CVE-2023-52922 (GCVE-0-2023-52922)
Vulnerability from cvelistv5
Published
2024-11-28 15:09
Modified
2026-08-05 09:12
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: can: bcm: Fix UAF in bcm_proc_show() BUG: KASAN: slab-use-after-free in bcm_proc_show+0x969/0xa80 Read of size 8 at addr ffff888155846230 by task cat/7862 CPU: 1 PID: 7862 Comm: cat Not tainted 6.5.0-rc1-00153-gc8746099c197 #230 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014 Call Trace: <TASK> dump_stack_lvl+0xd5/0x150 print_report+0xc1/0x5e0 kasan_report+0xba/0xf0 bcm_proc_show+0x969/0xa80 seq_read_iter+0x4f6/0x1260 seq_read+0x165/0x210 proc_reg_read+0x227/0x300 vfs_read+0x1d5/0x8d0 ksys_read+0x11e/0x240 do_syscall_64+0x35/0xb0 entry_SYSCALL_64_after_hwframe+0x63/0xcd Allocated by task 7846: kasan_save_stack+0x1e/0x40 kasan_set_track+0x21/0x30 __kasan_kmalloc+0x9e/0xa0 bcm_sendmsg+0x264b/0x44e0 sock_sendmsg+0xda/0x180 ____sys_sendmsg+0x735/0x920 ___sys_sendmsg+0x11d/0x1b0 __sys_sendmsg+0xfa/0x1d0 do_syscall_64+0x35/0xb0 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 7846: kasan_save_stack+0x1e/0x40 kasan_set_track+0x21/0x30 kasan_save_free_info+0x27/0x40 ____kasan_slab_free+0x161/0x1c0 slab_free_freelist_hook+0x119/0x220 __kmem_cache_free+0xb4/0x2e0 rcu_core+0x809/0x1bd0 bcm_op is freed before procfs entry be removed in bcm_release(), this lead to bcm_proc_show() may read the freed bcm_op.
References
Impacted products
Vendor Product Version
Linux Linux Version: ffd980f976e7fd666c2e61bf8ab35107efd11828
Version: ffd980f976e7fd666c2e61bf8ab35107efd11828
Version: ffd980f976e7fd666c2e61bf8ab35107efd11828
Version: ffd980f976e7fd666c2e61bf8ab35107efd11828
Version: ffd980f976e7fd666c2e61bf8ab35107efd11828
Version: ffd980f976e7fd666c2e61bf8ab35107efd11828
Version: ffd980f976e7fd666c2e61bf8ab35107efd11828
Version: ffd980f976e7fd666c2e61bf8ab35107efd11828
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    "datePublished": "2024-11-28T15:09:51.360Z",
    "dateReserved": "2024-08-21T06:07:11.018Z",
    "dateUpdated": "2026-08-05T09:12:02.475Z",
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kernel list traversal and write-capable primitives typical of slab UAFs, supporting integrity compromise and control-flow hijacking.\\nA:H - UAF read of freed bcm_op causes kernel oops/GPF on bad pointers and can induce infinite list walks after reclaim, resulting in hard DoS.\"}]}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"ffd980f976e7fd666c2e61bf8ab35107efd11828\", \"lessThan\": \"11b8e27ed448baa385d90154a141466bd5e92f18\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"ffd980f976e7fd666c2e61bf8ab35107efd11828\", \"lessThan\": \"9b58d36d0c1ea29a9571e0222a9c29df0ccfb7ff\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"ffd980f976e7fd666c2e61bf8ab35107efd11828\", \"lessThan\": \"9533dbfac0ff7edd77a5fa2c24974b1d66c8b0a6\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"ffd980f976e7fd666c2e61bf8ab35107efd11828\", \"lessThan\": \"cf254b4f68e480e73dab055014e002b77aed30ed\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"ffd980f976e7fd666c2e61bf8ab35107efd11828\", \"lessThan\": \"3c3941bb1eb53abe7d640ffee5c4d6b559829ab3\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"ffd980f976e7fd666c2e61bf8ab35107efd11828\", \"lessThan\": \"995f47d76647708ec26c6e388663ad4f3f264787\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"ffd980f976e7fd666c2e61bf8ab35107efd11828\", \"lessThan\": \"dfd0aa26e9a07f2ce546ccf8304ead6a2914e8a7\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"ffd980f976e7fd666c2e61bf8ab35107efd11828\", \"lessThan\": \"55c3b96074f3f9b0aee19bf93cd71af7516582bb\", \"versionType\": \"git\"}], \"programFiles\": [\"net/can/bcm.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"2.6.25\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"2.6.25\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"4.14.322\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.14.