CVE-2024-44985

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A remote attacker on the internet reaches it with unsolicited TCP segments.\nAC:L - The attacker drives the vulnerable path at unbounded rate with a packet flood, and that same flood produces the GFP_ATOMIC memory pressure that makes skb_expand_head() fail, plus the CPU/scheduling pressure that widens the preemption window in the preemptible backlog-drain context; none of the required conditions lie outside attacker influence.\nPR:N - Generating a TCP RST/ACK reply to a closed or TIME_WAIT IPv6 port requires no credentials, no session, and no prior handshake \u2014 the code path is entirely pre-authentication.\nUI:N - The kernel emits the reply automatically on packet receipt; no local user or administrator action is involved.\nS:U - The freed struct inet6_dev and the resulting corruption are entirely within the kernel's own security authority, with no crossing of a VM, IOMMU, or sandbox boundary.\nC:H - The stale idev deref reads a __percpu pointer out of a freed slab object; controlling that object via heap reclaim converts the subsequent per-CPU MIB access into an attacker-directed kernel read, exposing arbitrary kernel memory.\nI:H - SNMP_INC_STATS64 performs a read-modify-write (u64_stats seqcount update plus counter add) at an address derived from the freed object's contents, yielding a controlled-address kernel write suitable for control-flow hijack once the inet6_dev allocation is groomed.\nA:H - Even unweaponized, dereferencing and incrementing through a freed inet6_dev's percpu pointer corrupts kernel memory and reliably produces an oops or panic, and the path can be re-triggered remotely at will."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ipv6/ip6_output.c"], "versions": [{"version": "81d626b00bdba16504eeae9cc891b18e83a9471a", "lessThan": "b3a3d5333c13a1be57499581eab4a8fc94d57f36", "status": "affected", "versionType": "git"}, {"version": "ee6b1db17f8287b615448488fc37f42bcfe9ece6", "lessThan": "c47e022011719fc5727bca661d662303180535ba", "status": "affected", "versionType": "git"}, {"version": "0c9f227bee11910a49e1d159abe102d06e3745d5", "lessThan": "975f764e96f71616b530e300c1bb2ac0ce0c2596", "status": "affected", "versionType": "git"}, {"version": "0c9f227bee11910a49e1d159abe102d06e3745d5", "lessThan": "38a21c026ed2cc7232414cb166efc1923f34af17", "status": "affected", "versionType": "git"}, {"version": "0c9f227bee11910a49e1d159abe102d06e3745d5", "lessThan": "124b428fe28064c809e4237b0b38e97200a8a4a8", "status": "affected", "versionType": "git"}, {"version": "0c9f227bee11910a49e1d159abe102d06e3745d5", "lessThan": "fc88d6c1f2895a5775795d82ec581afdff7661d1", "status": "affected", "versionType": "git"}, {"version": "0c9f227bee11910a49e1d159abe102d06e3745d5", "lessThan": "2d5ff7e339d04622d8282661df36151906d0e1c7", "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/ipv6/ip6_output.c"], "versions": [{"version": "5.15", "status": "affected"}, {"version": "0", "lessThan": "5.15", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.166", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.107", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.48", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.10.7", "lessThanOrEqual": "6.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.11", "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": "5.15", "versionEndExcluding": "5.15.166"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.1.107"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.6.48"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.10.7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.11"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/b3a3d5333c13a1be57499581eab4a8fc94d57f36"}, {"url": "https://git.kernel.org/stable/c/c47e022011719fc5727bca661d662303180535ba"}, {"url": "https://git.kernel.org/stable/c/975f764e96f71616b530e300c1bb2ac0ce0c2596"}, {"url": "https://git.kernel.org/stable/c/38a21c026ed2cc7232414cb166efc1923f34af17"}, {"url": "https://git.kernel.org/stable/c/124b428fe28064c809e4237b0b38e97200a8a4a8"}, {"url": "https://git.kernel.org/stable/c/fc88d6c1f2895a5775795d82ec581afdff7661d1"}, {"url": "https://git.kernel.org/stable/c/2d5ff7e339d04622d8282661df36151906d0e1c7"}], "title": "ipv6: prevent possible UAF in ip6_xmit()", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2024-09-10T01:05:42.699758Z", "id": "CVE-2024-44985", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-10T01:07:00.575Z"}}, {"title": "CVE Program Container", "references": [{"url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T22:14:33.082Z"}}]}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/ipv6/ip6_output.