{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-43043", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-01T14:12:55.979Z", "datePublished": "2026-05-01T14:15:39.576Z", "dateUpdated": "2026-05-01T14:15:39.576Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-01T14:15:39.576Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: af-alg - fix NULL pointer dereference in scatterwalk\n\nThe AF_ALG interface fails to unmark the end of a Scatter/Gather List (SGL)\nwhen chaining a new af_alg_tsgl structure. If a sendmsg() fills an SGL\nexactly to MAX_SGL_ENTS, the last entry is marked as the end. A subsequent\nsendmsg() allocates a new SGL and chains it, but fails to clear the end\nmarker on the previous SGL's last data entry.\n\nThis causes the crypto scatterwalk to hit a premature end, returning NULL\non sg_next() and leading to a kernel panic during dereference.\n\nFix this by explicitly unmarking the end of the previous SGL when\nperforming sg_chain() in af_alg_alloc_tsgl()."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["crypto/af_alg.c"], "versions": [{"version": "8ff590903d5fc7f5a0a988c38267a3d08e6393a2", "lessThan": "f48d3dd99199180cf37d6253550c55e86372309a", "status": "affected", "versionType": "git"}, {"version": "8ff590903d5fc7f5a0a988c38267a3d08e6393a2", "lessThan": "f9acceae7b004956851fd4268edf9f518a9bce04", "status": "affected", "versionType": "git"}, {"version": "8ff590903d5fc7f5a0a988c38267a3d08e6393a2", "lessThan": "7195350fb78538c25cd790d703f8f2c73ee0d395", "status": "affected", "versionType": "git"}, {"version": "8ff590903d5fc7f5a0a988c38267a3d08e6393a2", "lessThan": "7cdf2c6381b21ab5ccf8116750d5582fcd6c0f49", "status": "affected", "versionType": "git"}, {"version": "8ff590903d5fc7f5a0a988c38267a3d08e6393a2", "lessThan": "44eafa39363e8d5dfda6a8c6eb6b45458ed4b948", "status": "affected", "versionType": "git"}, {"version": "8ff590903d5fc7f5a0a988c38267a3d08e6393a2", "lessThan": "00cbdec17c15d024a1c5002c7365df7624a18a75", "status": "affected", "versionType": "git"}, {"version": "8ff590903d5fc7f5a0a988c38267a3d08e6393a2", "lessThan": "4b03ab0a587ec57eb7ddb5c115d84a42896f60f7", "status": "affected", "versionType": "git"}, {"version": "8ff590903d5fc7f5a0a988c38267a3d08e6393a2", "lessThan": "62397b493e14107ae82d8b80938f293d95425bcb", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["crypto/af_alg.c"], "versions": [{"version": "2.6.38", "status": "affected"}, {"version": "0", "lessThan": "2.6.38", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.253", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.203", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.168", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.134", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.81", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.22", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.12", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "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": "2.6.38", "versionEndExcluding": "5.10.253"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.38", "versionEndExcluding": "5.15.203"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.38", "versionEndExcluding": "6.1.168"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.38", "versionEndExcluding": "6.6.134"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.38", "versionEndExcluding": "6.12.81"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.38", "versionEndExcluding": "6.18.22"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.38", "versionEndExcluding": "6.19.12"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.38", "versionEndExcluding": "7.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/f48d3dd99199180cf37d6253550c55e86372309a"}, {"url": "https://git.kernel.org/stable/c/f9acceae7b004956851fd4268edf9f518a9bce04"}, {"url": "https://git.kernel.org/stable/c/7195350fb78538c25cd790d703f8f2c73ee0d395"}, {"url": "https://git.kernel.org/stable/c/7cdf2c6381b21ab5ccf8116750d5582fcd6c0f49"}, {"url": "https://git.kernel.org/stable/c/44eafa39363e8d5dfda6a8c6eb6b45458ed4b948"}, {"url": "https://git.kernel.org/stable/c/00cbdec17c15d024a1c5002c7365df7624a18a75"}, {"url": "https://git.kernel.org/stable/c/4b03ab0a587ec57eb7ddb5c115d84a42896f60f7"}, {"url": "https://git.kernel.org/stable/c/62397b493e14107ae82d8b80938f293d95425bcb"}], "title": "crypto: af-alg - fix NULL pointer dereference in scatterwalk", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: af-alg - fix NULL pointer dereference in scatterwalk\n\nThe AF_ALG interface fails to unmark the end of a Scatter/Gather List (SGL)\nwhen chaining a new af_alg_tsgl structure. If a sendmsg() fills an SGL\nexactly to MAX_SGL_ENTS, the last entry is marked as the end. A subsequent\nsendmsg() allocates a new SGL and chains it, but fails to clear the end\nmarker on the previous SGL's last data entry.