Vulnerability-Lookup

GHSA-3HW4-PVHH-9QCQ

Vulnerability from github – Published: 2024-05-21 15:31 – Updated: 2025-03-06 15:34

Details

In the Linux kernel, the following vulnerability has been resolved:

coresight: tmc-etf: Fix global-out-of-bounds in tmc_update_etf_buffer()

commit 6f755e85c332 ("coresight: Add helper for inserting synchronization packets") removed trailing '\0' from barrier_pkt array and updated the call sites like etb_update_buffer() to have proper checks for barrier_pkt size before read but missed updating tmc_update_etf_buffer() which still reads barrier_pkt past the array size resulting in KASAN out-of-bounds bug. Fix this by adding a check for barrier_pkt size before accessing like it is done in etb_update_buffer().

BUG: KASAN: global-out-of-bounds in tmc_update_etf_buffer+0x4b8/0x698 Read of size 4 at addr ffffffd05b7d1030 by task perf/2629

Call trace: dump_backtrace+0x0/0x27c show_stack+0x20/0x2c dump_stack+0x11c/0x188 print_address_description+0x3c/0x4a4 __kasan_report+0x140/0x164 kasan_report+0x10/0x18 __asan_report_load4_noabort+0x1c/0x24 tmc_update_etf_buffer+0x4b8/0x698 etm_event_stop+0x248/0x2d8 etm_event_del+0x20/0x2c event_sched_out+0x214/0x6f0 group_sched_out+0xd0/0x270 ctx_sched_out+0x2ec/0x518 __perf_event_task_sched_out+0x4fc/0xe6c __schedule+0x1094/0x16a0 preempt_schedule_irq+0x88/0x170 arm64_preempt_schedule_irq+0xf0/0x18c el1_irq+0xe8/0x180 perf_event_exec+0x4d8/0x56c setup_new_exec+0x204/0x400 load_elf_binary+0x72c/0x18c0 search_binary_handler+0x13c/0x420 load_script+0x500/0x6c4 search_binary_handler+0x13c/0x420 exec_binprm+0x118/0x654 __do_execve_file+0x77c/0xba4 __arm64_compat_sys_execve+0x98/0xac el0_svc_common+0x1f8/0x5e0 el0_svc_compat_handler+0x84/0xb0 el0_svc_compat+0x10/0x50

The buggy address belongs to the variable: barrier_pkt+0x10/0x40

Memory state around the buggy address: ffffffd05b7d0f00: fa fa fa fa 04 fa fa fa fa fa fa fa 00 00 00 00 ffffffd05b7d0f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

ffffffd05b7d1000: 00 00 00 00 00 00 fa fa fa fa fa fa 00 00 00 03 ^ ffffffd05b7d1080: fa fa fa fa 00 02 fa fa fa fa fa fa 03 fa fa fa ffffffd05b7d1100: fa fa fa fa 00 00 00 00 05 fa fa fa fa fa fa fa ==================================================================

Severity ?

