{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-23343 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-23343 is a high-severity vulnerability in Linux kernel, published on 25 Mar 2026."},"fix_prompt":"Check this codebase for CVE-2026-23343 and fix it if it is affected.\n\nWhat it is: CVE-2026-23343 is a high-severity vulnerability in Linux kernel, published on 25 Mar 2026. \nExploitation: There is no known exploitation of CVE-2026-23343 in the wild and no public exploit code.\n\nAffected product: Linux kernel. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-23343/ (Markdown: https://insights.sbomify.com/CVE-2026-23343/index.md)","id":"CVE-2026-23343","markdown":"https://insights.sbomify.com/CVE-2026-23343/index.md","name":"CVE-2026-23343","record":{"aliases":["AZL-80730","BELL-CVE-2026-23343","DEBIAN-CVE-2026-23343","GHSA-rqf2-6q66-wgpp","ROOT-OS-DEBIAN-12-CVE-2026-23343","ROOT-OS-DEBIAN-13-CVE-2026-23343","ROOT-OS-UBUNTU-2404-CVE-2026-23343","UBUNTU-CVE-2026-23343"],"analysis":null,"analysis_generated_by":null,"assigner":"Linux","cpe":[{"product":"linux_kernel","vendor":"linux"}],"cvss":{"score":7.8,"severity":"high","source":"nvd","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-787","name":"Out-of-bounds Write"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nxdp: produce a warning when calculated tailroom is negative\n\nMany ethernet drivers report xdp Rx queue frag size as being the same as\nDMA write size. However, the only user of this field, namely\nbpf_xdp_frags_increase_tail(), clearly expects a truesize.\n\nSuch difference leads to unspecific memory corruption issues under certain\ncircumstances, e.g. in ixgbevf maximum DMA write size is 3 KB, so when\nrunning xskxceiver's XDP_ADJUST_TAIL_GROW_MULTI_BUFF, 6K packet fully uses\nall DMA-writable space in 2 buffers. This would be fine, if only\nrxq-\u003efrag_size was properly set to 4K, but value of 3K results in a\nnegative tailroom, because there is a non-zero page offset.\n\nWe are supposed to return -EINVAL and be done with it in such case, but due\nto tailroom being stored as an unsigned int, it is reported to be somewhere\nnear UINT_MAX, resulting in a tail being grown, even if the requested\noffset is too much (it is around 2K in the abovementioned test). This later\nleads to all kinds of unspecific calltraces.\n\n[ 7340.337579] xskxceiver[1440]: segfault at 1da718 ip 00007f4161aeac9d sp 00007f41615a6a00 error 6\n[ 7340.338040] xskxceiver[1441]: segfault at 7f410000000b ip 00000000004042b5 sp 00007f415bffecf0 error 4\n[ 7340.338179]  in libc.so.6[61c9d,7f4161aaf000+160000]\n[ 7340.339230]  in xskxceiver[42b5,400000+69000]\n[ 7340.340300]  likely on CPU 6 (core 0, socket 6)\n[ 7340.340302] Code: ff ff 01 e9 f4 fe ff ff 0f 1f 44 00 00 4c 39 f0 74 73 31 c0 ba 01 00 00 00 f0 0f b1 17 0f 85 ba 00 00 00 49 8b 87 88 00 00 00 \u003c4c\u003e 89 70 08 eb cc 0f 1f 44 00 00 48 8d bd f0 fe ff ff 89 85 ec fe\n[ 7340.340888]  likely on CPU 3 (core 0, socket 3)\n[ 7340.345088] Code: 00 00 00 ba 00 00 00 00 be 00 00 00 00 89 c7 e8 31 ca ff ff 89 45 ec 8b 45 ec 85 c0 78 07 b8 00 00 00 00 eb 46 e8 0b c8 ff ff \u003c8b\u003e 00 83 f8 69 74 24 e8 ff c7 ff ff 8b 00 83 f8 0b 74 18 e8 f3 c7\n[ 7340.404334] Oops: general protection fault, probably for non-canonical address 0x6d255010bdffc: 0000 [#1] SMP NOPTI\n[ 7340.405972] CPU: 7 UID: 0 PID: 1439 Comm: xskxceiver Not tainted 6.19.0-rc1+ #21 PREEMPT(lazy)\n[ 7340.408006] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.17.0-5.fc42 