CVE-2024-35941

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2024-35941
Rejected reason: This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.
CVSS

No CVSS.

References

No reference.

Configurations

No configuration.

History

04 Jun 2024, 13:15

Type Values Removed Values Added
Summary (en) In the Linux kernel, the following vulnerability has been resolved: net: skbuff: add overflow debug check to pull/push helpers syzbot managed to trigger following splat: BUG: KASAN: use-after-free in __skb_flow_dissect+0x4a3b/0x5e50 Read of size 1 at addr ffff888208a4000e by task a.out/2313 [..] __skb_flow_dissect+0x4a3b/0x5e50 __skb_get_hash+0xb4/0x400 ip_tunnel_xmit+0x77e/0x26f0 ipip_tunnel_xmit+0x298/0x410 .. Analysis shows that the skb has a valid ->head, but bogus ->data pointer. skb->data gets its bogus value via the neigh layer, which does: 1556 __skb_pull(skb, skb_network_offset(skb)); ... and the skb was already dodgy at this point: skb_network_offset(skb) returns a negative value due to an earlier overflow of skb->network_header (u16). __skb_pull thus "adjusts" skb->data by a huge offset, pointing outside skb->head area. Allow debug builds to splat when we try to pull/push more than INT_MAX bytes. After this, the syzkaller reproducer yields a more precise splat before the flow dissector attempts to read off skb->data memory: WARNING: CPU: 5 PID: 2313 at include/linux/skbuff.h:2653 neigh_connected_output+0x28e/0x400 ip_finish_output2+0xb25/0xed0 iptunnel_xmit+0x4ff/0x870 ipgre_xmit+0x78e/0xbb0 (en) Rejected reason: This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.
References
  • {'url': 'https://git.kernel.org/stable/c/1b2b26595bb09febf14c5444c873ac4ec90a5a77', 'source': '416baaa9-dc9f-4396-8d5f-8c081fb06d67'}
  • {'url': 'https://git.kernel.org/stable/c/219eee9c0d16f1b754a8b85275854ab17df0850a', 'source': '416baaa9-dc9f-4396-8d5f-8c081fb06d67'}
  • {'url': 'https://git.kernel.org/stable/c/8af60bb2b215f478b886f1d6d302fefa7f0b917d', 'source': '416baaa9-dc9f-4396-8d5f-8c081fb06d67'}
  • {'url': 'https://git.kernel.org/stable/c/fff05b2b004d9a8a2416d08647f3dc9068e357c8', 'source': '416baaa9-dc9f-4396-8d5f-8c081fb06d67'}

19 May 2024, 11:15

Type Values Removed Values Added
New CVE
Information

Published : 2024-05-19 11:15

Updated : 2024-06-04 13:15

NVD link : CVE-2024-35941

Mitre link : CVE-2024-35941

CVE.ORG link : CVE-2024-35941

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Products Affected

No product.

CWE

No CWE.