CVE-2023-52604High· 7.8▾ TwilightIn the Linux kernel, the following vulnerability has been resolved: FS:JFS:UBSAN:array-index-out-of-bounds in dbAdjTree Syzkaller reported the following issue: UBSAN: array-index-out-of-bounds in fs/jfs/jfs_dmap.c:2867:6 index 196694 …
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 42.9 · likelihood 0 · exploitation 0
Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.
Exploit-prediction probability, daily snapshots since Aug 5.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
0.2%
In the Linux kernel, the following vulnerability has been resolved:
FS:JFS:UBSAN:array-index-out-of-bounds in dbAdjTree
Syzkaller reported the following issue:
Kernel panic - not syncing: UBSAN: panic_on_warn set ... CPU: 1 PID: 109 Comm: jfsCommit Not tainted 6.6.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 panic+0x30f/0x770 kernel/panic.c:340 check_panic_on_warn+0x82/0xa0 kernel/panic.c:236 ubsan_epilogue lib/ubsan.c:223 [inline] __ubsan_handle_out_of_bounds+0x13c/0x150 lib/ubsan.c:348 dbAdjTree+0x474/0x4f0 fs/jfs/jfs_dmap.c:2867 dbJoin+0x210/0x2d0 fs/jfs/jfs_dmap.c:2834 dbFreeBits+0x4eb/0xda0 fs/jfs/jfs_dmap.c:2331 dbFreeDmap fs/jfs/jfs_dmap.c:2080 [inline] dbFree+0x343/0x650 fs/jfs/jfs_dmap.c:402 txFreeMap+0x798/0xd50 fs/jfs/jfs_txnmgr.c:2534 txUpdateMap+0x342/0x9e0 txLazyCommit fs/jfs/jfs_txnmgr.c:2664 [inline] jfs_lazycommit+0x47a/0xb70 fs/jfs/jfs_txnmgr.c:2732 kthread+0x2d3/0x370 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 </TASK> Kernel Offset: disabled Rebooting in 86400 seconds..
The issue is caused when the value of lp becomes greater than CTLTREESIZE which is the max size of stree. Adding a simple check solves this issue.
Dave: As the function returns a void, good error handling would require a more intrusive code reorganization, so I modified Osama's patch at use WARN_ON_ONCE for lack of a cleaner option.
The patch is tested via syzbot.
linux_kernel < 4.19.307linux_kernel >= 4.20, < 5.4.269linux_kernel >= 5.5, < 5.10.210linux_kernel >= 5.11, < 5.15.149linux_kernel >= 5.16, < 6.1.77linux_kernel >= 6.2, < 6.6.16linux_kernel >= 6.7, < 6.7.4Upgrade past the affected range:
linux_kernel 6.7.4Connected by shared product, vendor, weakness, or advisory.
CVE-2023-2008High· 8.2A flaw was found in the Linux kernel's udmabuf device driver, within a fault handler
CVE-2021-46984High· 7.8In the Linux kernel, the following vulnerability has been resolved: kyber: fix out of bounds access when preempted __blk_mq_sched_bio_merge() gets the ctx and hctx for the current CPU and passes the hctx to ->bio_merge()
CVE-2026-31710Medium· 5.5In the Linux kernel, the following vulnerability has been resolved: smb: client: fix dir separator in SMB1 UNIX mounts When calling cifs_mount_get_tcon() with SMB1 UNIX mounts, @cifs_sb->mnt_cifs_flags needs to be read or updated only …
CVE-2023-4622High· 7.8A use-after-free vulnerability in the Linux kernel's af_unix component can be exploited to achieve local privilege escalation. The unix_stream_sendpage() function tries to add data to the last skb in the peer's recv queue without lock…
CVE-2022-24958High· 7.8drivers/usb/gadget/legacy/inode.c in the Linux kernel through 5.16.8 mishandles dev->buf release.
CVE-2023-4611High· 7.0A use-after-free flaw was found in mm/mempolicy.c in the memory management subsystem in the Linux Kernel