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CVE-2024-50084— net: microchip: vcap api: Fix memory leaks in vcap_api_encode_rule_test()

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于在vcap_api_encode_rule_test函数中存在内存泄漏，未正确释放分配的内存。

AI Predicted 3.7 Difficulty: Trivial EPSS 0.21% · P10

Possible ATT&CK Techniques 1 AI

T1211 · Exploitation for Stealth

Affected Version Matrix 11

VendorProduct Version RangeStatus
Linux Linux b0804c286ccfcf5f5c004d5bf8a54c0508b5e86b< 20b5342de51bda794791e013b90754774003a515 affected
a3c1e45156ad39f225cd7ddae0f81230a3b1e657< 170792097bb21e5da77443b6a03d35489813eabe affected
a3c1e45156ad39f225cd7ddae0f81230a3b1e657< 217a3d98d1e9891a8b1438a27dfbc64ddf01f691 affected
f7fe95f40c85311c98913fe6ae2c56adb7f767a7 affected
6.6.51< 6.6.58 affected
6.10.10< 6.11 affected
6.11 affected
< 6.11 unaffected
… +3 more rows
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I. Basic Information for CVE-2024-50084

Vulnerability Information
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Vulnerability Title
net: microchip: vcap api: Fix memory leaks in vcap_api_encode_rule_test()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: microchip: vcap api: Fix memory leaks in vcap_api_encode_rule_test() Commit a3c1e45156ad ("net: microchip: vcap: Fix use-after-free error in kunit test") fixed the use-after-free error, but introduced below memory leaks by removing necessary vcap_free_rule(), add it to fix it. unreferenced object 0xffffff80ca58b700 (size 192): comm "kunit_try_catch", pid 1215, jiffies 4294898264 hex dump (first 32 bytes): 00 12 7a 00 05 00 00 00 0a 00 00 00 64 00 00 00 ..z.........d... 00 00 00 00 00 00 00 00 00 04 0b cc 80 ff ff ff ................ backtrace (crc 9c09c3fe): [<0000000052a0be73>] kmemleak_alloc+0x34/0x40 [<0000000043605459>] __kmalloc_cache_noprof+0x26c/0x2f4 [<0000000040a01b8d>] vcap_alloc_rule+0x3cc/0x9c4 [<000000003fe86110>] vcap_api_encode_rule_test+0x1ac/0x16b0 [<00000000b3595fc4>] kunit_try_run_case+0x13c/0x3ac [<0000000010f5d2bf>] kunit_generic_run_threadfn_adapter+0x80/0xec [<00000000c5d82c9a>] kthread+0x2e8/0x374 [<00000000f4287308>] ret_from_fork+0x10/0x20 unreferenced object 0xffffff80cc0b0400 (size 64): comm "kunit_try_catch", pid 1215, jiffies 4294898265 hex dump (first 32 bytes): 80 04 0b cc 80 ff ff ff 18 b7 58 ca 80 ff ff ff ..........X..... 39 00 00 00 02 00 00 00 06 05 04 03 02 01 ff ff 9............... backtrace (crc daf014e9): [<0000000052a0be73>] kmemleak_alloc+0x34/0x40 [<0000000043605459>] __kmalloc_cache_noprof+0x26c/0x2f4 [<000000000ff63fd4>] vcap_rule_add_key+0x2cc/0x528 [<00000000dfdb1e81>] vcap_api_encode_rule_test+0x224/0x16b0 [<00000000b3595fc4>] kunit_try_run_case+0x13c/0x3ac [<0000000010f5d2bf>] kunit_generic_run_threadfn_adapter+0x80/0xec [<00000000c5d82c9a>] kthread+0x2e8/0x374 [<00000000f4287308>] ret_from_fork+0x10/0x20 unreferenced object 0xffffff80cc0b0700 (size 64): comm "kunit_try_catch", pid 1215, jiffies 4294898265 hex dump (first 32 bytes): 80 07 0b cc 80 ff ff ff 28 b7 58 ca 80 ff ff ff ........(.X..... 3c 00 00 00 00 00 00 00 01 2f 03 b3 ec ff ff ff <......../...... backtrace (crc 8d877792): [<0000000052a0be73>] kmemleak_alloc+0x34/0x40 [<0000000043605459>] __kmalloc_cache_noprof+0x26c/0x2f4 [<000000006eadfab7>] vcap_rule_add_action+0x2d0/0x52c [<00000000323475d1>] vcap_api_encode_rule_test+0x4d4/0x16b0 [<00000000b3595fc4>] kunit_try_run_case+0x13c/0x3ac [<0000000010f5d2bf>] kunit_generic_run_threadfn_adapter+0x80/0xec [<00000000c5d82c9a>] kthread+0x2e8/0x374 [<00000000f4287308>] ret_from_fork+0x10/0x20 unreferenced object 0xffffff80cc0b0900 (size 64): comm "kunit_try_catch", pid 1215, jiffies 4294898266 hex dump (first 32 bytes): 80 09 0b cc 80 ff ff ff 80 06 0b cc 80 ff ff ff ................ 7d 00 00 00 01 00 00 00 00 00 00 00 ff 00 00 00 }............... backtrace (crc 34181e56): [<0000000052a0be73>] kmemleak_alloc+0x34/0x40 [<0000000043605459>] __kmalloc_cache_noprof+0x26c/0x2f4 [<000000000ff63fd4>] vcap_rule_add_key+0x2cc/0x528 [<00000000991e3564>] vcap_val_rule+0xcf0/0x13e8 [<00000000fc9868e5>] vcap_api_encode_rule_test+0x678/0x16b0 [<00000000b3595fc4>] kunit_try_run_case+0x13c/0x3ac [<0000000010f5d2bf>] kunit_generic_run_threadfn_adapter+0x80/0xec [<00000000c5d82c9a>] kthread+0x2e8/0x374 [<00000000f4287308>] ret_from_fork+0x10/0x20 unreferenced object 0xffffff80cc0b0980 (size 64): comm "kunit_try_catch", pid 1215, jiffies 4294898266 hex dump (first 32 bytes): 18 b7 58 ca 80 ff ff ff 00 09 0b cc 80 ff ff ff ..X............. 67 00 00 00 00 00 00 00 01 01 74 88 c0 ff ff ff g.........t..... backtrace (crc 275fd9be): [<0000000052a0be73>] kmemleak_alloc+0x34/0x40 [<0000000043605459>] __kmalloc_cache_noprof+0x26c/0x2f4 [<000000000ff63fd4>] vcap_rule_add_key+0x2cc/0x528 [<000000001396a1a2>] test_add_de ---truncated---
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于在vcap_api_encode_rule_test函数中存在内存泄漏，未正确释放分配的内存。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux b0804c286ccfcf5f5c004d5bf8a54c0508b5e86b ~ 20b5342de51bda794791e013b90754774003a515 -
Linux Linux 6.11 -

