CVE-2023-53365
ip6mr: Fix skb_under_panic in ip6mr_cache_report()
- Published
- Updated
- Reserved
- Assigned by
- Linux
Description
In the Linux kernel, the following vulnerability has been resolved: ip6mr: Fix skb_under_panic in ip6mr_cache_report() skbuff: skb_under_panic: text:ffffffff88771f69 len:56 put:-4 head:ffff88805f86a800 data:ffff887f5f86a850 tail:0x88 end:0x2c0 dev:pim6reg ------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:192! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 2 PID: 22968 Comm: kworker/2:11 Not tainted 6.5.0-rc3-00044-g0a8db05b571a #236 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014 Workqueue: ipv6_addrconf addrconf_dad_work RIP: 0010:skb_panic+0x152/0x1d0 Call Trace: <TASK> skb_push+0xc4/0xe0 ip6mr_cache_report+0xd69/0x19b0 reg_vif_xmit+0x406/0x690 dev_hard_start_xmit+0x17e/0x6e0 __dev_queue_xmit+0x2d6a/0x3d20 vlan_dev_hard_start_xmit+0x3ab/0x5c0 dev_hard_start_xmit+0x17e/0x6e0 __dev_queue_xmit+0x2d6a/0x3d20 neigh_connected_output+0x3ed/0x570 ip6_finish_output2+0x5b5/0x1950 ip6_finish_output+0x693/0x11c0 ip6_output+0x24b/0x880 NF_HOOK.constprop.0+0xfd/0x530 ndisc_send_skb+0x9db/0x1400 ndisc_send_rs+0x12a/0x6c0 addrconf_dad_completed+0x3c9/0xea0 addrconf_dad_work+0x849/0x1420 process_one_work+0xa22/0x16e0 worker_thread+0x679/0x10c0 ret_from_fork+0x28/0x60 ret_from_fork_asm+0x11/0x20 When setup a vlan device on dev pim6reg, DAD ns packet may sent on reg_vif_xmit(). reg_vif_xmit() ip6mr_cache_report() skb_push(skb, -skb_network_offset(pkt));//skb_network_offset(pkt) is 4 And skb_push declared as: void *skb_push(struct sk_buff *skb, unsigned int len); skb->data -= len; //0xffff88805f86a84c - 0xfffffffc = 0xffff887f5f86a850 skb->data is set to 0xffff887f5f86a850, which is invalid mem addr, lead to skb_push() fails.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.19% · top 91% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Weakness
- CWE-noinfo Not enough information
Affected products
- affected 14fb64e1f449ef6666f1c3a3fa4e13aec669b98d – < a96d74d1076c82a4cef02c150d9996b21354c78d
- affected 14fb64e1f449ef6666f1c3a3fa4e13aec669b98d – < 8382e7ed2d63e6c2daf6881fa091526dc6c879cd
- affected 14fb64e1f449ef6666f1c3a3fa4e13aec669b98d – < 0438e60a00d4e335b3c36397dbf26c74b5d13ef0
- affected 14fb64e1f449ef6666f1c3a3fa4e13aec669b98d – < 1683124129a4263dd5bce2475bab110e95fa0346
- affected 14fb64e1f449ef6666f1c3a3fa4e13aec669b98d – < 1bb54a21f4d9b88442f8c3307c780e2db64417e4
- affected 14fb64e1f449ef6666f1c3a3fa4e13aec669b98d – < 691a09eecad97e745b9aa0e3918db46d020bdacb
- affected 14fb64e1f449ef6666f1c3a3fa4e13aec669b98d – < 3326c711f18d18fe6e1f5d83d3a7eab07e5a1560
- affected 14fb64e1f449ef6666f1c3a3fa4e13aec669b98d – < 30e0191b16e8a58e4620fa3e2839ddc7b9d4281c
- affected 2.6.26
- unaffected < 2.6.26
- unaffected 4.14.322 – ≤ 4.14.*
- unaffected 4.19.291 – ≤ 4.19.*
- unaffected 5.4.253 – ≤ 5.4.*
- unaffected 5.10.190 – ≤ 5.10.*
- unaffected 5.15.126 – ≤ 5.15.*
- unaffected 6.1.45 – ≤ 6.1.*
- unaffected 6.4.10 – ≤ 6.4.*
- unaffected 6.5 – ≤ *
References (8)
- https://git.kernel.org/stable/c/a96d74d1076c82a4cef02c150d9996b21354c78d (opens in a new tab)
- https://git.kernel.org/stable/c/8382e7ed2d63e6c2daf6881fa091526dc6c879cd (opens in a new tab)
- https://git.kernel.org/stable/c/0438e60a00d4e335b3c36397dbf26c74b5d13ef0 (opens in a new tab)
- https://git.kernel.org/stable/c/1683124129a4263dd5bce2475bab110e95fa0346 (opens in a new tab)
- https://git.kernel.org/stable/c/1bb54a21f4d9b88442f8c3307c780e2db64417e4 (opens in a new tab)
- https://git.kernel.org/stable/c/691a09eecad97e745b9aa0e3918db46d020bdacb (opens in a new tab)
- https://git.kernel.org/stable/c/3326c711f18d18fe6e1f5d83d3a7eab07e5a1560 (opens in a new tab)
- https://git.kernel.org/stable/c/30e0191b16e8a58e4620fa3e2839ddc7b9d4281c (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://trackcve.app/cve/CVE-2023-53365)Record last updated .