CVE-2026-98091
Linux kernel: use-after-free
- Risk score
- 43/100
- CVSS
- 5.5 v3.1
- Exploit chance (30 days)
- 0.1%
- Published
- 25 Sep 2026
Open in the live forecast Today's forecast
What to know
- What it is
- In the Linux kernel, the following vulnerability has been resolved: btrfs: detach failed sprout device from transaction update list When creating the first metadata chunk for a sprout filesystem, create_chunk() adds the new device to the transaction dev_update_list through device->post_commit_list. If the subsequent s…
- Affected
- Linux kernel
- Fix
- Apply the vendor's security update; see the linked advisory.
- Exploitation
- No known exploitation
Story map
At a glance
Linux kernel: Amber, patch this week. In the Linux kernel, the following vulnerability has been resolved: sctp: fix a TOCTOU race in SCTP_CMD_TIMER_START The SCTP_CMD_TIMER_START handler checks timer_pending() before calling timer_reduce(). The timer can expire and detach between these operations, causing timer_reduce() to rearm the timer without taking t…
The flaws
- CVE-2026-98091: Use-after-free (CVSS 5.5 · EPSS 0%)
- CVE-2026-98130: Race condition (CVSS 8.1 · EPSS 0%)
- CVE-2026-98115: Race condition (CVSS 8.8 · EPSS 0%)
- CVE-2026-98052: In the Linux kernel, the following vulnerability has been resolved: net: bcmasp: clear txcb->last… (CVSS 7.8 · EPSS 0%)
The fix
Fix: Apply the vendor's security update; see the linked advisory.
Who is exposed: Linux kernel
Where it stands
- No known exploitation
Connects to
- Same weakness: Use-after-free (CWE-416). 399 other warnings in 30 days
- Same product: Earlier Linux kernel warnings. 61 in the last 90 days
Why it is Yellow
- CVSS 5.5 medium
- On your watchlist: linux kernel
References
- https://git.kernel.org/stable/c/0ea6814bc0ff7cff443241bd34db9f0f828f3190
- https://git.kernel.org/stable/c/2a57fb1d5ce8f316b81bbb60e6df245ebc816ffc
- https://git.kernel.org/stable/c/63bfa52eb3289517aa82cb90e1189385873aae21
- https://git.kernel.org/stable/c/7fe9dfbca43464baa8f050447a4837587b18adec
- https://git.kernel.org/stable/c/86eff3052054e8f3b059b2d5845b6dcca021f20c
- https://git.kernel.org/stable/c/8b001df2b37ca022f710f3254fbb0bcd6d9e1bed
- https://git.kernel.org/stable/c/c93b3c43df561cd9f592cee20ae058b563f9e5b6
- https://git.kernel.org/stable/c/e9e7e37afa85db770e6084360b21a21a8b3a583f
Original description
In the Linux kernel, the following vulnerability has been resolved: btrfs: detach failed sprout device from transaction update list When creating the first metadata chunk for a sprout filesystem, create_chunk() adds the new device to the transaction dev_update_list through device->post_commit_list. If the subsequent system chunk creation fails, btrfs_init_new_device() aborts the transaction and releases the device while post_commit_list is still linked. This triggers a warning in btrfs_free_device() and leaves the transaction list referencing freed memory. Detach the device while holding chunk_mutex before releasing it.
Last activity 25 Sep 2026. Patch Forecast updates every hour.