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CVE-2024-44968— tick/broadcast: Move per CPU pointer access into the atomic section

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tick/broadcast组件存在不当访问问题。

AI Predicted 5.5 Difficulty: Hard EPSS 0.22% · P12

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 11

VendorProduct Version RangeStatus
Linux Linux dfe19aa91378972f10530635ad83b2d77f481044< f54abf332a2bc0413cfa8bd6a8511f7aa99faea0 affected
457a1c87d454455d671a3045cf0b56157be110a1< f91fb47ecacc178a83a77eeebd25cbaec18c01d6 affected
9ef7190228145f959d9bc0ddca40ecf76bb413b0< 668c6c4a7e9e9f081c06b70f30104fb7013437ed affected
d3b165c10473aa6fc6141bb5b1f6e5b50c1fb774< 541a900d245536d4809cb1aa322c3fcc2cdb58a6 affected
408bfb6b0a7f22e971ce6b600aec448769e580a8< 7b3ec186ba93e333e9efe7254e7e31c1828e5d2d affected
3a58c590f6bd1d20eb1e76c5cea31c36cc032339< b9d604933d5fd72dd37f24e1dc35f778297d745a affected
2cdab4b4bf77369961f706cdeb7d040db10c5217< 7dd12f85f150010ef7518201c63fa7e395f5c3e9 affected
f7d43dd206e7e18c182f200e67a8db8c209907fa< 6881e75237a84093d0986f56223db3724619f26e affected
… +3 more rows
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I. Basic Information for CVE-2024-44968

Vulnerability Information
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Vulnerability Title
tick/broadcast: Move per CPU pointer access into the atomic section
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: tick/broadcast: Move per CPU pointer access into the atomic section The recent fix for making the take over of the broadcast timer more reliable retrieves a per CPU pointer in preemptible context. This went unnoticed as compilers hoist the access into the non-preemptible region where the pointer is actually used. But of course it's valid that the compiler keeps it at the place where the code puts it which rightfully triggers: BUG: using smp_processor_id() in preemptible [00000000] code: caller is hotplug_cpu__broadcast_tick_pull+0x1c/0xc0 Move it to the actual usage site which is in a non-preemptible region.
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tick/broadcast组件存在不当访问问题。
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)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux dfe19aa91378972f10530635ad83b2d77f481044 ~ f54abf332a2bc0413cfa8bd6a8511f7aa99faea0 -
Linux Linux 6.1.103 ~ 6.1.105 -

II. Public POCs for CVE-2024-44968

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III. Intelligence Information for CVE-2024-44968

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Patches & Fixes for CVE-2024-44968 (1)

Same Patch Batch · Linux · 2024-09-04 · 58 CVEs total

CVE-2024-44984 10.0 CRITICAL bnxt_en: Fix double DMA unmapping for XDP_REDIRECT
CVE-2024-44985 9.8 CRITICAL ipv6: prevent possible UAF in ip6_xmit()
CVE-2024-44970 9.8 CRITICAL net/mlx5e: SHAMPO, Fix invalid WQ linked list unlink
CVE-2024-44998 9.8 CRITICAL atm: idt77252: prevent use after free in dequeue_rx()
CVE-2024-44994 8.8 HIGH iommu: Restore lost return in iommu_report_device_fault()
CVE-2024-44988 8.8 HIGH net: dsa: mv88e6xxx: Fix out-of-bound access
CVE-2024-44986 8.1 HIGH ipv6: fix possible UAF in ip6_finish_output2()
CVE-2024-44973 8.1 HIGH mm, slub: do not call do_slab_free for kfence object
CVE-2024-44995 7.8 HIGH net: hns3: fix a deadlock problem when config TC during resetting
CVE-2024-44974 7.8 HIGH mptcp: pm: avoid possible UaF when selecting endp
CVE-2024-44978 7.8 HIGH drm/xe: Free job before xe_exec_queue_put
CVE-2024-44967 7.8 HIGH drm/mgag200: Bind I2C lifetime to DRM device
CVE-2024-44997 7.8 HIGH net: ethernet: mtk_wed: fix use-after-free panic in mtk_wed_setup_tc_block_cb()
CVE-2024-44954 7.8 HIGH ALSA: line6: Fix racy access to midibuf
CVE-2024-44966 7.8 HIGH binfmt_flat: Fix corruption when not offsetting data start
CVE-2024-44951 7.8 HIGH serial: sc16is7xx: fix TX fifo corruption
CVE-2024-44959 7.8 HIGH tracefs: Use generic inode RCU for synchronizing freeing
CVE-2024-44987 7.8 HIGH ipv6: prevent UAF in ip6_send_skb()
CVE-2024-44949 7.8 HIGH parisc: fix a possible DMA corruption
CVE-2024-45000 7.8 HIGH fs/netfs/fscache_cookie: add missing "n_accesses" check

Showing top 20 of 58 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-44968

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