CVE-2026-64468 (GCVE-0-2026-64468)

Vulnerability from cvelistv5 – Published: 2026-07-25 08:51 – Updated: 2026-07-27 05:01
VLAI
Title
binder: fix UAF in binder_free_transaction()
Summary
In the Linux kernel, the following vulnerability has been resolved: binder: fix UAF in binder_free_transaction() In binder_free_transaction(), the t->to_proc is read under the t->lock. However, once the t->lock is dropped, the to_proc can die in parallel. This leads to a use-after-free error when we attempt to acquire its inner lock right afterwards: ================================================================== BUG: KASAN: slab-use-after-free in _raw_spin_lock+0xe4/0x1a0 Write of size 4 at addr ffff00001125da70 by task B/672 CPU: 20 UID: 0 PID: 672 Comm: B Not tainted 7.1.0-rc6-00284-g8e65320d91cd #4 PREEMPT Hardware name: linux,dummy-virt (DT) Call trace: _raw_spin_lock+0xe4/0x1a0 binder_free_transaction+0x8c/0x320 binder_send_failed_reply+0x21c/0x2f8 binder_thread_release+0x488/0x7e0 binder_ioctl+0x12c0/0x29a0 [...] Allocated by task 675: __kmalloc_cache_noprof+0x174/0x444 binder_open+0x118/0xb70 do_dentry_open+0x374/0x1040 vfs_open+0x58/0x3bc [...] Freed by task 212: __kasan_slab_free+0x58/0x80 kfree+0x1a0/0x4a4 binder_proc_dec_tmpref+0x32c/0x5e0 binder_deferred_func+0xc48/0x104c process_one_work+0x53c/0xbc0 [...] ================================================================== To prevent this, pin the target thread (t->to_thread) to guarantee the target process remains alive. Undelivered transactions without a target thread are already safe, as the target process can only be the current context in those paths.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: a370003cc301d4361bae20c9ef615f89bf8d1e8a , < 5602a43f251c3d75312df91a422675fc00ca3dce (git)
Affected: a370003cc301d4361bae20c9ef615f89bf8d1e8a , < 0be901ab1dcc4af59b88f2e324493bb283850167 (git)
Affected: a370003cc301d4361bae20c9ef615f89bf8d1e8a , < 48aeda9f8039e4a6971d1804578efde7f2c01eda (git)
Affected: a370003cc301d4361bae20c9ef615f89bf8d1e8a , < 45df558c543bb5543bacc8065fd7c567740781e5 (git)
Affected: a370003cc301d4361bae20c9ef615f89bf8d1e8a , < d45ef513eed1abebfec90c3cfb6ae50c2a4182db (git)
Affected: a370003cc301d4361bae20c9ef615f89bf8d1e8a , < 328ccf32acb87e8bbb1fe2b065068c574e4db2bf (git)
Affected: a370003cc301d4361bae20c9ef615f89bf8d1e8a , < 0f15f0f6ca5df566275ce517f257af2559528b41 (git)
Affected: a370003cc301d4361bae20c9ef615f89bf8d1e8a , < f223d27a546c1e1f48d38fd67760e78f068fe8c4 (git)
Affected: a4a3c070b8760f71c8311399fa9bfe67c8629bca (git)
Affected: 22068d49d09d2b3890e19d7b2048a33340f992da (git)
Affected: 0e3b977a8f1be01dcfa0baae68851b1f55f2a0a9 (git)
Affected: 4.14.136 , < 4.15 (semver)
Affected: 4.19.64 , < 4.20 (semver)
Affected: 5.1.15 , < 5.2 (semver)
Create a notification for this product.
