CVE-2022-49667 (GCVE-0-2022-49667)

Vulnerability from cvelistv5 – Published: 2025-02-26 02:24 – Updated: 2025-05-04 08:42
VLAI?
Title
net: bonding: fix use-after-free after 802.3ad slave unbind
Summary
In the Linux kernel, the following vulnerability has been resolved: net: bonding: fix use-after-free after 802.3ad slave unbind commit 0622cab0341c ("bonding: fix 802.3ad aggregator reselection"), resolve case, when there is several aggregation groups in the same bond. bond_3ad_unbind_slave will invalidate (clear) aggregator when __agg_active_ports return zero. So, ad_clear_agg can be executed even, when num_of_ports!=0. Than bond_3ad_unbind_slave can be executed again for, previously cleared aggregator. NOTE: at this time bond_3ad_unbind_slave will not update slave ports list, because lag_ports==NULL. So, here we got slave ports, pointing to freed aggregator memory. Fix with checking actual number of ports in group (as was before commit 0622cab0341c ("bonding: fix 802.3ad aggregator reselection") ), before ad_clear_agg(). The KASAN logs are as follows: [ 767.617392] ================================================================== [ 767.630776] BUG: KASAN: use-after-free in bond_3ad_state_machine_handler+0x13dc/0x1470 [ 767.638764] Read of size 2 at addr ffff00011ba9d430 by task kworker/u8:7/767 [ 767.647361] CPU: 3 PID: 767 Comm: kworker/u8:7 Tainted: G O 5.15.11 #15 [ 767.655329] Hardware name: DNI AmazonGo1 A7040 board (DT) [ 767.660760] Workqueue: lacp_1 bond_3ad_state_machine_handler [ 767.666468] Call trace: [ 767.668930] dump_backtrace+0x0/0x2d0 [ 767.672625] show_stack+0x24/0x30 [ 767.675965] dump_stack_lvl+0x68/0x84 [ 767.679659] print_address_description.constprop.0+0x74/0x2b8 [ 767.685451] kasan_report+0x1f0/0x260 [ 767.689148] __asan_load2+0x94/0xd0 [ 767.692667] bond_3ad_state_machine_handler+0x13dc/0x1470
CWE
Assigner
Impacted products
Vendor Product Version
Linux Linux Affected: 0622cab0341cac6b30da177b0faa39fae0680e71 , < a853b7a3a9fd1d74a4ccdd9cd73512b7dace2f1e (git)
Affected: 0622cab0341cac6b30da177b0faa39fae0680e71 , < b90ac60303063a43e17dd4aec159067599d255e6 (git)
Affected: 0622cab0341cac6b30da177b0faa39fae0680e71 , < f162f7c348fa2a5555bafdb5cc890b89b221e69c (git)
Affected: 0622cab0341cac6b30da177b0faa39fae0680e71 , < 893825289ba840afd86bfffcb6f7f363c73efff8 (git)
Affected: 0622cab0341cac6b30da177b0faa39fae0680e71 , < 63b2fe509f69b90168a75e04e14573dccf7984e6 (git)
Affected: 0622cab0341cac6b30da177b0faa39fae0680e71 , < ef0af7d08d26c5333ff4944a559279464edf6f15 (git)
Affected: 0622cab0341cac6b30da177b0faa39fae0680e71 , < 2765749def4765c5052a4c66445cf4c96fcccdbc (git)
Affected: 0622cab0341cac6b30da177b0faa39fae0680e71 , < 050133e1aa2cb49bb17be847d48a4431598ef562 (git)
Create a notification for this product.
    Linux Linux Affected: 4.7
Unaffected: 0 , < 4.7 (semver)
Unaffected: 4.9.322 , ≤ 4.9.* (semver)
Unaffected: 4.14.287 , ≤ 4.14.* (semver)
Unaffected: 4.19.251 , ≤ 4.19.* (semver)
Unaffected: 5.4.204 , ≤ 5.4.* (semver)
Unaffected: 5.10.129 , ≤ 5.10.* (semver)
Unaffected: 5.15.53 , ≤ 5.15.* (semver)
Unaffected: 5.18.10 , ≤ 5.18.* (semver)
Unaffected: 5.19 , ≤ * (original_commit_for_fix)
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Show details on NVD website

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\"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: bonding: fix use-after-free after 802.3ad slave unbind\\n\\ncommit 0622cab0341c (\\\"bonding: fix 802.3ad aggregator reselection\\\"),\\nresolve case, when there is several aggregation groups in the same bond.\\nbond_3ad_unbind_slave will invalidate (clear) aggregator when\\n__agg_active_ports return zero. So, ad_clear_agg can be executed even, when\\nnum_of_ports!=0. Than bond_3ad_unbind_slave can be executed again for,\\npreviously cleared aggregator. NOTE: at this time bond_3ad_unbind_slave\\nwill not update slave ports list, because lag_ports==NULL. So, here we\\ngot slave ports, pointing to freed aggregator memory.\\n\\nFix with checking actual number of ports in group (as was before\\ncommit 0622cab0341c (\\\"bonding: fix 802.3ad aggregator reselection\\\") ),\\nbefore ad_clear_agg().\\n\\nThe KASAN logs are as follows:\\n\\n[  767.617392] ==================================================================\\n[  767.630776] BUG: KASAN: use-after-free in bond_3ad_state_machine_handler+0x13dc/0x1470\\n[  767.638764] Read of size 2 at addr ffff00011ba9d430 by task kworker/u8:7/767\\n[  767.647361] CPU: 3 PID: 767 Comm: kworker/u8:7 Tainted: G           O 5.15.11 #15\\n[  767.655329] Hardware name: DNI AmazonGo1 A7040 board (DT)\\n[  767.660760] Workqueue: lacp_1 bond_3ad_state_machine_handler\\n[  767.666468] Call trace:\\n[  767.668930]  dump_backtrace+0x0/0x2d0\\n[  767.672625]  show_stack+0x24/0x30\\n[  767.675965]  dump_stack_lvl+0x68/0x84\\n[  767.679659]  print_address_description.constprop.0+0x74/0x2b8\\n[  767.685451]  kasan_report+0x1f0/0x260\\n[  767.689148]  __asan_load2+0x94/0xd0\\n[  767.692667]  bond_3ad_state_machine_handler+0x13dc/0x1470\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.9.322\", \"versionStartIncluding\": \"4.7\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.14.287\", \"versionStartIncluding\": \"4.7\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.251\", \"versionStartIncluding\": \"4.7\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.204\", \"versionStartIncluding\": \"4.7\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.129\", \"versionStartIncluding\": \"4.7\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.53\", \"versionStartIncluding\": \"4.7\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.18.10\", \"versionStartIncluding\": \"4.7\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.19\", \"versionStartIncluding\": \"4.7\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T08:42:54.979Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2022-49667\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-04T08:42:54.979Z\", \"dateReserved\": \"2025-02-26T02:21:30.436Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-02-26T02:24:01.818Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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Sightings

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  • 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.
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  • 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.


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