*\"}, {\"status\": \"unaffected\", \"version\": \"4.19.291\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.251\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.188\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.123\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.42\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.4.7\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.4.*\"}, {\"status\": \"unaffected\", \"version\": \"6.5\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/can/bcm.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/11b8e27ed448baa385d90154a141466bd5e92f18\"}, {\"url\": \"https://git.kernel.org/stable/c/9b58d36d0c1ea29a9571e0222a9c29df0ccfb7ff\"}, {\"url\": \"https://git.kernel.org/stable/c/9533dbfac0ff7edd77a5fa2c24974b1d66c8b0a6\"}, {\"url\": \"https://git.kernel.org/stable/c/cf254b4f68e480e73dab055014e002b77aed30ed\"}, {\"url\": \"https://git.kernel.org/stable/c/3c3941bb1eb53abe7d640ffee5c4d6b559829ab3\"}, {\"url\": \"https://git.kernel.org/stable/c/995f47d76647708ec26c6e388663ad4f3f264787\"}, {\"url\": \"https://git.kernel.org/stable/c/dfd0aa26e9a07f2ce546ccf8304ead6a2914e8a7\"}, {\"url\": \"https://git.kernel.org/stable/c/55c3b96074f3f9b0aee19bf93cd71af7516582bb\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\ncan: bcm: Fix UAF in bcm_proc_show()\\n\\nBUG: KASAN: slab-use-after-free in bcm_proc_show+0x969/0xa80\\nRead of size 8 at addr ffff888155846230 by task cat/7862\\n\\nCPU: 1 PID: 7862 Comm: cat Not tainted 6.5.0-rc1-00153-gc8746099c197 #230\\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014\\nCall Trace:\\n \u003cTASK\u003e\\n dump_stack_lvl+0xd5/0x150\\n print_report+0xc1/0x5e0\\n kasan_report+0xba/0xf0\\n bcm_proc_show+0x969/0xa80\\n seq_read_iter+0x4f6/0x1260\\n seq_read+0x165/0x210\\n proc_reg_read+0x227/0x300\\n vfs_read+0x1d5/0x8d0\\n ksys_read+0x11e/0x240\\n do_syscall_64+0x35/0xb0\\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\\n\\nAllocated by task 7846:\\n kasan_save_stack+0x1e/0x40\\n kasan_set_track+0x21/0x30\\n __kasan_kmalloc+0x9e/0xa0\\n bcm_sendmsg+0x264b/0x44e0\\n sock_sendmsg+0xda/0x180\\n ____sys_sendmsg+0x735/0x920\\n ___sys_sendmsg+0x11d/0x1b0\\n __sys_sendmsg+0xfa/0x1d0\\n do_syscall_64+0x35/0xb0\\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\\n\\nFreed by task 7846:\\n kasan_save_stack+0x1e/0x40\\n kasan_set_track+0x21/0x30\\n kasan_save_free_info+0x27/0x40\\n ____kasan_slab_free+0x161/0x1c0\\n slab_free_freelist_hook+0x119/0x220\\n __kmem_cache_free+0xb4/0x2e0\\n rcu_core+0x809/0x1bd0\\n\\nbcm_op is freed before procfs entry be removed in bcm_release(),\\nthis lead to bcm_proc_show() may read the freed bcm_op.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.14.322\", \"versionStartIncluding\": \"2.6.25\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.291\", \"versionStartIncluding\": \"2.6.25\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.251\", \"versionStartIncluding\": \"2.6.25\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.188\", \"versionStartIncluding\": \"2.6.25\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.123\", \"versionStartIncluding\": \"2.6.25\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.42\", \"versionStartIncluding\": \"2.6.25\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.4.7\", \"versionStartIncluding\": \"2.6.25\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.5\", \"versionStartIncluding\": \"2.6.25\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T09:12:02.475Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-52922\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-05T09:12:02.475Z\", \"dateReserved\": \"2024-08-21T06:07:11.018Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-11-28T15:09:51.360Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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