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CVE-2026-98862— audit: fix exe mark UAF in kill_rules()

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，以下漏洞已得到修复： audit：修复 kill_rules() 中 exe 标记的释放后使用（UAF）问题 kill_rules() 在修剪审计树时，会移除混合的 AUDIT_DIR 和 AUDIT_EXE 规则。该函数在将规则从 RCU 可见的过滤器列表中移除之前，会先释放 entry->rule.exe。 当通过 AUDIT_ADD_RULE 安装规则（该操作需要 CAP_AUDIT_CONTROL 权限）后，删除被监控的目录可能与另一个仍在评估该规则的任务发生竞态条件。在这种情况下，

AI Predicted 8.8 Difficulty: Moderate

Possible ATT&CK Techniques 2 AI

T1070.002 T1069.001 · Local Groups

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux 34d99af52ad40bd498ba66970579a5bc1fb1a3bc< 304960900991157e6883bdf0b39782b690545ee8 affected
34d99af52ad40bd498ba66970579a5bc1fb1a3bc< 88633025f20ba9c32ccdb3efc86eafdf98cb825c affected
34d99af52ad40bd498ba66970579a5bc1fb1a3bc< f2cc5462b78559c7628a9f8ac9a9592e7783183a affected
34d99af52ad40bd498ba66970579a5bc1fb1a3bc< aa650d87a498844060eecb1d336f4d46f4d1b0b3 affected
4.3 affected
< 4.3 unaffected
6.12.113≤ 6.12.* unaffected
6.18.56≤ 6.18.* unaffected
… +2 more rows
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I. Basic Information for CVE-2026-98862

Vulnerability Information
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Vulnerability Title
audit: fix exe mark UAF in kill_rules()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: audit: fix exe mark UAF in kill_rules() kill_rules() removes mixed AUDIT_DIR and AUDIT_EXE rules when an audit tree is pruned. It drops entry->rule.exe before removing the rule from the RCU-visible filter lists. After a rule has been installed with AUDIT_ADD_RULE, which requires CAP_AUDIT_CONTROL, removing the watched directory can race with another task that is still evaluating the rule. In that case, fsnotify can free the executable mark before the reader reaches audit_mark_compare(), causing a use-after-free. KASAN reports: BUG: KASAN: slab-use-after-free in audit_mark_compare+0x8d/0xa0 Unlink the published rules from the RCU-visible lists and retain them on tree->rules for cleanup. If any rule has an executable mark, wait for a single RCU grace period before removing the marks and scheduling the entries for freeing. Otherwise, call_rcu() already provides the required deferred freeing without a synchronous wait.
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 34d99af52ad40bd498ba66970579a5bc1fb1a3bc ~ 304960900991157e6883bdf0b39782b690545ee8 -
Linux Linux 4.3 -

II. Public POCs for CVE-2026-98862

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III. Intelligence Information for CVE-2026-98862

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Patches & Fixes for CVE-2026-98862 (3)

Same Patch Batch · Linux · 2026-10-18 · 436 CVEs total

CVE-2026-98582 nfc: st21nfca: validate received frame size
CVE-2026-98568 vxlan: use one headroom snapshot for neighbour replies
CVE-2026-98570 net: ipv6: keep room for the mac header in dst_dev_overhead()
CVE-2026-98571 net: stmmac: clear stale buf->page after recycling on skb build failure
CVE-2026-98572 bpf: Fix immediate JMP JEQ/JNE on MIPS32
CVE-2026-98573 net: skbuff: fix pull-bound underflow in skb_checksum_setup_ipv6()
CVE-2026-98574 net: bcmgenet: stop Tx NAPI before disabling the queues
CVE-2026-98575 nfc: pn533: fix OOB read in pn533_acr122_is_rx_frame_valid()
CVE-2026-98576 nfc: llcp: fix slab-out-of-bounds reads when logging service names
CVE-2026-98577 nfc: llcp: fix WKS SAP hijacking via prefix match in nfc_llcp_wks_sap()
CVE-2026-98578 nfc: st21nfca: validate ISO15693 inventory length
CVE-2026-98579 nfc: llcp: fix sdreq TLV list leak on parse/alloc/send failure
CVE-2026-98580 nfc: llcp: Fix race condition in accept_queue lifecycle
CVE-2026-98581 nfc: llcp: Fix list corruption / refcount desync in nfc_llcp_recv_dm()
CVE-2026-98593 s390/debug: Fix NULL pointer dereference in debug_info_copy()
CVE-2026-98590 bpf: Fix bpf_sock context code generation
CVE-2026-98591 bpf: Fix bounds check for skb-backed dynptrs
CVE-2026-98592 net: spacemit: clear TX descriptor on fragment mapping failure
CVE-2026-98589 bpf: Reject pkt arguments in mutating subprogs
CVE-2026-98594 tg3: clean up PHYLIB resources on probe failure

Showing top 20 of 436 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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