Use-After-Free in Linux kernel (CVE-2024-40907)
Summary
Vulnerability in Linux kernel (CVE-2024-40907). Successful exploitation can lead to full system takeover.
Original description
The description as published by the source.
In the Linux kernel, the following vulnerability has been resolved:
ionic: fix kernel panic in XDP_TX action
In the XDP_TX path, ionic driver sends a packet to the TX path with rx
page and corresponding dma address.
After tx is done, ionic_tx_clean() frees that page.
But RX ring buffer isn't reset to NULL.
So, it uses a freed page, which causes kernel panic.
BUG: unable to handle page fault for address: ffff8881576c110c
PGD 773801067 P4D 773801067 PUD 87f086067 PMD 87efca067 PTE 800ffffea893e060
Oops: Oops: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC KASAN NOPTI
CPU: 1 PID: 25 Comm: ksoftirqd/1 Not tainted 6.9.0+ #11
Hardware name: ASUS System Product Name/PRIME Z690-P D4, BIOS 0603 11/01/2021
RIP: 0010:bpf_prog_f0b8caeac1068a55_balancer_ingress+0x3b/0x44f
Code: 00 53 41 55 41 56 41 57 b8 01 00 00 00 48 8b 5f 08 4c 8b 77 00 4c 89 f7 48 83 c7 0e 48 39 d8
RSP: 0018:ffff888104e6fa28 EFLAGS: 00010283
RAX: 0000000000000002 RBX: ffff8881576c1140 RCX: 0000000000000002
RDX: ffffffffc0051f64 RSI: ffffc90002d33048 RDI: ffff8881576c110e
RBP: ffff888104e6fa88 R08: 0000000000000000 R09: ffffed1027a04a23
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8881b03a21a8
R13: ffff8881589f800f R14: ffff8881576c1100 R15: 00000001576c1100
FS: 0000000000000000(0000) GS:ffff88881ae00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff8881576c110c CR3: 0000000767a90000 CR4: 00000000007506f0
PKRU: 55555554
Call Trace:
? __die+0x20/0x70
? page_fault_oops+0x254/0x…
Source: NIST National Vulnerability Database NVD
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2024-40907 has been found in Linux kernel.
Successful exploitation can lead to full system takeover. CVSS score: 9.8/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "Linux kernel CVE-2024-40907" on the vendor's site.
CVE-2024-40907 (Linux kernel) — CWE-416 / CVSS v3 9.8
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
Use-after-free (CWE-416) exists in Linux kernel.
Check the vendor advisory for the affected versions of Linux kernel.
Severity: Critical (CVSS 9.8/10). Successful exploitation can lead to full system takeover.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで Linux kernel を使っているサービスとバージョンを洗い出す。
-
2Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2024-40907 linux Fixed in: 6.9.7-1
- Ubuntu UBUNTU-CVE-2024-40907 linux-hwe-edge
References
- advisory github.com
- advisory nvd.nist.gov
- package git.kernel.org
- web git.kernel.org
- web git.kernel.org