CVE-2024-26582

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Per kernel scoring guidance, kTLS bugs triggered by remote peer data are Network.\nAC:L - There is no race to win \u2014 the async completion callback frees the pages before process_rx_list() reads them, deterministically. The required preconditions are the default on mainstream deployments (TLS 1.2 + generic-gcm-aesni, which the SIMD wrapper always registers with CRYPTO_ALG_ASYNC) and the remaining one, a partial read, is forced at will by the peer sending oversized records.\nPR:N - The attacker is the remote TLS peer, which holds no privileges or account on the target system \u2014 any client that completes an anonymous TLS handshake with a kTLS-offloading server (or any malicious server a kTLS client connects to) can drive the bug. No local credentials are involved anywhere on the path.\nUI:N - The only local behavior required is an application calling recvmsg() on its kTLS socket with a buffer smaller than the incoming record, which is ordinary, continuous operation of any TLS-consuming server or client. No victim performs any special action.\nS:U - The corruption is confined to kernel memory managed by the same security authority; there is no VM, IOMMU, or sandbox boundary crossed. This is a standard in-kernel memory-safety issue.\nC:H - process_rx_list() copies the contents of already-freed pages directly into the userspace receive buffer, and the partial-read nature leaves the stale skb on rx_list so the leak repeats on later recvmsg() calls with a wide reallocation window. Attacker-driven spraying can place other sockets' plaintext, page-cache data, or slab contents into those pages, yielding a repeatable kernel memory disclosure primitive.\nI:H - Beyond the read, skb_release_data() issues a second put_page() on pages that have since been reallocated, dropping a live page's refcount to zero and freeing memory owned by an unrelated allocation. This cross-owner page use-after-free is a well-established route to arbitrary write and control-flow hijack via reuse as slab or page-table memory.\nA:H - The page refcount underflow triggers bad_page()/VM_BUG_ON_PAGE and corrupts the buddy allocator, and reading or reusing freed pages oopses immediately under KASAN or page poisoning. A remote peer can trigger this repeatedly, reliably panicking the machine."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/tls/tls_sw.c"], "versions": [{"version": "fd31f3996af2627106e22a9f8072764fede51161", "lessThan": "20b4ed034872b4d024b26e2bc1092c3f80e5db96", "status": "affected", "versionType": "git"}, {"version": "fd31f3996af2627106e22a9f8072764fede51161", "lessThan": "d684763534b969cca1022e2a28645c7cc91f7fa5", "status": "affected", "versionType": "git"}, {"version": "fd31f3996af2627106e22a9f8072764fede51161", "lessThan": "754c9bab77a1b895b97bd99d754403c505bc79df", "status": "affected", "versionType": "git"}, {"version": "fd31f3996af2627106e22a9f8072764fede51161", "lessThan": "32b55c5ff9103b8508c1e04bfa5a08c64e7a925f", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/tls/tls_sw.c"], "versions": [{"version": "6.0", "status": "affected"}, {"version": "0", "lessThan": "6.0", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.79", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.18", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.7.6", "lessThanOrEqual": "6.7.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.8", "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": "6.0", "versionEndExcluding": "6.1.79"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.6.18"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.7.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.8"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/20b4ed034872b4d024b26e2bc1092c3f80e5db96"}, {"url": "https://git.kernel.org/stable/c/d684763534b969cca1022e2a28645c7cc91f7fa5"}, {"url": "https://git.kernel.org/stable/c/754c9bab77a1b895b97bd99d754403c505bc79df"}, {"url": "https://git.kernel.org/stable/c/32b55c5ff9103b8508c1e04bfa5a08c64e7a925f"}], "title": "net: tls: fix use-after-free with partial reads and async decrypt", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/20b4ed034872b4d024b26e2bc1092c3f80e5db96", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/d684763534b969cca1022e2a28645c7cc91f7fa5", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/754c9bab77a1b895b97bd99d754403c505bc79df", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/32b55c5ff9103b8508c1e04bfa5a08c64e7a925f", "tags": ["x_transferred"]}, {"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/EZOU3745CWCDZ7EMKMXB2OEEIB5Q3IWM/"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-04T18:29:45.171Z"}}, {"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2024-08-08T19:39:21.408800Z", "id": "CVE-2024-26582", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-08-08T19:39:35.386Z"}}]}}

