net/wireless/st/cw1200/bh.c", "drivers/net/wireless/st/cw1200/txrx.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "8e8e4d0b15f174d964a48b1c54dc8828e5ae87c5", "status": "affected", "version": "a910e4a94f6923c8c988565525f017f687bf7205", "versionType": "git"}, {"lessThan": "a7eae7547ae1443bfbca2cb90d3ef5e501d6445c", "status": "affected", "version": "a910e4a94f6923c8c988565525f017f687bf7205", "versionType": "git"}, {"lessThan": "5897945635aa5413595bf696127493be96c08e2d", "status": "affected", "version": "a910e4a94f6923c8c988565525f017f687bf7205", "versionType": "git"}, {"lessThan": "b66539a4dab128fafaad736b53ce15c19d14d561", "status": "affected", "version": "a910e4a94f6923c8c988565525f017f687bf7205", "versionType": "git"}, {"lessThan": "71f693a0ecccf36532dd2790f7969da6c71d5d23", "status": "affected", "version": "a910e4a94f6923c8c988565525f017f687bf7205", "versionType": "git"}, {"lessThan": "b0e97bd40e0c2cb1a3530ef8f6250aacf3224515", "status": "affected", "version": "a910e4a94f6923c8c988565525f017f687bf7205", "versionType": "git"}, {"lessThan": "678c8f4ba285649d5418a858d5d4f30c728a54ad", "status": "affected", "version": "a910e4a94f6923c8c988565525f017f687bf7205", "versionType": "git"}, {"lessThan": "7c1611780823b76219cb1478db53dfd890c4a9a2", "status": "affected", "version": "a910e4a94f6923c8c988565525f017f687bf7205", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/net/wireless/st/cw1200/bh.c", "drivers/net/wireless/st/cw1200/txrx.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "3.11"}, {"lessThan": "3.11", "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": "6.18.56", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.10", "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\nwifi: cw1200: fix TX padding OOB read leaking heap data to device\n\nThe TX path rounds the transfer size up to the bus alignment\n(align_size(), up to 511 bytes for SDIO, 1 byte for SPI) but sends\nthe padded length straight from the frame buffer, which has no room\nreserved for the padding. cw1200_data_write() therefore reads past\nthe end of the frame and the bus transfer carries those bytes to the\ndevice. A bogus device can collect up to 511 bytes of kernel heap\ndata per TX frame.\n\nThe RX path does not have this problem: it allocates the skb with\nthe aligned length (alloc_len) before reading.\n\nCompute the exact padding with the bus align_size() callback, make\nsure queued TX frames have tailroom for it, and zero the padding\nbytes before the transfer so nothing past the frame is exposed.\n\nThis is not expected to change driver behavior on most cases: frame\ncontents and transfer sizes are unchanged, only the content of the\npadding bytes (previously undefined stale memory, now zero), which\nthe device never reads since the WSM header carries the real frame\nlength. The skb expansion can only fail under memory exhaustion,\nin which case the frame is dropped like on the existing error paths\nof cw1200_tx().\n\nDiscovered by Atuin - Automated Vulnerability Discovery Engine."}], "id": "CVE-2026-98711", "lastModified": "2026-10-30T13:21:20.680", "metrics": {}, "published": "2026-10-18T16:17:24.653", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5897945635aa5413595bf696127493be96c08e2d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/678c8f4ba285649d5418a858d5d4f30c728a54ad"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/71f693a0ecccf36532dd2790f7969da6c71d5d23"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7c1611780823b76219cb1478db53dfd890c4a9a2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8e8e4d0b15f174d964a48b1c54dc8828e5ae87c5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a7eae7547ae1443bfbca2cb90d3ef5e501d6445c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b0e97bd40e0c2cb1a3530ef8f6250aacf3224515"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b66539a4dab128fafaad736b53ce15c19d14d561"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: kernel: cw1200: Information disclosure via out-of-bounds read during frame transmission", "id": "2555085", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2555085"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.6", "cvss3_scoring_vector": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "status": "draft"}, "cwe": "CWE-200", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nwifi: cw1200: fix TX padding OOB read leaking heap data to device\nThe TX path rounds the transfer size up to the bus alignment\n(align_size(), up to 511 bytes for SDIO, 1 byte for SPI) but sends\nthe padded length straight from the frame buffer, which has no room\nreserved for the padding. cw1200_data_write() therefore reads past\nthe end of the frame and the bus transfer carries those bytes to the\ndevice. A bogus device can collect up to 511 bytes of kernel heap\ndata per TX frame.\nThe RX path does not have this problem: it allocates the skb with\nthe aligned length (alloc_len) before reading.\nCompute the exact padding with the bus align_size() callback, make\nsure queued TX frames have tailroom for it, and zero the padding\nbytes before the transfer so nothing past the frame is exposed.\nThis is not expected to change driver behavior on most cases: frame\ncontents and transfer sizes are unchanged, only the content of the\npadding bytes (previously undefined stale memory, now zero), which\nthe device never reads since the WSM header carries the real frame\nlength. The skb expansion can only fail under memory exhaustion,\nin which case the frame is dropped like on the existing error paths\nof cw1200_tx().\nDiscovered by Atuin - Automated Vulnerability Discovery Engine.", "A flaw was found in the Linux kernel's cw1200 wireless network driver. During data transmission, the driver pads transfer sizes to meet hardware alignment requirements without reserving sufficient space in the frame buffer. This causes the driver to read beyond the buffer boundaries and transmit adjacent kernel memory across the bus. Consequently, a rogue or compromised hardware device can capture sensitive kernel heap data, leading to information disclosure."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2026-98711", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}], "public_date": "2026-10-18T15:46:44Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98711\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98711\nhttps://git.kernel.org/stable/c/678c8f4ba285649d5418a858d5d4f30c728a54ad\nhttps://git.kernel.org/stable/c/71f693a0ecccf36532dd2790f7969da6c71d5d23\nhttps://git.kernel.org/stable/c/7c1611780823b76219cb1478db53dfd890c4a9a2\nhttps://git.kernel.org/stable/c/b0e97bd40e0c2cb1a3530ef8f6250aacf3224515"], "statement": "The cw1200 TX path can read beyond the end of a frame buffer because the bus transfer length is rounded up for alignment without reserving matching skb tailroom. On SDIO systems this can expose up to 511 bytes of stale kernel heap data per transmitted frame to a malicious or compromised wireless device. Repeated transmissions may allow the device to collect a substantial amount of kernel memory, although the attacker cannot directly select which heap bytes appear in the padding. For the CVSS the PR:N value is used because no authenticated host privilege is required after the attacker controls the attached device. The attack vector is AV:P because the leaked padding is delivered to the directly attached SDIO or SPI device and is not transmitted to a remote WiFi peer. Impact is an information disclosure with no supported write primitive, kernel crash, or privilege escalation path.", "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[a910e4a94f6923c8c988565525f017f687bf7205,71f693a0ecccf36532dd2790f7969da6c71d5d23)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[a910e4a94f6923c8c988565525f017f687bf7205,b0e97bd40e0c2cb1a3530ef8f6250aacf3224515)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[a910e4a94f6923c8c988565525f017f687bf7205,678c8f4ba285649d5418a858d5d4f30c728a54ad)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[a910e4a94f6923c8c988565525f017f687bf7205,7c1611780823b76219cb1478db53dfd890c4a9a2)"}}], "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": "generic", "value": "3.11"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,3.11)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.113,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.56,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.10,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3,*]"}}], "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": "2026-10-18T19:30:14.462561+00:00", "updated": "2026-10-22T20:45:05.391461+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}