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "b3a3d5333c13a1be57499581eab4a8fc94d57f36", "status": "affected", "version": "81d626b00bdba16504eeae9cc891b18e83a9471a", "versionType": "git"}, {"lessThan": "c47e022011719fc5727bca661d662303180535ba", "status": "affected", "version": "ee6b1db17f8287b615448488fc37f42bcfe9ece6", "versionType": "git"}, {"lessThan": "975f764e96f71616b530e300c1bb2ac0ce0c2596", "status": "affected", "version": "0c9f227bee11910a49e1d159abe102d06e3745d5", "versionType": "git"}, {"lessThan": "38a21c026ed2cc7232414cb166efc1923f34af17", "status": "affected", "version": "0c9f227bee11910a49e1d159abe102d06e3745d5", "versionType": "git"}, {"lessThan": "124b428fe28064c809e4237b0b38e97200a8a4a8", "status": "affected", "version": "0c9f227bee11910a49e1d159abe102d06e3745d5", "versionType": "git"}, {"lessThan": "fc88d6c1f2895a5775795d82ec581afdff7661d1", "status": "affected", "version": "0c9f227bee11910a49e1d159abe102d06e3745d5", "versionType": "git"}, {"lessThan": "2d5ff7e339d04622d8282661df36151906d0e1c7", "status": "affected", "version": "0c9f227bee11910a49e1d159abe102d06e3745d5", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/ipv6/ip6_output.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.15"}, {"lessThan": "5.15", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.166", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.107", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.48", "versionType": "semver"}, {"lessThanOrEqual": "6.10.*", "status": "unaffected", "version": "6.10.7", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.11", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "1E86C365-0589-4961-B85C-B76395A12CC0", "versionEndExcluding": "5.15.166", "versionStartIncluding": "5.15", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "53954FF8-CB48-4302-BC4C-9DA7A88F44A2", "versionEndExcluding": "6.1.107", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "9DE9201A-CE6B-4726-BABB-8265EA0F8AE4", "versionEndExcluding": "6.6.48", "versionStartIncluding": "6.2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "D2AFDFD1-D95A-4EB7-843B-5E7659518B67", "versionEndExcluding": "6.10.7", "versionStartIncluding": "6.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.11:rc1:*:*:*:*:*:*", "matchCriteriaId": "8B3CE743-2126-47A3-8B7C-822B502CF119", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.11:rc2:*:*:*:*:*:*", "matchCriteriaId": "4DEB27E7-30AA-45CC-8934-B89263EF3551", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.11:rc3:*:*:*:*:*:*", "matchCriteriaId": "E0005AEF-856E-47EB-BFE4-90C46899394D", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.11:rc4:*:*:*:*:*:*", "matchCriteriaId": "39889A68-6D34-47A6-82FC-CD0BF23D6754", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: prevent possible UAF in ip6_xmit()\n\nIf skb_expand_head() returns NULL, skb has been freed\nand the associated dst/idev could also have been freed.\n\nWe must use rcu_read_lock() to prevent a possible UAF."}, {"lang": "es", "value": "En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: ipv6: evitar posible UAF en ip6_xmit() Si skb_expand_head() devuelve NULL, skb se ha liberado y el dst/idev asociado tambi\u00e9n podr\u00eda haberse liberado. Debemos utilizar rcu_read_lock() para evitar un posible UAF."}], "id": "CVE-2024-44985", "lastModified": "2026-08-04T11:20:06.457", "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": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-44985", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-09-10T01:05:42.699758Z", "version": "2.0.3"}}]}, "published": "2024-09-04T20:15:07.777", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/124b428fe28064c809e4237b0b38e97200a8a4a8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2d5ff7e339d04622d8282661df36151906d0e1c7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/38a21c026ed2cc7232414cb166efc1923f34af17"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/975f764e96f71616b530e300c1bb2ac0ce0c2596"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b3a3d5333c13a1be57499581eab4a8fc94d57f36"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c47e022011719fc5727bca661d662303180535ba"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/fc88d6c1f2895a5775795d82ec581afdff7661d1"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: ipv6: prevent possible UAF in ip6_xmit()", "id": "2309848", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2309848"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.6", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H", "status": "draft"}, "cwe": "CWE-416", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nipv6: prevent possible UAF in ip6_xmit()\nIf skb_expand_head() returns NULL, skb has been freed\nand the associated dst/idev could also have been freed.\nWe must use rcu_read_lock() to prevent a possible UAF."], "name": "CVE-2024-44985", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "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": "Will not fix", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Will not fix", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-09-04T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-44985\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-44985\nhttps://lore.kernel.org/linux-cve-announce/2024090445-CVE-2024-44985-2dde@gregkh/T"], "threat_severity": "Moderate"}

{}