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Per kernel scoring guidance, kTLS bugs triggered by remote peer data are Network.\nAC:L - There is no race to win \u2014 the async completion callback frees the pages before process_rx_list() reads them, deterministically. The required preconditions are the default on mainstream deployments (TLS 1.2 + generic-gcm-aesni, which the SIMD wrapper always registers with CRYPTO_ALG_ASYNC) and the remaining one, a partial read, is forced at will by the peer sending oversized records.\nPR:N - The attacker is the remote TLS peer, which holds no privileges or account on the target system \u2014 any client that completes an anonymous TLS handshake with a kTLS-offloading server (or any malicious server a kTLS client connects to) can drive the bug. 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Attacker-driven spraying can place other sockets' plaintext, page-cache data, or slab contents into those pages, yielding a repeatable kernel memory disclosure primitive.\nI:H - Beyond the read, skb_release_data() issues a second put_page() on pages that have since been reallocated, dropping a live page's refcount to zero and freeing memory owned by an unrelated allocation. This cross-owner page use-after-free is a well-established route to arbitrary write and control-flow hijack via reuse as slab or page-table memory.\nA:H - The page refcount underflow triggers bad_page()/VM_BUG_ON_PAGE and corrupts the buddy allocator, and reading or reusing freed pages oopses immediately under KASAN or page poisoning. A remote peer can trigger this repeatedly, reliably panicking the machine."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "fd31f3996af2627106e22a9f8072764fede51161", "lessThan": "20b4ed034872b4d024b26e2bc1092c3f80e5db96", "versionType": "git"}, {"status": "affected", "version": "fd31f3996af2627106e22a9f8072764fede51161", "lessThan": "d684763534b969cca1022e2a28645c7cc91f7fa5", "versionType": "git"}, {"status": "affected", "version": "fd31f3996af2627106e22a9f8072764fede51161", "lessThan": "754c9bab77a1b895b97bd99d754403c505bc79df", "versionType": "git"}, {"status": "affected", "version": "fd31f3996af2627106e22a9f8072764fede51161", "lessThan": "32b55c5ff9103b8508c1e04bfa5a08c64e7a925f", "versionType": "git"}], "programFiles": ["net/tls/tls_sw.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.0"}, {"status": "unaffected", "version": "0", "lessThan": "6.0", "versionType": "semver"}, {"status": "unaffected", "version": "6.1.79", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.18", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.7.6", "versionType": "semver", "lessThanOrEqual": "6.7.*"}, {"status": "unaffected", "version": "6.8", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["net/tls/tls_sw.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/20b4ed034872b4d024b26e2bc1092c3f80e5db96"}, {"url": "https://git.kernel.org/stable/c/d684763534b969cca1022e2a28645c7cc91f7fa5"}, {"url": "https://git.kernel.org/stable/c/754c9bab77a1b895b97bd99d754403c505bc79df"}, {"url": "https://git.kernel.org/stable/c/32b55c5ff9103b8508c1e04bfa5a08c64e7a925f"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: tls: fix use-after-free with partial reads and async decrypt\n\ntls_decrypt_sg doesn't take a reference on the pages from clear_skb,\nso the put_page() in tls_decrypt_done releases them, and we trigger\na use-after-free in process_rx_list when we try to read from the\npartially-read skb."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.79", "versionStartIncluding": "6.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.18", "versionStartIncluding": "6.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.7.6", "versionStartIncluding": "6.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.8", "versionStartIncluding": "6.0"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:26:01.134Z"}}}, "cveMetadata": {"cveId": "CVE-2024-26582", "state": "PUBLISHED", "dateUpdated": "2026-08-05T11:26:01.134Z", "dateReserved": "2024-02-19T14:20:24.125Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-02-21T14:59:11.229Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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lecturas parciales y descifrado as\u00edncrono tls_decrypt_sg no toma una referencia en las p\u00e1ginas de clear_skb, por lo que put_page() en tls_decrypt_done las libera y activamos un use-after-free en Process_rx_list cuando intentamos leer desde el skb parcialmente le\u00eddo."}], "id": "CVE-2024-26582", "lastModified": "2026-08-04T11:16:44.207", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": 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"416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/754c9bab77a1b895b97bd99d754403c505bc79df"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d684763534b969cca1022e2a28645c7cc91f7fa5"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/20b4ed034872b4d024b26e2bc1092c3f80e5db96"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/32b55c5ff9103b8508c1e04bfa5a08c64e7a925f"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/754c9bab77a1b895b97bd99d754403c505bc79df"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d684763534b969cca1022e2a28645c7cc91f7fa5"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/EZOU3745CWCDZ7EMKMXB2OEEIB5Q3IWM/"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2024:2394", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-427.13.1.el9_4", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-04-30T00:00:00Z"}, {"advisory": "RHSA-2024:2394", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-427.13.1.el9_4", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-04-30T00:00:00Z"}, {"advisory": "RHSA-2024:1881", "cpe": "cpe:/a:redhat:rhel_eus:9.2", "package": "kernel-0:5.14.0-284.62.1.el9_2", "product_name": "Red Hat Enterprise Linux 9.2 Extended Update Support", "release_date": "2024-04-18T00:00:00Z"}, {"advisory": "RHSA-2024:1882", "cpe": "cpe:/a:redhat:rhel_eus:9.2::nfv", "package": "kernel-rt-0:5.14.0-284.62.1.rt14.347.el9_2", "product_name": "Red Hat Enterprise Linux 9.2 Extended Update Support", "release_date": "2024-04-18T00:00:00Z"}], "bugzilla": {"description": "kernel: tls: use-after-free with partial reads and async decrypt", "id": "2265518", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2265518"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.8", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H", "status": "verified"}, "cwe": "CWE-416", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet: tls: fix use-after-free with partial reads and async decrypt\ntls_decrypt_sg doesn't take a reference on the pages from clear_skb,\nso the put_page() in tls_decrypt_done releases them, and we trigger\na use-after-free in process_rx_list when we try to read from the\npartially-read skb.", "A use-after-free vulnerability was found in the tls subsystem of the Linux kernel. The tls_decrypt_sg() function doesn't take references on the pages from clear_skb, so the put_page() in tls_decrypt_done() releases them and a use-after-free can be triggered in process_rx_list when trying to read from the partially-read skb. This issue could lead to a denial of service condition or code execution."], "mitigation": {"lang": "en:us", "value": "No current mitigation is available for this vulnerability. Please make sure to have kernel up-to-date as soon as the patches are available to make sure the flaw mitigated."}, "name": "CVE-2024-26582", "package_state": [{"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": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-02-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-26582\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-26582\nhttps://lore.kernel.org/linux-cve-announce/2024022139-spruce-prelude-c358@gregkh/T/#u"], "statement": "Red Hat Enterprise Linux 6 and 7 are not affected by this CVE as they did not include kernel TLS support (upstream commit 3c4d755). Red Hat Enterprise Linux 8 is not affected as it did not include the upstream commit that introduced this flaw (fd31f39 \"tls: rx: decrypt into a fresh skb\").", "threat_severity": "Moderate"}

{}