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CVE-2026-98388— exec: do_close_on_exec() before taking exec_update_lock

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.

在 Linux 内核中，已修复以下漏洞： exec：在获取 之前执行 目前， 是在持有 锁的情况下执行的。该锁被广泛用于多处访问进程状态以同步访问检查的场景。我最近新增了另一处使用 的代码，导致了回归问题。 可能会阻塞，等待来自文件系统的响应。这意味着一个挂起的文件系统可能会阻塞那些使用 的代码路径；同时，这也意味着一个试图检查调用进程状态的 FUSE 文件系统可能会发生死锁。 为避免此类问题，将 的执行时机移至获取 之前，但需确保在必要时在文件描述符表被复制之后执行。 我检查了 调用新旧位置之间的所有代码路径，发

AI Predicted 7.5 Difficulty: Moderate

Affected Version Matrix 26

VendorProduct Version RangeStatus
Linux Linux ae1e630bcaac739f625822078edbaea98366930d< 955973fff4a36d39a848b00cac1706863f568fe1 affected
d54f14655fd7d7b293698a8b6918563c4c0465e7< 550feab5b01000ab314868b62211fb3ddfd600e8 affected
bb43679356f1f2a4c6b1c88aec4f021e5b5c74e9< 5aacc19ba2b1faf84c4a2f2cf9a1784e03d1ff38 affected
7456ae990a9738962b33146916fabca62ae3d4e0< 3feb4020bfb7ccf0d347f27051639d25e19cd65d affected
4bfe8c481846cee52473a2f7d7b30ee8e6749fc4< 0d86cd6b709c39216e6ee5ea8f0fc4242bbb2b53 affected
f9b4b03ccc9c69bf7f7298d4559906ebea7143b3< 19ddef61ee0a49782a60f8f497e50597ad5de2da affected
6650527444dadc63d84aa939d14ecba4fadb2f69< 63be3d8511bdafa095cd14a393cbf3c58dbbb928 affected
6650527444dadc63d84aa939d14ecba4fadb2f69< e780259b54e618ceb4763fbc21314acf3565e813 affected
… +18 more rows
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I. Basic Information for CVE-2026-98388

Vulnerability Information
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Vulnerability Title
exec: do_close_on_exec() before taking exec_update_lock
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: exec: do_close_on_exec() before taking exec_update_lock do_close_on_exec() currently happens while holding the exec_update_lock, which is used in a lot of places that access process state to synchronize access checks. I recently added another such use of exec_update_lock, causing a regression. do_close_on_exec() can block waiting for a reply from a filesystem. That means a hung filesystem can block codepaths that use exec_update_lock; and it also means that a FUSE filesystem which attempts to inspect the calling process can deadlock. To avoid such problems, move do_close_on_exec() before the exec_update_lock is taken, but after the FD table has been copied if necessary. I have looked through all the calls between the old and new position of the do_close_on_exec() call; there seems to be no file descriptor table access in between.
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

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux ae1e630bcaac739f625822078edbaea98366930d ~ 955973fff4a36d39a848b00cac1706863f568fe1 -
Linux Linux 7.2 -

II. Public POCs for CVE-2026-98388

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III. Intelligence Information for CVE-2026-98388

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Other References for CVE-2026-98388 (8)

Same Patch Batch · Linux · 2026-10-14 · 46 CVEs total

CVE-2026-98399 s390/ipl: Fix NULL deref in dump_reipl without re-IPL parm block
CVE-2026-98395 powerpc/entry: Fix irq_soft_mask corruption on replayed interrupt exit
CVE-2026-98394 af_unix: Return immediately when manage_oob() returns NULL for 0-length buffer.
CVE-2026-98390 x86/amd_node: Avoid divide by zero on virtualized systems
CVE-2026-98391 drm/xe: Guard page-fault worker with runtime PM check
CVE-2026-98389 drm/amdgpu: skip gfx switch_power_profile during GPU reset
CVE-2026-98387 s390/crypto: Fix skcipher_walk return code handling in aes_s390
CVE-2026-98386 scsi: qla2xxx: Use memset_io() to clear QLAFX00 request ring slot
CVE-2026-98392 Bluetooth: btintel_pcie: fix tx_handle bounds off-by-one
CVE-2026-98398 locking/lockdep: Invalidate stale class_cache entries for zapped classes
CVE-2026-98397 platform/x86: x86-android-tablets: hold device reference for secondary fwnode teardown
CVE-2026-98400 s390/ipl: Fix NULL deref in kdump without re-IPL parm block
CVE-2026-98402 net: icmp: avoid invalid transport header access in icmp_send tracepoint
CVE-2026-98401 net: iptunnel: fix stale transport header during tunnel decapsulation
CVE-2026-98403 s390/boot: Avoid IPL parameter append past command line
CVE-2026-98404 drm/virtio: Fix a NULL vs ERR_PTR() bug in virtio_gpu_user_framebuffer_create()
CVE-2026-98405 smb: client: fix missing iov bounds check in parse_posix_sids()
CVE-2026-98406 wifi: mac80211: avoid WARN in set_bitrate_mask when sdata not in driver
CVE-2026-98408 watchdog: rzv2h: Avoid division by zero
CVE-2026-98407 wifi: rsi: fix heap OOB write on key removal

Showing top 20 of 46 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-98388

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