Linux Linux Affected: 5.2
Unaffected: 0 , < 5.2 (semver)
Unaffected: 5.10.261 , ≤ 5.10.* (semver)
Unaffected: 5.15.212 , ≤ 5.15.* (semver)
Unaffected: 6.1.178 , ≤ 6.1.* (semver)
Unaffected: 6.6.145 , ≤ 6.6.* (semver)
Unaffected: 6.12.96 , ≤ 6.12.* (semver)
Unaffected: 6.18.39 , ≤ 6.18.* (semver)
Unaffected: 7.1.4 , ≤ 7.1.* (semver)
Unaffected: 7.2-rc3 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbinder: fix UAF in binder_free_transaction()\n\nIn binder_free_transaction(), the t-\u003eto_proc is read under the t-\u003elock.\nHowever, once the t-\u003elock is dropped, the to_proc can die in parallel.\nThis leads to a use-after-free error when we attempt to acquire its\ninner lock right afterwards:\n\n  ==================================================================\n  BUG: KASAN: slab-use-after-free in _raw_spin_lock+0xe4/0x1a0\n  Write of size 4 at addr ffff00001125da70 by task B/672\n\n  CPU: 20 UID: 0 PID: 672 Comm: B Not tainted 7.1.0-rc6-00284-g8e65320d91cd #4 PREEMPT\n  Hardware name: linux,dummy-virt (DT)\n  Call trace:\n   _raw_spin_lock+0xe4/0x1a0\n   binder_free_transaction+0x8c/0x320\n   binder_send_failed_reply+0x21c/0x2f8\n   binder_thread_release+0x488/0x7e0\n   binder_ioctl+0x12c0/0x29a0\n  [...]\n\n  Allocated by task 675:\n   __kmalloc_cache_noprof+0x174/0x444\n   binder_open+0x118/0xb70\n   do_dentry_open+0x374/0x1040\n   vfs_open+0x58/0x3bc\n  [...]\n\n  Freed by task 212:\n   __kasan_slab_free+0x58/0x80\n   kfree+0x1a0/0x4a4\n   binder_proc_dec_tmpref+0x32c/0x5e0\n   binder_deferred_func+0xc48/0x104c\n   process_one_work+0x53c/0xbc0\n  [...]\n  ==================================================================\n\nTo prevent this, pin the target thread (t-\u003eto_thread) to guarantee the\ntarget process remains alive. Undelivered transactions without a target\nthread are already safe, as the target process can only be the current\ncontext in those paths."
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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          "url": "https://git.kernel.org/stable/c/45df558c543bb5543bacc8065fd7c567740781e5"
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        {
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      "title": "binder: fix UAF in binder_free_transaction()",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64468",
    "datePublished": "2026-07-25T08:51:33.364Z",
    "dateReserved": "2026-07-19T15:36:31.790Z",
    "dateUpdated": "2026-07-27T05:01:22.679Z",
    "state": "PUBLISHED"
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  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-64468",
      "date": "2026-08-01",
      "epss": "0.00135",
      "percentile": "0.03383"
    },
    "microsoft_vex": {
      "current_release_date": "2026-07-27T14:43:39.000Z",
      "cve": "CVE-2026-64468",
      "id": "msrc_CVE-2026-64468",
      "initial_release_date": "2026-07-26T01:12:42.000Z",
      "product_status:known_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "binder: fix UAF in binder_free_transaction()",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-64468.json",
      "version": "2"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-64468\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-07-25T10:17:32.103\",\"lastModified\":\"2026-07-27T05:16:52.920\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nbinder: fix UAF in binder_free_transaction()\\n\\nIn binder_free_transaction(), the t-\u003eto_proc is read under the t-\u003elock.\\nHowever, once the t-\u003elock is dropped, the to_proc can die in parallel.\\nThis leads to a use-after-free error when we attempt to acquire its\\ninner lock right afterwards:\\n\\n  ==================================================================\\n  BUG: KASAN: slab-use-after-free in _raw_spin_lock+0xe4/0x1a0\\n  Write of size 4 at addr ffff00001125da70 by task B/672\\n\\n  CPU: 20 UID: 0 PID: 672 Comm: B Not tainted 7.1.0-rc6-00284-g8e65320d91cd #4 PREEMPT\\n  Hardware name: linux,dummy-virt (DT)\\n  Call trace:\\n   _raw_spin_lock+0xe4/0x1a0\\n   binder_free_transaction+0x8c/0x320\\n   binder_send_failed_reply+0x21c/0x2f8\\n   binder_thread_release+0x488/0x7e0\\n   binder_ioctl+0x12c0/0x29a0\\n  [...]\\n\\n  Allocated by task 675:\\n   __kmalloc_cache_noprof+0x174/0x444\\n   binder_open+0x118/0xb70\\n   do_dentry_open+0x374/0x1040\\n   vfs_open+0x58/0x3bc\\n  [...]