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CVE-2022-48649— mm/slab_common: fix possible double free of kmem_cache

EPSS 0.02% · P5
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I. Basic Information for CVE-2022-48649

Vulnerability Information
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Vulnerability Title
mm/slab_common: fix possible double free of kmem_cache
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: mm/slab_common: fix possible double free of kmem_cache When doing slub_debug test, kfence's 'test_memcache_typesafe_by_rcu' kunit test case cause a use-after-free error: BUG: KASAN: use-after-free in kobject_del+0x14/0x30 Read of size 8 at addr ffff888007679090 by task kunit_try_catch/261 CPU: 1 PID: 261 Comm: kunit_try_catch Tainted: G B N 6.0.0-rc5-next-20220916 #17 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014 Call Trace: <TASK> dump_stack_lvl+0x34/0x48 print_address_description.constprop.0+0x87/0x2a5 print_report+0x103/0x1ed kasan_report+0xb7/0x140 kobject_del+0x14/0x30 kmem_cache_destroy+0x130/0x170 test_exit+0x1a/0x30 kunit_try_run_case+0xad/0xc0 kunit_generic_run_threadfn_adapter+0x26/0x50 kthread+0x17b/0x1b0 </TASK> The cause is inside kmem_cache_destroy(): kmem_cache_destroy acquire lock/mutex shutdown_cache schedule_work(kmem_cache_release) (if RCU flag set) release lock/mutex kmem_cache_release (if RCU flag not set) In some certain timing, the scheduled work could be run before the next RCU flag checking, which can then get a wrong value and lead to double kmem_cache_release(). Fix it by caching the RCU flag inside protected area, just like 'refcnt'
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
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，该漏洞源于内存双重释放。
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

VendorProductAffected VersionsCPESubscribe
LinuxLinux 357321557920c805de2b14832002465c320eea4f ~ c673c6ceac53fb2e631c9fbbd79957099a08927f -
LinuxLinux 5.19.8 ~ 5.19.12 -

II. Public POCs for CVE-2022-48649

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III. Intelligence Information for CVE-2022-48649

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Same Patch Batch · Linux · 2024-04-28 · 40 CVEs total

CVE-2022-48638cgroup: cgroup_get_from_id() must check the looked-up kn is a directory
CVE-2022-48647sfc: fix TX channel offset when using legacy interrupts
CVE-2022-48646sfc/siena: fix null pointer dereference in efx_hard_start_xmit
CVE-2022-48645net: enetc: deny offload of tc-based TSN features on VF interfaces
CVE-2022-48644net/sched: taprio: avoid disabling offload when it was never enabled
CVE-2022-48643netfilter: nf_tables: fix nft_counters_enabled underflow at nf_tables_addchain()
CVE-2022-48642netfilter: nf_tables: fix percpu memory leak at nf_tables_addchain()
CVE-2022-48641netfilter: ebtables: fix memory leak when blob is malformed
CVE-2022-48640bonding: fix NULL deref in bond_rr_gen_slave_id
CVE-2022-48639net: sched: fix possible refcount leak in tc_new_tfilter()
CVE-2022-48648sfc: fix null pointer dereference in efx_hard_start_xmit
CVE-2022-48637bnxt: prevent skb UAF after handing over to PTP worker
CVE-2022-48636s390/dasd: fix Oops in dasd_alias_get_start_dev due to missing pavgroup
CVE-2022-48635fsdax: Fix infinite loop in dax_iomap_rw()
CVE-2022-48634drm/gma500: Fix BUG: sleeping function called from invalid context errors
CVE-2022-48633drm/gma500: Fix WARN_ON(lock->magic != lock) error
CVE-2022-48632i2c: mlxbf: prevent stack overflow in mlxbf_i2c_smbus_start_transaction()
CVE-2022-48631ext4: fix bug in extents parsing when eh_entries == 0 and eh_depth > 0
CVE-2024-26928smb: client: fix potential UAF in cifs_debug_files_proc_show()
CVE-2024-26927ASoC: SOF: Add some bounds checking to firmware data

Showing top 20 of 40 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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