7.1 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2021-47346"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-125"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-05-21T15:15:21Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncoresight: tmc-etf: Fix global-out-of-bounds in tmc_update_etf_buffer()\n\ncommit 6f755e85c332 (\"coresight: Add helper for inserting synchronization\npackets\") removed trailing \u0027\\0\u0027 from barrier_pkt array and updated the\ncall sites like etb_update_buffer() to have proper checks for barrier_pkt\nsize before read but missed updating tmc_update_etf_buffer() which still\nreads barrier_pkt past the array size resulting in KASAN out-of-bounds\nbug. Fix this by adding a check for barrier_pkt size before accessing\nlike it is done in etb_update_buffer().\n\n BUG: KASAN: global-out-of-bounds in tmc_update_etf_buffer+0x4b8/0x698\n Read of size 4 at addr ffffffd05b7d1030 by task perf/2629\n\n Call trace:\n  dump_backtrace+0x0/0x27c\n  show_stack+0x20/0x2c\n  dump_stack+0x11c/0x188\n  print_address_description+0x3c/0x4a4\n  __kasan_report+0x140/0x164\n  kasan_report+0x10/0x18\n  __asan_report_load4_noabort+0x1c/0x24\n  tmc_update_etf_buffer+0x4b8/0x698\n  etm_event_stop+0x248/0x2d8\n  etm_event_del+0x20/0x2c\n  event_sched_out+0x214/0x6f0\n  group_sched_out+0xd0/0x270\n  ctx_sched_out+0x2ec/0x518\n  __perf_event_task_sched_out+0x4fc/0xe6c\n  __schedule+0x1094/0x16a0\n  preempt_schedule_irq+0x88/0x170\n  arm64_preempt_schedule_irq+0xf0/0x18c\n  el1_irq+0xe8/0x180\n  perf_event_exec+0x4d8/0x56c\n  setup_new_exec+0x204/0x400\n  load_elf_binary+0x72c/0x18c0\n  search_binary_handler+0x13c/0x420\n  load_script+0x500/0x6c4\n  search_binary_handler+0x13c/0x420\n  exec_binprm+0x118/0x654\n  __do_execve_file+0x77c/0xba4\n  __arm64_compat_sys_execve+0x98/0xac\n  el0_svc_common+0x1f8/0x5e0\n  el0_svc_compat_handler+0x84/0xb0\n  el0_svc_compat+0x10/0x50\n\n The buggy address belongs to the variable:\n  barrier_pkt+0x10/0x40\n\n Memory state around the buggy address:\n  ffffffd05b7d0f00: fa fa fa fa 04 fa fa fa fa fa fa fa 00 00 00 00\n  ffffffd05b7d0f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n \u003effffffd05b7d1000: 00 00 00 00 00 00 fa fa fa fa fa fa 00 00 00 03\n                                      ^\n  ffffffd05b7d1080: fa fa fa fa 00 02 fa fa fa fa fa fa 03 fa fa fa\n  ffffffd05b7d1100: fa fa fa fa 00 00 00 00 05 fa fa fa fa fa fa fa\n ==================================================================",
  "id": "GHSA-3hw4-pvhh-9qcq",
  "modified": "2025-03-06T15:34:35Z",
  "published": "2024-05-21T15:31:43Z",
  "references": [
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      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-47346"
    },
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      "type": "CVSS_V3"
    }
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}

CVE-2021-47346 (GCVE-0-2021-47346)

Vulnerability from cvelistv5 – Published: 2024-05-21 14:35 – Updated: 2025-05-04 07:09

Title

coresight: tmc-etf: Fix global-out-of-bounds in tmc_update_etf_buffer()

Summary

In the Linux kernel, the following vulnerability has been resolved: coresight: tmc-etf: Fix global-out-of-bounds in tmc_update_etf_buffer() commit 6f755e85c332 ("coresight: Add helper for inserting synchronization packets") removed trailing '\0' from barrier_pkt array and updated the call sites like etb_update_buffer() to have proper checks for barrier_pkt size before read but missed updating tmc_update_etf_buffer() which still reads barrier_pkt past the array size resulting in KASAN out-of-bounds bug. Fix this by adding a check for barrier_pkt size before accessing like it is done in etb_update_buffer(). BUG: KASAN: global-out-of-bounds in tmc_update_etf_buffer+0x4b8/0x698 Read of size 4 at addr ffffffd05b7d1030 by task perf/2629 Call trace: dump_backtrace+0x0/0x27c show_stack+0x20/0x2c dump_stack+0x11c/0x188 print_address_description+0x3c/0x4a4 __kasan_report+0x140/0x164 kasan_report+0x10/0x18 __asan_report_load4_noabort+0x1c/0x24 tmc_update_etf_buffer+0x4b8/0x698 etm_event_stop+0x248/0x2d8 etm_event_del+0x20/0x2c event_sched_out+0x214/0x6f0 group_sched_out+0xd0/0x270 ctx_sched_out+0x2ec/0x518 __perf_event_task_sched_out+0x4fc/0xe6c __schedule+0x1094/0x16a0 preempt_schedule_irq+0x88/0x170 arm64_preempt_schedule_irq+0xf0/0x18c el1_irq+0xe8/0x180 perf_event_exec+0x4d8/0x56c setup_new_exec+0x204/0x400 load_elf_binary+0x72c/0x18c0 search_binary_handler+0x13c/0x420 load_script+0x500/0x6c4 search_binary_handler+0x13c/0x420 exec_binprm+0x118/0x654 __do_execve_file+0x77c/0xba4 __arm64_compat_sys_execve+0x98/0xac el0_svc_common+0x1f8/0x5e0 el0_svc_compat_handler+0x84/0xb0 el0_svc_compat+0x10/0x50 The buggy address belongs to the variable: barrier_pkt+0x10/0x40 Memory state around the buggy address: ffffffd05b7d0f00: fa fa fa fa 04 fa fa fa fa fa fa fa 00 00 00 00 ffffffd05b7d0f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffffd05b7d1000: 00 00 00 00 00 00 fa fa fa fa fa fa 00 00 00 03 ^ ffffffd05b7d1080: fa fa fa fa 00 02 fa fa fa fa fa fa 03 fa fa fa ffffffd05b7d1100: fa fa fa fa 00 00 00 00 05 fa fa fa fa fa fa fa ==================================================================

