Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2024-26630— mm: cachestat: fix folio read-after-free in cache walk

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cachestat存在释放后重用漏洞。

CVSS 7.1 · High EPSS 0.30% · P21

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 8

VendorProduct Version RangeStatus
Linux Linux cf264e1329fb0307e044f7675849f9f38b44c11a< ba60fdf75e89ea762bb617be578dc47f27655117 affected
cf264e1329fb0307e044f7675849f9f38b44c11a< fe7e008e0ce728252e4ec652cceebcc62211657c affected
cf264e1329fb0307e044f7675849f9f38b44c11a< 3a75cb05d53f4a6823a32deb078de1366954a804 affected
6.5 affected
< 6.5 unaffected
6.6.21≤ 6.6.* unaffected
6.7.9≤ 6.7.* unaffected
6.8≤ * unaffected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2024-26630

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
mm: cachestat: fix folio read-after-free in cache walk
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: mm: cachestat: fix folio read-after-free in cache walk In cachestat, we access the folio from the page cache's xarray to compute its page offset, and check for its dirty and writeback flags. However, we do not hold a reference to the folio before performing these actions, which means the folio can concurrently be released and reused as another folio/page/slab. Get around this altogether by just using xarray's existing machinery for the folio page offsets and dirty/writeback states. This changes behavior for tmpfs files to now always report zeroes in their dirty and writeback counters. This is okay as tmpfs doesn't follow conventional writeback cache behavior: its pages get "cleaned" during swapout, after which they're no longer resident etc.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
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cachestat存在释放后重用漏洞。
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 cf264e1329fb0307e044f7675849f9f38b44c11a ~ ba60fdf75e89ea762bb617be578dc47f27655117 -
Linux Linux 6.5 -

II. Public POCs for CVE-2024-26630

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2024-26630

请登录查看更多情报信息。

Other References for CVE-2024-26630 (3)

Same Patch Batch · Linux · 2024-03-13 · 3 CVEs total

CVE-2023-52608 firmware: arm_scmi: Check mailbox/SMT channel for consistency
CVE-2024-26629 nfsd: fix RELEASE_LOCKOWNER

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-26630

No comments yet

Leave a comment