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CVE-2023-52609— binder: fix race between mmput() and do_exit()

Quick assessment

Affected
Linux Linux
Exploitation
Public or AI PoC available; prioritize validation
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mmput（）和do_exit（）之间存在竞争问题。

AI Predicted 5.3 Difficulty: Hard EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1055 · Process Injection

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 457b9a6f09f011ebcb9b52cc203a6331a6fc2de7< 95b1d336b0642198b56836b89908d07b9a0c9608 affected
457b9a6f09f011ebcb9b52cc203a6331a6fc2de7< 252a2a5569eb9f8d16428872cc24dea1ac0bb097 affected
457b9a6f09f011ebcb9b52cc203a6331a6fc2de7< 7e7a0d86542b0ea903006d3f42f33c4f7ead6918 affected
457b9a6f09f011ebcb9b52cc203a6331a6fc2de7< 98fee5bee97ad47b527a997d5786410430d1f0e9 affected
457b9a6f09f011ebcb9b52cc203a6331a6fc2de7< 6696f76c32ff67fec26823fc2df46498e70d9bf3 affected
457b9a6f09f011ebcb9b52cc203a6331a6fc2de7< 67f16bf2cc1698fd50e01ee8a2becc5a8e6d3a3e affected
457b9a6f09f011ebcb9b52cc203a6331a6fc2de7< 77d210e8db4d61d43b2d16df66b1ec46fad2ee01 affected
457b9a6f09f011ebcb9b52cc203a6331a6fc2de7< 9a9ab0d963621d9d12199df9817e66982582d5a5 affected
… +10 more rows
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I. Basic Information for CVE-2023-52609

Vulnerability Information
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Vulnerability Title
binder: fix race between mmput() and do_exit()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: binder: fix race between mmput() and do_exit() Task A calls binder_update_page_range() to allocate and insert pages on a remote address space from Task B. For this, Task A pins the remote mm via mmget_not_zero() first. This can race with Task B do_exit() and the final mmput() refcount decrement will come from Task A. Task A | Task B ------------------+------------------ mmget_not_zero() | | do_exit() | exit_mm() | mmput() mmput() | exit_mmap() | remove_vma() | fput() | In this case, the work of ____fput() from Task B is queued up in Task A as TWA_RESUME. So in theory, Task A returns to userspace and the cleanup work gets executed. However, Task A instead sleep, waiting for a reply from Task B that never comes (it's dead). This means the binder_deferred_release() is blocked until an unrelated binder event forces Task A to go back to userspace. All the associated death notifications will also be delayed until then. In order to fix this use mmput_async() that will schedule the work in the corresponding mm->async_put_work WQ instead of Task A.
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mmput（）和do_exit（）之间存在竞争问题。
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)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 457b9a6f09f011ebcb9b52cc203a6331a6fc2de7 ~ 95b1d336b0642198b56836b89908d07b9a0c9608 -
Linux Linux 2.6.29 -

II. Public POCs for CVE-2023-52609

# POC Description Source Link Shenlong Link
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default-local-qwen3.6 · 6145 chars
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III. Intelligence Information for CVE-2023-52609

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Mailing List Discussions for CVE-2023-52609 (2)

Other References for CVE-2023-52609 (6)

Same Patch Batch · Linux · 2024-03-18 · 21 CVEs total

CVE-2024-26641 8.6 HIGH ip6_tunnel: make sure to pull inner header in __ip6_tnl_rcv()
CVE-2023-52612 7.8 HIGH crypto: scomp - fix req->dst buffer overflow
CVE-2024-26640 7.8 HIGH tcp: add sanity checks to rx zerocopy
CVE-2024-26631 7.8 HIGH ipv6: mcast: fix data-race in ipv6_mc_down / mld_ifc_work
CVE-2024-26632 7.8 HIGH block: Fix iterating over an empty bio with bio_for_each_folio_all
CVE-2023-52614 7.8 HIGH PM / devfreq: Fix buffer overflow in trans_stat_show
CVE-2023-52616 7.8 HIGH crypto: lib/mpi - Fix unexpected pointer access in mpi_ec_init
CVE-2024-26637 7.8 HIGH wifi: ath11k: rely on mac80211 debugfs handling for vif
CVE-2023-52610 7.5 HIGH net/sched: act_ct: fix skb leak and crash on ooo frags
CVE-2024-26634 net: fix removing a namespace with conflicting altnames
CVE-2023-52619 pstore/ram: Fix crash when setting number of cpus to an odd number
CVE-2023-52618 block/rnbd-srv: Check for unlikely string overflow
CVE-2023-52617 PCI: switchtec: Fix stdev_release() crash after surprise hot remove
CVE-2024-26638 nbd: always initialize struct msghdr completely
CVE-2024-26636 llc: make llc_ui_sendmsg() more robust against bonding changes
CVE-2024-26635 llc: Drop support for ETH_P_TR_802_2.
CVE-2023-52615 hwrng: core - Fix page fault dead lock on mmap-ed hwrng
CVE-2024-26633 ip6_tunnel: fix NEXTHDR_FRAGMENT handling in ip6_tnl_parse_tlv_enc_lim()
CVE-2023-52613 drivers/thermal/loongson2_thermal: Fix incorrect PTR_ERR() judgment
CVE-2023-52611 wifi: rtw88: sdio: Honor the host max_req_size in the RX path

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2023-52609

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