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CVE-2024-26774— ext4: avoid dividing by 0 in mb_update_avg_fragment_size() when block bitmap corrupt

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，该漏洞源于除零错误。

AI Predicted 6.5 Difficulty: Moderate EPSS 0.24% · P15

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux 83e80a6e3543f37f74c8e48a5f305b054b65ce2a< 8b40eb2e716b503f7a4e1090815a17b1341b2150 affected
83e80a6e3543f37f74c8e48a5f305b054b65ce2a< f32d2a745b02123258026e105a008f474f896d6a affected
83e80a6e3543f37f74c8e48a5f305b054b65ce2a< 8cf9cc602cfb40085967c0d140e32691c8b71cf3 affected
83e80a6e3543f37f74c8e48a5f305b054b65ce2a< 993bf0f4c393b3667830918f9247438a8f6fdb5b affected
398a0fdb38d9ab5e68023667cc5e6e3d109e2d6b affected
5.19.12< 5.20 affected
6.0 affected
< 6.0 unaffected
… +4 more rows
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I. Basic Information for CVE-2024-26774

Vulnerability Information
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Vulnerability Title
ext4: avoid dividing by 0 in mb_update_avg_fragment_size() when block bitmap corrupt
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ext4: avoid dividing by 0 in mb_update_avg_fragment_size() when block bitmap corrupt Determine if bb_fragments is 0 instead of determining bb_free to eliminate the risk of dividing by zero when the block bitmap is corrupted.
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，该漏洞源于除零错误。
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 83e80a6e3543f37f74c8e48a5f305b054b65ce2a ~ 8b40eb2e716b503f7a4e1090815a17b1341b2150 -
Linux Linux 6.0 -

II. Public POCs for CVE-2024-26774

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III. Intelligence Information for CVE-2024-26774

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Other References for CVE-2024-26774 (5)

Same Patch Batch · Linux · 2024-04-03 · 94 CVEs total

CVE-2024-26760 9.8 CRITICAL scsi: target: pscsi: Fix bio_put() for error case
CVE-2024-26779 8.8 HIGH wifi: mac80211: fix race condition on enabling fast-xmit
CVE-2024-26689 8.8 HIGH ceph: prevent use-after-free in encode_cap_msg()
CVE-2024-26692 8.3 HIGH smb: Fix regression in writes when non-standard maximum write size negotiated
CVE-2024-26736 8.1 HIGH afs: Increase buffer size in afs_update_volume_status()
CVE-2023-52637 7.8 HIGH can: j1939: Fix UAF in j1939_sk_match_filter during setsockopt(SO_J1939_FILTER)
CVE-2024-26728 7.8 HIGH drm/amd/display: fix null-pointer dereference on edid reading
CVE-2024-26748 7.8 HIGH usb: cdns3: fix memory double free when handle zero packet
CVE-2024-26739 7.8 HIGH net/sched: act_mirred: don't override retval if we already lost the skb
CVE-2024-26718 7.8 HIGH dm-crypt, dm-verity: disable tasklets
CVE-2024-26712 7.8 HIGH powerpc/kasan: Fix addr error caused by page alignment
CVE-2024-26737 7.8 HIGH bpf: Fix racing between bpf_timer_cancel_and_free and bpf_timer_cancel
CVE-2024-26759 7.8 HIGH mm/swap: fix race when skipping swapcache
CVE-2024-26762 7.8 HIGH cxl/pci: Skip to handle RAS errors if CXL.mem device is detached
CVE-2024-26706 7.8 HIGH parisc: Fix random data corruption from exception handler
CVE-2024-26704 7.8 HIGH ext4: fix double-free of blocks due to wrong extents moved_len
CVE-2024-26766 7.8 HIGH IB/hfi1: Fix sdma.h tx->num_descs off-by-one error
CVE-2024-26773 7.8 HIGH ext4: avoid allocating blocks from corrupted group in ext4_mb_try_best_found()
CVE-2024-26699 7.8 HIGH drm/amd/display: Fix array-index-out-of-bounds in dcn35_clkmgr
CVE-2024-26697 7.8 HIGH nilfs2: fix data corruption in dsync block recovery for small block sizes

Showing top 20 of 94 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-26774

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