# CVE-2024-26834: linux: In the Linux kernel, the following vulnerability has been resolved:  netfilter: nft_flow_offload: release dst in case...

CVE-2024-26834 is fixed in linux on 1 platform, first by DEBIAN-CVE-2024-26834, released April 17, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2024-26834
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0060
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 17, 2024

## Description

In the Linux kernel, the following vulnerability has been resolved:  netfilter: nft_flow_offload: release dst in case direct xmit path is used  Direct xmit does not use it since it calls dev_queue_xmit() to send packets, hence it calls dst_release().  kmemleak reports:  unreferenced object 0xffff88814f440900 (size 184):   comm "softirq", pid 0, jiffies 4294951896   hex dump (first 32 bytes):     00 60 5b 04 81 88 ff ff 00 e6 e8 82 ff ff ff ff  .`[.............     21 0b 50 82 ff ff ff ff 00 00 00 00 00 00 00 00  !.P.............   backtrace (crc cb2bf5d6):     [<000000003ee17107>] kmem_cache_alloc+0x286/0x340     [<0000000021a5de2c>] dst_alloc+0x43/0xb0     [<00000000f0671159>] rt_dst_alloc+0x2e/0x190     [<00000000fe5092c9>] __mkroute_output+0x244/0x980     [<000000005fb96fb0>] ip_route_output_flow+0xc0/0x160     [<0000000045367433>] nf_ip_route+0xf/0x30     [<0000000085da1d8e>] nf_route+0x2d/0x60     [<00000000d1ecd1cb>] nft_flow_route+0x171/0x6a0 [nft_flow_offload]     [<00000000d9b2fb60>] nft_flow_offload_eval+0x4e8/0x700 [nft_flow_offload]     [<000000009f447dbb>] expr_call_ops_eval+0x53/0x330 [nf_tables]     [<00000000072e1be6>] nft_do_chain+0x17c/0x840 [nf_tables]     [<00000000d0551029>] nft_do_chain_inet+0xa1/0x210 [nf_tables]     [<0000000097c9d5c6>] nf_hook_slow+0x5b/0x160     [<0000000005eccab1>] ip_forward+0x8b6/0x9b0     [<00000000553a269b>] ip_rcv+0x221/0x230     [<00000000412872e5>] __netif_receive_skb_one_core+0xfe/0x110

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.82-1 | [DEBIAN-CVE-2024-26834](https://patchblox.com/security/data/fix/linux/debian-cve-2024-26834.md) | Apr 17, 2024 |
| Linux | linux Debian 13.5 (trixie) | 6.7.7-1 | [DEBIAN-CVE-2024-26834](https://patchblox.com/security/data/fix/linux/debian-cve-2024-26834.md) | Apr 17, 2024 |
| Linux | linux Debian 14 | 6.7.7-1 | [DEBIAN-CVE-2024-26834](https://patchblox.com/security/data/fix/linux/debian-cve-2024-26834.md) | Apr 17, 2024 |

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