II. Public POCs for CVE-2024-50084

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III. Intelligence Information for CVE-2024-50084

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Patches & Fixes for CVE-2024-50084 (1)

Same Patch Batch · Linux · 2024-10-29 · 21 CVEs total

CVE-2024-50086 9.8 CRITICAL ksmbd: fix user-after-free from session log off
CVE-2024-50085 9.8 CRITICAL mptcp: pm: fix UaF read in mptcp_pm_nl_rm_addr_or_subflow
CVE-2024-50075 8.0 HIGH xhci: tegra: fix checked USB2 port number
CVE-2024-50087 7.8 HIGH btrfs: fix uninitialized pointer free on read_alloc_one_name() error
CVE-2024-50073 7.8 HIGH tty: n_gsm: Fix use-after-free in gsm_cleanup_mux
CVE-2024-50074 7.8 HIGH parport: Proper fix for array out-of-bounds access
CVE-2024-50077 7.8 HIGH Bluetooth: ISO: Fix multiple init when debugfs is disabled
CVE-2024-50078 7.8 HIGH Bluetooth: Call iso_exit() on module unload
CVE-2024-50082 7.8 HIGH blk-rq-qos: fix crash on rq_qos_wait vs. rq_qos_wake_function race
CVE-2024-50088 7.8 HIGH btrfs: fix uninitialized pointer free in add_inode_ref()
CVE-2024-50079 io_uring/sqpoll: ensure task state is TASK_RUNNING when running task_work
CVE-2024-50080 ublk: don't allow user copy for unprivileged device
CVE-2024-50081 blk-mq: setup queue ->tag_set before initializing hctx
CVE-2024-50076 vt: prevent kernel-infoleak in con_font_get()
CVE-2024-50083 tcp: fix mptcp DSS corruption due to large pmtu xmit
CVE-2024-50072 x86/bugs: Use code segment selector for VERW operand
CVE-2024-50071 pinctrl: nuvoton: fix a double free in ma35_pinctrl_dt_node_to_map_func()
CVE-2024-50070 pinctrl: stm32: check devm_kasprintf() returned value
CVE-2024-50069 pinctrl: apple: check devm_kasprintf() returned value
CVE-2024-50068 mm/damon/tests/sysfs-kunit.h: fix memory leak in damon_sysfs_test_add_targets()

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-50084

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