04/01/2014\n[ 7340.409716] RIP: 0010:lookup_swap_cgroup_id+0x44/0x80\n[ 7340.410455] Code: 83 f8 1c 73 39 48 ba ff ff ff ff ff ff ff 03 48 8b 04 c5 20 55 fa bd 48 21 d1 48 89 ca 83 e1 01 48 d1 ea c1 e1 04 48 8d 04 90 \u003c8b\u003e 00 48 83 c4 10 d3 e8 c3 cc cc cc cc 31 c0 e9 98 b7 dd 00 48 89\n[ 7340.412787] RSP: 0018:ffffcc5c04f7f6d0 EFLAGS: 00010202\n[ 7340.413494] RAX: 0006d255010bdffc RBX: ffff891f477895a8 RCX: 0000000000000010\n[ 7340.414431] RDX: 0001c17e3fffffff RSI: 00fa070000000000 RDI: 000382fc7fffffff\n[ 7340.415354] RBP: 00fa070000000000 R08: ffffcc5c04f7f8f8 R09: ffffcc5c04f7f7d0\n[ 7340.416283] R10: ffff891f4c1a7000 R11: ffffcc5c04f7f9c8 R12: ffffcc5c04f7f7d0\n[ 7340.417218] R13: 03ffffffffffffff R14: 00fa06fffffffe00 R15: ffff891f47789500\n[ 7340.418229] FS:  0000000000000000(0000) GS:ffff891ffdfaa000(0000) knlGS:0000000000000000\n[ 7340.419489] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ 7340.420286] CR2: 00007f415bfffd58 CR3: 0000000103f03002 CR4: 0000000000772ef0\n[ 7340.421237] PKRU: 55555554\n[ 7340.421623] Call Trace:\n[ 7340.421987]  \u003cTASK\u003e\n[ 7340.422309]  ? softleaf_from_pte+0x77/0xa0\n[ 7340.422855]  swap_pte_batch+0xa7/0x290\n[ 7340.423363]  zap_nonpresent_ptes.constprop.0.isra.0+0xd1/0x270\n[ 7340.424102]  zap_pte_range+0x281/0x580\n[ 7340.424607]  zap_pmd_range.isra.0+0xc9/0x240\n[ 7340.425177]  unmap_page_range+0x24d/0x420\n[ 7340.425714]  unmap_vmas+0xa1/0x180\n[ 7340.426185]  exit_mmap+0xe1/0x3b0\n[ 7340.426644]  __mmput+0x41/0x150\n[ 7340.427098]  exit_mm+0xb1/0x110\n[ 7340.427539]  do_exit+0x1b2/0x460\n[ 7340.427992]  do_group_exit+0x2d/0xc0\n[ 7340.428477]  get_signal+0x79d/0x7e0\n[ 7340.428957]  arch_do_signal_or_restart+0x34/0x100\n[ 7340.429571]  exit_to_user_mode_loop+0x8e/0x4c0\n[ 7340.430159]  do_syscall_64+0x188/\n---truncated---","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"xdp: produce a warning when calculated tailroom is negative","id":"CVE-2026-23343","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":null,"year":"2026"},"n_packages":0,"n_references":6,"next":{"headline":"crypto: ccp - Fix use-after-free on error path","id":"CVE-2026-23344"},"packages":[],"prev":{"headline":"bpf: Fix race in cpumap on PREEMPT_RT","id":"CVE-2026-23342"},"products":["Linux"],"published":"2026-03-25","related":[{"cvss_score":8.8,"headline":"Linux Kernel Out-of-Bounds Write","id":"CVE-2026-53266","kev_date_added":"2026-09-18","published":"2026-06-25"},{"cvss_score":8.8,"headline":"Linux Kernel Improper Input Validation","id":"CVE-2013-6282","kev_date_added":"2022-09-15","published":"2013-11-19"},{"cvss_score":8.4,"headline":"Linux Kernel Heap-Based Buffer Overflow","id":"CVE-2022-0185","kev_date_added":"2024-08-21","published":"2022-02-11"},{"cvss_score":8.4,"headline":"Linux Kernel Privilege Escalation","id":"CVE-2013-2094","kev_date_added":"2022-09-15","published":"2013-05-14"},{"cvss_score":7.8,"headline":"Linux Kernel Unspecified","id":"CVE-2026-53362","kev_date_added":"2026-08-27","published":"2026-07-04"},{"cvss_score":7.8,"headline":"Linux Kernel Missing Initialization of a Variable","id":"CVE-2026-46300","kev_date_added":"2026-10-28","published":"2026-05-23"},{"cvss_score":7.8,"headline":"Linux Kernel Race Condition","id":"CVE-2025-39964","kev_date_added":"2026-09-18","published":"2025-10-13"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-10-15","vendors":["Linux"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-23343/"}