266 lines
13 KiB
JSON
266 lines
13 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2024-44985",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2024-08-21T05:34:56.670Z",
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"datePublished": "2024-09-04T19:54:34.188Z",
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"dateUpdated": "2026-08-05T11:37:27.693Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T11:37:27.693Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"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."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 9.8,
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"baseSeverity": "CRITICAL"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:N - The only ip6_xmit() caller lacking a surrounding rcu_read_lock() while holding a refcounted skb dst is tcp_v6_send_response(), driven purely by inbound TCP/IPv6 packets (RST to closed ports via tcp_v6_rcv()'s no_tcp_socket path, TIME_WAIT ACKs, request-sock ACKs). 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 — 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."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/ipv6/ip6_output.c"
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],
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"versions": [
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{
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"version": "81d626b00bdba16504eeae9cc891b18e83a9471a",
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"lessThan": "b3a3d5333c13a1be57499581eab4a8fc94d57f36",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "ee6b1db17f8287b615448488fc37f42bcfe9ece6",
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"lessThan": "c47e022011719fc5727bca661d662303180535ba",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "0c9f227bee11910a49e1d159abe102d06e3745d5",
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"lessThan": "975f764e96f71616b530e300c1bb2ac0ce0c2596",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "0c9f227bee11910a49e1d159abe102d06e3745d5",
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"lessThan": "38a21c026ed2cc7232414cb166efc1923f34af17",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "0c9f227bee11910a49e1d159abe102d06e3745d5",
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"lessThan": "124b428fe28064c809e4237b0b38e97200a8a4a8",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "0c9f227bee11910a49e1d159abe102d06e3745d5",
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"lessThan": "fc88d6c1f2895a5775795d82ec581afdff7661d1",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "0c9f227bee11910a49e1d159abe102d06e3745d5",
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"lessThan": "2d5ff7e339d04622d8282661df36151906d0e1c7",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/ipv6/ip6_output.c"
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],
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"versions": [
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{
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"version": "5.15",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "5.15",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.166",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.107",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.48",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.10.7",
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"lessThanOrEqual": "6.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.11",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.15",
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"versionEndExcluding": "5.15.166"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.15",
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"versionEndExcluding": "6.1.107"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.15",
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"versionEndExcluding": "6.6.48"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.15",
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"versionEndExcluding": "6.10.7"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.15",
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"versionEndExcluding": "6.11"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/b3a3d5333c13a1be57499581eab4a8fc94d57f36"
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},
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{
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"url": "https://git.kernel.org/stable/c/c47e022011719fc5727bca661d662303180535ba"
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},
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{
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"url": "https://git.kernel.org/stable/c/975f764e96f71616b530e300c1bb2ac0ce0c2596"
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},
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{
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"url": "https://git.kernel.org/stable/c/38a21c026ed2cc7232414cb166efc1923f34af17"
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},
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{
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"url": "https://git.kernel.org/stable/c/124b428fe28064c809e4237b0b38e97200a8a4a8"
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},
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{
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"url": "https://git.kernel.org/stable/c/fc88d6c1f2895a5775795d82ec581afdff7661d1"
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},
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{
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"url": "https://git.kernel.org/stable/c/2d5ff7e339d04622d8282661df36151906d0e1c7"
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}
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],
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"title": "ipv6: prevent possible UAF in ip6_xmit()",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2024-09-10T01:05:42.699758Z",
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"id": "CVE-2024-44985",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2024-09-10T01:07:00.575Z"
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}
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},
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{
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"title": "CVE Program Container",
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"references": [
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{
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"url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
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}
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],
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"providerMetadata": {
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"orgId": "af854a3a-2127-422b-91ae-364da2661108",
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"shortName": "CVE",
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"dateUpdated": "2025-11-03T22:14:33.082Z"
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}
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}
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]
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}
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} |