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/04bd77ef4f4d9fc61…
	https://git.kernel.org/stable/c/ef0a06acc6b163886…
	https://git.kernel.org/stable/c/35c1c4bd2d59ad734…
	https://git.kernel.org/stable/c/733d4d95c0101d5f2…
	https://git.kernel.org/stable/c/0115687be7b139930…
	https://git.kernel.org/stable/c/5fae8a946ac2df879…

Impacted products

Vendor

Product

Version

Linux

Affected: 0c3fc4d5fa26092853278145aca9b21fa52a3e93 , < 04bd77ef4f4d9fc6102023b85f4590fc2130aac5 (git)
Affected: 0c3fc4d5fa26092853278145aca9b21fa52a3e93 , < ef0a06acc6b16388640ad367eedfa2a17f1945db (git)
Affected: 0c3fc4d5fa26092853278145aca9b21fa52a3e93 , < 35c1c4bd2d59ad734129d4e232af9d1098023918 (git)
Affected: 0c3fc4d5fa26092853278145aca9b21fa52a3e93 , < 733d4d95c0101d5f277b8e4910411d016e49a9dc (git)
Affected: 0c3fc4d5fa26092853278145aca9b21fa52a3e93 , < 0115687be7b13993066aef602253a53d55f5b11f (git)
Affected: 0c3fc4d5fa26092853278145aca9b21fa52a3e93 , < 5fae8a946ac2df879caf3f79a193d4766d00239b (git)

Linux

Affected: 4.14
Unaffected: 0 , < 4.14 (semver)
Unaffected: 4.19.198 , ≤ 4.19.* (semver)
Unaffected: 5.4.133 , ≤ 5.4.* (semver)
Unaffected: 5.10.51 , ≤ 5.10.* (semver)
Unaffected: 5.12.18 , ≤ 5.12.* (semver)
Unaffected: 5.13.3 , ≤ 5.13.* (semver)
Unaffected: 5.14 , ≤ * (original_commit_for_fix)

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        },
        {
          "url": "https://git.kernel.org/stable/c/35c1c4bd2d59ad734129d4e232af9d1098023918"
        },
        {
          "url": "https://git.kernel.org/stable/c/733d4d95c0101d5f277b8e4910411d016e49a9dc"
        },
        {
          "url": "https://git.kernel.org/stable/c/0115687be7b13993066aef602253a53d55f5b11f"
        },
        {
          "url": "https://git.kernel.org/stable/c/5fae8a946ac2df879caf3f79a193d4766d00239b"
        }
      ],
      "title": "coresight: tmc-etf: Fix global-out-of-bounds in tmc_update_etf_buffer()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2021-47346",
    "datePublished": "2024-05-21T14:35:52.284Z",
    "dateReserved": "2024-05-21T14:28:16.980Z",
    "dateUpdated": "2025-05-04T07:09:05.098Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

GHSA-3HW4-PVHH-9QCQ

CVE-2021-47346 (GCVE-0-2021-47346)

Tags

Sightings

Nomenclature