CVE-2024-36966: Linux vulnerability

CVE-2024-36966: erofs: reliably distinguish block based and fscache mode

In the Linux kernel, the following vulnerability has been resolved: erofs: reliably distinguish block based and fscache mode When erofs_kill_sb() is called in block dev based mode, s_bdev may not have been initialised yet, and if CONFIG_EROFS_FS_ONDEMAND is enabled, it will be mistaken for fscache mode, and then attempt to free an anon_dev that has never been allocated, triggering the following warning: ============================================ ida_free called for id=0 which is not allocated. WARNING: CPU: 14 PID: 926 at lib/idr.c:525 ida_free+0x134/0x140 Modules linked in: CPU: 14 PID: 926 Comm: mount Not tainted 6.9.0-rc3-dirty #630 RIP: 0010:ida_free+0x134/0x140 Call Trace: <TASK> erofs_kill_sb+0x81/0x90 deactivate_locked_super+0x35/0x80 get_tree_bdev+0x136/0x1e0 vfs_get_tree+0x2c/0xf0 do_new_mount+0x190/0x2f0 [...] ============================================ Now when erofs_kill_sb() is called, erofs_sb_info must have been initialised, so use sbi->fsid to distinguish between the two modes.

UnknownCVSS not scoredNot KEV-listedUpdatedMay 11, 2026, 20:18 UTC (UTC+00:00)

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Jun 8, 2024, 12:52 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

3Timeline events

2ADP providers

4Source links

SSVC decision data

Timestamp: Jun 12, 2024, 19:01 UTC (UTC+00:00)
Version: 2.0.3

Exploitation: noneAutomatable: noTechnical Impact: partial

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
May 30, 2024, 15:25 UTC (UTC+00:00)
CVE publishedCVE Program
The CVE record was published.
Jun 8, 2024, 12:52 UTC (UTC+00:00)
CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
May 11, 2026, 20:18 UTC (UTC+00:00)

ADP provider summaries

other:ssvc

Source materials

CVE List V5 sourceCVE List V5
https://git.kernel.org/stable/c/f9b877a7ee312ec8ce17598a7ef85cb820d7c371CVE reference, Linux
https://git.kernel.org/stable/c/dcdd49701e429c55b3644fd70fc58d85745f8cfeCVE reference, Linux
https://git.kernel.org/stable/c/7af2ae1b1531feab5d38ec9c8f472dc6cceb4606CVE reference, Linux

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

LinuxLinuxaca740cecbe57b12bd9c1fc632092af5ebacda0c, aca740cecbe57b12bd9c1fc632092af5ebacda0c, aca740cecbe57b12bd9c1fc632092af5ebacda0cunaffected

LinuxLinux6.6, 0, 6.6.32, 6.8.11, 6.9affected

Weakness

CWE details

No CWE listed

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