\\n\\n  Freed by task 212:\\n   __kasan_slab_free+0x58/0x80\\n   kfree+0x1a0/0x4a4\\n   binder_proc_dec_tmpref+0x32c/0x5e0\\n   binder_deferred_func+0xc48/0x104c\\n   process_one_work+0x53c/0xbc0\\n  [...]\\n  ==================================================================\\n\\nTo prevent this, pin the target thread (t-\u003eto_thread) to guarantee the\\ntarget process remains alive. Undelivered transactions without a target\\nthread are already safe, as the target process can only be the current\\ncontext in those paths.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/android/binder.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"a370003cc301d4361bae20c9ef615f89bf8d1e8a\",\"lessThan\":\"5602a43f251c3d75312df91a422675fc00ca3dce\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a370003cc301d4361bae20c9ef615f89bf8d1e8a\",\"lessThan\":\"0be901ab1dcc4af59b88f2e324493bb283850167\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a370003cc301d4361bae20c9ef615f89bf8d1e8a\",\"lessThan\":\"48aeda9f8039e4a6971d1804578efde7f2c01eda\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a370003cc301d4361bae20c9ef615f89bf8d1e8a\",\"lessThan\":\"45df558c543bb5543bacc8065fd7c567740781e5\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a370003cc301d4361bae20c9ef615f89bf8d1e8a\",\"lessThan\":\"d45ef513eed1abebfec90c3cfb6ae50c2a4182db\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a370003cc301d4361bae20c9ef615f89bf8d1e8a\",\"lessThan\":\"328ccf32acb87e8bbb1fe2b065068c574e4db2bf\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a370003cc301d4361bae20c9ef615f89bf8d1e8a\",\"lessThan\":\"0f15f0f6ca5df566275ce517f257af2559528b41\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a370003cc301d4361bae20c9ef615f89bf8d1e8a\",\"lessThan\":\"f223d27a546c1e1f48d38fd67760e78f068fe8c4\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a4a3c070b8760f71c8311399fa9bfe67c8629bca\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"22068d49d09d2b3890e19d7b2048a33340f992da\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"0e3b977a8f1be01dcfa0baae68851b1f55f2a0a9\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4.14.136\",\"lessThan\":\"4.15\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"4.19.64\",\"lessThan\":\"4.20\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.1.15\",\"lessThan\":\"5.2\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/android/binder.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.2\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.2\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.261\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.212\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.178\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.145\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.96\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.39\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.4\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2-rc3\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0be901ab1dcc4af59b88f2e324493bb283850167\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/0f15f0f6ca5df566275ce517f257af2559528b41\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/328ccf32acb87e8bbb1fe2b065068c574e4db2bf\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/45df558c543bb5543bacc8065fd7c567740781e5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/48aeda9f8039e4a6971d1804578efde7f2c01eda\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5602a43f251c3d75312df91a422675fc00ca3dce\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d45ef513eed1abebfec90c3cfb6ae50c2a4182db\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f223d27a546c1e1f48d38fd67760e78f068fe8c4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-30T03:45:10+00:00",
      "cve": "CVE-2026-64468",
      "id": "CVE-2026-64468",
      "initial_release_date": "2026-07-25T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: binder: fix UAF in binder_free_transaction()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64468.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "not set",
      "current_release_date": "2026-07-25T15:58:45Z",
      "cve": "CVE-2026-64468",
      "id": "CVE-2026-64468",
      "initial_release_date": "2026-07-25T15:58:45Z",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-64468",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64468.json",
      "version": "2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.