Skip to content
CVE Ledger
  • Newest CVEsPage
  • Recently added to KEVPage
  • Rising exploitation (EPSS)Page
  • Weekly digestPage
  • StatisticsPage
  • WatchlistPage
  • API docsPage
  • MCP serverPage
  • AboutPage
  • Data sourcesPage
  • Data statusPage
  • ChangelogPage
  • How it's builtPage
  • Support the projectPage

14 results

Back

CVE-2026-99103workqueue: Fix unbound pool lifetime for pending pwqs

Description

In the Linux kernel, the following vulnerability has been resolved: workqueue: Fix unbound pool lifetime for pending pwqs KASAN reports a use-after-free of an unbound worker_pool in node_activate_pending_pwq(): BUG: KASAN: slab-use-after-free in _raw_spin_trylock+0x6d/0x120 Read of size 4 at addr ffff8880089ce000 by task kworker/u22:0/318 CPU: 1 UID: 0 PID: 318 Comm: kworker/u22:0 Not tainted 7.2.0 #1 PREEMPT(lazy) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014 Workqueue: 0x0 (flush-8:0) Call Trace: <TASK> dump_stack_lvl+0x53/0x70 print_report+0xce/0x610 kasan_report+0xce/0x100 _raw_spin_trylock+0x6d/0x120 pwq_dec_nr_in_flight+0x4b4/0xcb0 process_one_work+0x921/0x11a0 worker_thread+0x4d0/0xd20 kthread+0x2de/0x3c0 ret_from_fork+0x3aa/0x620 ret_from_fork_asm+0x1a/0x30 </TASK> Allocated by task 311: alloc_pwq+0x439/0xca0 apply_wqattrs_prepare+0x75e/0xd10 apply_workqueue_attrs_locked+0x44/0xa0 wq_nice_store+0x350/0x450 Freed by task 0: kfree+0x127/0x3b0 rcu_core+0x523/0x1780 handle_softirqs+0x1b3/0x610 Last potentially related work creation: put_unbound_pool+0x3f3/0x7d0 pwq_release_workfn+0x494/0x8e0 kthread_worker_fn+0x1ff/0x790 Canceling the last inactive work skips pwq_dec_nr_active(), so an empty pwq can remain on pending_pwqs when its refcnt reaches zero. pwq_release_workfn() currently puts the pool before removing that pwq. If this drops the last pool reference, the pool can be RCU-freed while the pwq remains reachable, and node_activate_pending_pwq() may trylock the freed pool->lock. Remove the pwq from pending_pwqs before putting the pool.

Timeline

  1. ID reserved

    By Linux

  2. · 33 days later

    Published

  3. · 2 days later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.

EPSS (exploitation in 30 days)
0.17% · top 93% of all CVEs (14 Nov 2026)
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.

Affected products

  • Linux · Linux

    • affected 5a70baec2294e8a7d0fcc4558741c23e752dad5c – < 6741dd3fd38e47c08bc39d11ef5fa141fa6d0441
    • affected 843288afd3cc6f3342659c6cf81fc47684d25563 – < 9f5d5aef3072a33c6f9bfb954bb0cba1c2541849
    • affected 5797b1c18919cd9c289ded7954383e499f729ce0 – < 390b9542fe670b8936738140ef9f349df6adeab6
    • affected 5797b1c18919cd9c289ded7954383e499f729ce0 – < f320b85c90fe5fc9d4d06badd450518323a94a7f
    • affected 5797b1c18919cd9c289ded7954383e499f729ce0 – < 3d2ef2b9f4c084ab498494d26495a82f7e15407b
    • affected 5797b1c18919cd9c289ded7954383e499f729ce0 – < cf9c8aaea0d47410df8708bec195889f3a85cd3c
    • affected fc67aebe34f22632ccb22faea48cc4d3134620a2
    • affected 6.6.23 – < 6.6.25
    • affected 6.8.2 – < 6.8.4
    • affected 6.7.11 – < 6.8

  • Linux · Linux

    • affected 6.9
    • unaffected < 6.9
    • unaffected 6.6.25 – ≤ 6.6.*
    • unaffected 6.8.4 – ≤ 6.8.*
    • unaffected 6.12.115 – ≤ 6.12.*
    • unaffected 6.18.59 – ≤ 6.18.*
    • unaffected 7.2.13 – ≤ 7.2.*
    • unaffected 7.3 – ≤ *

References

References6

Sources

The same CVE in the primary databases and aggregators, to check against.

Badge for a README or a ticket

CVE-2026-99103 badge
[![CVE-2026-99103](https://cveledger.app/badge/CVE-2026-99103.svg)](https://cveledger.app/cve/CVE-2026-99103)

Record last updated .