\n\nThis causes the crypto scatterwalk to hit a premature end, returning NULL\non sg_next() and leading to a kernel panic during dereference.\n\nFix this by explicitly unmarking the end of the previous SGL when\nperforming sg_chain() in af_alg_alloc_tsgl()."}], "id": "CVE-2026-43043", "lastModified": "2026-05-01T15:24:14.893", "metrics": {}, "published": "2026-05-01T15:16:50.563", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/00cbdec17c15d024a1c5002c7365df7624a18a75"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/44eafa39363e8d5dfda6a8c6eb6b45458ed4b948"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4b03ab0a587ec57eb7ddb5c115d84a42896f60f7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/62397b493e14107ae82d8b80938f293d95425bcb"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7195350fb78538c25cd790d703f8f2c73ee0d395"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7cdf2c6381b21ab5ccf8116750d5582fcd6c0f49"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f48d3dd99199180cf37d6253550c55e86372309a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f9acceae7b004956851fd4268edf9f518a9bce04"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: crypto: af-alg - fix NULL pointer dereference in scatterwalk", "id": "2464487", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2464487"}, "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": ["A flaw was found in the Linux kernel's af-alg subsystem. When the AF_ALG interface chains a new af_alg_tsgl structure, it fails to unmark the end of a Scatter/Gather List (SGL). This can lead to a NULL pointer dereference during a subsequent sendmsg() operation, causing a kernel panic and resulting in a Denial of Service (DoS)."], "name": "CVE-2026-43043", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-43043\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43043\nhttps://lore.kernel.org/linux-cve-announce/2026050104-CVE-2026-43043-6997@gregkh/T"], "statement": "This Moderate impact flaw in the Linux kernel's `af-alg` subsystem can lead to a Denial of Service. A local attacker could trigger a kernel panic by exploiting a NULL pointer dereference when the `AF_ALG` interface fails to correctly manage Scatter/Gather Lists, impacting system availability.", "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8ff590903d5fc7f5a0a988c38267a3d08e6393a2,f48d3dd99199180cf37d6253550c55e86372309a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8ff590903d5fc7f5a0a988c38267a3d08e6393a2,f9acceae7b004956851fd4268edf9f518a9bce04)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8ff590903d5fc7f5a0a988c38267a3d08e6393a2,7195350fb78538c25cd790d703f8f2c73ee0d395)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8ff590903d5fc7f5a0a988c38267a3d08e6393a2,7cdf2c6381b21ab5ccf8116750d5582fcd6c0f49)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8ff590903d5fc7f5a0a988c38267a3d08e6393a2,44eafa39363e8d5dfda6a8c6eb6b45458ed4b948)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8ff590903d5fc7f5a0a988c38267a3d08e6393a2,00cbdec17c15d024a1c5002c7365df7624a18a75)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8ff590903d5fc7f5a0a988c38267a3d08e6393a2,4b03ab0a587ec57eb7ddb5c115d84a42896f60f7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8ff590903d5fc7f5a0a988c38267a3d08e6393a2,62397b493e14107ae82d8b80938f293d95425bcb)"}}], "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": "2.6.38"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,2.6.38)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.253,5.11.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.203,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.168,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.134,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.81,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.22,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.19.12,6.20.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.0,*]"}}], "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": "2026-05-01T19:00:08.007743+00:00", "updated": "2026-05-02T07:15:16.277207+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-476"]}