164 lines
8.4 KiB
JSON
164 lines
8.4 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-2026-98801",
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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": "2026-09-25T10:25:14.370Z",
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"datePublished": "2026-10-18T15:48:47.171Z",
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"dateUpdated": "2026-10-19T09:25:54.691Z"
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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": "2026-10-19T09:25:54.691Z"
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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\nnet: restrict SO_RESERVE_MEM to TCP sockets and cap max value\n\nCommit 2bb2f5fb21b0 (\"net: add new socket option SO_RESERVE_MEM\") and\ncommit d00c8ee31729 (\"net: fix possible NULL deref in sock_reserve_memory\")\nonly checked sk_has_account(sk), which is true for both TCP and UDP\nsockets.\n\nHowever, SO_RESERVE_MEM and sk_unused_reserved_mem() are currently only\nsupported by TCP:\n- On UDP sockets, sk->sk_forward_alloc is protected by\n sk->sk_receive_queue.lock, whereas sock_reserve_memory() and\n sock_release_reserved_memory() only acquire lock_sock(sk). Concurrent\n UDP packet reception/release and setsockopt(SO_RESERVE_MEM) corrupt\n sk_forward_alloc and memcg accounting.\n- udp_rmem_release() reclaims excess sk_forward_alloc without\n accounting for sk_unused_reserved_mem(sk).\n\nRestrict sock_reserve_memory() to TCP sockets (sk_is_tcp(sk)) for now.\nSupporting SO_RESERVE_MEM for UDP (acquiring sk_receive_queue.lock and\nhonoring sk_unused_reserved_mem() in udp_rmem_release()) can be done in\na future net-next series if needed.\n\nIn addition, reject val > SZ_1G with -EINVAL in\nsk_setsockopt(SO_RESERVE_MEM). Without an upper bound, values near\nINT_MAX cause sk_mem_pages(delta) and (pages << PAGE_SHIFT) to overflow\n32-bit signed int, corrupting sk->sk_forward_alloc and\nsk->sk_reserved_mem. Using a page-aligned cap (SZ_1G) ensures that the\npage-rounded sk->sk_reserved_mem reported by getsockopt(SO_RESERVE_MEM)\ncan always be passed back to setsockopt(SO_RESERVE_MEM)."
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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/core/sock.c"
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],
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"versions": [
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{
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"version": "2bb2f5fb21b0486ff69b7b4a1fe03a760527d133",
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"lessThan": "492e04f9a00f3cc88a1f6899417b10f3019a624e",
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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": "2bb2f5fb21b0486ff69b7b4a1fe03a760527d133",
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"lessThan": "5069ce898148bd799395c5a464e006cbb840f188",
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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": "2bb2f5fb21b0486ff69b7b4a1fe03a760527d133",
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"lessThan": "a467b05b201b5c26be52ed3081992fa9c0387648",
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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": "2bb2f5fb21b0486ff69b7b4a1fe03a760527d133",
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"lessThan": "37e02c42a00be692c06343e11779aadc45f45971",
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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/core/sock.c"
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],
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"versions": [
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{
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"version": "5.16",
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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": "5.16",
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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": "6.12.113",
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"lessThanOrEqual": "6.12.*",
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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": "6.18.56",
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"lessThanOrEqual": "6.18.*",
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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": "7.2.10",
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"lessThanOrEqual": "7.2.*",
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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": "7.3",
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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": "5.16",
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"versionEndExcluding": "6.12.113"
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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": "5.16",
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"versionEndExcluding": "6.18.56"
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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": "5.16",
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"versionEndExcluding": "7.2.10"
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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": "5.16",
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"versionEndExcluding": "7.3"
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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/492e04f9a00f3cc88a1f6899417b10f3019a624e"
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},
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{
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"url": "https://git.kernel.org/stable/c/5069ce898148bd799395c5a464e006cbb840f188"
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},
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{
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"url": "https://git.kernel.org/stable/c/a467b05b201b5c26be52ed3081992fa9c0387648"
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},
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{
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"url": "https://git.kernel.org/stable/c/37e02c42a00be692c06343e11779aadc45f45971"
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}
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],
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"title": "net: restrict SO_RESERVE_MEM to TCP sockets and cap max value",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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} |