227 lines
12 KiB
JSON
227 lines
12 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-2026-98588",
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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": "2026-09-25T10:25:14.358Z",
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"datePublished": "2026-10-18T15:19:00.934Z",
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"dateUpdated": "2026-10-19T09:22:13.833Z"
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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": "2026-10-19T09:22:13.833Z"
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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\nbpf, sockmap: Reject max_entries > INT_MAX in sock_map_alloc\n\nsock_map_alloc() only rejects max_entries == 0 and otherwise allows any\nu32 value. sock_map_free() then walks the sks[] array with a signed int\niterator:\n\n\tint i;\n\tfor (i = 0; i < stab->map.max_entries; i++)\n\t\tstruct sock **psk = &stab->sks[i];\n\nWhen a SOCKMAP is created with max_entries = 0xffffffff (UINT_MAX), the\nallocation of 32 GiB can succeed on large-memory hosts. During free the\ncounter reaches 0x80000000, wraps to INT_MIN, is sign-extended by movslq\nand turned into a ~16 GiB negative offset from stab->sks, pointing far\nbelow the allocation.\n\nThe faulting access is an xchg() write in sock_map_free(). Without\nKASAN, the same out-of-bounds write can fault on an unmapped vmalloc page\nor corrupt an unrelated allocation if that vmalloc address is populated.\nOn a KASAN kernel with CONFIG_KASAN_VMALLOC=y, the shadow check for that\naddress hits an unmapped shadow page and oopses first:\n\n BUG: unable to handle page fault for address: fffff521b59c5a00\n RIP: 0010:kasan_check_range+0x107/0x190\n Call Trace:\n sock_map_free+0x93/0x190\n map_create+0x68d/0xb30\n __sys_bpf+0x21e/0x2e70\n\nVmcore confirmed stab->map.max_entries == 0xffffffff, stab->sks ==\n0xffffc911ace2d000, and the faulting address sks + (s64)INT_MIN * 8\nexactly at 0xffffc90dace2d000. The same buggy path is reached on the\nnormal close()/bpf_map_free_deferred() path whenever such a map is\ndestroyed.\n\nsock_map_alloc() used to bound its allocation size through\nbpf_map_charge_init(), but the bound was dropped when rlimit-based memory\naccounting was removed. Reject max_entries > INT_MAX at creation time so\nthe signed iterator in sock_map_free() never sees a value that would\noverflow.\n\nTriggered by syzkaller and reproduced on both a 6.6-based KASAN kernel\nand the upstream v7.3-rc2 kernel."
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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_map.c"
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],
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"versions": [
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{
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"version": "0d2c4f9640501ff57ba0be1f5644a02c29a02fa1",
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"lessThan": "f4a73f49e256bd835368504462be3b57b03febff",
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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": "0d2c4f9640501ff57ba0be1f5644a02c29a02fa1",
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"lessThan": "c56191af3a578b9cc265fa3bd5fc0752c59c1781",
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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": "0d2c4f9640501ff57ba0be1f5644a02c29a02fa1",
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"lessThan": "909f761868fda329dc69130ef9eb5b5795bcdf00",
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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": "0d2c4f9640501ff57ba0be1f5644a02c29a02fa1",
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"lessThan": "cc70972ddbf0e3398f2f32624d31db78594d50d8",
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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": "0d2c4f9640501ff57ba0be1f5644a02c29a02fa1",
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"lessThan": "cea597519b9ca6d691c98d92460ead8ece2a07af",
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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": "0d2c4f9640501ff57ba0be1f5644a02c29a02fa1",
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"lessThan": "ba7d627dbc67d62df2fa66d7b41e743c3ace0ec8",
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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": "0d2c4f9640501ff57ba0be1f5644a02c29a02fa1",
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"lessThan": "814a81c842bd88f6bd8a4ce550d560df071a5d03",
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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_map.c"
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],
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"versions": [
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{
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"version": "5.11",
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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": "5.11",
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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": "5.15.222",
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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": "6.1.189",
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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": "6.6.158",
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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": "6.12.112",
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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": "6.18.55",
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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": "7.2.9",
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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": "5.11",
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"versionEndExcluding": "5.15.222"
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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": "5.11",
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"versionEndExcluding": "6.1.189"
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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": "5.11",
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"versionEndExcluding": "6.6.158"
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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": "5.11",
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"versionEndExcluding": "6.12.112"
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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": "5.11",
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"versionEndExcluding": "6.18.55"
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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": "5.11",
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"versionEndExcluding": "7.2.9"
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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": "5.11",
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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/f4a73f49e256bd835368504462be3b57b03febff"
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},
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{
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"url": "https://git.kernel.org/stable/c/c56191af3a578b9cc265fa3bd5fc0752c59c1781"
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},
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{
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"url": "https://git.kernel.org/stable/c/909f761868fda329dc69130ef9eb5b5795bcdf00"
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},
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{
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"url": "https://git.kernel.org/stable/c/cc70972ddbf0e3398f2f32624d31db78594d50d8"
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},
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{
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"url": "https://git.kernel.org/stable/c/cea597519b9ca6d691c98d92460ead8ece2a07af"
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},
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{
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"url": "https://git.kernel.org/stable/c/ba7d627dbc67d62df2fa66d7b41e743c3ace0ec8"
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},
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{
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"url": "https://git.kernel.org/stable/c/814a81c842bd88f6bd8a4ce550d560df071a5d03"
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}
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],
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"title": "bpf, sockmap: Reject max_entries > INT_MAX in sock_map_alloc",
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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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}
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} |