CVE-2024-26685— nilfs2: fix potential bug in end_buffer_async_write
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I. Basic Information for CVE-2024-26685
Vulnerability Information
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Vulnerability Title
nilfs2: fix potential bug in end_buffer_async_write
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix potential bug in end_buffer_async_write According to a syzbot report, end_buffer_async_write(), which handles the completion of block device writes, may detect abnormal condition of the buffer async_write flag and cause a BUG_ON failure when using nilfs2. Nilfs2 itself does not use end_buffer_async_write(). But, the async_write flag is now used as a marker by commit 7f42ec394156 ("nilfs2: fix issue with race condition of competition between segments for dirty blocks") as a means of resolving double list insertion of dirty blocks in nilfs_lookup_dirty_data_buffers() and nilfs_lookup_node_buffers() and the resulting crash. This modification is safe as long as it is used for file data and b-tree node blocks where the page caches are independent. However, it was irrelevant and redundant to also introduce async_write for segment summary and super root blocks that share buffers with the backing device. This led to the possibility that the BUG_ON check in end_buffer_async_write would fail as described above, if independent writebacks of the backing device occurred in parallel. The use of async_write for segment summary buffers has already been removed in a previous change. Fix this issue by removing the manipulation of the async_write flag for the remaining super root block buffer.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
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，该漏洞源于缓冲区存在错误。
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
II. Public POCs for CVE-2024-26685
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Same Patch Batch · Linux · 2024-04-03 · 94 CVEs total
| CVE-2024-26744 | RDMA/srpt: Support specifying the srpt_service_guid parameter | |
| CVE-2024-26741 | dccp/tcp: Unhash sk from ehash for tb2 alloc failure after check_estalblished(). | |
| CVE-2024-26739 | net/sched: act_mirred: don't override retval if we already lost the skb | |
| CVE-2024-26735 | ipv6: sr: fix possible use-after-free and null-ptr-deref | |
| CVE-2024-26734 | devlink: fix possible use-after-free and memory leaks in devlink_init() | |
| CVE-2024-26733 | arp: Prevent overflow in arp_req_get(). | |
| CVE-2024-26732 | net: implement lockless setsockopt(SO_PEEK_OFF) | |
| CVE-2024-26731 | bpf, sockmap: Fix NULL pointer dereference in sk_psock_verdict_data_ready() | |
| CVE-2024-26736 | afs: Increase buffer size in afs_update_volume_status() | |
| CVE-2024-26743 | RDMA/qedr: Fix qedr_create_user_qp error flow | |
| CVE-2024-26742 | scsi: smartpqi: Fix disable_managed_interrupts | |
| CVE-2024-26747 | usb: roles: fix NULL pointer issue when put module's reference | |
| CVE-2024-26748 | usb: cdns3: fix memory double free when handle zero packet | |
| CVE-2024-26749 | usb: cdns3: fixed memory use after free at cdns3_gadget_ep_disable() | |
| CVE-2024-26751 | ARM: ep93xx: Add terminator to gpiod_lookup_table | |
| CVE-2024-26752 | l2tp: pass correct message length to ip6_append_data | |
| CVE-2024-26753 | crypto: virtio/akcipher - Fix stack overflow on memcpy | |
| CVE-2024-26754 | gtp: fix use-after-free and null-ptr-deref in gtp_genl_dump_pdp() | |
| CVE-2024-26755 | md: Don't suspend the array for interrupted reshape | |
| CVE-2024-26756 | md: Don't register sync_thread for reshape directly |
Showing top 20 of 94 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
Same vendor: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
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