268 lines
14 KiB
JSON
268 lines
14 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-2026-68169",
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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": "2026-07-30T09:28:09.372Z",
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"datePublished": "2026-08-10T11:59:38.177Z",
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"dateUpdated": "2026-11-06T16:45:00.461Z"
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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": "2026-08-23T12:46:03.401Z"
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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\nmptcp: pm: userspace: fix use-after-free in get_local_id\n\nIn mptcp_pm_userspace_get_local_id(), the address entry is looked up under\nspinlock, but its id is read after dropping the lock. A concurrent deletion\ncan free the entry between the unlock and the read, leading to UAF.\n\nThe race window is narrow. It was reproduced only with a locally\nconstructed stress test that repeatedly overlaps an MP_JOIN SYN with a\nMPTCP_PM_CMD_SUBFLOW_DESTROY request.\n\nHowever, the KASAN report below confirms that the race is reachable:\n\n [ 666.319376] BUG: KASAN: slab-use-after-free in mptcp_userspace_pm_get_local_id+0x1dc/0x1f0\n [ 666.319386] Read of size 1 at addr ffff888124845610 by task swapper/0/0\n ...\n [ 666.319401] Call Trace:\n [ 666.319405] <IRQ>\n [ 666.319408] dump_stack_lvl+0x53/0x70\n [ 666.319412] print_address_description.constprop.0+0x2c/0x3b0\n [ 666.319418] print_report+0xbe/0x2b0\n [ 666.319421] ? mptcp_userspace_pm_get_local_id+0x1dc/0x1f0\n [ 666.319423] kasan_report+0xce/0x100\n [ 666.319426] ? mptcp_userspace_pm_get_local_id+0x1dc/0x1f0\n [ 666.319429] mptcp_userspace_pm_get_local_id+0x1dc/0x1f0\n [ 666.319433] mptcp_pm_get_local_id+0x371/0x440\n ...\n [ 666.319821] Allocated by task 45539:\n [ 666.319844] kasan_save_stack+0x33/0x60\n [ 666.319855] kasan_save_track+0x14/0x30\n [ 666.319858] __kasan_kmalloc+0x8f/0xa0\n [ 666.319863] __kmalloc_noprof+0x1e7/0x520\n [ 666.319867] sock_kmalloc+0xdf/0x130\n [ 666.319885] sock_kmemdup+0x1b/0x40\n [ 666.319888] mptcp_userspace_pm_append_new_local_addr+0x261/0x500\n [ 666.319910] mptcp_pm_nl_announce_doit+0x16a/0x610\n ...\n [ 666.319967] Freed by task 45560:\n [ 666.319988] kasan_save_stack+0x33/0x60\n [ 666.319991] kasan_save_track+0x14/0x30\n [ 666.319994] kasan_save_free_info+0x3b/0x60\n [ 666.319998] __kasan_slab_free+0x43/0x70\n [ 666.320000] kfree+0x166/0x440\n [ 666.320003] sock_kfree_s+0x1d/0x50\n [ 666.320007] mptcp_userspace_pm_delete_local_addr.isra.0+0x157/0x200\n [ 666.320011] mptcp_pm_nl_subflow_destroy_doit+0x51d/0xea0\n\nFix by copying the id into a local variable while still holding the lock,\nand use -1 as a \"not found\" sentinel."
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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/mptcp/pm_userspace.c"
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],
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"versions": [
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{
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"version": "e373bfc8ec3d6496ec7e11dd7f4d087a44b1009a",
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"lessThan": "8ce48d2879aafc0e7a6f8bfc3613c0ba979ec6f5",
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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": "ed34dfa19ddbd1e4c85a73636f8cba0211025ea4",
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"lessThan": "d2c3760b45f2f481a4dd4c5adef4a29dfabd948f",
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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": "f012d796a6de662692159c539689e47e662853a8",
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"lessThan": "31ce5af66891f79998fb2e8b8df08e3c98fd72e3",
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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": "f012d796a6de662692159c539689e47e662853a8",
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"lessThan": "d64f6c02495f3fad674038cfa7ec049671b59e7b",
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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": "f012d796a6de662692159c539689e47e662853a8",
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"lessThan": "40dde4b5d98279471a70e5c8bb713182738c00d9",
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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": "f012d796a6de662692159c539689e47e662853a8",
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"lessThan": "9bc6d5e4ca9f3cbb41d43400b3a31cb0403796c9",
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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": "005a3ad289eb604216dcaa03646de36cb08624a0",
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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": "6.1.79",
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"lessThan": "6.1.184",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.6.18",
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"lessThan": "6.6.151",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.7.6",
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"lessThan": "6.8",
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"status": "affected",
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"versionType": "semver"
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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/mptcp/pm_userspace.c"
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],
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"versions": [
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{
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"version": "6.8",
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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": "6.8",
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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": "6.1.184",
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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": "6.6.151",
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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": "6.12.103",
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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": "6.18.42",
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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": "7.1.6",
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"lessThanOrEqual": "7.1.*",
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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": "7.2",
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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": "6.1.79",
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"versionEndExcluding": "6.1.184"
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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": "6.6.18",
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"versionEndExcluding": "6.6.151"
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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": "6.8",
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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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/8ce48d2879aafc0e7a6f8bfc3613c0ba979ec6f5"
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},
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{
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"url": "https://git.kernel.org/stable/c/d2c3760b45f2f481a4dd4c5adef4a29dfabd948f"
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},
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{
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"url": "https://git.kernel.org/stable/c/31ce5af66891f79998fb2e8b8df08e3c98fd72e3"
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},
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{
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"url": "https://git.kernel.org/stable/c/d64f6c02495f3fad674038cfa7ec049671b59e7b"
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},
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{
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"url": "https://git.kernel.org/stable/c/40dde4b5d98279471a70e5c8bb713182738c00d9"
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},
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{
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"url": "https://git.kernel.org/stable/c/9bc6d5e4ca9f3cbb41d43400b3a31cb0403796c9"
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}
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],
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"title": "mptcp: pm: userspace: fix use-after-free in get_local_id",
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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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"id": "CVE-2026-68169",
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"role": "CISA Coordinator",
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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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"version": "2.0.3",
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"timestamp": "2026-11-06T16:43:39.883950Z"
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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": "2026-11-06T16:45:00.461Z"
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}
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}
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]
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}
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} |