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CVE-2023-52635— PM / devfreq: Synchronize devfreq_monitor_[start/stop]

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，该漏洞源于如果在循环中频繁切换调速器，有可能会导致计时器列表损坏。

AI Predicted 5.5 Difficulty: Hard EPSS 0.23% · P13

Possible ATT&CK Techniques 1 AI

T1206

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux 7e6fdd4bad033fa2d73716377b184fa975b0d985< 3399cc7013e761fee9d6eec795e9b31ab0cbe475 affected
7e6fdd4bad033fa2d73716377b184fa975b0d985< 099f6a9edbe30b142c1d97fe9a4748601d995675 affected
7e6fdd4bad033fa2d73716377b184fa975b0d985< 31569995fc65007b73a3fff605ec2b3401b435e9 affected
7e6fdd4bad033fa2d73716377b184fa975b0d985< 0aedb319ef3ed39e9e5a7b7726c8264ca627bbd9 affected
7e6fdd4bad033fa2d73716377b184fa975b0d985< ae815e2fdc284ab31651d52460698bd89c0fce22 affected
7e6fdd4bad033fa2d73716377b184fa975b0d985< aed5ed595960c6d301dcd4ed31aeaa7a8054c0c6 affected
3.8 affected
< 3.8 unaffected
… +6 more rows
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I. Basic Information for CVE-2023-52635

Vulnerability Information
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Vulnerability Title
PM / devfreq: Synchronize devfreq_monitor_[start/stop]
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: PM / devfreq: Synchronize devfreq_monitor_[start/stop] There is a chance if a frequent switch of the governor done in a loop result in timer list corruption where timer cancel being done from two place one from cancel_delayed_work_sync() and followed by expire_timers() can be seen from the traces[1]. while true do echo "simple_ondemand" > /sys/class/devfreq/1d84000.ufshc/governor echo "performance" > /sys/class/devfreq/1d84000.ufshc/governor done It looks to be issue with devfreq driver where device_monitor_[start/stop] need to synchronized so that delayed work should get corrupted while it is either being queued or running or being cancelled. Let's use polling flag and devfreq lock to synchronize the queueing the timer instance twice and work data being corrupted. [1] ... .. <idle>-0 [003] 9436.209662: timer_cancel timer=0xffffff80444f0428 <idle>-0 [003] 9436.209664: timer_expire_entry timer=0xffffff80444f0428 now=0x10022da1c function=__typeid__ZTSFvP10timer_listE_global_addr baseclk=0x10022da1c <idle>-0 [003] 9436.209718: timer_expire_exit timer=0xffffff80444f0428 kworker/u16:6-14217 [003] 9436.209863: timer_start timer=0xffffff80444f0428 function=__typeid__ZTSFvP10timer_listE_global_addr expires=0x10022da2b now=0x10022da1c flags=182452227 vendor.xxxyyy.ha-1593 [004] 9436.209888: timer_cancel timer=0xffffff80444f0428 vendor.xxxyyy.ha-1593 [004] 9436.216390: timer_init timer=0xffffff80444f0428 vendor.xxxyyy.ha-1593 [004] 9436.216392: timer_start timer=0xffffff80444f0428 function=__typeid__ZTSFvP10timer_listE_global_addr expires=0x10022da2c now=0x10022da1d flags=186646532 vendor.xxxyyy.ha-1593 [005] 9436.220992: timer_cancel timer=0xffffff80444f0428 xxxyyyTraceManag-7795 [004] 9436.261641: timer_cancel timer=0xffffff80444f0428 [2] 9436.261653][ C4] Unable to handle kernel paging request at virtual address dead00000000012a [ 9436.261664][ C4] Mem abort info: [ 9436.261666][ C4] ESR = 0x96000044 [ 9436.261669][ C4] EC = 0x25: DABT (current EL), IL = 32 bits [ 9436.261671][ C4] SET = 0, FnV = 0 [ 9436.261673][ C4] EA = 0, S1PTW = 0 [ 9436.261675][ C4] Data abort info: [ 9436.261677][ C4] ISV = 0, ISS = 0x00000044 [ 9436.261680][ C4] CM = 0, WnR = 1 [ 9436.261682][ C4] [dead00000000012a] address between user and kernel address ranges [ 9436.261685][ C4] Internal error: Oops: 96000044 [#1] PREEMPT SMP [ 9436.261701][ C4] Skip md ftrace buffer dump for: 0x3a982d0 ... [ 9436.262138][ C4] CPU: 4 PID: 7795 Comm: TraceManag Tainted: G S W O 5.10.149-android12-9-o-g17f915d29d0c #1 [ 9436.262141][ C4] Hardware name: Qualcomm Technologies, Inc. (DT) [ 9436.262144][ C4] pstate: 22400085 (nzCv daIf +PAN -UAO +TCO BTYPE=--) [ 9436.262161][ C4] pc : expire_timers+0x9c/0x438 [ 9436.262164][ C4] lr : expire_timers+0x2a4/0x438 [ 9436.262168][ C4] sp : ffffffc010023dd0 [ 9436.262171][ C4] x29: ffffffc010023df0 x28: ffffffd0636fdc18 [ 9436.262178][ C4] x27: ffffffd063569dd0 x26: ffffffd063536008 [ 9436.262182][ C4] x25: 0000000000000001 x24: ffffff88f7c69280 [ 9436.262185][ C4] x23: 00000000000000e0 x22: dead000000000122 [ 9436.262188][ C4] x21: 000000010022da29 x20: ffffff8af72b4e80 [ 9436.262191][ C4] x19: ffffffc010023e50 x18: ffffffc010025038 [ 9436.262195][ C4] x17: 0000000000000240 x16: 0000000000000201 [ 9436.262199][ C4] x15: ffffffffffffffff x14: ffffff889f3c3100 [ 9436.262203][ C4] x13: ffffff889f3c3100 x12: 00000000049f56b8 [ 9436.262207][ C4] x11: 00000000049f56b8 x10: 00000000ffffffff [ 9436.262212][ C4] x9 : ffffffc010023e50 x8 : dead000000000122 [ 9436.262216][ C4] x7 : ffffffffffffffff x6 : ffffffc0100239d8 [ 9436.262220][ C4] x5 : 0000000000000000 x4 : 0000000000000101 [ 9436.262223][ C4] x3 : 0000000000000080 x2 : ffffff8 ---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，该漏洞源于如果在循环中频繁切换调速器，有可能会导致计时器列表损坏。
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 7e6fdd4bad033fa2d73716377b184fa975b0d985 ~ 3399cc7013e761fee9d6eec795e9b31ab0cbe475 -
Linux Linux 3.8 -

