5.5

CVE-2024-26633: debian debian_linux

CVSS: 5.5v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2024-26633DEBIAN-CVE-2024-26633
Published 18-03-2024Last modified 23-05-2026
Open JSON

Vulnerability summary

CVE-2024-26633 is a medium (CVSS 5.5) vulnerability in debian debian_linux. EPSS estimates a 0.33% chance of exploitation in the next 30 days, higher than 24.6% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.33%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 29 · Related 29
DLA-3840-1DLA-3841-1RHSA-2024:2394SUSE-SU-2024:2360-1SUSE-SU-2024:2381-1SUSE-SU-2024:2561-1

Timeline

  1. 18-03-2024
    PublishedVulnerability first disclosed.
  2. 23-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: ip6_tunnel: fix NEXTHDR_FRAGMENT handling in ip6_tnl_parse_tlv_enc_lim() syzbot pointed out [1] that NEXTHDR_FRAGMENT handling is broken. Reading frag_off can only be done if we pulled enough bytes to skb->head. Currently we might access garbage. [1] BUG: KMSAN: uninit-value in ip6_tnl_parse_tlv_enc_lim+0x94f/0xbb0 ip6_tnl_parse_tlv_enc_lim+0x94f/0xbb0 ipxip6_tnl_xmit net/ipv6/ip6_tunnel.c:1326 [inline] ip6_tnl_start_xmit+0xab2/0x1a70 net/ipv6/ip6_tunnel.c:1432 __netdev_start_xmit include/linux/netdevice.h:4940 [inline] netdev_start_xmit include/linux/netdevice.h:4954 [inline] xmit_one net/core/dev.c:3548 [inline] dev_hard_start_xmit+0x247/0xa10 net/core/dev.c:3564 __dev_queue_xmit+0x33b8/0x5130 net/core/dev.c:4349 dev_queue_xmit include/linux/netdevice.h:3134 [inline] neigh_connected_output+0x569/0x660 net/core/neighbour.c:1592 neigh_output include/net/neighbour.h:542 [inline] ip6_finish_output2+0x23a9/0x2b30 net/ipv6/ip6_output.c:137 ip6_finish_output+0x855/0x12b0 net/ipv6/ip6_output.c:222 NF_HOOK_COND include/linux/netfilter.h:303 [inline] ip6_output+0x323/0x610 net/ipv6/ip6_output.c:243 dst_output include/net/dst.h:451 [inline] ip6_local_out+0xe9/0x140 net/ipv6/output_core.c:155 ip6_send_skb net/ipv6/ip6_output.c:1952 [inline] ip6_push_pending_frames+0x1f9/0x560 net/ipv6/ip6_output.c:1972 rawv6_push_pending_frames+0xbe8/0xdf0 net/ipv6/raw.c:582 rawv6_sendmsg+0x2b66/0x2e70 net/ipv6/raw.c:920 inet_sendmsg+0x105/0x190 net/ipv4/af_inet.c:847 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] ____sys_sendmsg+0x9c2/0xd60 net/socket.c:2584 ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2638 __sys_sendmsg net/socket.c:2667 [inline] __do_sys_sendmsg net/socket.c:2676 [inline] __se_sys_sendmsg net/socket.c:2674 [inline] __x64_sys_sendmsg+0x307/0x490 net/socket.c:2674 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b Uninit was created at: slab_post_alloc_hook+0x129/0xa70 mm/slab.h:768 slab_alloc_node mm/slub.c:3478 [inline] __kmem_cache_alloc_node+0x5c9/0x970 mm/slub.c:3517 __do_kmalloc_node mm/slab_common.c:1006 [inline] __kmalloc_node_track_caller+0x118/0x3c0 mm/slab_common.c:1027 kmalloc_reserve+0x249/0x4a0 net/core/skbuff.c:582 pskb_expand_head+0x226/0x1a00 net/core/skbuff.c:2098 __pskb_pull_tail+0x13b/0x2310 net/core/skbuff.c:2655 pskb_may_pull_reason include/linux/skbuff.h:2673 [inline] pskb_may_pull include/linux/skbuff.h:2681 [inline] ip6_tnl_parse_tlv_enc_lim+0x901/0xbb0 net/ipv6/ip6_tunnel.c:408 ipxip6_tnl_xmit net/ipv6/ip6_tunnel.c:1326 [inline] ip6_tnl_start_xmit+0xab2/0x1a70 net/ipv6/ip6_tunnel.c:1432 __netdev_start_xmit include/linux/netdevice.h:4940 [inline] netdev_start_xmit include/linux/netdevice.h:4954 [inline] xmit_one net/core/dev.c:3548 [inline] dev_hard_start_xmit+0x247/0xa10 net/core/dev.c:3564 __dev_queue_xmit+0x33b8/0x5130 net/core/dev.c:4349 dev_queue_xmit include/linux/netdevice.h:3134 [inline] neigh_connected_output+0x569/0x660 net/core/neighbour.c:1592 neigh_output include/net/neighbour.h:542 [inline] ip6_finish_output2+0x23a9/0x2b30 net/ipv6/ip6_output.c:137 ip6_finish_output+0x855/0x12b0 net/ipv6/ip6_output.c:222 NF_HOOK_COND include/linux/netfilter.h:303 [inline] ip6_output+0x323/0x610 net/ipv6/ip6_output.c:243 dst_output include/net/dst.h:451 [inline] ip6_local_out+0xe9/0x140 net/ipv6/output_core.c:155 ip6_send_skb net/ipv6/ip6_output.c:1952 [inline] ip6_push_pending_frames+0x1f9/0x560 net/ipv6/ip6_output.c:1972 rawv6_push_pending_frames+0xbe8/0xdf0 net/ipv6/raw.c:582 rawv6_sendmsg+0x2b66/0x2e70 net/ipv6/raw.c:920 inet_sendmsg+0x105/0x190 net/ipv4/af_inet.c:847 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] ____sys_sendmsg+0x9c2/0xd60 net/socket.c:2584 ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2638 __sys_sendmsg net/socket.c:2667 [inline] __do_sys_sendms ---truncated---

