- 3.3LowCVSS base score
- 0.23%Exploitation in 30 daysEPSS · top 86% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: dccp: Fix memory leak in dccp_feat_change_recv If dccp_feat_push_confirm() fails after new value for SP feature was accepted without reconciliation ('entry == NULL' branch), memory allocated for that value with dccp_feat_clone_sp_val() is never freed. Here is the kmemleak stack for this: unreferenced object 0xffff88801d4ab488 (size 8): comm "syz-executor310", pid 1127, jiffies 4295085598 (age 41.666s) hex dump (first 8 bytes): 01 b4 4a 1d 80 88 ff ff ..J..... backtrace: [<00000000db7cabfe>] kmemdup+0x23/0x50 mm/util.c:128 [<0000000019b38405>] kmemdup include/linux/string.h:465 [inline] [<0000000019b38405>] dccp_feat_clone_sp_val net/dccp/feat.c:371 [inline] [<0000000019b38405>] dccp_feat_clone_sp_val net/dccp/feat.c:367 [inline] [<0000000019b38405>] dccp_feat_change_recv net/dccp/feat.c:1145 [inline] [<0000000019b38405>] dccp_feat_parse_options+0x1196/0x2180 net/dccp/feat.c:1416 [<00000000b1f6d94a>] dccp_parse_options+0xa2a/0x1260 net/dccp/options.c:125 [<0000000030d7b621>] dccp_rcv_state_process+0x197/0x13d0 net/dccp/input.c:650 [<000000001f74c72e>] dccp_v4_do_rcv+0xf9/0x1a0 net/dccp/ipv4.c:688 [<00000000a6c24128>] sk_backlog_rcv include/net/sock.h:1041 [inline] [<00000000a6c24128>] __release_sock+0x139/0x3b0 net/core/sock.c:2570 [<00000000cf1f3a53>] release_sock+0x54/0x1b0 net/core/sock.c:3111 [<000000008422fa23>] inet_wait_for_connect net/ipv4/af_inet.c:603 [inline] [<000000008422fa23>] __inet_stream_connect+0x5d0/0xf70 net/ipv4/af_inet.c:696 [<0000000015b6f64d>] inet_stream_connect+0x53/0xa0 net/ipv4/af_inet.c:735 [<0000000010122488>] __sys_connect_file+0x15c/0x1a0 net/socket.c:1865 [<00000000b4b70023>] __sys_connect+0x165/0x1a0 net/socket.c:1882 [<00000000f4cb3815>] __do_sys_connect net/socket.c:1892 [inline] [<00000000f4cb3815>] __se_sys_connect net/socket.c:1889 [inline] [<00000000f4cb3815>] __x64_sys_connect+0x6e/0xb0 net/socket.c:1889 [<00000000e7b1e839>] do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 [<0000000055e91434>] entry_SYSCALL_64_after_hwframe+0x67/0xd1 Clean up the allocated memory in case of dccp_feat_push_confirm() failure and bail out with an error reset code. Found by Linux Verification Center (linuxtesting.org) with Syzkaller.
Timeline
ID reserved
By Linux
Published
- 17 months later
· 17 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Low3.3 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L |
| 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)
- 0.23% · top 86% of all CVEs (12 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: Low 3.3.
Affected products
- affected e77b8363b2ea7c0d89919547c1a8b0562f298b57 – < 623be080ab3c13d71570bd32f7202a8efa8e2252
- affected e77b8363b2ea7c0d89919547c1a8b0562f298b57 – < c99507fff94b926fc92279c92d80f229c91cb85d
- affected e77b8363b2ea7c0d89919547c1a8b0562f298b57 – < bc3d4423def1a9412a0ae454cb4477089ab79276
- affected e77b8363b2ea7c0d89919547c1a8b0562f298b57 – < 6ff67909ee2ffad911e3122616df41dee23ff4f6
- affected e77b8363b2ea7c0d89919547c1a8b0562f298b57 – < d3ec686a369fae5034303061f003cd3f94ddfd23
- affected e77b8363b2ea7c0d89919547c1a8b0562f298b57 – < 9ee68b0f23706a77f53c832457b9384178b76421
- affected e77b8363b2ea7c0d89919547c1a8b0562f298b57 – < 22be4727a8f898442066bcac34f8a1ad0bc72e14
- affected 2.6.29
- unaffected < 2.6.29
- unaffected 5.4.287 – ≤ 5.4.*
- unaffected 5.10.231 – ≤ 5.10.*
- unaffected 5.15.174 – ≤ 5.15.*
- unaffected 6.1.120 – ≤ 6.1.*
- unaffected 6.6.66 – ≤ 6.6.*
- unaffected 6.12.5 – ≤ 6.12.*
- unaffected 6.13 – ≤ *
References
References9
- https://git.kernel.org/stable/c/623be080ab3c13d71570bd32f7202a8efa8e2252 (opens in a new tab)
- https://git.kernel.org/stable/c/c99507fff94b926fc92279c92d80f229c91cb85d (opens in a new tab)
- https://git.kernel.org/stable/c/bc3d4423def1a9412a0ae454cb4477089ab79276 (opens in a new tab)
- https://git.kernel.org/stable/c/6ff67909ee2ffad911e3122616df41dee23ff4f6 (opens in a new tab)
- https://git.kernel.org/stable/c/d3ec686a369fae5034303061f003cd3f94ddfd23 (opens in a new tab)
- https://git.kernel.org/stable/c/9ee68b0f23706a77f53c832457b9384178b76421 (opens in a new tab)
- https://git.kernel.org/stable/c/22be4727a8f898442066bcac34f8a1ad0bc72e14 (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html (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)
- EUVD EUVD-2024-53291 (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)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2024-56643)Record last updated .