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CVE-2026-52993— tipc: fix double-free in tipc_buf_append()

EPSS 0.18% · P7
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I. Basic Information for CVE-2026-52993

Vulnerability Information
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Vulnerability Title
tipc: fix double-free in tipc_buf_append()
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: tipc: fix double-free in tipc_buf_append() tipc_msg_validate() can potentially reallocate the skb it is validating, freeing the old one. In tipc_buf_append(), it was being called with a pointer to a local variable which was a copy of the caller's skb pointer. If the skb was reallocated and validation subsequently failed, the error handling path would free the original skb pointer, which had already been freed, leading to double-free. Fix this by checking if head now points to a newly allocated reassembled skb. If it does, reassign *headbuf for later freeing operations.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux d618d09a68e4eed7a435beb2e355250f6f40664a ~ a438975a6dcdbd70865978c021650d1485586f0b -
LinuxLinux 4.15 -

II. Public POCs for CVE-2026-52993

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III. Intelligence Information for CVE-2026-52993

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Patches & Fixes for CVE-2026-52993 (3)

Other References for CVE-2026-52993 (1)

Other References for CVE-2026-52993 (3)

Same Patch Batch · Linux · 2026-06-24 · 219 CVEs total

CVE-2026-52980sched/fair: Clear rel_deadline when initializing forked entities
CVE-2026-52992fs/adfs: validate nzones in adfs_validate_bblk()
CVE-2026-52991sched/psi: fix race between file release and pressure write
CVE-2026-52990fsnotify: fix inode reference leak in fsnotify_recalc_mask()
CVE-2026-52988netfilter: nf_tables: join hook list via splice_list_rcu() in commit phase
CVE-2026-52989nvmet-tcp: propagate nvmet_tcp_build_pdu_iovec() errors to its callers
CVE-2026-52987drm/amdgpu: avoid double drm_exec_fini() in userq validate
CVE-2026-52986netfilter: nf_conntrack_sip: don't use simple_strtoul
CVE-2026-52985netdevsim: zero initialize struct iphdr in dummy sk_buff
CVE-2026-52984net/sched: netem: fix queue limit check to include reordered packets
CVE-2026-52982net: usb: rtl8150: fix use-after-free in rtl8150_start_xmit()
CVE-2026-52983net: airoha: fix BQL imbalance in TX path
CVE-2026-52981neigh: let neigh_xmit take skb ownership
CVE-2026-52979net: psp: check for device unregister when creating assoc
CVE-2026-52968KVM: s390: pci: fix GAIT table indexing due to double-scaling pointer arithmetic
CVE-2026-52972crypto: af_alg - Cap AEAD AD length to 0x80000000
CVE-2026-52970netfilter: nft_ct: fix missing expect put in obj eval
CVE-2026-52969KVM: Reject wrapped offset in kvm_reset_dirty_gfn()
CVE-2026-52971net: ena: PHC: Fix potential use-after-free in get_timestamp
CVE-2026-52967smb/client: fix possible infinite loop and oob read in symlink_data()

Showing top 20 of 219 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-52993

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