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.33%

Chance of exploitation in the next 30 days

Percentile

25%

Versus all other CVEs

30-day change

0.00 pp

From 0.33% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.33%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu116 products
  • linux< 4.4.0-261.295 | < 4.15.0-231.243 | < 5.4.0-176.196 | < 5.15.0-102.112
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 4.4.0-1138.144 | < 4.4.0-1176.191 | < 4.15.0-1175.188 | < 5.4.0-1122.132 | < 5.15.0-1057.63
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Netapp18 products
Debian2 products
Linux2 products
  • linux≥ fbfa743a9d2a0ffa24251764f10afc13eb21e739, < 135414f300c5db995e2a2f3bf0f455de9d014aee | ≥ fbfa743a9d2a0ffa24251764f10afc13eb21e739, < 3f15ba3dc14e6ee002ea01b4faddc3d49200377c | ≥ fbfa743a9d2a0ffa24251764f10afc13eb21e739, < da23bd709b46168f7dfc36055801011222b076cd | ≥ fbfa743a9d2a0ffa24251764f10afc13eb21e739, < 4329426cf6b8e22b798db2331c7ef1dd2a9c748d | ≥ fbfa743a9d2a0ffa24251764f10afc13eb21e739, < 62a1fedeb14c7ac0947ef33fadbabd35ed2400a2 | ≥ fbfa743a9d2a0ffa24251764f10afc13eb21e739, < 687c5d52fe53e602e76826dbd4d7af412747e183 | ≥ fbfa743a9d2a0ffa24251764f10afc13eb21e739, < ba8d904c274268b18ef3dc11d3ca7b24a96cb087 | ≥ fbfa743a9d2a0ffa24251764f10afc13eb21e739, < d375b98e0248980681e5e56b712026174d617198 | a6f6bb6bc04a5f88a31f47a6123d3fbf5ee8d694 | 72bbf335e7aad09c88c50dbdd238f4faabd12174 | decccc92ee0a978a1c268b5df16824cb6384ed3c | d3d9b59ab32160e3cc4edcf7e5fa7cecb53a7d25 | d397f7035d2c754781bbe93b07b94d8cd898620c | 41e07a7e01d951cfd4c9a7dac90c921269d89513 | a7fe4e5d06338e1a82b1977eca37400951f99730 | ≥ 3.2.87, < 3.3 | ≥ 3.10.106, < 3.11 | ≥ 3.12.71, < 3.13 | ≥ 3.16.42, < 3.17 | ≥ 3.18.49, < 3.19 | ≥ 4.4.50, < 4.5 | ≥ 4.9.11, < 4.10 | 4.10
  • linux_kernel≥ 4.10, < 4.19.306 | ≥ 4.20, < 5.4.268 | ≥ 5.5, < 5.10.209 | ≥ 5.11, < 5.15.148 | ≥ 5.16, < 6.1.75 | ≥ 6.2, < 6.6.14 | ≥ 6.7, < 6.7.2

4 vendors · 138 products

References

32 links
Show all 32 references