II. Public POCs for CVE-2023-52635

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III. Intelligence Information for CVE-2023-52635

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Mailing List Discussions for CVE-2023-52635 (1)

Other References for CVE-2023-52635 (6)

Same Patch Batch · Linux · 2024-04-02 · 35 CVEs total

CVE-2024-26665 9.1 CRITICAL tunnels: fix out of bounds access when building IPv6 PMTU error
CVE-2023-52636 8.2 HIGH libceph: just wait for more data to be available on the socket
CVE-2024-26659 7.8 HIGH xhci: handle isoc Babble and Buffer Overrun events properly
CVE-2024-26656 7.8 HIGH drm/amdgpu: fix use-after-free bug
CVE-2024-26663 7.8 HIGH tipc: Check the bearer type before calling tipc_udp_nl_bearer_add()
CVE-2024-26664 7.8 HIGH hwmon: (coretemp) Fix out-of-bounds memory access
CVE-2024-26666 7.1 HIGH wifi: mac80211: fix RCU use in TDLS fast-xmit
CVE-2024-26660 7.0 HIGH drm/amd/display: Implement bounds check for stream encoder creation in DCN301
CVE-2024-26673 netfilter: nft_ct: sanitize layer 3 and 4 protocol number in custom expectations
CVE-2023-52633 um: time-travel: fix time corruption
CVE-2024-26674 x86/lib: Revert to _ASM_EXTABLE_UA() for {get,put}_user() fixups
CVE-2024-26675 ppp_async: limit MRU to 64K
CVE-2024-26676 af_unix: Call kfree_skb() for dead unix_(sk)->oob_skb in GC.
CVE-2024-26677 rxrpc: Fix delayed ACKs to not set the reference serial number
CVE-2024-26678 x86/efistub: Use 1:1 file:memory mapping for PE/COFF .compat section
CVE-2024-26679 inet: read sk->sk_family once in inet_recv_error()
CVE-2024-26680 net: atlantic: Fix DMA mapping for PTP hwts ring
CVE-2024-26681 netdevsim: avoid potential loop in nsim_dev_trap_report_work()
CVE-2024-26682 wifi: mac80211: improve CSA/ECSA connection refusal
CVE-2024-26683 wifi: cfg80211: detect stuck ECSA element in probe resp

Showing top 20 of 35 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2023-52635

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