CVE-2026-23111: Privilege escalation or denial of service in nf_tables via inverted element activity check
Not in the CISA KEV catalog.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
CVE-2026-23111 key facts
- CISA KEV
- Not listed (catalog checked )
- Highest advisory severity
- High
- CVSS base score
- 7.8 (Red Hat)
- Weakness
- CWE-672
- Fixed releases
- Red Hat: RHSA-2026:9112
- Vendor advisories
- 2 from Red Hat
- VulniPulse record
- Published · Updated
Scores, vectors, weaknesses and fixed releases are quoted from vendor advisories that cover only CVE-2026-23111; bulletin-wide values are not repeated here.
Is CVE-2026-23111 exploited?
No exploitation is reported in the sources VulniPulse tracks: CVE-2026-23111 is not in the CISA KEV catalog (checked ) and no tracked advisory for it reports exploitation. That is not proof the vulnerability cannot be exploited.
How do I fix CVE-2026-23111?
Upgrade to a fixed release named by the vendor:
- Red Hat: RHSA-2026:9112
- Update the affected package(s) to the fixed version shipped in RHSA-2026:9112 (`sudo dnf update` / `yum update`). (Red Hat)
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Vendor advisory comparison
Red Hat
2 advisories- Advisory severityHigh7.8
High [CVE-2026-23111] Privilege escalation or denial of service in nf_tables via inverted element activity check
CVE-2026-23111Source published
Privilege escalation or denial of service in nf_tables via inverted element activity check. Red Hat rates this important (CVSS 7.8). Weakness: CWE-672. Affected package(s): kernel. Resolved in Red Hat advisory RHSA-2026:9112 — update the affected packages (`sudo dnf update`).
- Affected products in this advisory
- Red Hat Enterprise Linux AppStream EUS (v. 10.0)
- Red Hat Enterprise Linux AppStream (v. 10)
- Red Hat Enterprise Linux AppStream EUS (v.9.4)
- Red Hat Enterprise Linux AppStream EUS (v.9.6)
24 more entries in the full advisory.
- Source-reported affected versions
- kernel-0:6.12.0-55.70.1.el10_0
- kernel-0:5.14.0-570.108.1.el9_6
- kernel-0:6.12.0-211.7.1.el10_2
- kernel-0:5.14.0-427.121.1.el9_4
1 more entries in the full advisory.
- Source-reported fixed versions
- RHSA-2026:9112
- Mitigation guidance
- Update the affected package(s) to the fixed version shipped in RHSA-2026:9112 (`sudo dnf update` / `yum update`).
- Advisory severityUnrated
Advisory [CVE-2024-56581 +7] Kernel Live Patch Security Notice
LSN-0119-1Source published
This bulletin covers 8 CVEs. The products, versions, score and guidance below describe the bulletin; check its source for applicability to this specific CVE.
In the Linux kernel, the following vulnerability has been resolved: btrfs: ref-verify: fix use-after-free after invalid ref action At btrfs_ref_tree_mod() after we successfully inserted the new ref entry (local variable 'ref') into the respective block entry's rbtree (local variable 'be'), if we find an unexpected action of BTRFS_DROP_DELAYED_REF, we error out and free the ref entry without removing it from the block entry's rbtree. In the Linux kernel, the following vulnerability has been resolved: wifi: brcmfmac: Fix oops due to NULL pointer dereference in brcmf_sdiod_sglist_rw() This patch fixes a NULL pointer dereference bug in brcmfmac that occurs when a high 'sd_sgentry_align' value applies (e.g. 512) and a lot of queued SKBs are sent from the pkt queue. In the Linux kernel, the…
- Related products — impact not confirmed
- Ubuntu 25.10
- Ubuntu 24.04
- Ubuntu 22.04
- Ubuntu 20.04
3 more entries in the full advisory.
- Source-reported affected versions
- Ubuntu 25.10
- Ubuntu 24.04
- Ubuntu 22.04
- Ubuntu 20.04
2 more entries in the full advisory.
- Source-reported fixed versions
- No fixed-version detail extracted. This does not mean no fix exists.
- Mitigation guidance
- Apply available updates: `sudo apt update && sudo apt upgrade` (a standard system update installs the fix).
More Red Hat advisories
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- CVE-2026-34486Apr 9, 2026Missing Encryption of Sensitive Data due to EncryptInterceptor bypass
- CVE-2026-53362Jul 4, 2026account for fraggap on the paged allocation path
- CVE-2025-31277Mar 18, 2026Processing maliciously crafted web content may lead to memory corruption
- CVE-2026-123158Nov 5, 2026Password authentication bypass via password hash misinterpretation
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